G - Physics – 03 – G
Patent
G - Physics
03
G
117/184, 32/12.0
G03G 5/07 (2006.01) G03G 5/02 (2006.01) G03G 5/087 (2006.01) G03G 15/06 (2006.01) G03G 15/34 (2006.01)
Patent
CA 1286491
ABSTRACT This invention relates to a recording member useful in certain types of electrographic recording processes. Kotz, U.S. Patent 3,816,840 discloses an electrographic recording process and apparatus in which a dielectric recording member is arranged between two electrodes. Magnetically adhered to one of the electrodes is electronically conductive toner powder. The toner powder provides an electrically conductive path between the electrode to which it is bound and the adjacent surface of the dielectric member. A voltage is applied to the electrodes for a time and of a magnitude sufficient to generate a force pattern on the toner which enables toner deposition on the recording member in accordance with the force pattern. The force pattern is generated directly on the toner rather than on the recording member, which is passive in the operation of the apparatus disclosed in the patent. For certain purposes in the practice of the recording process disclosed in U.S. Patent No. 3,816,840, it is desirable that charge leakage from the recording member be such that a controlled amount of charge is dissipated from the toner deposited thereon, for example, from electrically charged toner applied uniformly to the recording member from an applicator member. One benefit of such controlled charge leakage is that the recording member can be re-imaged with no observation of a residue of a previous image pattern that will interfere with the new image on the recording member. The dielectric coating exhibits charge dissipation properties that will allow removal and replacement of toner powder within one operating cycle of the aforementioned recording process, and the surface of the coating is sufficiently durable to allow the recording member to be used repeatedly, e.g., at least about 100,000 cycles, before the conductive substrate needs to be recoated.
510967
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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