Sheet feeding apparatus with rotary power transmission mechanism

Sheet feeding or delivering – Feeding – Separator and conveyor

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Details

271118, 271122, B65H 500, B65H 306

Patent

active

056241097

ABSTRACT:
A sheet feeding mechanism has a pick up roller which picks up one sheet from a pile on a tray and sends It to contact between a separation roller and a retardation roller. A shaft which positively rotates in a sheet feeding direction is provided with a first gear and the separation roller via an arm pivotable about the shaft and a spring clutch. The arm carries a second gear which receives rotary power from the first gear, a third gear engaged with the second gear and the pick up roller connected with the third gear. The arm is biased upwardly and a negative torque is applied to the second or third gear. Below the separation roller, provided is the retardation roller which is mounted on another shaft via a torque limiter and pressed against the separation roller. The another shaft rotates in a direction opposite the sheet feeding direction. Up and down movement of the pick up roller is mechanically controlled.

REFERENCES:
patent: 4934686 (1990-06-01), Ono et al.
patent: 5085420 (1992-02-01), Sata
patent: 5423526 (1995-06-01), Hasegawa

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