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:
Jan. 26, 1999
Filed:
Jul. 03, 1996
Toshiaki Kumashiro, Ebina, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A reading device, having both modes of a book scanner and a sheet scanner, to be used in a handling apparatus having a function for selecting a reference white plate. The reading device includes a reading unit, a first reference white plate, which is mounted within an area where an original document is transferred and where therefore dust may be carried and raised thereabouts. The first reference white plate is usually read by the reading unit in the sheet scanner mode. A second reference white plate is mounted out of an area of a transference of an original document, and therefore no dust is carried or raised thereabouts. The reading device further includes a controller which controls the reading unit to suitably select reading a white density from between the first reference white plate and the second reference white plate in accordance with a shading correction situation so as to improve an image output quality.