Sheet feeding or delivering – Feeding
Patent
1979-04-11
1981-03-03
Schacher, Richard A.
Sheet feeding or delivering
Feeding
271 22, 271 9, 271162, 271160, B65H 330
Patent
active
042536529
ABSTRACT:
An apparatus for supplying sheets of paper to the printing platen of an office machine, for example a typewriter or bookkeeping machine. The paper is held in a stack within a removable cassette which can be placed in substantially vertical position into a cassette holder. The cassette is locked in the cassette holder by a slight rearward rotation which causes the engagement of a locking bar with suitable recesses in the cassette. When rotated into the operative position, a spring-loaded pressure plate urges the paper stack against a rotating separating roller which transports the top sheet from the stack in the direction of the printing platen of the office machine. The cassette also includes top sheet separating tabs which hold the corners of the top sheet for a limited time after the separating roller has begun the transport of the sheet, whereafter the top sheet snaps out of position. In order to prevent the weight of the paper stack from interfering with the free movement of the top sheet separating tabs, the lower interior wall of the cassette is raised to form a paper support surface which is advantageously coated with a friction-reducing layer. The mechanism may include provision for holding a second cassette and paper guides for selective admission of sheets from either cassette to the office machine.
REFERENCES:
patent: 1209110 (1916-12-01), Bradshaw
patent: 1960482 (1934-05-01), Duncan
patent: 3285601 (1966-11-01), Zeuthen
patent: 3517921 (1970-06-01), Miciukiewicz
patent: 4108427 (1978-08-01), Komori
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