The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2015
Filed:
May. 17, 2013
Hiroaki Utagawa, Kanagawa, JP;
Hiroshi Kubo, Kanagawa, JP;
Shinya Kitaoka, Kanagawa, JP;
Takehisa Shimazu, Kanagawa, JP;
Takeshi Akai, Kanagawa, JP;
Fumiyuki Heishi, Kanagawa, JP;
Norio Kimura, Kanagawa, JP;
Yoshito Suzuki, Kanagawa, JP;
Jun Yamada, Kanagawa, JP;
Hiroaki Utagawa, Kanagawa, JP;
Hiroshi Kubo, Kanagawa, JP;
Shinya Kitaoka, Kanagawa, JP;
Takehisa Shimazu, Kanagawa, JP;
Takeshi Akai, Kanagawa, JP;
Fumiyuki Heishi, Kanagawa, JP;
Norio Kimura, Kanagawa, JP;
Yoshito Suzuki, Kanagawa, JP;
Jun Yamada, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
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.