Feed roller, feed roller assembly, and sheet handling system
AssigneeBdt AG
InventorsNikolaus Bernhard Bergander, Andreas Wardak, Peter Xaver Kearney
Life of this patent
Estimating the term…
Abstract
A feed roller is provided for use in a feed roller assembly for intermittently feeding sheets. The feed roller has a body having a cross-section including an arc portion forming a partially cylindrical configuration. A support member is coupled to the body on at least one side of the body. A distance roller is rotatably supported by the support member relative to the body. The distance roller is spaced apart opposite the arc section parallel to the body.
Claims20
A feed roller (21, 41A, 41B) for use in a feed roller assembly (20) for intermittently feeding sheets (15), comprising:
- a body having a cross-section comprising an arc portion (40) and a chord portion (42) to substantially form a semicylindrical configuration;
- a support member (29) connected to the body on at least one side of the body;
- and
- a distance roller (27, 37A, 37B) provided freely rotatable at said support member, wherein:
- the distance roller (27, 37A, 37B) is spaced apart in a distance opposite to said chord portion to rotate with the body about an axis of the body and extends along a longitudinal span overlapping and essentially the same as a longitudinal span of the body.
A sheet feeding system comprising:
- a feed roller assembly held for rotation about a first axis and comprising:
- a feed roller having a circular cylindrical surface of a first radius along a first sector;
- a distance roller having a second axis;
- and
- a support member supporting the distance roller relative to the feed roller for rotation about the second axis, the second axis parallel to and spaced apart from the first axis outside of the sector so as to rotate with the feed roller about the first axis and the distance roller having a longitudinal span overlapping and essentially the same as a longitudinal span of the feed roller.
A method for feeding paper from a stack, comprising:
- rotating a feed roller about a first axis;
- in an initial stage, positioning a lever-mounted pad relative to the first axis via an idler roller;
- depressing the pad via a central distance roller, the distance roller supported for rotation about a second axis spaced apart from the first axis, the second axis rotating about said first axis with said feed roller;
- and
- guiding a top sheet of said paper with the feed roller to pass over the pad, there being a partial recovery of the pad between the depressing and an initial engagement to the pad of the feed roller and top sheet.
Dependencies are inferred from the claim text.