Scanner

Details Scanner Scanner

1997-02-20

1999-10-05

Chang, Jon

Facsimile and static presentation processing

Facsimile

Picture signal generator

382313, H04N 1024

Patent

active

059633433

ABSTRACT:
When the scanner moves over the subject copy, the first reading elements of a close contact type image sensor (1) read the copy. As the movement causes a platen roller (5) to rotate, an encoder ring (4), having a prescribed distinguishing pattern (10) printed within, rotates. Second reading elements configured outside the copy reading range of the close contact type image sensor (1) read the distinguishing pattern, which moves over the reading face as the encoder ring (4) rotates. The second reading elements which read the distinguishing pattern are driven independently of the first reading elements for reading the subject copy, and their reading period is shorter than that of the first reading elements. This configuration enables the moving speed to be accurately detected even when the scanner moves faster than the copy reading speed.

REFERENCES:
patent: 4387374 (1983-06-01), Wiener
patent: 4523235 (1985-06-01), Rajchman
patent: 4684998 (1987-08-01), Tonioka et al.
patent: 4862512 (1989-08-01), Hidaka et al.
patent: 4959871 (1990-09-01), Mori et al.
patent: 5084773 (1992-01-01), Yonenaga
patent: 5369271 (1994-11-01), Nyui
patent: 5475503 (1995-12-01), Huang et al.

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