Document scanner and vacuum table therefor

Details Document scanner and vacuum table therefor Document scanner and vacuum table therefor

1994-11-02

1996-01-23

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

355 73, 355 75, 355 76, H04N 104

Patent

active

054869323

ABSTRACT:
A vacuum table (10) for holding a document in position e.g. during scanning comprises a supporting surface (11) and a vacuum distribution line (13) which, in the absence of such a document, is in gas flow communication with the ambient atmosphere over a vacuum zone (A, B, C, D) on the table surface (11) via an array of openings (12) distributed over that surface. The table (10) further comprises means (20) such as a flexible curtain for obstructing such gas flow communication over a selected length of such array of openings (12) whereby the length (A, B) of the vacuum zone (A, B, C, D) may be matched to the length of a said document, and means (32) for selectively obstructing such gas flow communication over the width of the array whereby the width (B, C) of the vacuum zone may be matched to the width of such document.

REFERENCES:
patent: 3335794 (1967-08-01), Cocito
patent: 3551048 (1968-10-01), Hoffman
patent: 3597078 (1967-11-01), Miyauchi
patent: 4586815 (1986-05-01), Hoshino et al.
patent: 4619526 (1986-10-01), Hougaard
patent: 4669870 (1987-06-01), Fosh

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