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:
Jun. 16, 1992
Filed:
Oct. 11, 1991
Takako Sato, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A copier having a platen for laying a document thereon and a platen cover having the inner surface thereof implemented as a mirror surface or similar reflective surface for covering the platen and document, and capable of detecting the size of the document by illuminating the reflective surface of the platen cover and the document, reading the resulting reflections from the platen cover and document, and discriminating the platen cover and document on the basis of data representative of the reflections. Since the density of the reflective surface of the platen cover associated with the area outside of an effective image area changes with the angle of the platen cover, i.e., the thickness of the document, an optimal parameter matching the inclination angle of the platen cover is selected to compensate for the change in density. Even the size of a relatively thick document is surely detected with no regard to the position of the platen cover.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile