U.S. patent number 3,765,615 [Application Number 05/257,613] was granted by the patent office on 1973-10-16 for method and apparatus for severing a web to terminate one roll and initiate winding a new roll.
This patent grant is currently assigned to Eastman Kodak Company. Invention is credited to Walter A. Brink, Thomas G. Hanley.
United States Patent |
3,765,615 |
Brink , et al. |
October 16, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
METHOD AND APPARATUS FOR SEVERING A WEB TO TERMINATE ONE ROLL AND
INITIATE WINDING A NEW ROLL
Abstract
A core onto which a web is to be wound is adapted to be moved
into peripheral engagement with one side of a web support such as a
winding drum or roll over which the web passes. A cutting strip of
polymethylene terephthalate is positioned between spaced portions
of the web and roll, and has a central portion in register with the
web and inclined at an angle to the nip of the core and roll. A
tape having an adhesive surface on both sides is placed on the
surface of the central portion of the strip facing the web. The
strip has leading and trailing end portions extending beyond
respective adjacent edges of the web, and an adhesive tab portion
secured to the leading end portion. When the speed of the core
substantially matches the speed of the roll, the strip is fed
beneath the web directly into the nip formed by the rotating roll
and core. The adhesive tab portion of the strip adheres to the core
end extending past the adjacent edge of the web causing the central
portion of the strip, as it passes through the nip, to adhere to
the web and sever it. The central portion and leading end of the
severed web are wound onto the core along with the tab portion.
Inventors: |
Brink; Walter A. (Rochester,
NY), Hanley; Thomas G. (Rochester, NY) |
Assignee: |
Eastman Kodak Company
(Rochester, NY)
|
Family
ID: |
22977004 |
Appl.
No.: |
05/257,613 |
Filed: |
May 30, 1972 |
Current U.S.
Class: |
242/526.2;
242/532.3; 242/542.3 |
Current CPC
Class: |
B32B
7/06 (20130101); B65H 19/262 (20130101); B32B
7/12 (20130101); B32B 27/36 (20130101); B32B
27/10 (20130101); B65H 19/28 (20130101); B65H
2408/236 (20130101) |
Current International
Class: |
B65H
19/22 (20060101); B65H 19/26 (20060101); B65H
19/28 (20060101); B65h 019/26 (); B65h
019/28 () |
Field of
Search: |
;242/56R,58.5,64,58.1,58.2,74 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mautz; George F.
Assistant Examiner: McCarthy; Edward J.
Claims
I claim:
1. A method for severing a web transported over a web support
member to terminate formation of a first web roll and transfer the
severed leading end onto a rotatable core to form a second web
roll, comprising the steps of:
moving said core and said web support member relative to one
another into peripheral pressure engagement to form a nip through
which the web passes;
rotatably driving said core;
positioning a strip having a tear strength greater than that of the
web in a holding position between spaced portions of the web and
said web support member, with a leading portion of the strip having
an adhesive surface facing said core and extending beyond an
adjacent edge of the web, and a central portion of the strip
substantially in register with the web and arranged at an angle to
said nip; and
feeding said strip from said holding position to a transfer
position in which said strip enters directly into said nip whereby
the leading adhesive portion adheres to said rotating core and said
central portion severs the web along the leading edge of said
central portion and winds the leading end of the severed web and
said central portion onto said core.
2. The method according to claim 1 comprising arranging the leading
adhesive portion substantially parallel to said adjacent edge of
the web.
3. The method according to claim 1 comprising forming the central
portion of the strip of polyethylene terephthalate material of one
width, and adhering to the surface of said central portion facing
the web a tape of a width no greater than said one width and having
adhesive on each side thereof.
4. The method according to claim 1 comprising the step of
releasably securing the strip to a flexible support sheet prior to
said strip positioning step.
5. The method according to claim 1 comprising the step of
releasably securing the strip to a flexible support sheet prior to
the strip positioning step, positioning the sheet and strip at the
holding position, and feeding the sheet and strip from said holding
position into the nip.
6. The method according to claim 1 comprising extending the central
portion across the full width of the web.
7. The method according to claim 1 comprising forming said strip
with ends extending past the adjacent edges of the web in said
holding position, and a V-shaped portion substantially in register
with the web and arranged at an angle to the nip.
8. The invention according to claim 1 wherein said web support
member is rotatable, and further including the step of delaying th
strip feeding step until the peripheral speeds of said web support
member and core are substantially equal.
9. In a web winding apparatus having a rotatable surface for
supporting a web fed therein with portions of said surface and web
spaced apart from one another, a rotatable core engageable by said
web supporting surface and adapted to have a new roll wound
thereon, the combination comprising:
means for releasably supporting a web severing strip in a holding
position between spaced apart portions of the web and said web
supporting surface and adjacent the nip formed between said web
supporting surface and core; and
means separate from said core for feeding said strip substantially
directly into said nip whereby the leading end of said strip
adheres to and is wound on said core causing said strip to sever
the web and to wind the leading end of the severed web onto said
core.
10. The invention according to claim 9 wherein said web supporting
surface is a winding drum.
11. In a web winding apparatus having a rotatable web driving drum
over which the web is fed with portions of said drum and web spaced
apart from one another, and wound onto a rotatable first core to
form a first web roll, and a rotatable second core onto which the
web is wound to form a second roll, said second core bieng movable
into peripheral engagement with said driving drum and web thereon
to form a nip therebetween, the combination comprising:
means for releasably supporting a web severing strip in a holding
position between spaced apart portions of said web and drum and
adjacent said nip, said strip having a tab portion extending past
an adjacent edge of the web, and a central portion substantially in
register with the web, said tab and central portions having at
least one adhesive surface on one side thereof; and
means separate from said core for feeding said strip substantially
directly into said nip with a minimum of engagement of the web or
said second core whereby the tab portion of said strip adheres to
and is wound on said second core, and said central portion adheres
to the web causing said strip to sever the web and to wind the
leading end of the severed web onto said second core.
12. The invention according to claim 11 wherein said tab portion of
said strip is substantially parallel to said adjacent edge of the
web, and said central portion of said strip extends across the full
width of the web.
13. The invention according to claim 11 wherein said strip has tab
portions at each end, and a V-shaped central portion interposed
between and connected to said tab portions.
14. The invention according to claim 11 wherein said tab portions
extend beyond respective adjacent edges of the web, and are
substantially parallel to said adjacent edges of the web, and said
V-shaped central portion is in register with and extends across the
web.
15. The invention according to claim 11 wherein said strip
supporting means comprises a flexible sheet to which said strip is
releasably secured, and a table for supporting said flexible
sheet.
16. The invention according to claim 11 wherein said strip
supporting means comprises a flexible sheet to which said strip is
releasably secured, and a table for supporting said flexible sheet,
and said strip feeding means comprises means for moving said table
toward said nip from said holding position to a transfer position,
in which said sheet and strip are fed into said nip.
17. The invention according to claim 11 wherein said tab portion of
said strip has adhesive on the surface facing said second core, and
said central portion of said strip is formed of polyethylene
terephthalate, and a tape having adhesive on each side thereof is
releasably secured to the surface of said central portion facing
the web.
18. The invention according to claim 11 wherein said tab portion of
said strip extends beyond the adjacent edge of the web and has
adhesive on the surface facing said second core, and said central
portion is substantially in register with the web and arranged at
an angle to said nip, said central portion further being formed of
polyethylene terephthalate to which a first tape having adhesive on
each side thereof is releasably secured to the surface of said
central portion facing the web, and a second tape having adhesive
on each side thereof is releasably secured to the opposite surface
of said central portion.
19. The invention according to claim 18 wherein the adhesive
strength with which said tape on the surface of said central
portion facing the web adheres to said central portion is greater
than the adhesive strength with which said tape on the opposite
surface of said central portion adheres to said strip supporting
means.
20. The invention according to claim 11 wherein said strip
supporting means comprises a flexible sheet, and a table for
supporting said flexible sheet, said strip feeding means comprises
means for moving said table toward said nip from said holding
position to a transfer position, in which said sheet and strip are
fed into said nip, and wherein said tab portion of said strip
extends beyond the adjacent edge of the web and has adhesive on the
surface facing said second core, and said central portion is
substantially in register with said web and arranged at an angle to
said nip, said central portion further being formed of polyethylene
terephthalate and having a first tape having adhesive on each side
thereof with one adhesive side releasably secured to the surface of
the central portion facing the web, and a second tape having
adhesive on each side therof releasably secured to the opposite
surface of the central portion for releasably securing said strip
to said flexible sheet, and said adhesive strength of the other
adhesive side of said one tape facing said web is greater than the
adhesive strength with which said second tape secures said strip to
said flexible sheet.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to the winding of webs into rolls,
and more specifically to an improved method and apparatus for
severing a web to terminate one roll, and to transfer the leading
end of the severed web onto a new roll core without stopping the
machine.
2. Description of the Prior Art
Methods and apparatus for severing web material upon completion of
winding of one roll and initiating winding of a new roll without
stopping the machine are generally well known in the art. One such
method involves applying an adhesive surface to the core upon which
the new roll is to be wound, moving the core into engagement with
the web and a web driving drum, and slashing or nicking one edge of
the web to produce a flap or tap which, hopefully, will adhere to
the new core. If the tab portion adheres to the new core, it will
wind onto the core, hopefully tearing the web across its entire
width. More frequently than not, however, the web tears
longitudinally rather than transversely, necessitating stopping the
machine and severing portions from the trailing end of the old web
and the leading end of the new web. Accordingly, this known method
is unreliable and costly due to waste of time and paper.
Another mechanism for severing a web on completion of one roll and
initiating winding of a new roll without stopping the machine is
known throughout the paper industry as the "Pope Reel." One form of
this reel is described in U.S. Pat. No. 1,248,542, and generally
comprises a driving drum over which the web is moved, and a new
core which is moved into peripheral engagement with the drum and
driven thereby. The web is severed along a line just beyond the new
core, and the leading edge thus formed is directed upwardly and
around the core. The directing of the web may be accomplished by
jets of air, water or steam, or may be accomplished by mechanical
manipulation. One form of such mechanical manipulation is disclosed
in U. S. Pat. No. 2,461,246, and involves a cutting strip of felt
or the like having one end secured to a spring clip adjacent one
edge of the web, and a central portion of the strip trained over
the new core adjacent the opposite edge of the web. To initiate
severing the web and transferring the leading edge thus formed onto
the new core, the other end of the cutting strip is wound on a
pulley by a motor causing the strip to move across the web severing
the web and winding it onto the new roll. Similar mechanisms are
also disclosed in U. S. Pat. Nos. 2,343,047 and 3,096,947 utilizing
a cutting wire in which one end of the wire adjacent one edge of
the web is releasably held, and the opposite end of the wire
adjacent the opposite edge of the web is attachable to a new core
by a hook or the like. Still another method and apparatus is
disclosed in U. S. Pat. No. 3,599,888, in which a strip of adhesive
tape is used instead of a cutting wire. A trailing portion of the
tape is wound helically on a rotatable tape bar adjacent to and in
register with the web, and the leading portion of the tape is
manually secured to a new core prior to engagement of the core with
the winding drum. Accordingly, when the core engages the winding
drum and is rotated thereby, the trailing portion of the tape is
released from the tape bar, adheres to the web, severs the web as
it passes through the nip between the core and drum, and winds the
leading end of the severed web onto the core. One disadvantage of
such latter method and apparatus is the necessity to manually
adhere the leading end of the tape to the new core. Furthermore,
due to the difference in speed between the new core and the web
when the core is brought into engagement therewith during the
transfer operation, crimping or creasing of the lead end of the web
occurs as it is wound on the new core. Such creasing distorts and
hence damages subsequent convolutions of web as they are wound on
the core until a sufficient number of convolutions are wound to
smooth out the distortion. The number of feet of web damaged by
such distortions may be considerable, varying with the severity of
the creases and the characteristics of the web. For example, a 2
mil web would produce considerably more impression waste from a
crease than a stiffer 10 mil web. Applicants' invention is believed
to obviate these and other disadvantages of such prior art methods
and apparatus for severing a web to terminate one roll, and
transferring the leading end of the severed web onto a new
roll.
SUMMARY OF THE INVENTION
In accordance with a preferred embodiment of the invention, an
improved and apparatus is provided for severing a web to terminate
one roll, and transferring the leading end of the severed web onto
a core to form a new roll. Such improved method essentially
comprises moving a core onto which the new roll is to be wound into
peripheral engagement with a rotatable web support to form a nip
therebetween through which the web is transported. The core is
wider than the web width with ends or extensions thereon extending
past the adjacent edges of the web. A cutting strip having a tear
strength greater than that of the web is placed in a holding
position between spaced apart portions of the web and roll, and has
a central portion in register with the web surface facing the roll,
and inclined at an angle to the nip of the core and roll. The
cutting strip is arranged to have leading and trailing end portions
extending beyond the adjacent edges respectively of the web, and an
adhesive tap portion secured to the leading end portion. The
cutting strip is moved from the holding position to a transfer
position in which it is fed directly into the nip causing the
adhesive tab portion to adhere to the core end or extension, and
the strip to sever the web and to transfer the leading end of the
severed web onto the core.
A preferred embodiment of a cutting strip handling apparatus for
releasably holding a cutting strip, and moving it into the nip of
the roll and core comprises a table for releasably supporting a
cutting strip support sheet with the leading end of the sheet
extending beyond the leading edge of the table. The table is
slidably mounted on a bed for reciprocal movement in a direction
laterally of the web between a loading position, in which the table
is clear of the web and in position to be loaded with a support
sheet having a cutting strip, and a holding position in which the
table is spaced from and in register with the web. The bed is also
slidably mounted on a rigid frame for reciprocal movement
longitudinally of the web between the holding position and a
transfer position, in which the leading end of the support sheet is
slowly inserted or thrown into the nip between the core and
roll.
It is, therefore, one of the objects of the present invention to
provide an improved method and apparatus for terminating the
formation of a web roll by severing the web, and transferring the
leading end of the severed web onto a core to form a new roll.
Another object of the invention is to provide an improved method
for terminating the formation of one web roll and initiating the
winding of a new roll that minimizes loss of time and wastage of
paper during the transfer operation.
Another object of the invention is to provide an improved method
and apparatus for terminating one roll and initiating the winding
of a new roll that avoids manual manipulation of a cutting strip by
the operator during the transfer operation, and hence the
likelihood of operator injury.
Another object of the invention is to provide an improved method
and apparatus for terminating the winding of a web on one roll, and
initiating the winding of a new roll, in which the transfer
operation is more accurately and precisely initiated and terminated
than heretofore.
Another object of the invention is to provide an improved method
and apparatus for terminating the winding of a web on one roll and
initiating the winding of a new roll in which a support sheet used
in the transfer operation releasably attaches the end of the old
roll to the adjacent roll convolution.
Another object of the invention is to provie an improved method and
apparatus for terminating the winding of a web on one roll and
initiating the winding of a new roll that is of simple design and
construction, thoroughly reliable and efficient in operation, and
economical to manufacture.
The invention and its objects and advantages will become more
apparent from the detailed description of the preferred embodiment
presented below.
BRIEF DESCRIPTION OF THE DRAWINGS
In the detailed description of the preferred embodiment of the
invention presented below, reference is made to the accompaning
drawings, in which:
FIG. 1 is a schematic side elevational view of one type of web
rewinding apparatus in which a preferred embodiment of the
invention is incorporated;
FIG. 2 is an enlarged perspective view of the rewind apparatus of
FIG. 1 with the web broken away to illustrate the support sheet
handling apparatus in a holding position in full lines, and a
loading position in broken lines;
FIG. 3 is a fragmentary perspective view similar to FIG. 2
illustrating the support sheet handling apparatus in a transfer
position, in which the support sheet is fed into the nip between
the roll and core;
FIG. 4 is a fragmentary perspective view illustrating the cutting
strip severing the web and transferring the leading end of the
severed web onto a new core during a transfer operation;
FIG. 5 (sheet 4 of the drawings) is a top plan view of a support
sheet and an embodiment of cutting strip mounted thereon;
FIG. 6 (sheet 3 of the drawings) is an enlarged view in section
taken substantially along line 6--6 of FIG. 5; and
FIG. 7 (sheet 4 of the drawings) is a top plan view of a support
sheet onto which is mounted a different embodiment of the cutting
strip.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Because web winding mechanisms are well known, the present
description will be directed in particular to elements forming part
of, or cooperating more directly with, the apparatus of the present
invention. Elements of web winding mechanisms not specifically
shown or described herein should be understood to be selectable
from those known in the art.
With reference to FIG. 1 of the drawings, a preferred embodiment of
the invention is illustrated in connection with a known type of
rewinding apparatus in which a web 10 is severed to complete a roll
12, and the leading end of the severed web transferred onto a new
core 14 to initiate winding of a new roll. The rewinding apparatus
is generally provided with a housing 16 pivotally mounted on a
shaft 18 having a core support means 20 movable to a core latched
position by a fluid cylinder 22 for holding new core 14 generally
at a transfer station designated A, but out of peripheral
engagement with a winding drum 24. Web 10 from a paper making
machine or the like is fed over guide rollers 26, severed by
suitable mechanism and transferred onto new core 14 when it is
moved by housing 16 via arm 27, eccentric wheel 28 and cam 30 into
engagement with winding drum 24. The rotating core 14 and web 10
being wound thereon is moved further along the periphery of winding
drum 24 by housing 16 until it reaches a final winding position
designated B at which time the core 14 is released and housing 16
returned to its normal position for receiving and holding a new
core. When roll 12 is fully wound at winding station B, the web is
severed once again and the severed end transferred onto a new core
14 at station A. A roll removing follower arm 32 is pivotally moved
by fluid cylinder 34 cuasing spring mounted dog 36 to engage the
spindle of the fully wound roll 12 and slide the roll along rails
38 to the broken line position at the unloading station designated
C. Since rewinding mechanisms of the aforementioned type are
generally old in the art, further specific details of the mechanism
will not be described in the specification or disclosed in the
drawings.
During a normal web rewinding operation of the aforementioned
rewinding apparatus in which the structure of this invention is
incorporated, the web 10 is trained over guide rollers 26, over
winding drum 24 and onto core 14 which has been moved as indicated
heretofor by housing 16 and eccentric 28 to the winding position B.
Core 14 is normally provided with double sided adhesive tape rings,
not shown, on its periphery to prevent slippage between the roll 12
and the core during subsequent operations. The roll 12 at station B
is driven by drum 24, and web 10 wound thereon until it reaches the
desired size. When this occurs, the web is severed by one of two
possible cutting strips 40,40' (FIGS. 2 and 7) fed into the nip
formed by new core 14 and drum 24 by a feeding mechanism 41 to be
described in detail hereinafter. The severing operation completes
the old roll, and the severed leading end is transferred to new
core 14 previously moved by housing 16 into peripheral engagement
with drum 24 at transfer station A. The transfer operation is
preferably not commenced until after new core 14 has been in
peripheral engagement with driving drum 24 for a sufficient period
of time so that the peripheral speeds of the drum and core are
substantially equal. Accordingly, when the transfer is made,
slippage between the new core 14 and web 10 is minimized resulting
in minimal creasing or distortion of the web as it is wound onto
the core.
As indicated earlier, the web 10 is severed and the severed leading
end transferred onto the new core by one of the cutting strips
40,40' illustrated in FIGS. 5 and 7 respectively. The core is
longer than the web width, or if the same length, is provided with
core extensions so that the core ends extend past the adjacent
edges of the web. With regard to strip 40, the leading end 42
thereof has a tab portion 44 secured thereto having an adhesive
surface facing the core when brought into engagement therewith for
adhering to the core end when it is fed into the nip between the
core and drum. The strip 40 is preferably formed from a
polyethylene terephthalate material such as Estar (trademark) or
Mylar (trademark) having a tear strength greater than that of the
web. Since polyethylene terephthalate material is relatively
slippery, in order to cut the web, it is desirable to adhere strip
40 to web 10 during the transfer operation. This can be achieved by
placing a tape 46 (see FIGS. 5 and 6) having an adhesive surface on
both sides such as commercially available Scotch (trademark)
cellophane tape along the central portion 45 of the cutting strip
with one side adhering to the strip and the other side adapted to
adhere to web 10 when strip 40 is fed into the nip between core 14
and drum 24. When a cutting strip 40 of the type illustrated in
FIG. 5 is positioned between spaced apart portions of the web and
drum, the central portion 45 is arranged in register with web 10
with the leading and trailing ends thereof extending past adjacent
edges of the web. The tab portion 44 is substantially parallel to
the adjacent edge of the web, and when the strip is fed into the
nip between the core and drum, the tap portion 44, which extends
past the adjacent edge of the web, will wrap partially around new
core 14 and adhere thereto preventing the tap portion from tearing
away from the core during the high speed transfer operation. Strip
40 will sever the web as it follows the curvature of the new core
as illustrated in FIG. 4. In the cutting strip 40' shown in FIG. 7,
the central portion 45' of the cutting strip is V-shaped and
provided with an adhesive tab portion 44' secured to each end
thereof. When positioned in a holding position, central portion 45'
is substantially in register with the web with the ends thereof
extending past adjacent edges of the web. The tap portions 44' also
extend past the web, and preferably are substantially parallel
thereto.
The cutting strips 40,40', as best seen in FIGS. 5 and 7, are each
initially releasably secured to a preferably flexible support 48
such as a sheet of paper or the like by any suitable means such as
a tape or tapes 50,50'. The tapes each have an adhesive surface on
one side in engagement with the central portion 45 of cutting strip
40, and an adhesive surface on the opposite side adhering to
support sheet 48. The adhesive force with which a cutting strip
40,40' adheres to support sheet 48 is designed to be less than the
adhesive force with which the cutting strip adheres to the web when
moved into engagement therewith during a transfer operation.
Accordingly, the cutting strip 40,40' will pull away from support
sheet 48 during the transfer operation. When this occurs, support
sheet 48 either falls to the ground, or if provided with an
adhesive surface on the side of the leading end of the sheet facing
the web, will adhere to the trailing end of web 10 on the old roll
12. Also, if support sheet 48 is provided with an adhesive portion
on the side of the trailing end of the sheet facing the web, it
will releasably attach the end of the old roll to the adjacent roll
convolution, and serve to prevent the trailing end of old roll 12
from unwinding. In addition, the transport sheet may be removed
from the old roll and reused.
The cutting strip feeding mechanism 41, as best seen in FIG. 2, for
feeding the cutting strip into the nip of core 14 and drum 24
comprises a rectangular table 52 for supporting sheet 48, and
confining the sheet on three sides by peripheral lips 54. A third
or leading side or edge of the table is unconfined, and a leading
edge 56 of support sheet 48 extends a short distance past or
overhangs the adjacent leading edge of table 52. Where the sheet is
inserted into the nip of core 14 and drum 24, such overhang may be
three inches or more in order to prevent table 52 from striking
drum 24. The table 52 is slidably mounted on an elongated,
rectangular bed 58 through complimentary elongated rib and slot
guideways 60 for reciprocal movement in a direction laterally of
web 10 between a loading position, shown in broken lines in FIG. 2,
in which the table is clear of the web and in position to be loaded
with a support sheet having a cutting strip, and a holding
position, shown in full lines in FIG. 2, in which table 52 is in
register with and below web 10. The bed 58 is slidably mounted on a
rigid frame 62 for reciprocal movement parallel to the web between
the holding position and transfer position, as shown in FIG. 3, in
which the leading end or edge 56 of support sheet 48 is slowly fed
into, or, if desired, rapidly thrown into the nip between core 14
and drum 24. Although frame 62 is shown rigid, it may be arranged
to be movably mounted by any suitable means for movement to the
holding positions before table 52 can be moved to the loading
position. The slidable mounting between bed 58 and frame 62
comprises depending flanges 64 on the bed having openings for
slidably receiving rods 66 extending between flanges 68 on the
frame. The leading flanges 68 on frame 62 limit forward travel of
bed 58 and table 52 by interference between flanges 64, 68 to a
precise transfer position, or the flanges 68 may be provided with
adjustable screws, not shown, to provide an adjustable stop
engageable by flanges 64. The reciprocating motion is imparted to
table 52 by any suitable means such as a fluid cylinder 70
controlled by fluid valves connected to a fluid pressure source by
flexible tubing or the like. By properly adjusting and regulating
the fluid pressure, the sheet 48 can be thrown into the nip at
substantially the speed of the web. This may be desirable at high
web speeds, particularly those in excess of 500 feet per
minute.
In the operation of this invention, let us assume that a decision
has been made to terminate the old roll 12 and initiate winding a
new roll on a new core 14. The operator will mount new core 14 on
the winding apparatus and move the core through housing 16 and
related apparatus into peripheral engagement with winding drum 24.
The operator will also place one of the cutting strips 40,40' on a
support sheet 48, laterally move table 52 outwardly clear of web 10
to its loading position, load support sheet 48 on table 52, and
return the table to its holding position. In such holding position,
the central portion 45,45' of cutting strip 40,40' respectively is
substantially in register with web 10 and inclined at an angle to
the nip of core 14 and drum 24. Applicants have found that an angle
of 6.degree. provides satisfactory results, but any other suitable
angle may be used. The leading and trailing ends of central
portions 45,45' extend past the adjacent edges of web 10, and the
tab portion 44,44' is substantially parallel to the adjacent edge
of the web. The order of performance of the foregoing operations of
loading a new core and cutting strip may vary depending upon
various circumstances. When the core 14 has been moved into
peripheral engagement with drum 24, and the peripheral speeds of
the core and drum are substantially equal, the transfer operation
is initiated by automatically or manually actuating fluid cylinder
70 causing bed 58 and table 52 to be moved from the holding
position to the transfer position for feeding leading end 56 of
support sheet 48 into the nip between the core and drum. The tab
portion 44,44' of cutting strip 40,40' wraps around and adheres to
new core 14, and the cutting strip severs web 10 and winds the
leading end 72 (FIG. 4) of the severed web onto new core 14 to form
a new roll. The support sheet 48 either drops off and is discarded,
or adheres to the trailing end 74 of the severed web and is wound
on the old roll 12.
Although the invention is shown in connection with a web rewinding
machine of the type illustrated in FIG. 1, it is usable in any type
of web winding apparatus in which a new core is movable into
peripheral engagement with a web support, fixed or rotatable, over
which the web is transported. For example, the new core could be
moved directly into peripheral engagement with an old roll as it is
being wound, and the web then severed to terminate the old roll and
initiate winding a new roll on the core.
The invention has been described in detail with particular
reference to preferred embodiments thereof, but it will be
understood that variations and modifications can be effected within
the spirit and scope of the invention as described hereinabove.
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