Electrophotography – Control of electrophotography process – Responsive to number of copies or passage of time
Patent
1996-05-30
1998-10-20
Lee, Shuk
Electrophotography
Control of electrophotography process
Responsive to number of copies or passage of time
399361, G03G 2100
Patent
active
058261354
ABSTRACT:
A method for controlling paper feeding is performed in an image forming apparatus having a feeding sensor for sensing paper feeding states and for generating a sensing signal that sequentially shifts between first and second states during the paper feeding. The method contemplates the steps of picking up and feeding a sheet of paper in response to a printing command; determining whether a predetermined time period has elapsed since the sheet of paper was picked up; after the predetermined time period has elapsed, detecting when the sensing signal shifts to the first state; after the sensing signal shifts to the first state, detecting when the sensing signal shifts to the second state; after the sensing signal shifts to the second state, starting a counting operation and detecting when the sensing signal shifts back to the first state; after the sensing signal shifts back to the first state, comparing a present counting value generated from the counting operation with a reference value; when the present counting value is less than the reference value, returning to the step of detecting when the sensing signal shifts to the second state; and when the present counting value is greater than or equal to the reference value, performing a normal image forming operation.
REFERENCES:
patent: 4804998 (1989-02-01), Miyawaki
patent: 5321485 (1994-06-01), Nukaya
patent: 5485247 (1996-01-01), Morishita et al.
patent: 5489970 (1996-02-01), Nishida
patent: 5494356 (1996-02-01), Mikida
Bushnell Esq. Robert E.
Lee Shuk
Samsung Electronics Co,. Ltd.
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