Line skip system for facsimile device

Details Line skip system for facsimile device Line skip system for facsimile device

1974-10-10

1976-01-06

Mayer, Albert J.

Telegraphy

Systems

Simplex-reversing periodic

178 6, 178DIG3, H04N 138

Patent

active

039314642

ABSTRACT:
A document for transmission has ruled lines such as borders printed at predetermined locations thereon which do not constitute usable information. The main scan direction is perpendicular to the ruled lines. Each main scan line is pre-scanned to determine if the line contains information other than the ruled lines, and the main scan line is scanned again for transmission if information is encountered and skipped if information is not encountered. A gating signal is generated in synchronism with the pre-scanning step, but the gating signal is suppressed while the portions of the main scan line intersecting the ruled lines are being pre-scanned. If the gating signal and electrical signals resulting from pre-scanning usable information contained in the main scan line are sensed simultaneously, the line is scanned for transmission.

REFERENCES:
patent: 3621130 (1971-11-01), Habbal
patent: 3646257 (1972-02-01), Epstein et al.
patent: 3670099 (1972-06-01), Oliver
patent: 3730988 (1973-05-01), Shimizy

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