Sheet feeding or delivering – Feeding and delivering – Continuous endless conveyors
Patent
1994-02-23
1996-03-12
Skaggs, H. Grant
Sheet feeding or delivering
Feeding and delivering
Continuous endless conveyors
271272, 271275, 271198, 271202, 271200, 271300, 271216, 271902, 1984701, 198586, 198604, B65H 2966
Patent
active
054979854
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method and apparatus for processing sheets, particularly a series of successive textile sheets. In clothing manufacture it is often necessary to process and treat series of successive sheets. Processing can comprise one or more operations, such as hemming the sheets, positioning, joining, turning over or reversing, folding, etc. Up to now the majority of the machines must be repeatedly fed manually. This requires many operating personnel and considerable in-process stocks of sheet stacks at each processing unit. At the same time, these in-process stocks takeup a significant amount of space in the workshop.
Numerous attempts have already been made to do something about this. In particular, applicant has developed systems for removing sheets one by one from a well ordered stack and feeding them in the correct position to one or more processing units. These sheet stacks generally come directly from the cutting room in the clothing manufacturing workshop. With a well ordered stack is meant hereinafter a stack wherein the sheets are ordered in an essentially completely overlapping arrangement with the same orientation. Such systems are known for instance from U.S. Pat. Nos. 3,981,495, 4,348,018, 4,437,655 and 4,572,499 of applicant. Now, when these sheets leave this processing unit one by one to undergo a supplementary operation in a following station, they generally need to be collected or restacked one way or the other. During this restacking operation, they then have to be collected or brought together again as precisely as possible in the desired position with a view to a smooth supply to this following processing station. Assuming that the processed sheets, delivered by a first processing unit, can be automatically stacked on top of each other in a smooth and precise way in a form analogous to that of original stacks that come from the cutting shop, a machine in accordance with U.S. Pat. No. 4,572,499 would be well suitable for a supply to a second (and following) processing station. This automatic precise stacking is a problem, however, so that the machine is as yet less usable as automatic feeder of already partly processed sheets to a second or following processing unit.
Therefor, applicant has designed a useful winding apparatus in which the successive sheets are clamped between the successive windings of a belt roll as a storage or stacking device for these sheets. This apparatus and its application in the processing of textile sheets is thoroughly described in patent application PCT/BE 90/00052 (WO 91/04214). Although this apparatus already provides for a flexible means of storing the sheets, in certain cases the disadvantage still remains that is inherent in the fact that the first sheet taken up always remains inside the winding, a fact which hinders easy accessibility for particular processing requirements. Indeed, if one wants to further process all the sheets in the sequence they were taken up in the winding, then the winding or coil must first be rewound to a second coil. Furthermore, with a winding in operation one must take into account the fact that the diameter (measured from the clamp line) is continuously changing. For example, with a constant sheet inlet and outlet speed, respectively into and out of the windings, the angular velocity of the windings will therefore be continuously changing, which fact can complicate the speed control of the winding drive.
The present invention makes it possible to avoid these disadvantages by providing movable collecting apparatuses and a method for the temporary and partially overlapping storage of successive supple sheets delivered from an ordered stack of sheets or from a processing unit in an apparatus, and more particularly in its storage area between a carrier for the sheets and the clamping means mounted in cooperation therewith, for pressing the sheets over a particular area of the carrier. The compression takes place between the inlet point of the sheets to the carrier and a point further removed, whether along their t
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Byttebier Gaspar A. H.
Lefebvre Hendrik
Byttebier Gaspar A. H.
Skaggs H. Grant
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