Image reading apparatus for book-like document or the like

Details Image reading apparatus for book-like document or the like Image reading apparatus for book-like document or the like

1996-11-22

1998-09-08

Pendegrass, Joan H.

Photocopying

Projection printing and copying cameras

Copying both sides of original

358474, H04N 100

Patent

active

058052720

ABSTRACT:
An image reading apparatus which reads out a document placed face-up by scanning optically from above the document, having a document change detection means, and when a document is not changed, a reproducted image density is controlled by using a previous result of the document ground brightness detection without detecting newly. Further, an image reading section is arranged on a document table which a bookform document is placed upward and an auto-document feeding unit for conveying a sheetform document is provided, where by a conveyed sheetform document is read out by a sensor at a fixed focal position.

REFERENCES:
patent: 5084611 (1992-01-01), Okisu et al.
patent: 5194729 (1993-03-01), Okisu et al.
patent: 5416609 (1995-05-01), Matsuda et al.
patent: 5616914 (1997-04-01), Matsuda

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