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:
Dec. 01, 2020
Filed:
Sep. 19, 2019
Tomohiro Sasa, Tokyo, JP;
Hiroki Shirado, Kanagawa, JP;
Tadaaki Oyama, Kanagawa, JP;
Tatsuya Ozaki, Kanagawa, JP;
Kohsuke Nambara, Kanagawa, JP;
Tomohiro Sasa, Tokyo, JP;
Hiroki Shirado, Kanagawa, JP;
Tadaaki Oyama, Kanagawa, JP;
Tatsuya Ozaki, Kanagawa, JP;
Kohsuke Nambara, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.