Apparatus for automatically feeding sheets

Details Apparatus for automatically feeding sheets Apparatus for automatically feeding sheets

1982-03-17

1984-07-10

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Feeding

Separators

271121, 271160, 271165, B65H 122, B65H 352

Patent

active

044588909

ABSTRACT:
A stack of sheets such as documents to be fed one by one from the lowermost sheet is clamped between a lower feeding roller rotated in a given direction and an upper pressing roller whose shaft is loosely inserted in an elongated hole formed in a bearing secured to a rotatable arm. A coiled spring is connected between a free end of the arm and a fixed body of the apparatus to rotate the arm in such a manner that the pressing roller is urged against the stack of sheets with a large force due to the strong restoring force of the spring and the gravitational force of the pressing roller. A stopper plate is arranged in a rotational movement path of the arm at such a position that when a thickness of the stacked sheets has decreased to a given value, the rotation of the arm is inhibited by an engagement of the arm and stopper plate. After that engagement, only the pressing roller moves downward along the elongated hole and the pressing roller is urged against the stack of sheets with a small force due only to the gravitational force of the pressing roller.

REFERENCES:
patent: 3838851 (1974-10-01), Kolibas
patent: 3869116 (1975-03-01), Kroeker
patent: 4232860 (1980-11-01), Brown

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