Scanner document absence code system

Details Scanner document absence code system Scanner document absence code system

1990-07-27

1992-06-02

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358497, 358498, 235375, 235454, 235462, 235480, 271227, 271258, 355 75, 355230, 355308, H04N 104

Patent

active

051192136

ABSTRACT:
In an electronic imaging system in which a document is electronically imaged on a platen by a scanning electronic imager, a document for which manual handling is desired is manually positioned in a special manual registration position on the platen in which one corner of the document underlies a unique signal generating optical indicia positioned over that corner of the platen. Preferably, this optical indicia is a uniquely numbered bar code pattern on a stationary baffle, or other overlying surface, upstream of the document feeder platen transport, and preferably located in a start of scan area. The electronic imager is at least partially optically occluded from reading that unique bar code pattern by a document present in that manual registration position. (A document for which automatic feeding is desired may be placed in a document feeder and fed thereby onto the platen into a different registration position in which no portion of that document is interposed between that bar code and the imager.) The imager can read, or not read, that unique bar code to provide a unique control signal to control the document feeder and/or provide other desired functions, such as indicating that a previously manually placed document was left on the platen.

REFERENCES:
patent: 3945728 (1976-03-01), Crandell
patent: 4314159 (1982-02-01), Davis
patent: 4357095 (1982-11-01), Sugawa et al.
patent: 4659214 (1987-04-01), Takemura et al.
patent: 4757348 (1988-07-01), Rourke et al.
Xerox Disclosure Journal, vol. 8, No. 2, Mar./Apr. 1983, pp. 161-162, Document Edge Detection Design for a CVT Image Input Module, W. H. Bruce et al.
Xerox Disclosure Journal, vol. 11, No. 1, Jan./Feb. 1986.
Xerox Disclosure Journal, vol. 12, No. 5, Sep./Oct. 1987, pp. 239-240, Sheet on Platen Sensor for Determining Mode Priorities, T. Acquaviva et al.

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