U.S. patent number RE35,304 [Application Number 08/174,817] was granted by the patent office on 1996-07-30 for apparatus for applying adhesive on tubular cores for rolls of web material and for feeding same cores to a web winding machine.
This patent grant is currently assigned to Fabio Perini S.p.A.. Invention is credited to Guglielmo Biagiotti.
United States Patent |
RE35,304 |
Biagiotti |
July 30, 1996 |
Apparatus for applying adhesive on tubular cores for rolls of web
material and for feeding same cores to a web winding machine
Abstract
A machine is disclosed for applying adhesive to the small,
tubular cores on which paper webs are wound for the manufacture of
toilet paper, kitchen towels and the like. The machine also moves
the cores from the hopper, and after adhesive is applied, in an
axial direction to the paper re-winder.
Inventors: |
Biagiotti; Guglielmo (Via Di
Vorno, IT) |
Assignee: |
Fabio Perini S.p.A. (Lucca,
IT)
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Family
ID: |
11130673 |
Appl.
No.: |
08/174,817 |
Filed: |
December 29, 1993 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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Reissue of: |
236487 |
Aug 25, 1988 |
04931130 |
Jun 5, 1990 |
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Foreign Application Priority Data
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Sep 1, 1987 [IT] |
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9473 A/87 |
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Current U.S.
Class: |
156/446; 156/508;
493/303; 242/542; 242/533; 156/184 |
Current CPC
Class: |
B65H
19/283 (20130101); B65H 19/2269 (20130101); B65H
19/305 (20130101); B65H 2301/41828 (20130101); B65H
2408/235 (20130101); Y10T 156/1724 (20150115); B65H
2301/4607 (20130101); B65H 2301/41824 (20130101); B65H
2301/41814 (20130101); B65H 2301/41826 (20130101) |
Current International
Class: |
B65H
19/28 (20060101); B65H 19/30 (20060101); B65H
019/20 () |
Field of
Search: |
;156/184,185,190-192,195,212,215,218,172,187,188,425,428,429,443,446-458,468,291
;242/56R,56A,67.1R,533,533.1,542 ;493/303,305,306,273,274,278 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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586234 |
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Oct 1933 |
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DE |
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2224502 |
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Dec 1973 |
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DE |
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3317370 |
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Dec 1984 |
|
DE |
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54-4806 |
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Jan 1979 |
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JP |
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1324183 |
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Jul 1973 |
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GB |
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Other References
Greiner, Tappi Press, vol. 64, No. 10, Oct. 1981--"The Automation
of Roll Set Changes on Fast Winders". .
Jagenberg Technical Information (T.I.) Brochure on Vari-Step Double
Support Roller (with translation). .
Vari-Dur Product Brochure on Jagenberg Rolling Machine (with
translation)..
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Primary Examiner: Engel; James J.
Attorney, Agent or Firm: Breiner & Breiner
Claims
Having thus described the invention, what is claimed as new and
desired to protect by Letters Patent are the following:
1. .[.In an.]. .Iadd.An .Iaddend.apparatus for convolutely winding
.[.of.]. webs of sheet material onto a small diameter core,
.Iadd.comprising .Iaddend.
means for feeding said core in an axial movement toward the
apparatus.[.,.]..Iadd.;.Iaddend.
means for feeding said sheet material toward said core orthogonally
to the direction of .Iadd.axial .Iaddend.movement of said
core.[.,.]. .Iadd.comprising a first winding cylinder and a second
winding cylinder positioned in relation to each other so as to have
an interspace present therebetween through which said sheet
material is fed; .Iaddend.
a core-receiving seat in said apparatus.[.,.]. .Iadd.positioned
adjacent said interspace between said first winding cylinder and
said second winding cylinder on a side from which said sheet
material is fed; .Iaddend .
means for .Iadd.axially .Iaddend.moving said core .Iadd.from a side
of said apparatus .Iaddend.into said core-receiving seat of the
apparatus.[.,.]..Iadd.; .Iaddend.
.Iadd.means for pushing a core perpendicularly to said core's axis
from said core-receiving seat into the interspace present between
said first winding cylinder and said second winding cylinder, said
core crossing said interspace; .Iaddend.and
adhesive-applying means disposed along the axial path of the core
and arranged to apply a single longitudinal strip of adhesive to
said core .Iadd.during axial movement of said core toward said
apparatus but .Iaddend.prior to its insertion into said
core-receiving seat.
2. The apparatus of claim 1, including a pair of spaced-apart
supports for said core in the adhesive-applying area with the
adhesive-applying means disposed between the pair of supports.
3. The apparatus of claim 2 wherein one of said pair of supports is
a continuous moving belt.
4. The apparatus of claim 3 including a pressure-applying belt
arranged in the adhesive-applying section in opposition to the said
continuously-moving belt.
5. The apparatus of claim 1 wherein the adhesive-applying means
includes a rotating disc and an adhesive container, wherein said
rotating disc is arranged to enter the adhesive container and
remove adhesive therefrom and pass it in a grazing manner to the
core passing through the adhesive-applying zone.
6. The apparatus of claim 5 wherein the peripheral speed of the
rotating disc is less than the speed of the core moving through the
adhesive-applying zone.
Description
This application is a Reissue of Ser. No. 236,487, U.S. Pat. No.
4,931,130. .Iaddend.
BACKGROUND OF THE INVENTION
The invention refers to paper converting machines and in
particular, to rewinding or re-reeling machines. They may be from
off-machine paper reels or by reels directly coming from the paper
mill. They unwind the paper at high speed and wind it on small
tubular cores to form logs or rolls of paper web of relatively
small diameter, such as toilet tissue or kitchen towels. The logs
are much longer than the standard toilet tissue roll (approximately
41/2") or the standard kitchen towel (approximately 9") and are
then cut transverse to the axis of the core or log to the rolls of
paper utilizable in domestic or industrial facilities.
Converting machines of the type considered herein are disclosed in
prior art patents such as U.S. Pat. No. 4,327,877 and Italian
Patent 963047 and French Patent 2,193,387.
OBJECTS OF THE INVENTION
A problem with such type of rewinding machines is the feeding of
the tubular cores to the machine and the application of adhesive or
glue on the cores for holding the leading edge of the paper web to
be wound on the core for the formation of the roll. The apparatus
according to the present invention relates to a system which
provides for the fast presentation and feeding of a tubular core
(which has adhesive distributed thereon in a relatively limited
amount although sufficient for the paper retention) and for
stabilizing the initial turn of the length of paper web to be
wound. The apparatus provides a speedy operation which does not
slow down the productivity of the rewinder.
This and other objects and advantages of the invention will be
evident to those skilled in the art from the reading of the
following text.
SUMMARY OF THE INVENTION
In a paper-converting plant, the lightweight, small diameter cores
on which the paper is to be wound generally are manufactured at one
part of the factory and are then fed axially along a conveyor line
to a receiving hopper where a plurality of the long cores are
stored until they are needed on the rewinding machine. At that
time, one of the cores is moved into alignment with the winding
portion of the rewinder machine, and the adhesive is applied to the
core for receiving and holding the leading edge of the paper web to
be wound on the core.
It is preferred that the adhesive is distributed along the surface
of the core while the core is moving axially into position to
receive the leading edge of the web of the paper.
In order to support the core along its axial movement, two
spaced-apart supports are provided, between which the adhesive
applicating mechanism operates.
Because the core advancing mechanism is outside and to one side of
the rewinder, at least one of the supports may consist of a
continuous belt for the advancement and the launch. In the adhesive
application zone, another continuous belt may be provided.
The adhesive application means may be a rotating disc which dips
into an adhesive-storing container and then wipes against the
approaching core. The peripheral speed of the disc is preferably
slightly less than that of the advancing core.
With the above and other objects in view, further information and a
better understanding of the present invention may be achieved by
referring to the following detailed description.
DETAILED DESCRIPTION
For the purpose of illustrating the invention, there is shown in
the accompanying drawings a form thereof which is at present
preferred, although it is to be understood that the various
instrumentalities of which the invention consists can be variously
arranged and organized, and that the invention is not limited to
the precise arrangement and organizations of the instrumentalities
as hereto shown and described.
In the drawings, wherein like reference characters indicate like
parts:
FIG. 1 shows a schematic top plan view of the winder and
core-feeder.
FIG. 2 is a vertical section, parallel to the trajectory of a core
for the side feeding to a winder.
FIG. 3 is a section on line III--III of FIG. 2.
FIG. 4 is a section on line IV--IV of FIG. 2.
FIG. 5 is a fragmentary view along arrow V of FIG. 2.
FIG. 6 is a sectional side view of a rewinder.
FIG. 7 is an enlarged detail of FIG. 5.
According to what is illustrated in FIGS. 1, 2 and 3, numeral 1
generally indicates a hopper or reservoir intended to feed cores to
a vertical lower channel 3, wherein the cores coming from reservoir
1 are stacked on top of each other. The hopper-reservoir 1 is
provided with a suitable agitator 1A to ensure the regular movement
of the tubular cores, made of cardboard of the like, into channel
3. The vertical channel 3 ensures the feeding of cores to a
distributor device which feeds, in succession, one core after the
other to a transfer line for transferring cores to the rewinder.
This hopper 1 is placed at one side of the rewinder (indicated by R
in FIGS. 1, 2 and 6) at a limited distance and sideway with respect
to the direction of the unwinding of the paper web and of the
removal of logs or rolls of paper formed by rewinder R. The
movement of the paper web is indicated by arrow fR in FIG. 1. Cores
are fed to the rewinder in a direction fA at a right angle to
direction fR of paper unwinding and rolls or logs removal, and thus
in the axial direction of said tubular core. The core reaches the
rewinder with the adhesive applied thereon.
At the lower end of channel 3, a distributor is provided consisting
of a member 5 oscillating about an axis 7. Member 5 is driven by a
cylinder-piston system 8 to rotate about the axis 7 in the
direction of arrow f% from the position (shown in FIG. 3 where it
has received core A1 from channel 3. It moves the core in the
direction of arrow f5 to a position of release (A2) from which it
is moved axially to the rewinder R according to the direction of
arrow fA.
At the core position A2, an inclined wall 9 provides support
(theoretically on a single generatrix) for the right lower quadrant
of the core as can be seen by looking at the drawing of the core
section at A2. A second support for the left lower quadrant of the
core (when looking at the core A2 in FIG. 3) is provided by the
upper portion of a transferring belt 12. The motion of member 5 is
a reciprocating motion for the successive feeding of cores from
position A1 to position A2. During the movement of member 5, a
suitably arcuated profile having its center on axis 7 keeps the
column of cores within channel 3. The distribution 5 preferably is
made up of two or more elements, one to ensure the smooth transfer
of the core, and the other to ensure the positive support of the
core column within channel 3.
The inclined wall 9 extends the entire length of the apparatus up
to the rewinder R. The transfer belt 12 is driven between a
transmission pulley 14, which may be adjustable for tensioning, and
an adjustable return pulley 16. Pulley 16 is located close to the
structure of rewinder R, and the axial displacement of the core by
the upper section of belt 12 (in the direction of arrow f12)
advances the core to the rewinder, being launched by belt 12.
As the core is transferred to the rewinder, it is pushed from the
hopper reservoir 1, past the glue applicator 18 (which is between
the rewinder and the core reservoir-hopper 1). Belt 12 is further
driven around a motive pulley 20 and around transmission pulleys 22
and 24. Moreover, the active upper portion of belt 12, slides over
a supporting surface. In particular, one supporting surface may
extend along the adhesive application group 18 in order to overcome
the effect of belt 26 which is disposed with its own active lower
portion in a position opposite to the active upper portion of belt
12. This ensures the core advancement in the direction of arrow
f12. Belt 26 is driven between pulleys 28, 30 and 32, the latter of
which may be motive and driven by the same motor 34 which drives
also the pulley 20. The movements of the transfer belt 12 and of
the opposing belt 26 are intermittent and suitably synchronized
with the operating cycle of rewinder R, which must receive a core,
having adhesive thereon, before the start of every cycle for the
formation of a log or roll in the rewinder, as is well known in the
art.
The core at position A2 (FIG. 3), resting on belt 12 and on
inclined wall 9, is made to advance by movement of said belt 12 and
to pass it through the adhesive-dispensing group 18 wherein the
opposing belt 26 is also located, which belt 26 ensures the axial
push on the core passing therein at the position indicated by A3
(see FIG. 4). Upon the transit through the adhesive applicator 18,
the core, positioned at A3, is supported all the time by the
reclined wall 9 and the belt 12 spaced apart to a limited extent in
order to leave a space less than the cross-section of the core
where the application of adhesive takes place.
For the application of the adhesive, a disc 42 is provided which is
able to rotate by a continuous motion with a peripheral speed which
may be less than the core advancement speed at the position A3. In
any case, the relative speeds give rise to a mutual rubbing of the
disc periphery and the core lower zone, so as to allow the disc to
effectively apply the adhesive to the core in a uniform way and in
relatively limited amounts. Disc 42 is arranged to dip into an
adhesive container 44 which can be suitably stirred and kept at a
desired level to make sure that disc 42 picks up a predetermined
amount of adhesive at every revolution. Scraper means may also be
provided to ensure the distribution of a constant amount of
adhesive. Clearly, with such an arrangement, the adhesive is
applied because of the movement of the core by belt 12 along a
lower longitudinal portion, with respect to the location of the
core between support 9 and the upper active position of belt
12.
The core that has received the adhesive reaches the rewinder R and
is directly inserted in axial direction (see arrow f12) with a
continuation of the movement allowing same core to be timely
positioned and thus in condition to be inserted between the
cylinders of the winding system of the rewinder.
FIGS. 6 and 7 show schematically a feasible embodiment of the
system for the winding of the paper web intended to form a log roll
on the core. As these rewinders are of various and known type, only
the main elements will be herein described.
As can be seen in said Figures, the core reaches, from the dwell
position A4 (FIG. 5) immediately at the side of rewinder R, the
position A5 (FIG. 7) inside the rewinder where it is axially pushed
along a guidewall 59, which is the continuous extension of wall 9.
Wall 9 starts from below the hopper of reservoir 1, and past a wall
60 which faces wall 59 and is spaced therefrom a distance
substantially equivalent to that of the upper branch of belt 12.
Walls 59 and 60 may be the continuation of wall 9 and of the upper
branch of belt 12, thereby the core, from the stand-by position
immediately adjacent the rewinder R, is axially pushed into the
seat located inside the rewinder and defined by walls 59 and 60.
The spacing between walls 59 and 60 corresponds to the zone of core
5 where the latter is supplied with adhesive, as indicated by C in
the various Figures.
It should be noted that wall 60 is slightly displaced and away from
wall 59 with respect to the position taken up by the active
position of belt 12 relative to wall 9. This permits space for a
set of fingers 62 intended for pushing the core from position A5 up
to the position where the winding begins. The fingers 62 have the
form for blades and may also be partially disposed in slots formed
in the wall 60. Fingers 62 are relatively thin at their ends in
order to reduce as far as possible the interference surface made up
of said ends with respect to the strip of adhesive C that might rub
on fingers 62 at the rotation start of core 5 inserted for the
winding.
When in position A5, the core is pushed at the precise moment by
fingers 62 into the interspace between two cylinders 64 and 66
making part of the group for the winding of paper web N on the
cores. Web N comes from the reel of two-fold web or from one or two
reels of web coming from the paper mill, and is diverted by
suitable pulleys and fed to cylinder 66 which rotates according to
the arrow indicated on roll 66 in FIG. 6. On cylinder 66, the web
is perforated and then moved towards the groove between the same
cylinder 66 and cylinder 64 where the core is inserted from
position A5 so as to cause the winding of the web on the core in
order to form a log or roll indicated by BS in FIG. 6. The log or
roll BS is formed resting on cylinders 66 and 64 and with a
progressive removal therefrom, the winding being controlled by a
presser roller 68. Upon completion of the winding for the formation
of a log or roll BS, the roll moves away and a new core is inserted
from position A5 into the interspace between the two cylinders 64
and 66 for the restart of a new winding.
It should be noted that the core A5, inserted by means of the
fingers 62 into the interspace between said cylinders 64 and 66, is
initially made to roll on wall 59, thus reaching the zone of
minimum distance between the two cylinders 64 and 66 when the zone
of adhesive C comes into contact with paper web N and moves forward
together with roller 66 and onto roller 64. Accordingly, the strip
of adhesive is made to act on the paper web which must be retained
on the core by said adhesive for starting the winding of the web
thereon. Therefore, the adhesive does not come into contact with
any of the rewinder members except, and only to a limited extent,
with the ends of fingers 62 which are of limited dimension and,
moreover, are in any case continuously cleaned by the subsequent
cores being pushed into the winding zone, and thus without any risk
of accumulation of adhesive on the ends of fingers 62.
After each insertion of a core from position A5 into the interspace
between cylinder 64, 66, fingers 62 return between walls 59 and 60,
and a new core can be pushed from the position A4 by belt 12 to
reach the position A5. The time for this transfer is practically
the time for the formation of a roll or log BS, and thus is a time
sufficient for performing all the operations with sufficiently
limited velocity, acceleration and deceleration in order to achieve
the feeding of longitudinally glued cores with absolute regularity
for the rewinder operation.
It is furthermore to be understood that the present invention may
be embodied in other specific forms without departing from the
spirit or special attributes; and it is, therefore, desired that
the present embodiments be considered in all respects as
illustrative and, therefore, not restrictive, reference being made
to the appended claims rather than to the foregoing description to
indicate the scope of the invention.
* * * * *