Stack forming device

Details Stack forming device Stack forming device

1976-04-26

1977-11-01

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Delivering

With transfer means between conveyor and receiver

271 80, 271178, 271184, 271195, 271196, 271211, 271224, B65H 2922, B65H 2924

Patent

active

040562646

ABSTRACT:
The stack forming device according to the invention comprises a traction surface which is rotatably driven. The portion of the trailing edge of a sheet to be stacked is kept in contact with the traction surface so that the trailing edge of the sheet is displaced in synchronism with said surface. This displacement is carried out over a period which follows the abutment of the leading edge of the sheet against a stop provided on a stacking platform. As a consequence the sheet acquires a convex configuration and is finally propelled against the platform or the preceding sheet after release by the traction surface. The device may be equipped with supplementary blowers in order to facilitate the release from the traction surface. It is of particular interest for high speed stacking of photographic film sheets, preferably double-side coated ones.

REFERENCES:
patent: 2237429 (1941-04-01), Harrington
patent: 2615714 (1952-10-01), Ford
patent: 2645480 (1953-07-01), Long
patent: 3052467 (1962-09-01), Fertig
patent: 3545746 (1970-12-01), Ledger et al.
Bach, P. S. "Paper Inserter and Stacker Bin", IBM Technical Disclosure Bulletin, vol. 17, No. 9, Feb. 1975, pp. 2535, 2536.
Agfa Gevaert, "Sheet Guides", Research Disclosure, No. 112, Aug. 1973, pp. 21, 22.

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