Electrophotography – Document handling – Copy
Reexamination Certificate
2005-06-21
2008-11-25
Yan, Ren (Department: 2854)
Electrophotography
Document handling
Copy
C399S388000, C271S009080, C271S126000, C271S156000, C271S160000, C400S624000
Reexamination Certificate
active
07457580
ABSTRACT:
Printing sheets (4) are placed on a sheet placing plate (103). A pickup roller (6) contacts a surface of the uppermost printing sheet (4) placed on the sheet placing plate (103) and feeds the printing sheet (4) out of the sheet placing plate (103). A spring (109) resiliently urges the sheet placing plate (103) toward the pickup roller (6). A ratchet (108) moves in accordance with the movement of the sheet placing plate (103). The printing sheets (4) on the sheet placing plate (103) urges the pickup roller (6) upward so that a pickup frame (115) moves upward to a position detected by a position detecting sensor (65). In accordance with the detection signal from the position detecting sensor (65), a solenoid (71) moves a lock lever (110) so that the lock lever (110) engages the ratchet (108) to thereby restrict the movement of the sheet placing plate (103).
REFERENCES:
patent: 5915690 (1999-06-01), Surya
patent: 5951002 (1999-09-01), Yokota
patent: 6354586 (2002-03-01), Samoto
patent: 6783126 (2004-08-01), Amamoto
patent: 2003/0116906 (2003-06-01), Amamoto
patent: 2003-201045 (2003-07-01), None
Oki Data Corporation
Panitch Schwarze Belisario & Nadel LLP
Pham Andy L
Yan Ren
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