Paper feeding pressure control apparatus for ink-jet printer

Details Paper feeding pressure control apparatus for ink-jet printer Paper feeding pressure control apparatus for ink-jet printer

1997-02-24

1999-04-06

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

Separators

271160, 271171, B65H 108

Patent

active

058907114

ABSTRACT:
A print media feeding apparatus is disclosed that can convey both thin documents and thick documents. By a simple manual manipulation, additional pressure can be exerted between the knock up plate and the pick up roller when thick documents are positioned therebetween. When thin documents are to be fed, less pressure is exerted by the knockup plate on the pick up roller. When thick sheets of paper are being conveyed, a bell crank is positioned to increase spring pressure on the documents. When thin papers are being conveyed, a bell crank is rotated to another position where the bell crank decreases from the spring pressure exerted on the knock up plate. By adjusting the pressure exerted on the documents, documents having varying thicknesses can be conveyed by the same feeding tray.

REFERENCES:
patent: 4650175 (1987-03-01), Wexler
patent: 4828245 (1989-05-01), Shimogawara
patent: 4838535 (1989-06-01), Yokoi et al.
patent: 5040780 (1991-08-01), Lohrmann et al.
patent: 5335899 (1994-08-01), Golicz
patent: 5348283 (1994-09-01), Yanagi et al.
patent: 5443252 (1995-08-01), Morinaga et al.

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