U.S. patent number 3,857,524 [Application Number 05/404,107] was granted by the patent office on 1974-12-31 for surface enveloper transfer winder.
This patent grant is currently assigned to Beloit Corporation. Invention is credited to James J. Melead, Stanley C. Zink.
United States Patent |
3,857,524 |
Melead , et al. |
December 31, 1974 |
SURFACE ENVELOPER TRANSFER WINDER
Abstract
Apparatus for winding a continuous web into a plurality of
spools. The web partially wrapping a power driven winding drum is
in a nipping relationship between the winding drum and the winding
web spool. A core in synchronous speed is brought into light
engagement with the web and winding drum. The core is then indexed
to the position where the new spool will be started.
Simultaneously, a driven enveloper roll is brought into engagement
with spool to keep it winding while being moved away from the
winding drum. Partially wrapping the core and enveloper roll the
web is ready to be severed by a power actuated knife and
transferred to the core. The knife is located transversely across
the moving web between the core and enveloper roll. Severing the
web near the core the knife urges the leading end of the severed
web to wrap the core and be carried into the nip between the core
and winding drum. Without stopping or slowing down the web and
without adhesives on the core, a new spool is started winding. The
knife may be provided with a means, such as a brush or sponge to
assist in wrapping the web against the core.
Inventors: |
Melead; James J. (Roscoe,
IL), Zink; Stanley C. (Fulton, NY) |
Assignee: |
Beloit Corporation (Beloit,
WI)
|
Family
ID: |
23598188 |
Appl.
No.: |
05/404,107 |
Filed: |
October 5, 1973 |
Current U.S.
Class: |
242/527.3;
242/532; 242/542.3 |
Current CPC
Class: |
B65H
19/2261 (20130101); B65H 2408/236 (20130101) |
Current International
Class: |
B65H
19/22 (20060101); B65h 019/26 () |
Field of
Search: |
;242/56R,56A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McCarthy; Edward J.
Attorney, Agent or Firm: Veneman; Dirk J. Samlon; Bruce L.
Mathews; Gerald A.
Claims
What is claimed is:
1. An apparatus for continuously winding a web into a plurality of
spools comprising:
a surface winding drum having a fixed rotational axis;
a core;
means to position said core into contact with said winding drum to
receive the web to be wound into spools on the core;
an enveloper roll;
guide means to position said enveloper roll to engage the spool as
it moves away from said winding drum while maintaining surface
winding of the web between said enveloper roll and said spool;
a web severing means;
said severing means being positionable between said winding drum
and said enveloper roll to sever said web and urge transfer of the
web leading edge between said winding drum and said core to cause
winding of said web about said core.
2. The apparatus constructed in accordance with claim 1 and further
including:
a pair of power actuated primary arms pivotally mounted about the
axis of the winding drum to position the core in contact with said
winding drum and to accommodate movement of said core about the
periphery of said winding drum.
3. The apparatus constructed in accordance with claim 1 and further
including:
a pair of pivotal secondary arms having fluid pressure means to
move said arms into engagement with the core and the web winding
thereon to maintain pressure contact between the winding web spool
and the winding drum.
4. The apparatus of claim 3, wherein:
said secondary arms maintain pressure contact between the winding
web spool and the enveloper roll.
5. The apparatus constructed in accordance with claim 1,
wherein:
the guide means comprises a power actuated pivotal arm which moves
the enveloper roll to engage the spool and move it from contact
with the winding drum while the spool is still being wound with the
web.
6. The apparatus constructed in accordance with claim 1,
wherein:
the guide means comprises a pair of spaced apart arms pivoted for
movement about the axis of the winding drum and extending radially
outward from said axis to support the enveloper roll at a spaced
distance from the winding drum.
7. The apparatus of claim 6, wherein:
said arms and enveloper roll supported thereon include a means to
rotate said arms and said enveloper roll 360.degree. about the axis
of the winding drum.
8. The apparatus constructed in accordance with claim 1,
wherein:
the guide means comprises a pair of spaced apart power actuated
arms pivoted for movement about the winding drum axis, a second arm
pivoted from the opposite end of each said first arms, means to
move said second arms with the enveloper rolls supported for
rotation from said second arms, whereby said first arms provide
movement for the enveloper roll about the axis of the winding drum
at a spaced distance from said winding drum and said second arms
provide movement of the enveloper roll toward and from the axis of
said winding drum, wherein said enveloper roll engages the core and
web winding thereon in a nipping relationship for a hard center
start of the web being wound on the newly started web spool.
9. The apparatus constructed in accordance with claim 1,
wherein:
said guide means comprises a pair of pivotal rails, an enveloper
roll support means slidably mounted on said rails, means to
position said enveloper roll support means therealong said rails,
means to position said pivotal rails toward and from said winding
drum.
10. The apparatus constructed in accordance with claim 1 and
further including:
a drive means connected with said enveloper roll for driving said
enveloper roll at substantially the same speed of the web.
11. The apparatus constructed in accordance with claim 1,
wherein:
said severing means comprises a pair of pivotal crescent shaped
arms having a knife blade extending therebetween said arms, means
to move said arms and knife blade about the pivotal axis of said
arms to sever the web.
12. The apparatus of claim 11, wherein:
said arms and knife blade partially encircle the core when in the
web severing position whereby the action of said arms and knife
blade urges the leading edge of the severed web to be transferred
into the nip between said core and the winding drum.
13. The apparatus of claim 12, and further including:
a means located adjacent said knife blade and extending inwardly
toward the core to urge the leading end of the severed web into
contact with said core.
14. The apparatus constructed in accordance with claim 1,
wherein:
said severing means comprises a pair of spaced apart J-shaped arms
pivoted for movement about the axis of the winding drum and a knife
blade extending therebetween said arms to severing the web, and a
fluid pressure means to activate said arms.
15. The apparatus constructed in accordance with claim 1,
wherein:
said enveloper roll is located at a pre-determined position whereby
the winding web spool by virtue of increasing size contacts said
enveloper roll to move itself away from the winding drum while said
enveloper roll maintains the surface winding of the web thereon
said spool until the web is severed and transferred to a new
core.
16. An apparatus for continuously winding a web into a plurality of
spools comprising:
a surface winding drum;
a core;
means to position said core into contact with said winding drum to
receive the web to be wound into spools on the core;
a core support means;
said support means being selectively movable into pressure
engagement with the core thereby maintaining the rotational axis of
said core substantially parallel to the rotational axis of the
winding drum;
an enveloper roll;
guide means to position said enveloper roll to engage the spool as
it moves away from said winding drum while maintaining surface
winding of the web between said enveloper roll and said spool;
a web severing means;
said severing means being positionable between said winding drum
and said enveloper roll to sever said web and urge transfer of the
web leading edge between said winding drum and said core to cause
winding of said web about said core.
17. The apparatus constructed in accordance with claim 16,
wherein:
said core support means comprises a rotatably mounted roller being
substantially the same length as the core, a roller support means
movable to support said roller in a nip defining relationship with
said core.
18. The apparatus of claim 17, wherein:
said roller is supported for rotation from the enveloper roll
support arms whereby said enveloper roll and said roller are
simultaneously indexed into position for severing and transferring
of the web to a new core by the knife.
19. The apparatus of claim 17, and further including:
a drive means connected with said roller for driving said roller at
substantially the same speed of the core and the web.
20. The apparatus constructed in accordance with claim 16,
wherein:
said severing means comprises a pair of spaced apart pivotal
crescent shaped arms partially encircling the core support means
and the core when in the web severing position and having a knife
blade extending therebetween said arms, means to move said arms and
knife blade about the pivotal axis of said arms to sever the web
and urge the leading edge of the severed web to be transferred into
the nip between said core and the winding drum.
21. A method of continuously winding a web into a plurality of web
spools on a winding apparatus which includes a driven winding, a
plurality of cores, an enveloper roll and a web severing means,
comprising the steps of:
a. nipping a first core against the winding drum thereby driving
said core,
b. passing the web into the nip and around the first core,
c. engaging the winding web spool with the enveloper roll,
d. moving the web spool away from the winding drum and maintaining
surface winding of the web about the web spool with the enveloper
roll,
e. positioning a second core in contact with the winding drum with
the web therebetween,
f. severing the web between the second core and the enveloper
roll,
g. transferring the leading edge of the severed web into the nip
between the second core and the winding drum.
22. A method as defined in claim 21 and including:
starting the web wrapping a core without stopping or slowing down
the speed of said web and without adhesives on said core.
23. A method as defined in claim 21 and including:
engaging the winding web spool with the enveloper roll as the web
is being wound to support the growing web spool.
Description
BACKGROUND OF THE INVENTION
This invention relates to a web winding apparatus for winding a
continuous web into a plurality of spools.
In particular, this invention relates to surface type winders
wherein the winding spool is driven by a nipping relationship with
a power driven winding drum.
Further, this invention relates to improvements in cutting and
transferring the web to a new mandrel or core without stopping or
slowing down the web.
With the increasing speed in present day winders, especially single
drum or surface type winders, the cutting and transferring of the
web from a winding spool to a new core is becoming a serious
problem, especially without adhesives on the core.
The undesirable results of bias cuts across a relatively thin or
thick webs on high speed winding machines are well known and need
not be discussed any further. Instead, we will discuss the
undesirable characteristics of winders that employ straight cutoff
and transfer devices for starting the web winding on a new
core.
U.S. Pat. No. 2,915,255 to Phelps discloses the use of a knife
blade rotatably mounted on the ends of a guide roller which lifts
the web off the drum prior to severing the web between the winding
roll and new core. However, this requires a supplemental drive for
rotating the full roll supported on the secondary arms to control
the tension in the web when the full roll is retracted out of
contact with the winding drum before the web is severed and started
on a new core. Further, this patent discloses this use of adhesives
on the new core.
Another U.S. Pat. No. 3,365,141 to Soloduk discloses a serrated
knife pressing into the moving web severing it and causing it to
start wrapping a new core which has already been prepared with
adhesives. Further, the points of the serrated blade contact the
surface of the winding drum, therefore, the drum surface should be
hardened to prevent grooving and scratching.
U.S. Pat. No. 3,471,097 to Phelps shows an endless belt entrained
about a pair of rollers for engaging and decelerating the winding
spool as the spool leaves the winding drum. The deceleration of the
spool produces slack within the web traveling between the drum and
spool. An air pipe is used for forming a loop in the slack web
after which the web is severed by air jets from the pipe. This
method is extremely unacceptable for relatively heavy web that have
a high tensile strength.
Another means for starting a web on a new core is the use of air to
blow the web into the nip between the core and the winding drum.
After the web makes a few wraps on the new core, the web comes into
tension between the newly started core and the fully wound roll to
snap the web in half. However, this method produces an undesirable
spool as the first few wraps on the new core are doubled or folded
over. This method is not acceptable to high tensile strength webs,
especially mono-film and composite film.
SUMMARY OF THE INVENTION
Accordingly, it is an object of this invention to provide a means
of winding a continuous web into a plurality of spools on a single
drum or surface winder wherein the web is severed and transferred
to a new core without stopping or slowing down the web and without
using adhesives on the core.
Another object of the invention is to provide a means for moving
the winding spool out of engagement with the winding drum whereby
said spool maintains surface winding methods with said means. Said
means may be a driven enveloper roll selectively operable in and
out of engagement with the periphery of the spool.
Another object of the invention is to provide a web severing means
between the new core and the enveloper roll wherein the action of
said severing means is sufficient to effectively start the web
winding on the new core without an adhesive on the said core. Said
severing means including a knife blade support for movement on
pivotal arms may further include a means of heating said knife
blade to assist in severing relatively heavy webs, such as
plastic.
Another object of the invention is that after the web cutoff and
transfer, the enveloper roll includes a movable support means for
positioning the enveloper roll in surface engagement on the
underside of the newly winding spool to prevent deflection of
relatively small spools on relatively wide machines. The enveloper
roll may remain in contact with the spool for the entire winding
operation or the enveloper roll be withdrawn after the spool
reaches sufficient size to be self-supporting without deflecting in
the center.
Another object of the present invention is to provide a support
means on the underside of the peripheral surface of relatively
small diameter cores on relatively wide machines while the
enveloper roll is in a surface winding relationship with the spool.
Said support means may be a rotatably mounted roll on the enveloper
roll support means to allow simultaneous movement of said rolls.
During operation as the enveloper roll engages the winding spool
providing a space relation between the drum and spool, the support
roll is in a position for receiving the new core that is being
indexed from its load position to its winding position.
Still another object of the invention is that relatively small
spools or relatively large spools may be continuously wound by
surface winding methods.
Other objects and advantages of the invention will be apparent from
the following description and drawings without departing from the
spirit and scope of the invention.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagrammatic side elevation view of a web winding
apparatus constructed in accordance with the principles of the
present invention and showing the apparatus in a run position prior
to severing the web.
FIG. 2 is a diagrammatic side elevation view illustrating a
modified arrangement and form of a web winding apparatus
constructed in accordance with the principles of the present
invention and showing the apparatus in a run position prior to
severing the web.
FIG. 3 is a diagrammatic side elevation view illustrating another
modified arrangement and form of a web winding apparauts
constructed in accordance with the principles of the present
invention and showing the apparatus with the knife in the web cut
and transfer position.
FIG. 4 is a diagrammatic side elevation view somewhat similar to
FIG. 1, but showing the web severed by the cut-off knife and
showing the addition of a support roll on the underside of the new
core.
FIG. 5 is a diagrammatic side elevation view of still another
modified arrangement and form of a web winding apparatus
constructed in accordance with the principles of the present
invention and showing the apparatus with the knife in the web cut
and transfer position.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
It should be understood that the showing of the winder is
diagrammatic and that only side of the winder is shown herein, but
the supports for the various rolls and mechanisms of the winder are
at opposite sides of the winder and are substantially the same on
each side, except where a roll or drum may be driven from an end
which cannot be shown on the side of the winder shown herein.
It should be understood that in FIGS. 2 through 5, illustrating a
modified form in which the invention may be embodied, where the
parts are the same as shown in FIG. 1, the same part numbers will
be applied to same parts as shown in FIG. 1 and a description
thereof need not be repeated.
As shown in FIGS. 1 through 5, a surface winder constructed
according to the principles of the present invention includes a
driven winding drum 10 supported for rotation by end bearing blocks
11, and these bearing blocks are each supported on frames 12. The
drive to the winding drum 10 may be a motor (not shown) and gear
drive and may be of a form well-known to those skilled in the art
and not herein shown or described since it forms no part of the
present invention.
The web W traveling from a suitably source and carried over the
periphery of the winding drum 10 is wound into a spool 16 (see FIG.
1, as shown in phantom) by surface winding under tension.
The web is initially wound about a core 17 having end journals (not
shown) and these end journals are each supported on bearing
housings 18. During surface winding operations, the bearing
housings 18 are supported on a pair of parallel spaced apart rails
14. The rails 14 are mounted horizontally on the top of spaced
apart frames 12 and 13 (FIG. 1-4, rails 14 are shown broken away
from frames 12 for clarity).
The secondary arms 21 may be like those shown and described in U.S.
Pat. No. 3,614,011 dated Oct. 19, 1971 and generally include a
forked upper end portion forming a cradle 20 for the spool 16 and
having an upright arm with a roller 19 thereon engageable with the
bearing housings 18 of the core, and pressing the spool 16 and web
wound thereon into engagement with the surface of the winding drum
10.
The secondary transfer arms 21 maintain the core 17 and web wound
thereon into engagement with the surface of the winder drum 10 and
accommodate movement of the core 17 away from said winder drum as
the web builds up on said core until the spool is built up to size.
The secondary arms 21 are pivoted to the base of the apparatus on
bearing supports 23 extending upwardly from the base on pivot pins
22. Fluid pressure cylinders 24 (not shown in FIG. 2) are pivoted
at their head ends to the frames 12 on pivot pins 25. Pistons (not
shown) within said cylinders have piston rods 26 therefrom and
extensible from said cylinders. The piston rods 26 each have
connection with a secondary arm 21, as by a pivot pin 27. The
cylinders 24 and piston rods 26 move the secondary arms 21 toward
and from the winding drum 10 and bias the partially wound spool
into engagement with the winding drum 10, to provide the drive
force to build the spool up to size.
Upon completion of winding operations, the secondary arms 21 move
the wound spool down the rails 14 to a core stop 15 extending
upwardly from the end of said rails. Once the fully wound spool has
reached a position adjacent to the core stop 15, a crane device or
other lifting mechanism may be employed for removing the spool from
the winding apparatus.
The primary arms 28 may be like those shown and described in U.S.
Pat. No. 3,614,011 dated Oct. 19, 1971, pivotally mounted on each
end of the winding drum 10 for pivotal movement about the axis
thereof. Each primary transfer arm 28 has an inwardly opening guide
(not shown) extending therealong and forming a guide for a holding
jaw 29. The jaw 29 has an open recessed portion opening to the drum
10 and engageable with a bearing housing 18 for the core 17, to
move said core about the axis of the drum 10 from the load position
A of said core along a cam surface 30 into engagement with said
winding drum and web transfer position B, as shown in FIG. 1. The
holding jaw 29 is moved into engagement with the bearing housing 18
of the core 17 by operation of a piston rod (not shown) extending
from a piston (not shown) within a cylinder (not shown), to move
the holding jaw along its guides, to accommodate loading of the
core onto said primary transfer arms and release of the core when
so desired upon the horizontal rails 14. The bearing housings 18
for the core 17 form a suitable support for the core on suitable
bearings contained within the bearing housings, and ride along the
cam surface similar to that shown in the aforementioned U.S. Pat.
No. 3,614,011 and incorporated herein by reference, so not shown or
described further.
The primary arms 28 are rotatably mounted about the axis of the
winding drum 10, similar to those shown and described in U.S. Pat.
No. 3,614,011 dated Oct. 19, 1971 and incorporated herein by
reference, and are driven by meshing spur gears 37. The spur gears
may be driven by a suitable motor and gear reduction drive. The
drive is such as to index the primary arms from the core load
position A to the web transfer position B and then onto the rails
14 where the control of the reeling operation is continued by the
secondary transfer arms 21.
As shown in FIG. 1, spaced and parallel from the winding drum 10,
the enveloper roll 31 is supported at its opposite ends on end
bearings (not shown) and these end bearings are each supported by
spaced apart support arms 32. The support arms 32 are mounted for
rotation about an axis coaxial with the axis of rotation of the
winding drum 10 and spaced between the end of the winding drum 10
and the primary transfer arms 28 at each side and spaced inwardly
of the rails 14. The enveloper roll support arms 32 are rotatably
driven about the axis of the winding drum 10 by rack and pinion
gears. Extending from each support arm 32 in the general form of a
sector of a circle having a downwardly opening arcuate rack 33
extending therealong and meshed with the pinion 35. The pinion 35
is keyed or otherwise secured to a transverse shaft 34 journaled on
each end for bearings (not shown) and these bearings are suitably
mounted on frames 12.
The shaft 34 and pinions 35 adjacent each end of said shaft are
driven from the opposite side of the apparatus by a motor (not
shown) and a speed reducer gearing (not shown) at a constant rate
of speed, to move the support arm 32 and enveloper roll 31 thereon
from its dormant position C to position D where the surface winding
operation is continued by the enveloper roll 31.
It should be understood that, the support arms 32 may be pivoted
about the axis of the winding drum 10 by a means (not shown), such
as a fluid pressure cylinder pivotally attached to the frames 12
and having a piston therein and a piston rod extensible therefrom
with the rod pivotally connected to the support arms 32, to move
the enveloper to either position C or D.
Further, it should be understood that the rack 33 (FIG. 5) may be
in the general form of a full circle segment for rotating the
support arms 90 and the enveloper roll 31 thereon 360.degree. about
the periphery of the winding drum 10 for which the advantage will
become more apparent later on.
As shown in FIG. 1, a knife being in the form of a pair of parallel
spaced apart arcuate scythe-like arms 36 having a knife blade 45 on
the ends thereof and extending across the winder is provided to
sever the web between the new core and the enveloper roll, and to
accommodate the leading edge of the severed web to be tucked in the
nip between the new core and the winding drum. The underneath
surface of the knife may be provided with a suitable means, such as
a sponge 70 shown in FIG. 3, or a brush (not shown), to assist in
guiding the leading edge of the severed web into the said nip. The
enveloping action caused by the knife has been found sufficient to
effectively initiate a new web roll without an adhesive on the
core. The blade 45 may also be provided with a means of heating
said blade, such as electrically, to assist in severing relatively
heavy webs, such as plastic.
The knife arms 36 are pivotally mounted on the inward side of each
support arm 32 at pivots 44 and are movable under the action of a
fluid pressure cylinder 42 to move the knife blade 45 from its
retracted position, as shown in FIG. 1. The fluid pressure
cylinders 42 are transversely pivoted to ears 43 extending downward
from the support arms 32 on pivot pins 41. Pistons (not shown)
within said cylinders have piston rods 40 extending therefrom and
extensible from the cylinders. The piston rods 40 each have
connections with ears 38 extending outwardly from knife arms 36, as
by pivot pins 39.
As shown in FIG. 1, operation of the apparatus is as follows
assuming that a web roll or spool 16 (shown in phantom) is being
wound on a core 17 with the web W trained from a suitable source
and passing over the winding drum 10 and winding up into a spool
16. Pressure is being maintained between the winding spool 16 and
the drum 10 by cylinder 24 acting through arms 21.
With a new core in the load position A held by the primary arms 28
and jaw 29 against the cam surface 30, it is sometimes necessary,
depending upon the type of web, size of core, and web speed, to
provide a means to accelerate the new core to web speed prior to
its contact with the winding drum between the core load position A
and web transfer position B. The profile of the cam surface 30 will
determine the point between core position A and B where the new
core will contact the periphery of the winding drum. Means to
accelerate the core are well known in the art and, therefore, are
not shown herein.
As the winding spool 16 reaches the desired or maximum size, the
new core 17 in synchronous web speed is indexed from load position
A to web transfer position B by primary transfer arm 28.
Simultaneously, the support arms 32 index the enveloper roll 31
from its dormant position C to position D whereby the enveloper
roll 31 engages the periphery of the winding spool 16 to move said
spool away from the winding drum 10 and to maintain the surface
winding of the said spool and to provide space for the core 17 to
be indexed to web transfer position B. With the core in position B
and the enveloper roll in position D, the apparatus is in the ready
position to transfer the traveling web to a new core. The web
traveling over the periphery of the winding drum is now passing
through the nip between the said drum and a new core, substantially
wrapping the underside of the new core the web is trained in a
generally upward direction over the periphery of the enveloper roll
and into the nip between said roll and the spool with the web
winding thereon. As shown in FIG. 1, the knife blade and knife arms
are in their retracted position. Also, the pistons within the fluid
pressure cylinder, used to activate the knife arms, are in their
retracted position. A means is used to evacuate the air from the
rod end of the cylinders while simultaneously supplying pressure to
the other end of said cylinders to move the knife arms at a rapid
speed into the cut position (see FIG. 3) where the knife severs the
web and guides the leading edge of severed web into the nip between
the winding drum and the new core to instantaneously start said web
winding on said core. The knife and enveloper roll are then
retracted to their dormant position. After the secondary arms
release the wound web spool they engage the new winding spool and
then the primary arms release the winding spool and return to their
load position to await such time as the entire above sequence is
repeated.
FIG. 2 is constructed in accordance with the principles of the
present invention to be especially used on existing surface winders
where the gage dimensions will not permit the construction
otherwise described herein. The type of construction in FIG. 2 can
be used with a minimal amount of rework to existing surface winders
in the field.
FIG. 2 is substantially the same as FIG. 1 in construction and
operation except that the support arm 32 (FIG. 1) will be replaced
by the apparatus hereafter described in FIG. 2.
In FIG. 2, the enveloper roll 31 is supported at its end on end
bearings (not shown) and these end bearings are each supported on
spaced apart frames 55. The frames 55 are mounted for movement on a
cantilevered slide rails 53 to accommodate movement of the
enveloper roll 31 toward and from the winding web spool 16. The
cantilevered rails 53 are pivoted to the base of the apparatus on
bearing supports 50 extending upwardly from the base on pivot pin
51. The rails 53 are supported at their opposite ends by pivotal
links 58, 60 extending downwardly to the base. The upper links 58
are pivotally mounted by pivot pins 57 to ears 56 extending from
rails 53. The upper links 58 and lower links 60 are pivotally
attached coaxial about the axis of pivot pin 59. The opposite ends
of lower links 60 are pivoted to the base of the apparatus on
bearing supports 61 extending upwardly from the base on pivot pins
62. To accommodate movement of the links, fluid pressure cylinders
65 are transversely pivoted to ears 67 extending from frames 13 on
pivot pins 66. Pistons (not shown) within said cylinders have
piston rods 64 extending therefrom and extensible from said
cylinders. The piston rods 64 each have connections with lower
links 60, as by pivot pins 63. The cylinders 65 and pivotal links
58, 60 provide a means to pivotally raise or lower the rails 53
about pivot pins 51.
The pivotal links and cylinders provide a locking means to rigidly
support the enveloper roll in the cut-off and transfer position to
prevent bouncing of the enveloper roll when the knife is fired to
sever the web. Further, the links and cylinders provided a second
means to position the enveloper roll toward and from the winding
drum. After the web cut-off and transfer, it may be necessary to
lower the slide rails before retracting the enveloper roll
therealong said rails so that the enveloper roll may clear the
newly winding web spool to prevent entrapment of said enveloper
roll by said newly winding web spool.
To accommodate movement of frame 55 and enveloper roll 31 along
side rails 53, a worm gear actuators 52 are mounted on the end of
each rail 53 with a cross-shaft (not shown) extending therebetween.
On the opposite side of the apparatus the worm gear actuator has a
journal extending outwardly coupled or otherwise secured to an air
motor (not shown) to provide a means of driving said actuators 52
and said cross-shaft (not shown) therebetween. The drive may be of
various well known forms so need not herein be shown or described
further. Extending along slide rails 53 from the worm gear
actuators 52 are a rotatable threaded shaft 54. The shaft 54 having
a threaded nut 54a securely fastened to frame 55, provides a means
of moving said frames therealong slide rails 53 upon rotation of
said shaft by the actuators 52. It is to be understood that other
means, such as air cylinders (not shown) may be provided for
movement of the frames 55 along the rails 53. It is to be
understood that the knife blade 45 and arm 36 are support for
movement in the same manner as FIG. 1, except that the frames 55
now replace support arms 32 in FIG. 1.
FIG. 3 is constructed in accordance with the principles of the
present invention and is substantially the same as FIG. 1, except
that the support arms 32 (FIG. 1) are now replaced by double
pivoting arms 71, 72 for which the advantages will become
apparent.
The enveloper roll 31 is rotatably mounted on spaced apart arms 72.
The arms 72 are pivotally hinged in the middle to the end of arms
71 by pivot pins 73. Arms 71 are pivotally movable about the axis
of winding drum 10 by means previously described. The arms 72 are
pivotally movable under the action of fluid pressure cylinders 76.
The cylinders 76 are transversely pivoted at their head ends to
ears 78 extending outwardly from arms 71 on pivot pins 77. Pistons
(not shown) within said cylinders have piston rods 75 extending
therefrom and extensible from the cylinders. The piston rods 75
each have connections with connections with the end of the arms 72
opposite the enveloper roll 31, as by pivot pins 74. This
arrangement provides two directional movement of the enveloper roll
31. Arms 71 provide movement for the enveloper roll 31 about the
axis of the winding drum 10 and arms 72 provide movement for said
roll toward and from winding drum.
It is to be understood that the knife blade 45 and arms 36 are
substantially mounted and operated in the same manner as shown in
FIG. 1.
FIG. 3 is shown with the knife in the cut and transfer position. In
operation, after severing the web, the knife is retracted to its
dormant position and the enveloper roll 31 is allowed to perform
additional functions if so desired. The double pivoting arms allow
the enveloper roll to be retracted to engage the newly winding web
spool. The enveloper may engage the periphery of the newly started
spool above the horizontal axis of said spool to provide additional
nip pressure along the periphery of said spool during initial
winding operations to obtain a good hard center. However, the
enveloper roll may engage said spool below the horizontal axis to
provide support for said spool to prevent deflection in the center,
especially on wide machines or newly started spools having
relatively small cores.
Where the enveloper roll is supported at a fixed distance from the
winding drum axis, it may be necessary to vary the distance between
said drum and said roll. The double pivoting arms provide a means
to vary the distance between the enveloper roll and the winding
drum to accommodate movement of said enveloper roll to engage a
relatively small diameter web spool to move it away from said
winding drum for severing and transferring the web to a new core.
FIG. 4 is constructed and operated in accordance with the
principles of the invention in FIG. 1, except that a support roll
80 is positioned along the underside of the core, before severing
of the web. On relatively wide machines, the support roll 80
prevents deflection of relatively small diameter cores. The support
roll 80 having end bearings (not shown) and these end bearings are
each supported on the enveloper roll support arms 81, so that the
enveloper roll 31 and support roll 80 are simultaneously indexed
from their dormant position (not shown) to their ready position, as
shown in FIG. 4, to await cutting and transfer of the web to a new
core by the knife, as shown. The arcuate scythe-like knife arms 82
partially encircle both the support roll 80 and the new core 17
when in the web cut and transfer position. It should be understood
that the support roll 80 may have an independent support means and
means to position said support roll into contact with the new
core.
As shown in FIG. 5, both the knife arms 92 and the enveloper roll
support arms 90 are mounted for pivotal movement about an axis
coaxial with the rotational axis of the winding drum 10 and the
primary transfer arms 28. The knife arms 92 and support arms 90 are
located at each end of the winding drum 10 and spaced between said
drum and said primary arms, with the knife arms 92 spaced inward of
the support arms 90.
With the knife arms 92 supported independently of the enveloper
roll support arms 90, the web W may be severed and transferred to a
new core 17 anywhere along the periphery of the winding drum 10
from a position where the said core comes into contact with said
drum from its load position, to the position where said core is
placed upon the horizontal rails 14.
The knife arms 92 having a knife blade 91 on the ends thereof are
pivotally mounted about the axis of the winding drum 10 and are
movable under the action of fluid pressure cylinders 95. The fluid
pressure cylinders 95 are pivoted at their head ends to the frames
12 on pivot pins 96. Pistons (not shown) within said cylinders have
piston rods 94 extending therefrom and extensible from the
cylinders. The piston rods 94 each have connections with the knife
arms 92, as by pivot pins 93. The location of the cylinders or
stroke of the piston within said cylinders will be determined by
the position about the periphery of the winding drum where the web
is severed and transferred to the new core.
In the arrangement shown in FIG. 5, the enveloper roll 31 may be
indexed from its dormant position in a clockwise or
counterclockwise direction about the axis of the winding drum.
However, when indexing in a clockwise direction, the enveloper roll
31 must be rotated past the core load position before the primary
transfer arms 28 may be loaded with a new core. When indexing in a
clockwise direction, the enveloper roll 31 lifts the web W
partially off the drum 10, but surface winding between the spool 16
and drum 10 is maintained until the enveloper roll 31 engages said
spool to move it away from said drum 10.
The enveloper roll 31 (FIG. 1-5) may or may not be driven. The
enveloper roll may not require a drive if the winding web spool has
sufficient momentum to maintain surface winding under tension as
the enveloper moves said spool away from the winding drum and if
the travel of the enveloper roll is sufficient to take-up the slack
in the web caused by the deacceleration of the winding web spool
when said spool is moved out of contact with the winding drum. The
sequence of time between removing the spool from the winding drum
and severing and transferring of the web to a new core and the
amount of inertia the winding web spool has to maintain winding for
a short time are the determining factor to whether a drive is
required or not required.
However, preferably the enveloper roll 31 (FIGS. 1-5) is driven at
substantially web speed, to keep the web spool winding when moving
said spool away from the winding drum by the enveloper roll. A
suitable means, such as a motor 99, is connected to the enveloper
roll 31 through a coupling (not shown) to drive it variably about
its longitudinal axis at a desired speed.
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