Electrophotographic photoreceptor

Details Electrophotographic photoreceptor Electrophotographic photoreceptor

2006-07-11

2006-07-11

Chapman, Mark A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

C430S057100, C399S159000

Reexamination Certificate

active

07074531

ABSTRACT:
In an electrophotographic photoreceptor including a conductive substrate and a photoreceptive layer formed on the conductive substrate wherein the photoreceptive layer charged uniformly is exposed to light corresponding to an image information to form an electrostatic latent image, the surface free energy (γ) is determined to be at least 20 mN/m and at most 35 mN/m. The determination of γ on the surface of the photoreceptor1in the appropriate range makes it possible to suppress excessive adhesion of a toner to the surface of the photoreceptor, to suppress adhesion of foreign matters such as a paper powder and to make easy the separation thereof from the surface, which results in improving the cleanability of the photoreceptor. Since the image is formed with the photoreceptor1having always the clean surface, the damage or the decrease in image quality does not occur over a long period of time.

REFERENCES:
patent: 4724194 (1988-02-01), Shirai et al.
patent: 6171742 (2001-01-01), Kawada et al.
patent: 2001/0051308 (2001-12-01), Kawamura et al.
patent: 60-22131 (1985-02-01), None
patent: 11-311875 (1999-11-01), None
Fowkes, “Extension of Fowkes's Formula Evaluation of Surface Tension of Polymeric Solid”, vol. 8, No. 3, 1972, pp. 131-141 and partial English translation thereof.

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