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. 08, 1991
Filed:
Sep. 08, 1989
Applicant:
Inventors:
Toshiaki Mizuno, Nagoya, JP;
Shinji Kimura, Kani, JP;
Toshiaki Sugiura, Hekinan, JP;
Mikio Sakuma, Ichinomiya, JP;
Tasuku Sugimoto, Seto, JP;
Mamoru Imaizumi, Nagoya, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250561 ; 2502 / ;
Abstract
A sheet detection apparatus is provided which determines the presence or absence of a sheet on a sheet feed path as well as the type of sheet. The apparatus utilizes a light source to direct a predetermined amount of light to a sensor by reflecting off a sheet on the feed path or a reflector in the absence of any such sheet on the path. The presence or absence of the sheet is determined by comparing the output value of the sensor with predetermined reference values.