Sheet feeder

Details Sheet feeder Sheet feeder

1995-06-28

1997-02-04

Bollinger, David H.

Sheet feeding or delivering

Feeding

By means to convey sheet

271109, 271264, 271273, 271314, 198782, B65G 1312

Patent

active

055990150

ABSTRACT:
A sheet feeder including at least a pair of variable outer diameter rollers and having a compact, simple and long life construction. The variable outer diameter roller includes a generally cylindrical pipe having four equally spaced penetrating holes radially disposed in its cylindrical wall, a sealing means having a diaphragm positioned adjacent each of the penetrating holes and fitted to the pipe support, and sliders forming a roller peripheral face fitted into each penetrating hole to be able to slide smoothly. Each slider is moved by diaphragms in a direction so the roller outer diameter expands by compressed air supplied through a fluid supply passage in a rotary axle which supports the roller. Exhausting the compressed air causes the roller outer diameter to decrease and restores the roller to its original size.

REFERENCES:
patent: 2303385 (1942-12-01), Peters
patent: 4496144 (1985-01-01), Perun et al.
patent: 5407054 (1995-04-01), Matsuda et al.
patent: 5480022 (1996-01-01), Matsuda et al.

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