Invention Grant
- Patent Title: Automatic document feeder and image forming apparatus including the same
- Patent Title (中): 自动进纸器和包括其的成像设备
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Application No.: US13896371Application Date: 2013-05-17
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Publication No.: US09075376B2Publication Date: 2015-07-07
- Inventor: Hiroaki Utagawa , Hiroshi Kubo , Shinya Kitaoka , Takehisa Shimazu , Takeshi Akai , Fumiyuki Heishi , Norio Kimura , Yoshito Suzuki , Jun Yamada
- Applicant: Hiroaki Utagawa , Hiroshi Kubo , Shinya Kitaoka , Takehisa Shimazu , Takeshi Akai , Fumiyuki Heishi , Norio Kimura , Yoshito Suzuki , Jun Yamada
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2012-121163 20120528
- Main IPC: G03G15/00
- IPC: G03G15/00

Abstract:
According to an embodiment, an ADF includes: a sheet-feed cover unit; a switch unit to be switched on or off depending on whether the sheet-feed cover unit is open or closed and including a first terminal, to which a first voltage, by which a driving motor is driven, is input, and a second terminal connected to the driving motor; and an open/close-detection circuit unit that includes a first switch circuit and a second switch circuit. The first switch circuit is switched on or off based on a threshold voltage that is larger than a second voltage to be generated in the driving motor by a jammed-document removing motion and smaller than the first voltage. The open/close-detection circuit unit detects that the sheet-feed cover unit is closed when the second switch circuit is energized, but detects that the sheet-feed cover unit is open when the second switch circuit is de-energized.
Public/Granted literature
- US20130315610A1 AUTOMATIC DOCUMENT FEEDER AND IMAGE FORMING APPARATUS INCLUDING THE SAME Public/Granted day:2013-11-28
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