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:
Aug. 17, 1993
Filed:
Jan. 02, 1991
Applicant:
Inventor:
Hayato Shinohara, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; B41J / ;
U.S. Cl.
CPC ...
395111 ; 395101 ; 400 83 ; 4007081 ;
Abstract
A photocoupler consisting of a light emitting unit and a photo sensing unit is arranged at a predetermined position of a recording medium feeding path to thereby detect the presence or absence of the recording medium. The light emitting unit is driven by a drive signal having a predetermined signal format. A photo signal of the light emitting unit corresponding to the drive signal is detected by the photo sensing unit, thereby detecting the presence or absence of the recording medium. The recording medium is fed to a predetermined recording position on the basis of the detection of the recording medium.