Process for Providing Improved Electrical Properties on a Roll for Use in Electrophotography
AssigneeLexmark International, Inc.
InventorsDonald Thomas Kral, Scott Alan Searls
Life of this patent
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Abstract
A method and system for producing rolls for electrophotography are provided. The rolls can be rotated and shifted laterally during an oxidative baking process to produce finished rolls having improved electrical and printing characteristics. The oxidation of the rolls may be controlled to provide a corresponding increase in surface electrical resistance to within plus or minus 25 microns of a selected roll thickness.
Claims21
A method of oxidatively baking a roll in a heated fluid flow for use in electrophotography, comprising:
- supporting a roll in a first position on a tray, wherein said roll is formed from a material that is capable of oxidation and an increase in electrical surface resistance;
- altering the angle of the tray with respect to horizontal;
- and
- moving the roll to a second position on the tray in the presence of said heated fluid and oxidizing and increasing the roll's electrical surface resistance.
A method of improving the surface electrical resistance of a roll during an oxidative baking process, the method comprising;
- passing a heated fluid across a roll, wherein said roll is formed from a material that is capable of oxidation and an increase in electrical surface resistance;
- shifting the position of the roll axis;
- rotating the roll about its axis;
- and
- oxidizing and increasing the roll's electrical surface resistance.
A method of oxidatively baking a roll in a heated fluid flow for use in electrophotography comprising:
- supporting a roll in a first position on a tray, wherein said roll is formed from a polydiene polymer that is capable of oxidation and an increase in electrical surface resistance;
- altering the angle of the tray with respect to horizontal;
- and
- moving the roll to a second position on the tray in the presence of said heated fluid and oxidizing and increasing the roll's electrical surface resistance,
- wherein said roll oxidation and increase in electrical surface resistance is configured to occur for a selected thickness, and said oxidation and increase in electrical resistance occurs within plus or minus 25 microns of said selected thickness.
Dependencies are inferred from the claim text.