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US 7,455,286 B2Granted
Sheet separation using two torque motors
AssigneeHewlett-Packard Development Company, L.P.
InventorsDavid K. Klaffenbach, Gary L. Miller, Jeffrey S. Mathena, Christopher M. Lesniak
Life of this patent
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Abstract
Various embodiments of a sheet separation system are disclosed.
Claims30
A sheet separation system comprising:
- a first sheet engaging surface;
- a second sheet engaging surface, wherein the first surface and the second surface are configured to engage media therebetween;
- a first motor to apply a first torque to the first sheet engaging surface in a first direction;
- a second motor to apply a second torque to the second sheet engaging surface in a second direction opposite to the first direction, wherein the second torque is intermittently applied to the second sheet engaging surface during picking of a sheet;
- and
- a controller that generates control signals, wherein the second motor varies a percentage of time that the second torque is applied to the second sheet engaging surface as a sheet travels between the first sheet enraging surface and the second sheet engaging surface in response to the control signals.
3 more elements
A sheet separation method comprising:
- positioning at least one sheet between a first media engaging surface and a second media engaging surface;
- applying a first torque in a first direction to the first surface with a first motor;
- and
- applying a second torque in a second opposite direction to the second surface with a second motor;
- adjusting operation of the second motor, wherein the adjusting includes varying a percentage of time at which the second torque is applied as a sheet travels between the first sheet engaging surface and the second sheet engaging surface,
- wherein the second torque is intermittently applied to the second sheet engaging surface during picking of a sheet.
3 more elements
Dependencies are inferred from the claim text.