Roller for paper stack separation
AssigneeHewlett-Packard Development Company, L.P.
InventorsFred O. Stephens, Chalam Kashyap
Life of this patent
Estimating the term…
Abstract
A roller includes an outer cylindrical portion and an inner cylindrical portion arranged concentrically with the outer cylindrical portion. A plurality of connection spokes are provided for connecting the outer cylindrical portion and the inner cylindrical portion to each other, wherein each of the connection spokes are connected along a non-linear connection path with respect to an axis extending between the outer cylindrical portion and the inner cylindrical portion of the roller to provide a tunable spring constant in the roller.
Claims19
A roller comprising:
- an outer cylindrical portion;
- an inner cylindrical portion arranged concentrically with the outer cylindrical portion;
- and
- a plurality of connection spokes for connecting the outer cylindrical portion and the inner cylindrical portion to each other, wherein each of the connection spokes are connected along a non-linear connection path with respect to an axis extending between the outer cylindrical portion and the inner cylindrical portion of the roller to provide a tunable spring constant in the roller.
A roller, comprising:
- an outer cylindrical portion;
- an inner cylindrical portion arranged concentrically with the outer cylindrical portion;
- and
- a plurality of connection spokes for connecting the outer cylindrical portion and the inner cylindrical portion to each other, wherein the outer cylindrical portion, the inner cylindrical portion, and the connection spokes form a compression area in the roller, wherein a compression-stop is formed inside the compression area to limit compression on the outer cylindrical portion in the roller.
A printer comprising:
- a retard roller comprising:
- an outer cylindrical portion;
- an inner cylindrical portion arranged concentrically with the outer cylindrical portion;
- and
- a plurality of connection spokes for connecting the outer cylindrical portion and the inner cylindrical portion to each other, wherein each of the connection spokes are connected along a non-linear connection path with respect to an axis extending between the outer cylindrical portion and the inner cylindrical portion of the roller to provide a tunable spring constant in the roller, wherein the outer cylindrical portion, the inner cylindrical portion, and the connection spokes form a compression area in the roller, wherein a compression-stop is formed inside the compression area to limit compression on the outer cylindrical portion in the roller;
- a separation roller to drive the retard roller and guide media through the printer by compressing the retard roller against the media;
- a print head to dispense ink on the media while guided though the separation roller and the retard roller;
- and
- a controller to control the separation roller and the print head to cause a printing on the media.
Dependencies are inferred from the claim text.