Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1975-01-13
1976-06-22
Blunk, Evon C.
Sheet feeding or delivering
Feeding
Separator and conveyor
221259, 271103, 271106, 271107, 271112, 271116, 271161, 271251, B65H 306, B65H 308, B65H 916
Patent
active
039647404
ABSTRACT:
A sheet-feeding apparatus for separating and feeding sheets of paper, cardboard, metallic and plastic material and the like individually from a stack of such sheets is described. The apparatus as described is provided with a curved sheet-receiving chute for containing and temporarily storing a stack of sheets. A chamber having an apertured movable wall is provided adjacent the stack of sheets. The movable wall is positioned and freely movable to contact the top sheet of the stack. A low-pressure blower is provided for evacuating air from the chamber and drawing the top sheet into sealing contact with the movable wall about the aperture. Sealing of the aperture creates a partial differential pressure which moves the wall, reducing the volume of the chamber and removing the top sheet from the stack. Means, such as a roller, is also provided within the chamber. The roller extends slightly through the aperture to contact the sheet once the sheet is removed from the stack. Thereafter and upon command, the roller is moved for translating the sheet longitudinally and transversely and thus aligning and positioning the sheet for subsequent pickup and removal from the apparatus. When the sheet is removed from the apparatus, the aperture in the movable wall is opened and the wall falls automatically to pick up the next sheet.
REFERENCES:
patent: 2168394 (1939-08-01), Coleman et al.
patent: 3039767 (1962-06-01), Staines
patent: 3391926 (1968-07-01), Jaatinen
patent: 3545741 (1970-12-01), Porth
patent: 3620527 (1971-11-01), Tyler et al.
patent: 3652083 (1972-03-01), Bosshardt
patent: 3764133 (1973-10-01), Gray et al.
Barna, T., "Vacuum Foot Separator", IBM Technical Disclosure Bulletin, vol. 7, No. 2, July 1964, pp. 138, 139.
Blunk Evon C.
Stoner Jr. Bruce H.
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