Transfer assist blade
AssigneeXerox Corporation
InventorsEliud Robles Flores, David J. Gervasi, Michael S. Roetker, Santokh S. Badesha, Phillip J. Wantuck
Life of this patent
Estimating the term…
Abstract
There is described a transfer assist blade for an electrostatographic machine. The transfer assist blade includes a wear layer for contacting a copy sheet, an interior layer having a thickness of from about 150 microns to about 500 microns and a back layer comprising a thermoset polyimide having dispersed therein carbon particles such that an out surface of the back layer has a surface resistance of from about 1×108 ohms to about 9.99×108 ohms.
Claims20
An apparatus for transferring a developed image from an image bearing surface to a copy sheet, including, the apparatus comprising:
- a charging station for charging the copy sheet to attract the developed image from the image bearing surface to the copy sheet wherein said charging station includes a corona generating device spaced from the image bearing surface to define a gap therebetween through which the copy sheet passes;
- a transfer assist blade for pressing the copy sheet into contact with the developed image on the image bearing surface in a region proximate to the charging station, wherein the transfer assist blade is shifted between a non-operative position spaced from the image bearing surface, and an operative position in contact with the copy sheet on the image bearing surface, wherein the transfer assist blade comprises in sequence:
- a wear layer for contacting the copy sheet, wherein the wear layer of the transfer assist blade has a surface resistance of greater than about 1010 ohms;
- an interior layer;
- and
- a back layer comprising a thermoset polyimide having dispersed therein carbon particles such that an outer surface of the back layer has a surface resistance of from about 1×108 ohms to about 9.99×108 ohms;
- and
- a lever member for shifting the transfer assist blade between the non-operative position and the operative positions responsive to a registration signal.
(canceled)
(canceled)
A transfer assist blade for an electrostatographic machine, the electrostatographic machine comprising a charging station for charging a copy sheet to attract a developed image from an image bearing surface to a copy sheet wherein said charging station includes a corona generating device spaced from the image bearing surface to define a gap therebetween through which the copy sheet passes;
- the transfer assist blade comprising:
- a wear layer for contacting a copy sheet, wherein the wear layer of the transfer assist blade has a surface resistance of greater than about 1010 ohms;
- an interior layer having a thickness of from about 150 microns to about 500 microns;
- and
- a back layer comprising a thermoset polyimide having dispersed therein carbon particles such that an outer surface of the back layer has a surface resistance of from about 1×108 ohms to about 9.99×108 ohms.
(canceled)
An electrostatographic printing machine of the type in which a developed image is transferred from a photoconductive surface to a copy sheet at a transfer station, comprising:
- an electrostatic charging unit for charging the copy sheet to attract the developed image from the photoconductive surface toward the copy sheet wherein said electrostatic charging unit includes a corona generating device spaced from the photoconductive surface to define a gap therebetween through which the copy sheet passes;
- a transfer assist blade for pressing the copy sheet into contact with at least the developed image on the photoconductive surface wherein the transfer assist blade includes a wear layer for contacting the copy sheet, wherein the wear layer of the transfer assist blade has a surface resistance of greater than about 1010 ohms, an interior layer having a thickness of from about 150 microns to about 500 microns;
- and a back layer comprising a thermoset polyimide having dispersed therein carbon particles such that an out surface of the back layer has a surface resistance of from about 1×108 ohms to about 9.99×108 ohms;
- the transfer assist blade adapted to be shifted between a non-operative position spaced from the photoconductive surface, and an operative position in contact with the copy sheet on the photoconductive surface;
- and
- a lever member for shifting the transfer assist blade between the non-operative position and the operative positions, the lever member responsive to a registration signal.
(canceled)
Dependencies are inferred from the claim text.