Sheet feeding or delivering – Feeding and delivering – Sensor located at the feeder and controls the delivering
Patent
1995-01-31
1996-12-03
Bollinger, David H.
Sheet feeding or delivering
Feeding and delivering
Sensor located at the feeder and controls the delivering
271 317, 271 402, 271 403, 271 1002, 271 1003, 271110, 271259, 27126502, B65H 522
Patent
active
055800467
ABSTRACT:
Paper processing equipment such as a laser printer uses a plurality of sensors to detect the presence of paper in the paper path of the equipment. In order to provide an appropriate response to different types of malfunctions, a determination of the type of malfunction is made, and in appropriate cases, an attempt is made to self-clear the malfunction. In the case of a paper size error resulting from long size sheets being provided without a corresponding software request, the printer senses a time delay resulting from paper passage of an initial sheet. Pick of a second sheet is delayed for a time period corresponding to long size sheet passage and picks of subsequent sheets are delayed only if the sensed time delay corresponds to the longer length. This paper length information is further used to provide information regarding proper discharge of sheets from the printer.
REFERENCES:
patent: 3948510 (1976-04-01), Iwamoto et al.
patent: 5156385 (1992-10-01), Muto et al.
patent: 5464204 (1995-11-01), Suzuki
Beaufort Richard F.
Chung Jerry Y.
Bollinger David H.
Hewlett--Packard Company
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