U.S. patent application number 11/017475 was filed with the patent office on 2006-06-22 for side seam bag with registered, perforated, promotional strips.
Invention is credited to Mark E. Daniels.
Application Number | 20060133701 11/017475 |
Document ID | / |
Family ID | 36595834 |
Filed Date | 2006-06-22 |
United States Patent
Application |
20060133701 |
Kind Code |
A1 |
Daniels; Mark E. |
June 22, 2006 |
Side seam bag with registered, perforated, promotional strips
Abstract
A side seam bag with registered, perforated, promotional strips
is formed from a continuous sheet of polyethylene material folded
along a longitudinal axis to form a pocket. A continuous strip of
polyethylene material is perforated into serial groupings of first
and second end sections located on either end of removable center
sections. Promotional material is printed on a surface of the
center sections. A portion of the strip is located orthogonally to
the long axis of the pocket and the first and second end sections
are registered and sealed to the upper surface of the pocket as it
is divided into side seam bags with first and second side seals.
The bags with strips attached are cut and stacked into packs or
perforated and wound on rolls. When the pocket is formed, an
additional perforation is spaced from the open side of the pocket
to form a detachable header strip.
Inventors: |
Daniels; Mark E.; (Rolling
Hills Estates, CA) |
Correspondence
Address: |
BELASCO, JACOBS & TOWNSLEY LLP;HOWARD HUGHES CENTER
6100 CENTER DRIVE
SUITE 630
LOS ANGELES
CA
90045
US
|
Family ID: |
36595834 |
Appl. No.: |
11/017475 |
Filed: |
December 20, 2004 |
Current U.S.
Class: |
383/127 ;
383/37 |
Current CPC
Class: |
B31B 2155/00 20170801;
B31B 2160/10 20170801; B31B 2155/001 20170801; B31B 70/8123
20170801; B31B 2155/0014 20170801; B65D 33/004 20130101; B31B 70/00
20170801 |
Class at
Publication: |
383/127 ;
383/037 |
International
Class: |
B65D 30/00 20060101
B65D030/00 |
Claims
1. A side seam polyethylene bag with registered, perforated,
promotional strips comprising: front and rear bag walls, each of
said walls having a top edge, first and second side edges and a
bottom edge; said bottom edge of said front wall being joined to
said bottom edge of said rear wall; said first side edges of said
front and rear bag walls being joined at a first side seam and said
second side edges of said front and rear bag walls being joined at
a second side seam; at least one promotional strip, said
promotional strip having a first end section, at least one
detachable center section, a second end section, an upper surface,
a lower surface, an upper edge and a lower edge; said first and
second end sections being removably attached to said at least one
center section with perforations; said promotional strip being
attached at said first and second end sections to said first and
second side seams, respectively; said at least one detachable
center section having at least one promotional message printed on
at least one of said upper surface and said lower surface of said
strip; said promotional message being registered to said strip so
that all of said message is disposed between said perforations; and
whereby, when said detachable center section is removed from said
first and second end sections, it will comprise at least one
complete promotional message.
2. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 1, wherein: said
promotional strip has horizontal perforations along at least one of
said upper edge and said lower edge; said horizontal perforations
removably attaching at least one additional promotional strip to
said at least one promotional strip; said at least one additional
promotional strip having a first end section, at least one
detachable center section, a second end section, an upper surface,
a lower surface, an upper edge and a lower edge; said first and
second end sections being removably attached to said at least one
center section with perforations; said additional promotional strip
being attached at said first and second end sections to said first
and second side seams, respectively; said at least one detachable
center section having at least one promotional message printed on
at least one of said upper surface and said lower surface of said
strip; said promotional message being registered to said additional
promotional strip so that all of said message is disposed between
said perforations; and whereby, when said detachable center section
of said additional promotional strip is removed from said first and
second end sections, it will comprise at least one complete
promotional message.
3. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 1, further comprising: a
side seam perforation, said side seam perforation removably
attaching said second side seam of said bag to said first side seam
of a subsequent bag; and whereby, when said bags comprise said side
seam perforation they are windable into a compact bag roll.
4. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 1, wherein said center
section of said promotional strip further comprises: at least one
additional perforation, said at least one additional perforation
extending from said upper edge to said lower edge of said
promotional strip; said center section having at least one
promotional message printed on at least one of said upper surface
and said lower surface of said strip; said promotional message
being registered to said strip so that all of said message is
disposed between said perforation and said additional perforation;
and whereby, when said detachable center section is removed from
said first and second end sections, it will comprise at least one
complete promotional message.
5. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 1, wherein the top edge
of at least one of the front and rear bag walls is attached to a
header strip.
6. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 5, wherein the top edge
of at least one of the front and rear bag walls is attached to said
header strip with a perforation.
7. The side seam polyethylene bag with registered, perforated,
promotional strips, as described in claim 5, wherein a plurality of
said header strips are attached together to form a bag pack.
8. A method of making a side seam polyethylene bag with registered,
perforated, promotional strips, comprising the steps of: extruding
a continuous strip of polyethylene material, said polyethylene
strip having an upper edge, a lower edge, an upper surface and a
lower surface; printing a plurality of promotional messages and a
plurality of first alignment indicators upon said upper surface of
said polyethylene strip; winding said continuous strip into a first
roll; extruding a continuous sheet of polyethylene material, said
sheet having a first edge and a second edge; folding said sheet
along a longitudinal axis to form a continuous pocket having a
closed bottom, an open top, an inner surface, an outer surface, a
top layer and a bottom layer; printing a plurality of second
alignment indicators on said outer surface; unwinding said strip
from said roll; perforating said strip into serial groupings of
first end sections, detachable center sections and second end
sections; disposing a portion of said strip orthogonally over said
pocket; aligning one of said first alignment indicators with one of
said second alignment indicators; sealing said first end section of
said portion of said strip to said outer surface on said top layer
and sealing said top layer to said bottom layer, thereby forming a
first side seam; sealing said second end section of said portion of
said strip to said outer surface on said top layer and sealing said
top layer to said bottom layer, thereby forming a second side seam;
and cutting a finished bag from said continuous pocket.
9. A method of making a side seam polyethylene bag with registered,
perforated, promotional strips, comprising the steps of: extruding
a continuous strip of polyethylene material, said polyethylene
strip having an upper edge, a lower edge, an upper surface and a
lower surface; printing a plurality of promotional messages and a
plurality of first alignment indicators upon said upper surface of
said polyethylene strip; perforating said strip into serial
groupings of first end sections, detachable center sections and
second end sections; winding said continuous strip into a first
roll; extruding a continuous sheet of polyethylene material, said
sheet having a first edge and a second edge; folding said sheet
along a longitudinal axis to form a continuous pocket having a
closed bottom, an open top, an inner surface, an outer surface, a
top layer and a bottom layer; printing a plurality of second
alignment indicators on said outer surface; unwinding said strip
from said roll; disposing a portion of said strip orthogonally over
said pocket; aligning one of said first alignment indicators with
one of said second alignment indicators; sealing said first end
section of said portion of said strip to said outer surface on said
top layer and sealing said top layer to said bottom layer, forming
a first side seam; sealing said second end section of said portion
of said strip to said outer surface on said top layer and sealing
said top layer to said bottom layer, forming a second side seam and
thereby forming a finished bag; forming a perforation between said
second side seam of a first bag and said first side seam of a
subsequent bag; and rolling said bags into a compact roll.
10. A method of making a side seam polyethylene bag with
registered, perforated, promotional strips, comprising the steps
of: extruding a continuous strip of polyethylene material, said
polyethylene strip having an upper edge, a lower edge, an upper
surface and a lower surface; printing a plurality of promotional
messages and a plurality of first alignment indicators upon said
upper surface of said polyethylene strip; winding said continuous
strip into a first roll; extruding a continuous sheet of
polyethylene material, said sheet having a first edge and a second
edge; folding said sheet along a longitudinal axis to form a
continuous pocket having a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer;
perforating at least one of said top layer and said bottom layer
parallel and adjacent to said open top to form an attached header
strip; printing a plurality of second alignment indicators on said
outer surface; unwinding said strip from said roll; perforating
said strip into serial groupings of first end sections, detachable
center sections and second end sections; disposing a portion of
said strip orthogonally over said pocket; aligning one of said
first alignment indicators with one of said second alignment
indicators; sealing said first end section of said portion of said
strip to said outer surface on said top layer and sealing said top
layer to said bottom layer, thereby forming a first side seam;
sealing said second end section of said portion of said strip to
said outer surface on said top layer and sealing said top layer to
said bottom layer, thereby forming a second side seam; and cutting
a finished bag from said continuous pocket.
11. An apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips, comprising: a supply of
polyethylene material; a first extruder, said first extruder
forming a continuous polyethylene strip, said strip having an upper
edge, a lower edge, an upper surface and a lower surface; a first
printer, said first printer marking a plurality of promotional
messages and a plurality of first alignment indicators upon said
upper surface of said polyethylene strip; a winder, said winder
forming said polyethylene strip into a first roll; an unwind stand,
said unwind stand controllably dispensing said polyethylene strip
from said first roll; a second extruder, said second extruder
forming a continuous sheet of polyethylene material, said sheet
having a first edge and a second edge; a sheet folder, said sheet
folder forming said sheet along a longitudinal axis to form a
continuous pocket having a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer; a second
printer, said second printer marking a plurality of second
alignment indicators on said outer surface; a first perforator,
said first perforator perforating said strip into serial groupings
of first end sections, detachable center sections and second end
sections; a tractor, said tractor pulling said strip from said
first roll disposed upon said unwind stand and disposing a portion
of said strip orthogonally over said pocket; a first sensor, said
first sensor detecting said first alignment indicator on said
strip; a second sensor, said second sensor detecting said second
alignment indicator on said outer surface of said pocket; a
controller, said controller being connected to said first and
second sensors and aligning one of said first alignment indicators
with one of said second alignment indicators; a sealer, said sealer
sealing said first end section of said portion of said strip to
said outer surface on said top layer and sealing said top layer to
said bottom layer, forming a first side seam, sealing said second
end section of said portion of said strip to said outer surface on
said top layer and sealing said top layer to said bottom layer,
thereby forming a second side seam; and a cutter, said cutter
cutting a finished bag from said continuous pocket.
12. The apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips, as described in claim
11, wherein said controller adjusts the speed of said unwind stand
to align said first alignment indicator with said second alignment
indicator.
13. An apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips, comprising: a supply of
polyethylene material; a first extruder, said first extruder
forming a continuous polyethylene strip, said strip having an upper
edge, a lower edge, an upper surface and a lower surface; a first
printer, said first printer marking a plurality of promotional
messages and a plurality of first alignment indicators upon said
upper surface of said polyethylene strip; a first perforator, said
first perforator perforating said strip into serial groupings of
first end sections, detachable center sections and second end
sections; a winder, said winder forming said polyethylene strip
into a first roll; an unwind stand, said unwind stand controllably
dispensing said polyethylene strip from said first roll; a second
extruder, said second extruder forming a continuous sheet of
polyethylene material, said sheet having a first edge and a second
edge; a sheet folder, said sheet folder forming said sheet along a
longitudinal axis to form a continuous pocket having a closed
bottom, an open top, an inner surface, an outer surface, a top
layer and a bottom layer; a second printer, said second printer
marking a plurality of second alignment indicators on said outer
surface; a tractor, said tractor pulling said strip from said first
roll disposed upon said unwind stand and disposing a portion of
said strip orthogonally over said pocket; a first sensor, said
first sensor detecting said first alignment indicator on said
strip; a second sensor, said second sensor detecting said second
alignment indicator on said outer surface of said pocket; a
controller, said controller being connected to said first and
second sensors and aligning one of said first alignment indicators
with one of said second alignment indicators; a sealer, said sealer
sealing said first end section of said portion of said strip to
said outer surface on said top layer and sealing said top layer to
said bottom layer, forming a first side seam, sealing said second
end section of said portion of said strip to said outer surface on
said top layer and sealing said top layer to said bottom layer,
thereby forming a second side seam; and a second perforator, said
second perforator forming a side seam perforation between said
second side seam of a first bag and said first side seam of a
subsequent bag; a roller, said roller rolling said bags into a
compact roll.
14. The apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips, as described in claim
13, wherein said controller adjusts the speed of said unwind stand
to align said first alignment indicator with said second alignment
indicator.
15. An apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips, comprising: a supply of
polyethylene material; a first extruder, said first extruder
forming a continuous polyethylene strip, said strip having an upper
edge, a lower edge, an upper surface and a lower surface; a first
printer, said first printer marking a plurality of promotional
messages and a plurality of first alignment indicators upon said
upper surface of said polyethylene strip; a winder, said winder
forming said polyethylene strip into a first roll; an unwind stand,
said unwind stand controllably dispensing said polyethylene strip
from said first roll; a second extruder, said second extruder
forming a continuous sheet of polyethylene material, said sheet
having a first edge and a second edge; a sheet folder, said sheet
folder forming said sheet along a longitudinal axis to form a
continuous pocket having a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer; a first
perforator, said first perforator perforating at least one of said
top layer and said bottom layer parallel and adjacent to said open
top to form an attached header strip; a second printer, said second
printer marking a plurality of second alignment indicators on said
outer surface; a second perforator, said second perforator
perforating said strip into serial groupings of first end sections,
detachable center sections and second end sections; a tractor, said
tractor pulling said strip from said first roll disposed upon said
unwind stand and disposing a portion of said strip orthogonally
over said pocket; a first sensor, said first sensor detecting said
first alignment indicator on said strip; a second sensor, said
second sensor detecting said second alignment indicator on said
outer surface of said pocket; a controller, said controller being
connected to said first and second sensors and aligning one of said
first alignment indicators with one of said second alignment
indicators; a sealer, said sealer sealing said first end section of
said portion of said strip to said outer surface on said top layer
and sealing said top layer to said bottom layer, forming a first
side seam, sealing said second end section of said portion of said
strip to said outer surface on said top layer and sealing said top
layer to said bottom layer, thereby forming a second side seam; and
a cutter, said cutter cutting a finished bag from said continuous
pocket.
Description
FIELD OF INVENTION
[0001] The invention pertains to plastic bags with promotional
strips. More particularly, the invention relates to side seam bags
with one or more promotional strips registered between the bag side
seams.
BACKGROUND OF THE INVENTION
[0002] Plastic bags with promotional or advertising strips attached
to the bags permit a different model for the sale and use of
plastic bags in grocery and retail establishments. By selling the
advertising space on the strips, the revenue generated is often
sufficient to more than cover the cost of providing the bags to
customers. Previous designs for bags with attached promotional
strips have had several problems. A first problem relates to
promotional strips used to display coupons. These coupons must be
severed from the bags to be redeemed. Early bags required the use
of a scissors or knife for this purpose, resulting in low coupon
usage and consequently low revenues associated with such bags. A
second problem relates to the registration of the coupons to the
bags. If the coupons are not registered to the bags, advertisers
are not willing to pay for advertising on all of the coupons as a
number would be cut off when joined to a bag edge. A third problem
relates to the visibility of the coupons. When the coupons are
placed in a bag gusset, they are less visible to the customer.
[0003] Various designs for bag and advertising or promotional
systems have been developed to addresses these problems. U.S. Pat.
No. 6,536,951, issued to Sill, discloses a plastic bag that
includes first and second opposing body panels fixedly connected to
each other along a pair of sides and a bottom bridging the pair of
sides to form a receptacle space having a mouth formed opposite the
bottom. The plastic bag also includes a reclosable fastener
extending along said mouth and an overlay strip fixedly connected
to the body panels at the sides of the body panel. The overlay
strip overlays at least a portion of the body panels and extends
beyond the body panels. The overlay strip preferably includes a
header portion having at least one opening for mounting the plastic
bag to a dispensing post, and a perforation line such that the
header is removable from the remainder of the overlay strip. The
overlay strip can also have at least one advertisement and/or at
least one coupon with perforation lines such that the coupon is
removable from the remainder of the overlay strip.
[0004] U.S. Pat. No. 5,035,515, issued to Crossman et al. describes
a packaging comprising a pocket made of sheet material, the pocket
defining an enclosure for holding merchandise and having at least
one sealed edge. One or more detachable compartments are formed by
extensions of the sheet material beyond the at least one sealed
edge. A seal along at least one edge of the extensions closes the
compartment. A promotional message is carried by the detachable
compartment, and a perforation line extends parallel to the at
least one sealed edge of the pocket on each compartment side
thereof to make the compartment detachable from the pocket by a
consumer. The extensions are folded back towards the sealed edge to
form at least one sheet of the sheet material enclosed by the
compartment. The pocket remains functional when the compartment is
detached.
[0005] U.S. Pat. No. 4,909,636, issued to DeMatteis et al.
discloses a plastic grocery bag is provided with a tear-off coupon.
The coupon is configured with the rest of the bag for rapid
production and easy detachment from the bag. The plastic bag is
fabricated from tubes of blown plastic. The tube is first collapsed
and printed and thereafter folded at the side edges to form two "W"
shaped folds along the bag sides. These folds permit the bag, when
expanded, to accommodate the required containment volume. As a next
step, the folded tube is both heat-sealed and cut to form sealed
incremental folded tubes. These tubes are in turn cut at the bottom
to form the bottom of the bag and at the top to form the paired
handles on either side of an opening, which handles are
characteristic of the T-shirt bag. Centrally of the top of the two
handles, and for the purpose of holding a group of such bags
together, there is configured on the forward wall and rearward wall
of each bag a tab. When numerous bags overlie one another, the tabs
of all the overlying bags may be joined together into a wicket.
This wicket holds the overlying bags stacked as a group together.
This wicket also allows the bags to be serially opened and filled
with merchandise, typically at a check stand. The improved coupon
of this bag is configured from material that would otherwise be cut
from the vicinity of the bag opening when it is formed.
Specifically, the coupon is printed and cut for placement between
the folded "W" folds at the sides. The coupon is configured so as
not to interfere with the tab. With these positioning constraints,
the coupon is placed for each detachment by either a packing clerk
or the toting shopper without otherwise damaging or interfering
with overall functionality of the bag.
[0006] U.S. Pat. No. 5,011,466, issued to DeMatteis et al.
describes A T-shirt type grocery bag having a tear-off coupon
provided during manufacture. An endless tube of blown thermoplastic
is collapsed and printed, including printing for the coupon
indicia. The bag is "W" folded forming side for the to-be-formed
bag. The folded tube is heat sealed and cut, forming sealed
incremental folded tubes. Cutting operations form a bag bottom and
produce paired handles on opposing sides of an opening. The
definition of this opening also provides a coupon proximate the bag
opening. Preferably, the coupon formed lies between the W-folds and
its orientation does not permit interference with a bag dispensing
structure, such as tabs and wickets. Other embodiments include
coupons for thermoplastic bags lacking paired handles and coupons
for bags lacking some of the dispensing structures.
[0007] It is an objective of the present invention to provide a
side seam bag with at least one promotional strip attached to the
side seams of the bag. It is a further objective to provide a bag
with promotional strips that are perforated for easy removal from
the bag. It is a still further objective of the invention to
provide a side seam bag with promotional strips containing coupons
registered to the side seams of the bag. Finally, it is an
objective of the invention to provide such bags that are simple and
economical to produce and are strong enough for use with heavy
loads of groceries or other retail purchases.
[0008] While some of the objectives of the present invention are
disclosed in the prior art, none of the inventions found include
all of the requirements identified.
SUMMARY OF THE INVENTION
[0009] The present invention addresses all of the deficiencies of
prior art bag with advertising strip inventions and satisfies all
of the objectives described above.
[0010] (1) A side seam polyethylene bag with registered,
perforated, promotional strips having all of the desired features
includes front and rear bag walls. Each of the walls has a top
edge, first and second side edges and a bottom edge. The bottom
edge of the front wall is joined to the bottom edge of the rear
wall. The first side edges of the front and rear bag walls are
joined at a first side seam and the second side edges of the front
and rear bag walls are joined at a second side seam. At least one
promotional strip is provided. The promotional strip has a first
end section, at least one detachable center section, a second end
section, an upper surface, a lower surface, an upper edge and a
lower edge.
[0011] The first and second end sections are removably attached to
the at least one center section with perforations. The promotional
strip is attached at the first and second end sections to the first
and second side seams, respectively. The at least one detachable
center section has at least one promotional message printed on at
least one of the upper surface and the lower surface of the strip.
The promotional message is registered to the strip so that all of
the message is located between the perforations. When the
detachable center section is removed from the first and second end
sections, it will comprise at least one complete promotional
message.
[0012] (2) In a variant of the invention, the promotional strip has
horizontal perforations along at least one of the upper edge and
the lower edge. The horizontal perforations removably attach at
least one additional promotional strip to the at least one
promotional strip. The at least one additional promotional strip
has a first end section, at least one detachable center section, a
second end section, an upper surface, a lower surface, an upper
edge and a lower edge. The first and second end sections are
removably attached to the at least one center section with
perforations. The additional promotional strip is attached at the
first and second end sections to the first and second side seams,
respectively.
[0013] The at least one detachable center section has at least one
promotional message printed on at least one of the upper surface
and the lower surface of the strip. The promotional message is
registered to the additional promotional strip so that all of the
message is located between the perforations. When the detachable
center section of the additional promotional strip is removed from
the first and second end sections, it will have at least one
complete promotional message.
[0014] (3) In another variant, a side seam perforation is provided.
The side seam perforation removably attaches the second side seam
of the bag to the first side seam of a subsequent bag. When the
bags include the side seam perforation they are windable into a
compact bag roll.
[0015] (4) In still another variant, at least one additional
perforation is provided. The at least one additional perforation
extends from the upper edge to the lower edge of the promotional
strip. The center section has at least one promotional message
printed on at least one of the upper surface and the lower surface
of the strip. The promotional message is registered to the strip so
that all of the message is located between the perforation and the
additional perforation. When the detachable center section is
removed from the first and second end sections, it will have at
least one complete promotional message.
[0016] (5) In yet another variant, the top edge of at least one of
the front and rear bag walls is attached to a header strip.
[0017] (6) In still another variant, the top edge of at least one
of the front and rear bag walls is attached to said header strip
with a perforation.
[0018] (7) In a further variant, a plurality of the header strips
are attached together to form a bag pack.
[0019] (8) A method of making a side seam polyethylene bag with
registered, perforated, promotional strips includes the following
steps. Extruding a continuous strip of polyethylene material. The
polyethylene strip has an upper edge, a lower edge, an upper
surface and a lower surface. Printing a plurality of promotional
messages and a plurality of first alignment indicators upon the
upper surface of the polyethylene strip. Winding the continuous
strip into a first roll. Extruding a continuous sheet of
polyethylene material. The sheet has a first edge and a second
edge. Folding the sheet along a longitudinal axis to form a
continuous pocket. The pocket has a closed bottom, an open top, an
inner surface, an outer surface, a top layer and a bottom layer.
Printing a plurality of second alignment indicators on the outer
surface. Unwinding the strip from the roll.
[0020] Perforating the strip into serial groupings of first end
sections, detachable center sections and second end sections.
Locating a portion of the strip orthogonally over the pocket.
Aligning one of the first alignment indicators with one of the
second alignment indicators. Sealing the first end section of the
portion of the strip to the outer surface on the top layer and
sealing the top layer to the bottom layer, thereby forming a first
side seam. Sealing the second end section of the strip to the outer
surface on the top layer and sealing the top layer to the bottom
layer, thereby forming a second side seam. Cutting a finished bag
from the continuous pocket.
[0021] (9) In a variant of the invention, a method of making a side
seam polyethylene bag with registered, perforated, promotional
strips includes the following steps. Extruding a continuous strip
of polyethylene material. The polyethylene strip has an upper edge,
a lower edge, an upper surface and a lower surface. Printing a
plurality of promotional messages and a plurality of first
alignment indicators upon the upper surface of the polyethylene
strip. Perforating the strip into serial groupings of first end
sections, detachable center sections and second end sections.
Winding the continuous strip into a first roll.
[0022] Extruding a continuous sheet of polyethylene material. The
sheet has a first edge and a second edge. Folding the sheet along a
longitudinal axis to form a continuous pocket that has a closed
bottom, an open top, an inner surface, an outer surface, a top
layer and a bottom layer. Printing a plurality of second alignment
indicators on the outer surface. Unwinding the strip from the roll.
Locating a portion of the strip orthogonally over the pocket.
Aligning one of the first alignment indicators with one of the
second alignment indicators. Sealing the first end section of the
portion of the strip to the outer surface on the top layer and
sealing the top layer to the bottom layer, forming a first side
seam. Sealing the second end section of the portion of the strip to
the outer surface on the top layer and sealing the top layer to the
bottom layer, forming a second side seam and thereby forming a
finished bag. Forming a perforation between the second side seam of
a first bag and the first side seam of a subsequent bag. Rolling
the bags into a compact roll.
[0023] (10) A method of making a side seam polyethylene bag with
registered, perforated, promotional strips includes the following
steps. Extruding a continuous strip of polyethylene material. The
polyethylene strip has an upper edge, a lower edge, an upper
surface and a lower surface. Printing a plurality of promotional
messages and a plurality of first alignment indicators upon the
upper surface of the polyethylene strip. Winding the continuous
strip into a first roll. Extruding a continuous sheet of
polyethylene material. The sheet has a first edge and a second
edge. Folding the sheet along a longitudinal axis to form a
continuous pocket that has a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer.
Perforating at least one of the top layer and the bottom layer
parallel and adjacent to the open top to form an attached header
strip.
[0024] Printing a plurality of second alignment indicators on the
outer surface. Unwinding the strip from the roll. Perforating the
strip into serial groupings of first end sections, detachable
center sections and second end sections. Locating a portion of the
strip orthogonally over the pocket. Aligning one of the first
alignment indicators with one of the second alignment indicators.
Sealing the first end section of the portion of the strip to the
outer surface on the top layer and sealing the top layer to the
bottom layer, thereby forming a first side seam. Sealing the second
end section of the portion of the strip to the outer surface on the
top layer and sealing the top layer to the bottom layer, thereby
forming a second side seam. Cutting a finished bag from the
continuous pocket.
[0025] (11) An apparatus for making a side seam polyethylene bag
with registered, perforated, promotional strips includes a supply
of polyethylene material. A first extruder is provided. The first
extruder forms a continuous polyethylene strip. The strip has an
upper edge, a lower edge, an upper surface and a lower surface. A
first printer is provided. The first printer marks a plurality of
promotional messages and a plurality of first alignment indicators
upon the upper surface of the polyethylene strip. A winder is
provided. The winder forms the polyethylene strip into a first
roll. An unwind stand is provided. The unwind stand controllably
dispenses the polyethylene strip from the first roll.
[0026] A second extruder is provided. The second extruder forms a
continuous sheet of polyethylene material. The sheet has a first
edge and a second edge. A sheet folder is provided. The sheet
folder forms the sheet along a longitudinal axis to form a
continuous pocket. The pocket has a closed bottom, an open top, an
inner surface, an outer surface, a top layer and a bottom layer. A
second printer is provided. The second printer marks a plurality of
second alignment indicators on the outer surface. A first
perforator is provided. The first perforator perforates the strip
into serial groupings of first end sections, detachable center
sections and second end sections. A tractor is provided. The
tractor pulls the strip from the first roll located upon the unwind
stand and locates a portion of the strip orthogonally over the
pocket.
[0027] A first sensor is provided. The first sensor detects the
first alignment indicator on the strip. A second sensor is
provided. The second sensor detects the second alignment indicator
on the outer surface of the pocket. A controller is provided. The
controller is connected to the first and second sensors and aligns
one of the first alignment indicators with one of the second
alignment indicators. A sealer is provided. The sealer seals the
first end section of the portion of the strip to the outer surface
on the top layer and seals the top layer to the bottom layer,
forming a first side seam, seals the second end section of the
portion of the strip to the outer surface on the top layer and
seals the top layer to the bottom layer, thereby forming a second
side seam. A cutter is provided. The cutter cuts a finished bag
from the continuous pocket.
[0028] (12) In a variant of the invention, the controller adjusts
the speed of the unwind stand to align the first alignment
indicator with the second alignment indicator.
[0029] (13) An apparatus for making a side seam polyethylene bag
with registered, perforated, promotional strips includes a supply
of polyethylene material. A first extruder is provided. The first
extruder forms a continuous polyethylene strip. The strip has an
upper edge, a lower edge, an upper surface and a lower surface. A
first printer is provided. The first printer marks a plurality of
promotional messages and a plurality of first alignment indicators
upon the upper surface of the polyethylene strip. A first
perforator is provided. The first perforator perforates the strip
into serial groupings of first end sections, detachable center
sections and second end sections.
[0030] A winder is provided. The winder forms the polyethylene
strip into a first roll. An unwind stand is provided. The unwind
stand controllably dispenses the polyethylene strip from the first
roll. A second extruder is provided. The second extruder forms a
continuous sheet of polyethylene material. The sheet has a first
edge and a second edge. A sheet folder is provided. The sheet
folder forms the sheet along a longitudinal axis to form a
continuous pocket that has a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer. A second
printer is provided. The second printer marks a plurality of second
alignment indicators on the outer surface. A tractor is provided.
The tractor pulls the strip from the first roll located upon the
unwind stand and locates a portion of the strip orthogonally over
the pocket. A first sensor is provided. The first sensor detects
the first alignment indicator on the strip.
[0031] A second sensor is provided. The second sensor detects the
second alignment indicator on the outer surface of the pocket. A
controller is provided. The controller is connected to the first
and second sensors and aligns one of the first alignment indicators
with one of the second alignment indicators. A sealer is provided.
The sealer seals the first end section of the portion of the strip
to the outer surface on the top layer and seals the top layer to
the bottom layer, forming a first side seam, seals the second end
section of the portion of the strip to the outer surface on the top
layer and seals the top layer to the bottom layer, thereby forming
a second side seam. A second perforator is provided. The second
perforator forms a side seam perforation between the second side
seam of a first bag and the first side seam of a subsequent bag. A
roller is provided. The roller rolls the bags into a compact
roll.
[0032] (14) In a variant of the invention, the controller adjusts
the speed of the unwind stand to align the first alignment
indicator with the second alignment indicator.
[0033] (15) In a final variant of the invention an apparatus for
making a side seam polyethylene bag with registered, perforated,
promotional strips includes the following components. A supply of
polyethylene material is provided. A first extruder is provided.
The first extruder forms a continuous polyethylene strip. The strip
has an upper edge, a lower edge, an upper surface and a lower
surface. A first printer is provided. The first printer marks a
plurality of promotional messages and a plurality of first
alignment indicators upon the upper surface of the polyethylene
strip. A winder is provided. The winder forms the polyethylene
strip into a first compact roll. An unwind stand is provided. The
unwind stand controllably dispenses the polyethylene strip from the
first compact roll.
[0034] A second extruder is provided. The second extruder forms a
continuous sheet of polyethylene material. The sheet has a first
edge and a second edge. A sheet folder is provided. The sheet
folder forms the sheet along a longitudinal axis to form a
continuous pocket that has a closed bottom, an open top, an inner
surface, an outer surface, a top layer and a bottom layer. A first
perforator is provided. The first perforator perforates at least
one of the top layer and the bottom layer parallel and adjacent to
the open top to form an attached header strip. A second printer is
provided. The second printer marks a plurality of second alignment
indicators on the outer surface. A second perforator is provided.
The second perforator perforates the strip into serial groupings of
first end sections, detachable center sections and second end
sections. A tractor is provided. The tractor pulls the strip from
the first roll located upon the unwind stand and locates a portion
of the strip orthogonally over the pocket. A first sensor is
provided. The first sensor detects the first alignment indicator on
the strip. A second sensor is provided. The second sensor detects
the second alignment indicator on the outer surface of the
pocket.
[0035] A controller is provided. The controller is connected to the
first and second sensors and aligns one of the first alignment
indicators with one of the second alignment indicators. A sealer is
provided. The sealer seals the first end section of the portion of
the strip to the outer surface on the top layer and sealing the top
layer to the bottom layer, forming a first side seam, sealing the
second end section of the portion of the strip to the outer surface
on the top layer and sealing the top layer to the bottom layer,
thereby forming a second side seam. A cutter is provided. The
cutter cuts a finished bag from the continuous pocket.
[0036] An appreciation of the other aims and objectives of the
present invention and an understanding of it may be achieved by
referring to the accompanying drawings and the detailed description
of a preferred embodiment.
DESCRIPTION OF THE DRAWINGS
[0037] FIG. 1 is a perspective view of the preferred embodiment of
the invention illustrating a single promotional strip;
[0038] FIG. 2 is a perspective view of the FIG. 1 embodiment
illustrating a pair of promotional strips joined by a
perforation;
[0039] FIG. 3 is a perspective view of a series of the FIG. 1 bags
joined on the edges and formed into a bag roll;
[0040] FIG. 4 is a perspective view of an alternative bag with a
header at the upper end;
[0041] FIG. 5 is a perspective view of a registered stack of bags
of the FIG. 4 embodiment;
[0042] FIG. 6 is a perspective view of an apparatus for printing
promotional messages and alignment indicators on a plastic
strip;
[0043] FIG. 7 is a perspective view of an apparatus for folding an
extruded plastic sheet into a pocket and printing alignment
indicators on it;
[0044] FIG. 8 is a perspective view of an apparatus for forming
side seam bags from the folded pocket, registering and attaching
the promotional strip and forming a bag roll;
[0045] FIG. 9 is a perspective view of an apparatus for forming
side seam bags from the folded pocket, registering and attaching
the promotional strip and forming a registered bag pack; and
[0046] FIG. 10 is a perspective view of an apparatus for forming
side seam bags with an attached header strip from the folded
pocket, registering and attaching the promotional strip and forming
a registered bag pack.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0047] (1) FIGS. 1-5 illustrate a side seam polyethylene bag with
registered, perforated, promotional strips 10 having all of the
desired features that may be constructed from the following
components. Front 15 and rear 20 bag walls are provided. Each of
the walls 15, 20 has a top edge 25, first 30 and second 35 side
edges and a bottom edge 40. The bottom edge 40 of the front wall 15
is joined to the bottom edge 40 of the rear wall 20. The first side
edges 30 of the front 15 and rear 20 bag walls are joined at a
first side seam 45 and the second side 35 edges of the front 15 and
rear 20 bag walls are joined at a second side seam 50. At least one
promotional strip 55 is provided. The promotional strip 55 has a
first end section 60, at least one detachable center section 65, a
second end section 70, an upper surface 75, a lower surface 80, an
upper edge 85 and a lower edge 90.
[0048] The first 60 and second 70 end sections are removably
attached to the at least one center section 65 with perforations
95. The promotional strip 55 is attached at the first 60 and second
70 end sections to the first 45 and second 50 side seams,
respectively. The at least one detachable center section 65 has at
least one promotional message 100 printed on at least one of the
upper surface 75 and the lower surface 80 of the strip 55. The
promotional message 100 is registered to the strip 55 so that all
of the message 100 is located between the perforations 95. When the
detachable center section 65 is removed from the first 60 and
second 70 end sections, it will comprise at least one complete
promotional message 100.
[0049] (2) In a variant of the invention, as illustrated in FIG. 2,
the promotional strip 55 has horizontal perforations 105 along at
least one of the upper edge 85 and the lower edge 90. The
horizontal perforations 105 removably attach at least one
additional promotional strip 55 to the at least one promotional
strip 55. The at least one additional promotional strip 55 has a
first end section 60, at least one detachable center section 65, a
second end section 70, an upper surface 75, a lower surface 80, an
upper edge 85 and a lower edge 90. The first 60 and second 70 end
sections are removably attached to the at least one center section
65 with perforations 95. The additional promotional strip 55 is
attached at the first 60 and second 70 end sections to the first 45
and second 50 side seams, respectively.
[0050] The at least one detachable center section 65 has at least
one promotional message 100 printed on at least one of the upper
surface 75 and the lower surface 80 of the strip 55. The
promotional message 100 is registered to the additional promotional
strip 55 so that all of the message 100 is located between the
perforations 95. When the detachable center section 65 of the
additional promotional strip 55 is removed from the first 60 and
second 70 end sections, it will have at least one complete
promotional message 100.
[0051] (3) In another variant, as illustrated in FIG. 3, a side
seam perforation 110 is provided. The side seam perforation 110
removably attaches the second side seam 50 of the bag 10 to the
first side seam 45 of a subsequent bag 10. When the bags 10 include
the side seam perforation 110 they are windable into a compact bag
roll 115.
[0052] (4) In still another variant, as illustrated in FIG. 2, at
least one additional perforation 120 provided. The at least one
additional perforation 120 extends from the upper edge 85 to the
lower edge 90 of the promotional strip 55. The center section 65
has at least one promotional message 100 printed on at least one of
the upper surface 75 and the lower surface 80 of the strip 55. The
promotional message 100 is registered to the strip 55 so that all
of the message 100 is located between the perforation 55 and the
additional perforation 120. When the detachable center section 65
is removed from the first 60 and second 70 end sections, it will
have at least one complete promotional message 100.
[0053] (5) In yet another variant, as illustrated in FIGS. 4 and 5,
the top edge 25 of at least one of the front 15 and rear 20 bag
walls is attached to a header strip 125.
[0054] (6) In still another variant, as illustrated in FIGS. 4 and
5, the top edge 25 of at least one of the front 15 and rear 20 bag
walls is attached to said header strip 125 with a perforation
130.
[0055] (7) In a further variant, as illustrated in FIG. 5, a
plurality of the header strips 125 are attached together to form a
bag pack 135.
[0056] (8) A method of making a side seam polyethylene bag with
registered, perforated, promotional strips 10 includes the
following steps, as illustrated in FIG. 6. Extruding a continuous
strip 140 of polyethylene material. The polyethylene strip 140 has
an upper edge 85, a lower edge 90, an upper surface 75 and a lower
surface 80. Printing a plurality of promotional messages 100 and a
plurality of first alignment indicators 145 upon the upper surface
75 of the polyethylene strip 140. Winding the continuous strip 140
into a first roll 150. Extruding a continuous sheet of polyethylene
material 155. As illustrated in FIG. 7, the sheet 155 has a first
edge 160 and a second edge 165. Folding the sheet 155 along a
longitudinal axis 170 to form a continuous pocket 175. The pocket
175 has a closed bottom 180, an open top 185, an inner surface 190
(not shown), an outer surface 195, a top layer 200 and a bottom
layer 205. Printing a plurality of second alignment indicators 210
on the outer surface 195.
[0057] As illustrated in FIG. 9, unwinding the strip 140 from the
roll 150. Perforating the strip 140 into serial groupings 215 of
first end sections 60, detachable center sections 65 and second end
sections 70. Locating a portion 55 of the strip 140 orthogonally
over the pocket 175. Aligning one of the first alignment indicators
145 with one of the second alignment indicators 210. Sealing the
first end section 60 of the portion 55 of the strip 140 to the
outer surface 195 on the top layer 200 and sealing the top layer
200 to the bottom layer 205, thereby forming a first side seam 45.
Sealing the second end section 70 of the portion 55 of the strip
140 to the outer surface 195 on the top layer 200 and sealing the
top layer 200 to the bottom layer 205, thereby forming a second
side seam 50. Cutting a finished bag 10 from the continuous pocket
175.
[0058] (9) In a variant of the invention, as illustrated in FIG. 6,
a method of making a side seam polyethylene bag with registered,
perforated, promotional strips 10, includes the following steps.
Extruding a continuous strip of polyethylene material 140. The
polyethylene strip 140 has an upper edge 85, a lower edge 90, an
upper surface 75 and a lower surface 80. Printing a plurality of
promotional messages 100 and a plurality of first alignment
indicators 145 upon the upper surface 75 of the polyethylene strip
140. Perforating the strip 140 into serial groupings 215 of first
end sections 60, detachable center sections 65 and second end
sections 70. Winding the continuous strip 140 into a first roll
150.
[0059] As illustrated in FIG. 7, extruding a continuous sheet of
polyethylene material 155. The sheet 155 has a first edge 160 and a
second edge 165. Folding the sheet 155 along a longitudinal axis
170 to form a continuous pocket 175 that has a closed bottom 180,
an open top 185, an inner surface 190 (not shown), an outer surface
195, a top layer 200 and a bottom layer 205. Printing a plurality
of second alignment indicators 210 on the outer surface 195.
[0060] As illustrated in FIG. 8, unwinding the strip 140 from the
roll 150. Locating a portion 55 of the strip 140 orthogonally over
the pocket 175. Aligning one of the first alignment indicators 145
with one of the second alignment indicators 210. Sealing the first
end section 60 of the portion 55 of the strip 140 to the outer
surface 195 on the top layer 200 and sealing the top layer 200 to
the bottom layer 205, forming a first side seam 45. Sealing the
second end section 70 of the portion 55 of the strip 140 to the
outer surface 195 on the top layer 200 and sealing the top layer
200 to the bottom layer 205, forming a second side seam 50 and
thereby forming a finished bag 10. Forming a perforation 110
between the second side seam 50 of a first bag 10 and the first
side seam 45 of a subsequent bag 10. Rolling the bags 10 into a
compact roll 115.
[0061] (10) A method of making a side seam polyethylene bag with
registered, perforated, promotional strips 10 includes the
following steps. As illustrated in FIG. 6, extruding a continuous
strip of polyethylene material 140. The polyethylene strip 140 has
an upper edge 85, a lower edge 90, an upper surface 75 and a lower
surface 80. Printing a plurality of promotional messages 100 and a
plurality of first alignment indicators 145 upon the upper surface
75 of the polyethylene strip 140. Winding the continuous strip 140
into a first roll 150.
[0062] As illustrated in FIG. 7, extruding a continuous sheet of
polyethylene material 155. The sheet 155 has a first edge 160 and a
second edge 165. Folding the sheet 155 along a longitudinal axis
170 to form a continuous pocket 175 that has a closed bottom 180,
an open top 185, an inner surface 190, an outer surface 195, a top
layer 200 and a bottom layer 205. Printing a plurality of second
alignment indicators 210 on the outer surface 195.
[0063] As illustrated in FIG. 10 perforating at least one of the
top layer 200 and the bottom layer 205 parallel and adjacent to the
open top 185 to form an attached header strip 125. Unwinding the
strip 140 from the roll 150. Perforating the strip 140 into serial
groupings 215 of first end sections 60, detachable center sections
65 and second end sections 70. Locating a portion 55 of the strip
140 orthogonally over the pocket 175. Aligning one of the first
alignment indicators 145 with one of the second alignment
indicators 210. Sealing the first end section 60 of the portion 55
of the strip 140 to the outer surface 195 on the top layer 200 and
sealing the top layer 200 to the bottom layer 205, thereby forming
a first side seam 45. Sealing the second end section 70 of the
portion 55 of the strip 140 to the outer surface 195 on the top
layer 200 and sealing the top layer 200 to the bottom layer 205,
thereby forming a second side seam 50. Cutting a finished bag 10
from the continuous pocket 175.
[0064] (11) As illustrated in FIG. 6, an apparatus for making a
side seam polyethylene bag with registered, perforated, promotional
strips 225, includes a supply of polyethylene material 230. A first
extruder 240 is provided. The first extruder 240 forms a continuous
polyethylene strip 140. The strip has an upper edge 85, a lower
edge 90, an upper surface 75 and a lower surface 80. A first
printer 245 is provided. The first printer 245 marks a plurality of
promotional messages 100 and a plurality of first alignment
indicators 145 upon the upper surface 75 of the polyethylene strip
140. A winder 250 is provided. The winder 250 forms the
polyethylene strip 140 into a first roll 150.
[0065] As illustrated in FIG. 7, a second extruder 260 is provided.
The second extruder 260 forms a continuous sheet of polyethylene
material 155. The sheet 155 has a first edge 160 and a second edge
165. A sheet folder 265 is provided. The sheet folder 265 forms the
sheet 155 along a longitudinal axis 170 to form a continuous pocket
175. The pocket 175 has a closed bottom 180, an open top 185, an
inner surface 190, an outer surface 195, a top layer 200 and a
bottom layer 205. A second printer 270 is provided. The second
printer 270 marks a plurality of second alignment indicators 210 on
the outer surface. As illustrated in FIG. 9, an unwind stand 255 is
provided. The unwind stand 255 controllably dispenses the
polyethylene strip 140 from the first roll 150. A first perforator
275 is provided. The first perforator 275 perforates the strip 140
into serial groupings 215 of first end sections 60, detachable
center sections 65 and second end sections 70. A tractor 280 is
provided. The tractor 280 pulls the strip 140 from the first roll
150 located upon the unwind stand 255 and locates a portion 55 of
the strip 140 orthogonally over the pocket 175.
[0066] A first sensor 285 is provided. The first sensor 285 detects
the first alignment indicator 145 on the strip 140. A second sensor
290 is provided. The second sensor 290 detects the second alignment
indicator 210 on the outer surface 195 of the pocket 175. A
controller 295 is provided. The controller 295 is connected to the
first 285 and second 290 sensors and aligns one of the first
alignment indicators 145 with one of the second alignment
indicators 210. A sealer 300 is provided. The sealer 300 seals the
first end section 60 of the portion 55 of the strip 140 to the
outer surface 195 on the top layer 200 and seals the top layer 200
to the bottom layer 205, forming a first side seam 45, seals the
second end section 70 of the portion 55 of the strip 140 to the
outer surface 195 on the top layer 200 and seals the top layer 200
to the bottom layer 205, thereby forming a second side seam 50. A
cutter 305 is provided. The cutter 305 cuts a finished bag 10 from
the continuous pocket 175.
[0067] (12) In a variant of the invention, as illustrated in FIGS.
8, 9 and 10, the controller 295 adjusts the speed of the unwind
stand 255 to align the first alignment indicator 145 with the
second alignment indicator 210.
[0068] (13) An apparatus for making a side seam polyethylene bag
with registered, perforated, promotional strips 225 includes a
supply of polyethylene material 230, as illustrated in FIG. 6. A
first extruder 240 is provided. The first extruder 240 forms a
continuous polyethylene strip 140. The strip 140 has an upper edge
85, a lower edge 90, an upper surface 75 and a lower surface 80. A
first printer 245 is provided. The first printer 245 marks a
plurality of promotional messages 100 and a plurality of first
alignment indicators 145 upon the upper surface 75 of the
polyethylene strip 140. A winder 250 is provided. The winder 250
forms the polyethylene strip 140 into a first roll 150. As
illustrated in FIG. 7, a second extruder 260 is provided. The
second extruder 260 forms a continuous sheet of polyethylene
material 155. The sheet 155 has a first edge 160 and a second edge
165. A sheet folder 265 is provided. The sheet folder 265 forms the
sheet 155 along a longitudinal axis 170 to form a continuous pocket
175 that has a closed bottom 180, an open top 185, an inner surface
190 (not shown), an outer surface 195, a top layer 200 and a bottom
layer 205. A second printer 270 is provided. The second printer 270
marks a plurality of second alignment indicators 210 on the outer
surface 195.
[0069] As illustrated in FIG. 8, an unwind stand 255 is provided.
The unwind stand 255 controllably dispenses the polyethylene strip
140 from the first roll 150. A tractor 280 is provided. The tractor
280 pulls the strip 140 from the first roll 150 located upon the
unwind stand 255 and locates a portion 55 of the strip 140
orthogonally over the pocket 175. A first perforator 275 is
provided. The first perforator 275 perforates the strip 140 into
serial groupings 215 of first end sections 60, detachable center
sections 65 and second end sections 70. A first sensor 285 is
provided. The first sensor 285 detects the first alignment
indicator 145 on the strip 140. A second sensor 290 is provided.
The second sensor 290 detects the second alignment indicator 210 on
the outer surface 195 of the pocket 175. A controller 295 is
provided. The controller 295 is connected to the first 285 and
second 290 sensors and aligns one of the first alignment indicators
145 with one of the second alignment indicators 210. A sealer 300
is provided. The sealer 300 seals the first end section 60 of the
portion 55 of the strip 140 to the outer surface 195 on the top
layer 200 and seals the top layer 200 to the bottom layer 205,
forming a first side seam 45, seals the second end section 70 of
the portion 55 of the strip 140 to the outer surface 195 on the top
layer 200 and seals the top layer 200 to the bottom layer 205,
thereby forming a second side seam 50. A second perforator 310 is
provided. The second perforator 310 forms a side seam perforation
110 between the second side seam 50 of a first bag 10 and the first
side seam 45 of a subsequent bag 10. A roller 315 is provided. The
roller 315 rolls the bags 10 into a compact roll 115.
[0070] (14) In a variant of the invention, as illustrated in FIGS.
8, 9, and 10, the controller 295 adjusts the speed of the unwind
stand 255 to align the first alignment indicator 145 with the
second alignment indicator 210.
[0071] (15) In a final variant of the invention, as illustrated in
FIG. 6, an apparatus for making a side seam polyethylene bag with
registered, perforated, promotional strips 225 includes the
following components. A supply of polyethylene material 230 is
provided. A first extruder 240 is provided. The first extruder 240
forms a continuous polyethylene strip 140. The strip 140 has an
upper edge 85, a lower edge 90, an upper surface 75 and a lower
surface 80. A first printer 245 is provided. The first printer 245
marks a plurality of promotional messages 100 and a plurality of
first alignment indicators 145 upon the upper surface 75 of the
polyethylene strip 140. A winder 250 is provided. The winder 250
forms the polyethylene strip 140 into a first roll 150.
[0072] As illustrated in FIG. 7, a second extruder 260 is provided.
The second extruder 260 forms a continuous sheet of polyethylene
material 155. The sheet 155 has a first edge 160 and a second edge
165. A sheet folder 265 is provided. The sheet folder 265 forms the
sheet 155 along a longitudinal axis 170 to form a continuous pocket
175 that has a closed bottom 180, an open top 185, an inner surface
190 (not shown), an outer surface 195, a top layer 200 and a bottom
layer 205.
[0073] As illustrated in FIG. 10, a first perforator 320 is
provided. The first perforator 320 perforates at least one of the
top layer 200 and the bottom layer 205 parallel and adjacent to the
open top 185 to form an attached header strip 125. A second printer
270 is provided. The second printer 270 marks a plurality of second
alignment indicators 210 on the outer surface 195. An unwind stand
255 is provided. The unwind stand 255 controllably dispenses the
polyethylene strip 140 from the first roll 150. A second perforator
325 is provided. The second perforator 325 perforates the strip 140
into serial groupings 215 of first end sections 60, detachable
center sections 65 and second end sections 70. A tractor 280 is
provided. The tractor 280 pulls the strip 140 from the first roll
150 located upon the unwind stand 255 and locates a portion 55 of
the strip 140 orthogonally over the pocket 175. A first sensor 285
is provided. The first sensor 285 detects the first alignment
indicator 145 on the strip 140. A second sensor 290 is provided.
The second sensor 290 detects the second alignment indicator 210 on
the outer surface 195 of the pocket 175. A controller 295 is
provided. The controller 295 is connected to the first 285 and
second 290 sensors and aligns one of the first alignment indicators
145 with one of the second alignment indicators 210. A sealer 300
is provided. The sealer 300 seals the first end section 60 of the
portion 55 of the strip 140 to the outer surface 195 on the top
layer 200 and sealing the top layer 200 to the bottom layer 205,
forming a first side seam 45, sealing the second end section 70 of
the portion 55 of the strip 140 to the outer surface 195 on the top
layer 200 and sealing the top layer 200 to the bottom layer 205,
thereby forming a second side seam 50. A cutter 305 is provided.
The cutter 305 cuts a finished bag 10 from the continuous pocket
175.
[0074] The side seam polyethylene bag with registered, perforated,
promotional strips 10 and apparatus for making same 225 has been
described with reference to particular embodiments. Other
modifications and enhancements can be made without departing from
the spirit and scope of the claims that follow.
* * * * *