Method and composition for recoating toner cartridge developing member

摘要

Methods of recoating a developing member such as the doctor blade, developing member bar or a developing sleeve, of an electro-photographic image forming apparatus, such as a laser printer toner cartridge, methods of re-using the original components by re-coating them, to cut the cost of using new aftermarket parts and to reduce waste, which methods include close quality control and “tailoring” of formulations to a specific developing system, thus achieving better print quality in terms of density, page yield, and uniformity for the repaired or remanufactured toner cartridge.

主权项

1. A method for recoating a spent laser printer toner cartridge doctor bar comprising:
providing a spent laser printer toner cartridge doctor bar having some original conductive coating, bumps and/or notches on its surface; removing substantially all bumps and notches from the surface; stripping from the surface substantially all of the conductive coating remaining on the surface; sand blasting the surface; removing from the surface sandblasting residue, grease and oils by applying an organic solvent to the surface; spray coating the surface with a coating consisting of a mixture of graphite powder and a clear epoxy powder, the mixture having a ratio of 100 parts by weight of graphite powder to 60 parts by weight of clear epoxy powder, to form a re-coated doctor bar; and, curing the re-coated doctor bar by placing it in an oven kept at a temperature in the range of 375-420° F. and keeping the doctor bar in the oven for about 15-25 minutes.