Document deskewing system

Details Document deskewing system Document deskewing system

1982-08-02

1984-01-31

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3SH, 271245, G03G 1500

Patent

active

044286660

ABSTRACT:
In a document sheet feeding and registration apparatus for deskewing a document sheet relative to a desired copying position on a copier platen while feeding the document sheet onto the platen into said copying position, there is disclosed a method and apparatus including obtaining an electrical signal corresponding to the actual velocity of the document sheet being fed onto the platen, and actuating an automatic document sheet deskewing device at a precise actuating time occurring slightly before the document sheet reaches the copying position, so that the actuating time of said document sheet deskewing corresponds to the actual velocity of the document sheet. The electrical signal corresponding to the actual document sheet velocity may be obtained by counting the elapsed time between the actuation of first and second switches substantially spaced from one another along the document sheet path upstream of the copier platen. The actuating time of the document sheet deskewing device may be a resettable time delay count after the actuation of said second switch, which time delay count is resettable by a change in the counted time period between the actuation of said first and second switches. The automatic document sheet deskewing device may comprise a releaseable skew preventing document feeder releasing the document sheet at said actuating time to another feeder for briefly driving the document sheet into a registration aligning edge while freely allowing deskewing movement of the document sheet thereagainst after said actuating time.

REFERENCES:
patent: 3072397 (1963-01-01), Kelchner
patent: 3633902 (1972-01-01), Worden
patent: 3865482 (1975-02-01), Bendall
patent: 3889943 (1975-06-01), Krayer
patent: 4076233 (1978-02-01), Knight et al.
patent: 4076408 (1978-02-01), Reid et al.
patent: 4084900 (1978-04-01), Yamaoka et al.
patent: 4097146 (1978-06-01), Sasamori
patent: 4098551 (1978-07-01), Komori et al.
patent: 4132401 (1979-01-01), Gauronski et al.
patent: 4171128 (1979-10-01), Irvine et al.
patent: 4183519 (1980-01-01), Harris
patent: 4213603 (1980-07-01), Peffer et al.
patent: 4266762 (1981-05-01), Kramer et al.
patent: 4270746 (1981-06-01), Hamlin
patent: 4278344 (1981-07-01), Sahay
patent: 4322160 (1982-03-01), Kobus
patent: 4334759 (1982-06-01), Clausing
patent: 4335949 (1982-06-01), Kukucka et al.
patent: 4335954 (1982-06-01), Phelps
patent: 4358197 (1982-11-01), Kukucka et al.

Affiliated with

Also associated with

Rating

Document deskewing system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Document deskewing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Document deskewing system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2343615