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:
Dec. 29, 1981
Filed:
Mar. 03, 1980
Tateomi Kono, Toyokawa, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A paper feed mechanism employing interchangeable cassettes having liftable paper stack support plates and containing different size paper sheets includes a feed roll engaging the uppermost sheet of an operatively positioned cassette, a lifting member separably engaging the support plate and a spring system biasing the lifting member and adjustable under the control of an indexing member on the operative cassette to adjust the bias in accordance with the paper size so that the pressure of the feed roll in the uppermost sheet is constant and independent of paper size. The spring system may include a first spring which is operable with all sizes of paper sheet and a second spring which is enabled only when the cassette contains large sheets and biases the lifting member with the first spring.