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. 30, 1991
Filed:
May. 11, 1990
Hirohisa Miyamoto, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A document size detection device comprising an illuminating unit for irradiating a first light on a document on a platen; a projecting unit for projecting the first light reflected on the document onto a photosensitive member; a document cover for covering the document on the platen, the cover having a reflecting area for reflecting the first light from the illuminating unit and a non-reflecting area for transmitting the above light; a document detection sensor provided at a position corresponding to the non-reflecting area and comprising a light emitting element and a light receiving element; and a filter for transmitting a second light from the light emitting element as well as guiding the first light from the illuminating unit to the projecting unit, the filter unit being opposed to a detecting surface of the sensor.