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. 06, 1993
Filed:
Jun. 22, 1992
Hideki Endo, Osaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
A device for detecting the presence or absence of an original and size thereof and corresponding method therefore. The device is provided on an image forming apparatus, and provides accurate detection of an original and an original's size in the presence of external light. External light is detected during the non-emission state of a light emitting element and used to correct a reference value. The corrected reference value is then compared to a detected value of light emitted from the light emitting element and reflecting from an original, if one is present. Based on the comparison a determination is made as to the presence of an original. When an original is present the light emitting element traverses across the glass contact plate of the image forming apparatus on which the original is placed. Upon the determination of an absence of the original, the light emitting element halts its movement. The distance travelled by the light emitting element is then used to determine the size of the original.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile