Bi-directional optical scanning

Details Bi-directional optical scanning Bi-directional optical scanning

1977-07-29

1979-04-24

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358212, 358294, H04N 110

Patent

active

041508734

ABSTRACT:
An optical document scanning device minimizes the time period between the end of one page scan and the beginning of the next page scan by page scanning in opposite directions during successive scan cycles. During each scan cycle, the optical image of the document is converted into a serial electric signal which is arranged by appropriate logic and storage devices so as to be presented to an output device, such as a printer, in a uniform page scan direction, e.g. top to bottom, regardless of the direction of page scan input.

REFERENCES:
patent: RE28016 (1974-05-01), Koizumi
patent: 3524928 (1970-08-01), Hoskins
patent: 3528738 (1970-09-01), Hodges
patent: 3830972 (1974-08-01), McHugh et al.
patent: 3886371 (1975-05-01), Lloyd

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