U.S. patent application number 10/051095 was filed with the patent office on 2003-07-24 for plastic bag dispenser and manufacturing method thereof.
Invention is credited to Chen, Chih-Shen.
Application Number | 20030136793 10/051095 |
Document ID | / |
Family ID | 21969305 |
Filed Date | 2003-07-24 |
United States Patent
Application |
20030136793 |
Kind Code |
A1 |
Chen, Chih-Shen |
July 24, 2003 |
Plastic bag dispenser and manufacturing method thereof
Abstract
The invention is to provide a plastic bag dispenser comprising a
parallelepiped container having an opening assembly on top, and a
stack of a plurality of plastic bags received in the container each
including an opening at a front side, a closed end at a rear side,
and an adhesive on top near the opening of each bag for sticking to
a next below bag wherein the closed ends are bent downward toward
the openings of the bags so as to form a bent section at underside
of the stack. Thus, user can exert a small force to pull one bag
from the container through the opening assembly without worrying of
pulling two or more bags at one time.
Inventors: |
Chen, Chih-Shen; (Houston,
TX) |
Correspondence
Address: |
BACON & THOMAS, PLLC
625 SLATERS LANE
FOURTH FLOOR
ALEXANDRIA
VA
22314
|
Family ID: |
21969305 |
Appl. No.: |
10/051095 |
Filed: |
January 22, 2002 |
Current U.S.
Class: |
221/63 |
Current CPC
Class: |
B65D 83/0805 20130101;
B65D 33/001 20130101 |
Class at
Publication: |
221/63 |
International
Class: |
B65H 001/00 |
Claims
What is claimed is:
1. A plastic bag dispenser comprises: a container having an opening
assembly on top, a stack of plastic bags placed within the
container, which comprises a plurality of plastic bags each
including an opening at a front side, a closed end at a rear side,
two folded sections at both sides between the front and the rear
sides wherein each folded section is folded symmetrically inward,
and an adhesive on top near the opening of the bag for sticking to
a next below bag wherein the closed ends are bent downward toward
the openings of the bags so as to form a bent section at underside
of the stack.
2. The plastic bag dispenser of claim 1, wherein the opening
assembly comprises a widthwise opening near one side above the bent
section, a central lengthwise opening extended from and
perpendicular to the widthwise opening, and a flared opening
extended from the widthwise opening to the position above the
openings of the bags.
3. The plastic bag dispenser of claim 1, wherein the bag further
comprises a wrinkled area on top near the opening thereof with the
adhesive applied on the wrinkled area for adhering two adjacent
bags together.
4. A process of manufacturing a plastic bag dispenser, the process
comprising the steps of: (a) applying an adhesive on top of the bag
near an opening thereof; (b) continuing step (a) until a
predetermined plurality of bags have been processed; (c) stacking
the bags with the openings thereof oriented the same direction for
forming a stack of plastic bags; (d) bending closed ends of the
bags downward toward the openings thereof so as to form a bent
section at underside of the stack of plastic bags; and (e) placing
the stack of plastic bags into a receiving space of a container
through a top opening assembly of the container.
5. The process of claim 4, wherein the opening assembly comprises a
widthwise opening near one side, a central lengthwise opening
extended from and perpendicular to the widthwise opening, and a
flared opening extended from the lengthwise opening so that after
step (e) has been performed the widthwise opening is above the bent
section and flared opening is above the openings of the bags.
6. The process of claim 4, wherein before step (a) is performed
further comprising steps of forming a wrinkled area on top of the
bag near the opening thereof by performing a polarization treatment
by means of a corona discharge device; and applying the adhesive on
the wrinkled area.
7. The process of claim 4, wherein after step (b) has been
performed further comprising the step of bending about one third
portion of the plastic bag dispenser from the closed ends of the
bags downward about 180 degrees toward the openings of the bags so
as to form a bent section at underside of the stack of plastic
bags.
8. The process of claim 4, wherein an amount of the applied
adhesive is about 2 mm.sup.3.
9. The process of claim 4, wherein a manufacturing process of the
plastic bag comprising the steps of: (1) pulling a continuous tube
like plastic film a predetermined length from a source wherein the
plastic film has both sides being inward folded symmetrically; (2)
melting and sealing a rear side of the pulled plastic film by a
sealing device for forming a sealed end; and (3) cutting the pulled
plastic film from the source at the sealed end for forming a
plastic bag wherein the bag comprises an opening at a front side, a
closed end on the sealed end, and two inward folded sections at
both sides between the front and the rear sides.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to plastic bags and more
particularly to a plastic bag dispenser and manufacturing method
thereof.
BACKGROUND OF THE INVENTION
[0002] Petrochemical industry has been well developed during these
several decades. Various products including many used in daily life
are made from plastic. It brings a great convenience to people. One
type of plastic product is plastic bag for containing objects.
Plastic bags have many different shapes and sizes in
implementation. Also, not only quality and appearance but also
convenience and ergonomic design are factors under consideration in
choosing a desired plastic bag by consumers. As such, there is a
need for plastic bag manufacturers to fulfil such needs of
consumers in order to survive in the competitive market.
[0003] In one implementation, for example, plastic bags are hung in
a roll by a vegetable stand in supermarket. People may pull the
plastic bag roll for a desired length prior to tearing one or more
plastic bags therefrom. In fact, however, it is often that people
may tear several plastic bags in one tearing, i.e., the number of
removed plastic bags larger than the desired one. Further, opening
of plastic bag is not easy to open. It really bothers consumers.
Furthermore, unopened plastic bags are useless, i.e., it is a
waste. Thus improvement exists.
SUMMARY OF THE INVENTION
[0004] It is therefore an object of the present invention to
provide a plastic bag dispenser comprising a parallelepiped
container having an opening assembly on top, and a stack of a
plurality of plastic bags received in the container each including
an opening at a front side, a closed end at a rear side, two folded
sections at both sides between the front and the rear sides wherein
each folded section is folded symmetrically inward, and an adhesive
on top near the opening of the bag for sticking to a next below bag
wherein the closed ends are bent downward toward the openings of
the bags so as to form a bent section at underside of the stack of
plastic bags. In use, user can exert a small force to pull one bag
from the container through the opening assembly without worrying of
pulling two or more bags at one time since the adhesive force of
adhesive is suitably small so that the adhesive force of adhesive
only allows top halves of both folded sections and opening of the
next below bag to be exposed on top of the container as folded
sections of the next below bag being stopped in the opening
assembly while one bag on the top being removed.
[0005] It is therefore an object of the present invention to
provide a process of manufacturing a plastic bag dispenser, the
process comprising the steps of (a) applying an adhesive on top of
the bag near an opening thereof; (b) continuing step (a) until a
predetermined plurality of bags have been processed; (c) stacking
the bags with the openings thereof oriented the same for forming a
stack of plastic bags; (d) bending closed ends of the bags downward
toward the openings thereof so as to form a bent section at
underside of the stack of plastic bags; and (e) placing the stack
of plastic bags into a receiving space of a container through a top
opening assembly of the container.
[0006] In one aspect of the present invention, the opening assembly
comprises a widthwise opening near one side above the bent section,
a central lengthwise opening extended from and perpendicular to the
widthwise opening, and a flared opening extended from the
lengthwise opening to the position above the openings of the bags.
In use, user pulls a top bag up by holding the opening thereof.
Thus, the bag is exposed above container as it has been drawn from
the flared, the lengthwise, and the widthwise openings. After the
adhesive on the bag is disengaged from a next below bag, the bag
has been completely removed with the opening in an open state. At
this time, top halves of both folded sections and opening of the
next below bag are exposed on top of container as folded sections
of the next below bag being stopped in the lengthwise opening while
one bag on the top being removed. User does not need to worry about
pulling two or more bags at one time since the adhesive force of
adhesive is suitably small.
[0007] The above and other objects, features and advantages of the
present invention will become apparent from the following detailed
description taken with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a schematic perspective view of a stack of plastic
bags placed in a paper container according to the invention;
[0009] FIG. 2 is a perspective view of several plastic bags partly
disengaged;
[0010] FIG. 3 is a perspective view showing one bag on the top
being removed from the paper container;
[0011] FIG. 4 is side view in part section showing one bag on the
top being removed from the paper container;
[0012] FIG. 5 is a perspective view showing an almost removed
plastic bag and a next plastic bag partly exposed on the paper
container; and
[0013] FIG. 6 is a cross-sectional view showing an adhesive adhered
between two adjacent plastic bags.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0014] Referring to FIGS. 1 and 2, there is shown a plastic bag
dispenser comprising a parallelepiped paper container 1 and a stack
of plastic bags 2 within the container 1 in accordance with the
invention. The stack of plastic bags 2 consists of a plurality of
plastic bags 20. Each bag 20 comprises an opening 201 at a front
side, a closed end 202 at a rear side, two folded sections 203 at
both sides between front and rear sides wherein each folded section
203 is folded symmetrically inward, and an adhesive 3 on top near
opening 201 for sticking to a next below bag 20. Closed ends 202
are bent downward about 180 degrees toward openings 201 so as to
form a bent section 21 at underside of the stack of plastic bags 2.
On top of the container 1 there is provided an opening assembly
comprising a widthwise opening 10 above bent section 21, a
lengthwise opening 11 extended therefrom and perpendicular to
widthwise opening 10, and a flared opening 12 extended from one end
of lengthwise opening 11 (i.e., distal from the joint of widthwise
opening 10 and lengthwise opening 11) to the position above
openings 201 of the plastic bags.
[0015] Referring to FIGS. 3 to 5, the removing of a bag 20 from
container 1 will now be described. First pull a bag 20 up by
holding the opening 201 thereof through the flared opening 12 of
the container 1. Thus, the bag 20 is exposed above container 1 as
it has been drawn from flared opening 12, lengthwise opening 11 and
widthwise opening 10 until the bag 20 is completely removed from
widthwise opening 10 (i.e., disengaged from a next below bag 20
which is adhered to the immediately above bag 20 by the adhesive 3)
with the opening 201 in an open state. At this time, top halves of
both folded sections 203 and opening 201 of the next below bag 20
is exposed on top of container 1.
[0016] Referring to FIG. 6, adhesive 3 is applied onto an area on
top of a bag 20 so as to form a film after dried. The adhesive film
is adhered to a next below bag 20. Consumer can exert a small force
to pull one bag 20 from container 1 through the opening assembly
without worrying of pulling two or more bags 20 at one time since
the adhesive force of adhesive 3 on such small area is suitably
small. That is, the adhesive force of adhesive 3 only allows top
halves of both folded sections 203 and opening 201 of the next
below bag 20 to be exposed on top of container 1 as folded sections
203 of the next below bag 20 being stopped in lengthwise opening 11
while one bag on the top being removed.
[0017] Referring to FIGS. 1, 2, and 6 again, a manufacturing
process of plastic bag dispenser according to the invention will
now be described.
[0018] First, form a wrinkled area 204 on top of plastic bag 20
near opening 201 by performing a polarization treatment by means of
a corona discharge device. Next, apply an amount about 2 mm.sup.3
of adhesive 3 on wrinkled area 204. Continue the above two steps
until a predetermined plurality of bags 20 have been processed.
Then stack the plurality of bags 20 with openings 201 of all bags
20 oriented the same direction for forming a stack of plastic bags
2. Next, bend about one third portion of the stack 2 from closed
ends of the plastic bags 2 downward about 180 degrees toward
openings 201 thereof so as to form a bent section 21 at underside
of the stack of plastic bags 2. Then place the stack of plastic
bags 2 into a receiving space of the container 1 which has an
opening assembly on top comprising a widthwise opening 10 near one
side above bent section 21, a central lengthwise opening 11
extended from and perpendicular to widthwise opening 10, and a
flared opening 12 extended from one end of lengthwise opening 11
(i.e., distal from the joint of widthwise opening 10 and lengthwise
opening 11) above the openings 201 of the plastic bags 2.
[0019] Moreover, a manufacturing process of plastic bags 20
comprises the following steps. First, pull a continuous tube like
plastic film a predetermined length from a source (not shown)
wherein the plastic film has both sides being inward folded
symmetrically. Next, melt and seal a rear side of the pulled
plastic film by a sealing device for forming a closed end 202. Then
cut the pulled plastic film from the source at the closed end 202
for forming a plastic bag 20. The above three steps are repeated
until a predetermined number of plastic bags 20 are manufactured.
Each bag 20 comprises an opening 201 at a front side, a closed end
202 at a rear side, and two folded sections 203 at both sides
between front and rear sides wherein each folded section 203 is
folded symmetrically inward.
[0020] Referring to FIGS. 2 and 6 again, a forming of adhesive 3 on
bag 20 will now be described. First, form a wrinkled area 204 on
top of plastic bag 20 near opening 201 by performing a polarization
treatment by means of a corona discharge device. Next, apply a
predetermined amount of adhesive 3 on wrinkled area 204 so as to
form a film after dried. Continue above two steps until a
predetermined plurality of bags 20 have been processed. Then stack
the plurality of bags 20 with openings 201 of all bags 20 oriented
the same and each bag 20 (except the last one) is adhered to a next
below bag 20, thereby forming a stack of plastic bags 2. In use,
consumer can exert a small force to pull one bag 20 from container
1 without worrying of pulling two or more bags 20 at one time since
the adhesive force of adhesive 3 on wrinkled area 204 is suitably
small. That is, the adhesive force of adhesive 3 only allows top
halves of both folded sections 203 and opening 201 of the next
below bag 20 to be exposed as folded sections 203 of the next below
bag 20 being stopped in lengthwise opening 11 while one bag 20 on
the top being removed from the paper container.
[0021] While the invention has been described by means of specific
embodiments, numerous modifications and variations could be made
thereto by those skilled in the art without departing from the
scope and spirit of the invention set forth in the claims.
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