Printing system and method automatically detecting paper length

Details Printing system and method automatically detecting paper length Printing system and method automatically detecting paper length

1997-01-10

1999-04-06

Milef, Boris

Sheet feeding or delivering

Feeding

Separator and conveyor

271259, 27125804, 27126502, B65H 500, B65H 702

Patent

active

058907084

ABSTRACT:
A printing system which can automatically detect the length of paper fed into the system and control the system based upon the detected length of the paper. The printing system has a paper driver for conveying papers loaded at the initial stage of printing by a preset step unit in response to a conveyance control signal, and a paper feeder for outputting loaded paper size selection information and feeding the loaded papers to the initial stage of the paper driver in response to a paper feed control signal, a paper sensor located on a forefront of the paper driver which detects the leading and trailing ends of the paper, and a controller for outputting the paper feed control signal in response to a printing command, allowing the printing operation, outputting the conveyance control signal, transferring the paper, counting the number of transfer steps in an interval where a paper detection signal is enabled, calculating the counted number as paper length, comparing the value of paper length with a value of a paper length corresponding to the paper size selection information, and completing the printing operation.

REFERENCES:
patent: 4939676 (1990-07-01), Worsley et al.
patent: 5464204 (1995-11-01), Suzuki
patent: 5580046 (1996-12-01), Beaufort et al.

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