Winding – tensioning – or guiding – Convolute winding of material – With cutting – perforating – or notching
Reexamination Certificate
1999-11-09
2001-07-17
Jillions, John M. (Department: 3653)
Winding, tensioning, or guiding
Convolute winding of material
With cutting, perforating, or notching
C242S531000, C242S533000, C242S547000
Reexamination Certificate
active
06260786
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a winder for a sheet material such as a film or the like, and more particularly, to a multi-shaft linear motion type winder for winding up a film or the like without using a turret.
2. Description of the Related Art
When a film being fed from the film making step is wound up on a winding core in a given length, roll changing is performed from the core having thereon the wound-up film to a new winding core.
Hitherto, a two-shaft (A,B) turret T as shown in
FIGS. 4A
to
4
D, on which one shaft with fully-wound roll and the other shaft for a new winding core are installed together, or a multishaft turret has been used, and consequently, the roll changing work has been conducted by turning the turret T every time the winding process is finished.
That is, in the state illustrated in
FIG. 4A
, a shaft A is in the course of winding while a shaft B is being attached with a new winding core. A film F is wound via a guide roller onto a winding core on the shaft A by reason of a contact pressure of a touch roller
7
. When the winding core of the shaft A is nearly fully wound thereon, the turret T is revolved as shown in
FIG. 4B and a
new core on the shaft B is shifted to a winding position. At that time, a cutting blade
9
is lowered to sever the film running between the shaft A and the shaft B, and the leading end of the film is wrapped around the new core on the shaft B. The winding-up process to the shaft A is thus stopped (FIG.
4
C). Then, when a winding process to the new core on the shaft B is started, a new core is attached to the shaft A (FIG.
4
D). In this way, one cycle of the winding process on the conventional turret is completed and the roll changing work for the next winding cycle is initiated.
With the foregoing winding that the roll changing work is conducted by the use of a turret, however, the size of the turret to be used is determined by a distance between centers of the winding shafts, depending upon the winding diameter of a roll, and hence, the higher the winding diameter is, the bigger the size of the turret. As a consequence, the winding machine is inevitably large-sized as the winding diameter is larger, and the production cost is vastly increased, as well.
Further, when the distance between the winding shafts is larger, the path length of the film upon roll changing is longer, which is responsible for the occurrence of neck-in and wrinkling of a film susceptible to extension. Again where the distance between the winding shafts is larger, the moving distance of a new winding core upon roll changing is larger, and consequently, it is difficult to change over to a next winding in a short cycle.
As for the aspect of transmissions of the turret lathe system, because the winding shafts are disposed inside the turret lathe and winding motors for respective shafts are installed outside the winding frame, their powers are necessitated to be transmitted to the winding shafts, relaying a main shaft of the turret during turning. This requires a large-sized tranmission device, brings about a large loss in the revolution mechanism, and raises a big problem in the control of transmission torques required for the winding shafts.
In order to cope with the aforesaid difficulties encountered in the conventional winder, the present invention has been accomplished by finding a linear motion type winder based on a different idea from the conventional turret system. Accordingly, it is an essential object of the invention to provide such a linear motion type winder that winding shafts can move linearly fore-and-aft and up-and-down and independently to the extent that no mutual interference is involved. A more particular object of the invention is to provide a linear motion type winder that enables it to eliminate the mechanical
1088
by simplifying the transmission device, to make the film path length upon roll changing shorter, to avoid the neck-in and wrinkling of an extensible film, and to diminish significantly the cycle of roll changing operations.
SUMMARY OF THE INVENTION
The invention for attaining the aforementioned objects resides in a two-shaft linear motion type winder for winding up a film or the like which comprises:
at least an upper main frame and a lower main frame disposed in a diametrically opposed manner at a required distance spaced apart; a pair of upper-stage winding frames provided with holding members for holding an upper winding shaft therebetween to be capable of ascending and descending vertically, each upper-stage winding frame being suspended from the upper main frame to be at least slidingly movable along the upper main frame in the frontward and backward directions between a winding position and a removal position of a full roll; a pair of lower-stage winding frames provided with holding members for holding therebetween a lower winding shaft to be capable of ascending and descending vertically, each lower-stage winding frame being disposed on the lower main frame to face upwards so as to be at least slidingly movable along the lower main frame in forward and backward directions between the winding position and the roll removal position, the upper-stage and lower-stage frames and the holding members for the upper and lower winding shafts being respectively located to be individually movable back and forth, and up and down without interfering with each other; a touch roller disposed in the vicinity of the winding position so that upon full winding, the full roll on the one winding shaft may be moved by press contact with the touch roller from the winding position to the removal position while the other winding shaft is moved to the winding position, thereby to attach a new winding core; and a cutting blade, disposed between the touch roller and the winding shaft during winding, with which to sever the film running between the full roll and the new core, concurrently while wrapping a leading end of the film around the new core.
Operation of the Winder
With the winder pertaining to this invention, the winding work is carried out in accordance with the following operation:
The winder is based on a different system from a turret system firstly in that two winding shafts move straightforwardly fore and aft and ascend and descend up and down independently to the extent that they don't interfere with each other.
Further, upon roll changing to a next winding, for instance, where the lower-stage winding shaft is in the course of winding, the upper-stage winding shaft holds a next winding core. And when fully wound up, the lower-stage winding shaft retreats and the new winding core on the upper-stage winding shaft begins to advance to come into contact with the film, which is leaving from the core on the lower-stage winding shaft, and the cutter, located in the vicinity, cuts the film, whose leading end is wrapped around the new core on the upper-stage winding shaft and whose trailing end is secured around the roll on the lower-stage winding shaft.
The winding core on the lower-stage winding shaft leaves from the cutting position to move an area in which the new core on the upper-stage winding shaft can move to the winding position. The winding on the lower-stage winding shaft is thus stopped.
Then, winding on the upper-stage winding shaft is performed in the same procedure and sequence as described above. Winding is repeated sequentially by means of the upper-stage and lower-stage winding shafts in this way and the film continuously fed is wound up continuously on winding cores.
REFERENCES:
patent: 2663511 (1953-12-01), Stevens
patent: 4374575 (1983-02-01), Lerch et al.
patent: 4431142 (1984-02-01), Kataoka
patent: 4697755 (1987-10-01), Kataoka
patent: 5620151 (1997-04-01), Ueyama et al.
Flynn ,Thiel, Boutell & Tanis, P.C.
Fuji Tekko Co., Ltd.
Jillions John M.
LandOfFree
Winder for sheet material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Winder for sheet material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Winder for sheet material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2555575