Image forming apparatus with cassette and paper sensing device

Details Image forming apparatus with cassette and paper sensing device Image forming apparatus with cassette and paper sensing device

2008-06-19

2011-12-06

Severson, Jeremy R (Department: 3653)

Sheet feeding or delivering

Feeding

Pack holders

C271S145000, C399S023000

Reexamination Certificate

active

08070153

ABSTRACT:
An image forming apparatus and a printing medium feeding unit thereof are disclosed. The image forming apparatus includes a main body, a cassette removably mounted in the main body to load a printing medium therein, and a sensing unit provided in the main body to sense whether the cassette is mounted in the main body and whether the printing medium is in the cassette. The sensing unit includes a first actuator mounted in the main body to sense whether the printing medium is in the cassette, a second actuator mounted in the main body to sense whether the cassette is mounted in the main body, and a sensor having a sensing part to sense operation of the first actuator and the second actuator. Accordingly, the image forming apparatus can sense whether the cassette is properly mounted in the main body and whether the printing medium is in the cassette, with a simple constitution while minimizing the number of sensors.

REFERENCES:
patent: 4196898 (1980-04-01), Misawa et al.
patent: 4449705 (1984-05-01), Shibuya et al.
patent: 5897112 (1999-04-01), Kwag
patent: 6152631 (2000-11-01), Park
patent: 6292636 (2001-09-01), Kwon
patent: 6659449 (2003-12-01), Kim
patent: 2010/0074637 (2010-03-01), Shiraishi
patent: 2010/0090394 (2010-04-01), You
patent: 2003-226444 (2003-08-01), None
English language abstract of JP 2003-226444, published Aug. 12, 2003.

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