Electrophotography – Diagnostics – Document handling
Reexamination Certificate
2005-10-25
2005-10-25
Chau, Minh (Department: 2854)
Electrophotography
Diagnostics
Document handling
C399S016000, C217S074000, C217S00300C
Reexamination Certificate
active
06959155
ABSTRACT:
A system and method for judging a paper jam condition in a device, such as an image forming apparatus, including the steps of checking a feed sensor unit, operating a timer, and if it is judged that the feed sensor unit is switched to an “ON” state, calculating a value T1for a fuse lamp drive unit of the apparatus to be in an “ON” state. The system and method then directs a comparison of the value T1with a reference value T2, and judges a paper jam condition exists and aborts a printing operation if the value T1is out of an error range of the T2. The paper jam condition is detected through the use of a feed sensor unit and monitoring of the fuser control, therefore a discharge sensor unit is not required at a discharging side of the image forming apparatus for sensing the paper jam condition.
REFERENCES:
patent: 5563686 (1996-10-01), Beaufort et al.
patent: 5580046 (1996-12-01), Beaufort et al.
patent: 5615876 (1997-04-01), Yergenson et al.
patent: 5678123 (1997-10-01), Kim
patent: 6782214 (2004-08-01), Hoberock et al.
Chau Minh
Roylance Abrams Berdo & Goodman L.L.P.
Samsung Electronics Co,. Ltd.
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