Sheet feeding or delivering – Delivering – To receiver for pack of sheets
Patent
1992-03-19
1994-06-07
Bollinger, David H.
Sheet feeding or delivering
Delivering
To receiver for pack of sheets
B65H 2966
Patent
active
053182880
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method and apparatus for processing sheets, particularly a series of successive textile sheets in a continuous or semi-continuous operation.
In clothing manufacture, it is often necessary to process series of successive sheets. Processing can comprise one or more operations such as hemming the sheets, positioning, joining, turning over or reversing, folding etc. It is an important requirement that these sheets arrive in the processing station in an appropriate predetermined position so as to be able to carry out the intended operation correctly. Numerous attempts have already been made to meet this. In particular, the present applicant has developed systems for removing sheets one by one from a stack and feeding these in an appropriate position to some processing unit. Generally, these sheet stacks come directly from the cutting shop of the clothing workshop.
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 the present 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 stacked again on 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 said machine is as yet less usable as automatic feeder of already partly processed sheets to a second or following processing unit.
It is in principle suggested in U.S. Pat. No. 3,729,959 to feed a textile washing installation at its inlet side with successive sheets from a belt roll between the windings of which the sheets are stored. During this unstacking, the sheets are released from the belt roll beyond a clamping line. After being processed in the washing machine the sheets are piled up one on top of the other in stacks.
It is now an object of the invention to provide i.a. a method, apparatus and equipment for processing a series of successive sheets that makes it possible to avoid a conventional stacking operation in piles of (completely overlapping) sheets laid on top of each other. In addition, it is an object of the invention to provide such a processing method and apparatus the construction of which is simple and, hence, not expensive and that is, nonetheless, readily adaptable to various processing needs. These objectives are met by providing a method comprising i.a. a stacking operation whereby a series of successive sheets are arranged one by one next to each other and are collected in this arrangement. Here, the terms "next to each other" mean completely separated from each other in each other's vicinity as well as partially overlapping. The arrangement and conveyance during the collection proper at the outlet of the processing unit is effected by the successive clamping of the sheets beyond a clamping line between the successive windings of a belt to be spirally wound from a stock as carrier and collecting element for the sheets. The belt is conducted with or without sheets along a predetermined route or path to a second storage place. The clamping or pinching line of the roll is here to be understood as referring to the place where the sheet is caught between two winding sections of the belt or released from there.
In summary the restacking of sheets into piles is avoided according to the invention by providing a method for processing supple sheets comprising feeding a series of successive sheets to a processing unit by releasing them from the successive win
REFERENCES:
patent: 3981495 (1976-09-01), Bijttebier
patent: 4348018 (1982-09-01), Bijttebier et al.
patent: 4437655 (1984-03-01), Bijttebiere et al.
patent: 4528798 (1985-07-01), Meier
patent: 4572499 (1986-02-01), Bijttebier et al.
patent: 4676496 (1987-06-01), Honegger
patent: 4697400 (1987-10-01), Gerber
patent: 4903908 (1990-02-01), Hansch
Byttebier Gaspar A.
Lefebvre Hendrik
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