Apparatus for conveying sheet member

Details Apparatus for conveying sheet member Apparatus for conveying sheet member

1987-04-14

1989-06-20

Schacher, Richard A.

Sheet feeding or delivering

Feeding

By means to convey sheet

271 94, 271196, B65H 522

Patent

active

048403695

ABSTRACT:
An apparatus for conveying a sheet member by a conveyor roller having an axis perpendicular to the direction of convey of the sheet member, suitable for use in effecting a sub-scan by an electron beam over the surface of the sheet member. The apparatus has at least one suction roller constituting the conveyor roller and having a hollow cylindrical body and a multiplicity of suction holes formed in the wall of the cylindrical body; and an arrangement for allowing only selected suction holes to be exposed for the suction of the sheet material. The arrangement may include a chamber rotatably receiving the suction roller and communicating with a vacuum source, the chamber having a wall provided therein with at least one elongated slit through which the suction holes in a region parallel to the axis of the suction roller are exposed.

REFERENCES:
patent: 3258530 (1966-06-01), Fowlie
patent: 3669446 (1972-06-01), Derc
patent: 3851871 (1974-12-01), Aronson
patent: 3942788 (1976-03-01), Boyle

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