Asymmetrical paper separator roller for facsimile or copy machin

Details Asymmetrical paper separator roller for facsimile or copy machin Asymmetrical paper separator roller for facsimile or copy machin

1994-10-14

1996-11-05

Milef, Boris

Sheet feeding or delivering

Feeding

Separators

271121, 492 47, B65H 306

Patent

active

055708765

ABSTRACT:
An improved paper separator roller is described where, instead of a symmetrical, cylindrical paper-feed roller, an asymmetrical feed roller (or stripper roller) is used to separate a bottommost sheet from a stack of sheets. Eccentric portions of the feed roller are located at both ends of the roller, and the middle portion of the roller is cylindrical. In one embodiment, the eccentric end portions are formed by cutting ends of a cylindrical roller and then placing a shim between the center shaft and each end portion. Paper-feed springs oppose the eccentric portions of the feed roller, while a centrally located separator pad opposes the cylindrical middle portion of the feed roller. The extended radius at the apogee of the eccentric portions allows the eccentric portions to effectively reach out and grab the bottommost sheet even if the stack of sheets were only initially lightly contacting the roller. The eccentric portions of the feed roller also provide surges in the frictional force urging the bottommost sheets toward the separator pad. This surge in force acts to spread out (or pre-separate) the paper in the stack so the paper can be more easily separated by the separator pad.

REFERENCES:
patent: 4015839 (1977-04-01), McKee
patent: 4030413 (1977-06-01), Young
patent: 4457507 (1984-07-01), Ishikawa et al.
patent: 4473221 (1984-09-01), Arai
patent: 4538800 (1985-09-01), Richter
patent: 4568074 (1986-02-01), Murayoshi
patent: 4674737 (1987-06-01), Murayoshi
patent: 4887806 (1989-12-01), Tanaka et al.
patent: 5372359 (1994-12-01), Miura et al.

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