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:
Aug. 17, 2021
Filed:
Oct. 01, 2019
Tadaaki Oyama, Kanagawa, JP;
Masamoto Nakazawa, Kanagawa, JP;
Hiroki Shirado, Kanagawa, JP;
Tomohiro Sasa, Tokyo, JP;
Tatsuya Ozaki, Kanagawa, JP;
Kohsuke Nambara, Kanagawa, JP;
Tadaaki Oyama, Kanagawa, JP;
Masamoto Nakazawa, Kanagawa, JP;
Hiroki Shirado, Kanagawa, JP;
Tomohiro Sasa, Tokyo, JP;
Tatsuya Ozaki, Kanagawa, JP;
Kohsuke Nambara, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A document size detection device includes: a light source that irradiates a document placed on placing means with scanning light via the placing means; a reading unit that receives reflection light from the document via the placing means to acquire image data of the document; and circuitry to set an illumination depth of the scanning light at a size detection time when the size is detected, shallower than an illumination depth of the scanning light at an image reading time when an image of the document is read, and detects, at the size detection time, the size based on a difference between first image data acquired in a state in which the scanning light is switched off and second image data acquired in a state in which the scanning light is switched on.