Document vacuum weir system

Details Document vacuum weir system Document vacuum weir system

1980-01-10

1981-10-13

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for original

198689, 198844, 226 95, 271197, 355 91, G03B 2762, G03B 2764

Patent

active

042945399

ABSTRACT:
In a document handling system in which an apertured vacuum belt transports the documents to the imaging station of a copier and provides a light reflective background surface, the belt vacuum apertures are only within discrete limited areas of the belt and have a convoluted surface which holds the document spaced from the vacuum apertures and provides low impedance air flow under the document from the apertures, said areas being substantially enclosed by narrow border areas of unapertured and non-imageable pneumatic weirs at positions corresponding to the edges of conventional sizes of documents, which weirs are finely convoluted to have a much higher air flow impedance.

REFERENCES:
patent: 3123354 (1964-03-01), Ungerer
patent: 3425610 (1969-02-01), Stewart
patent: 3452982 (1969-07-01), Bischoff
patent: 3477558 (1969-11-01), Fleischauer
patent: 3583614 (1971-06-01), Foster, Jr.
patent: 3677643 (1972-07-01), Sagawa
patent: 3754826 (1973-08-01), Kobayashi et al.
patent: 3863912 (1975-02-01), Korff
patent: 3910570 (1975-10-01), Bleau
patent: 4008956 (1977-02-01), Stemmle
patent: 4043665 (1977-08-01), Caldwell
patent: 4047812 (1977-09-01), Hogan
patent: 4179215 (1979-12-01), Hage
patent: 4236814 (1980-12-01), Tonkin

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