Image-forming device and method of manufacturing dielectric shee

Details Image-forming device and method of manufacturing dielectric shee Image-forming device and method of manufacturing dielectric shee

1998-01-20

1999-03-02

Pendegrass, Joan

Electrophotography

Image formation

Transfer

399308, 264 454, G03G 1516

Patent

active

058783148

ABSTRACT:
An image-forming device according to the present invention is provided with an image-carrying body, a transfer medium, which transfers the toner image formed on the image-carrying body to a transfer material, and an affixing body provided at the perimeter of the transfer medium, which electrically affixes and holds the transfer material to the transfer medium. The transfer medium is made up of at least a semiconducting layer and a conductive substrate supporting it. The semiconducting layer has a foam portion with foam particles which increase in diameter toward the conductive substrate. This foam portion is made of a dielectric sheet, which is manufactured by forming a foaming dielectric polymer into a sheet, and heating the two surfaces thereof at different temperatures. The foregoing structure can provide a desired elasticity with the portion with foam particles of large diameter, and a desired surface smoothness with the portion with foam particles of small diameter. Accordingly, the surface potential of the transfer drum can be maintained uniformly and stably, thus eliminating poor affixing of the transfer material to the transfer drum and poor transfer of the toner image to the transfer material.

REFERENCES:
patent: 3476841 (1969-11-01), Bienert
patent: 5143664 (1992-09-01), Noguchi et al.
patent: 5390012 (1995-02-01), Miyashiro et al.
patent: 5391337 (1995-02-01), Kearney et al.

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