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US 12,498,653 B2Granted
Force adjustment arrangement
AssigneeHewlett-Packard Development Company, L.P.
InventorsTal Shani, Asaf Shoshani, Lavi Cohen, Zeharia Levi
Life of this patent
Estimating the term…
Abstract
Disclosed is a liquid electrophotographic printing apparatus that comprises a developer roller, a cleaning member to contact the developer roller with a contact force and a force adjustment arrangement to adjust the contact force.
Claims15
A liquid electrophotographic printing apparatus comprising:
- a developer roller;
- a cleaning member to contact the developer roller with a contact force, the cleaning member to remove excess printing fluid from the developer roller after the developer roller has applied printing fluid to a photo imaging plate;
- a force adjustment arrangement to, when the contact force varies from a predetermined force, apply a variable force to the cleaning member to adjust the contact force between the cleaning member and the developer roller such that the contact force is substantially equal to the predetermined force;
- and
- a contact force determining device to determine the contact force and output information indicative of the determined contact force.
2 more elements
A binary ink developer for use in a liquid electrophotographic printing apparatus, the binary ink developer comprising:
- a developer roller and a cleaning roller, wherein the cleaning roller is to remove excess printing fluid from the developer roller in use;
- and
- an arrangement to adjustably apply a force to the cleaning roller to adjust a contact force between the cleaning roller and the developer roller, wherein the cleaning roller is located downstream of the developer roller, the downstream location arranged after a point of transfer where the developer roller applies printing fluid to a photo imaging plate, and wherein, when the contact force between the cleaning roller and the developer roller varies from a predetermined force, the arrangement is to apply the force to the cleaning roller to adjust the contact force such that the contact force is substantially equal to the predetermined force,
- wherein the arrangement to adjustably apply the force is to apply a first force to a first end of the cleaning roller and to apply a second force to a second end of the cleaning roller opposite the first end.
1 more element
A method of reducing electrical fatigue in a printing fluid, the method comprising:
- determining a difference between a predetermined force and a contact force with which a cleaning member contacts a developer roller, the cleaning member to remove excess printing fluid from the developer roller after the developer roller has applied printing fluid to a photo imaging plate;
- and
- determining an adjustment factor to be applied to reduce the difference.
Dependencies are inferred from the claim text.