Copying machine having an automatic document feeder with origina

Details Copying machine having an automatic document feeder with origina Copying machine having an automatic document feeder with origina

1993-03-18

1994-06-21

Fuller, Benjamin R.

Photocopying

Contact printing

Light boxes

355317, 271256, 271258, 271 3, G03G 2100

Patent

active

053232194

ABSTRACT:
A copying machine is equipped with an automatic document feeder, which separates documents in a document storing section and feeds them one by one onto a platen glass. The documents are stopped at an exposure position by a document conveyance stopper, where they are exposed and scanned by an exposure scanning device, and then delivered to a document delivery tray. A sensor is provided in a feeding path of the document feeder, for detecting a leading edge or a trailing edge of the document. A delaying device for delaying a drive source stopping signal of the document conveyance stopper is outputted after a predetermined period of time has passed, or after a predetermined number of pulses have been counted after the document leading or trailing edge signal outputted from the sensor has been received. A detection device detects the documents actual stopping position and a signal is output after the drive source stopping signal of the document conveyance stopper has been generated. A controller controls the generation of a signal for the recording sheet conveyance operation. The start signal occurs at a time which corresponds to the driving of the exposure scanning device, as adjusted based on a detection at the actual document stopping position by the detection device. The document stopping position is at the location on the platen where the motor drives and transports the original plus the distance that the sheet is carried by inertia.

REFERENCES:
patent: 4455018 (1984-06-01), Colglazier et al.
patent: 4579444 (1986-04-01), Pinckney et al.
patent: 4791451 (1988-12-01), Hirose et al.
patent: 4809969 (1989-03-01), Bastow et al.
patent: 5056775 (1991-10-01), Kida
patent: 5086319 (1992-02-01), Carolan

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