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. 18, 1990
Filed:
Sep. 05, 1989
Kenneth A McAuley, Framingham, MA (US);
Frank S Silveira, Norwood, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A pick mechanism for sheet feeding apparatus of a type in which the top sheet of a stack of media is separated from the remainder of the stack by pick movement to engage and lift the rear end of the top sheet from the remainder of the stack for subsequent separation and feeding from the stack, and including means for lifting the pick independently of elevating movement caused by engagement of the pick with a sheet. The pick lifting arrangement operates to lift the pick in the event of a failure thereof to engage the rear edge of a sheet and also to gently lower the pick back onto the next successive top sheet in the stack to be fed. A detector system is provided by which the conditions of sheet feed due to pick movement are detected and used to control driving components associated with the apparatus.