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:
May. 19, 1981
Filed:
Aug. 20, 1979
Carl P Anderson, Menlo Park, CA (US);
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A document-feeding apparatus including feed rollers 90, pressure roller 50, a planar tray 16 for receiving a stack of sheet material and having one end portion 94 thereof deformed arcuately away from the main plane of the tray, the arcuate segment 94 being provided with openings 98 through which a sheet separating vacuum may be drawn, and longitudinally extending slots 96 through which the paper-engaging surfaces of the continuously running feed rollers 90 extend, an oscillatory vacuum pumping mechanism 92 for periodically drawing air through the vacuum openings so as to deflect the overlying end portion of the bottom sheet of the stack of material downwardly into engagement with the feed rollers 90 after which the pressure rollers 50 are moved into engagement with the upper surface of the deflected bottom sheet to hold it against the feed rollers 92 as it is driven thereby toward a pair of exit rollers 84 and 86 which thereafter discharge the sheet from the device.