Apparatus and method for forming an image utilizing a bias volta

Details Apparatus and method for forming an image utilizing a bias volta Apparatus and method for forming an image utilizing a bias volta

1994-10-24

1997-04-22

Lee, Shuk Yin

Electrophotography

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399314, 399 66, G03G 2100, G03G 1514

Patent

active

056233329

ABSTRACT:
A transport device for alternatively transporting a first sheet-like material which is a first size and a second sheet-like material which is second size different than the first size, to pass a charging portion which applies an electric charge of a predetermined polarity, includes a base member made from an insulating material, a first conductive guide member arranged on the base member along a transport direction of the sheet-like material, and a second conductive guide member arranged on the base member along the transport direction and apart from the first conductive guide. The first conductive guide member guides both the first sheet-like material and the second sheet-like material, and the second conductive guide member guides the second sheet-like material. Also, the transport device includes a voltage source coupled to the first conductive guide member and the second conductive guide member, a first switch arranged between the voltage source and the first conductive guide member, and a second switch arranged between the voltage source and the second conductive guide member. A polarity of voltage applied by the voltage source is approximately the same as the predetermined polarity. Furthermore, the transport device includes a control device for turning on the first switch when the first sheet-like material is guided, and for turning on the first switches and the second switch when the second sheet-like material is guided.

REFERENCES:
patent: 4471234 (1984-09-01), Horiuchi
patent: 5110106 (1992-05-01), Matsumura et al.
patent: 5337128 (1994-08-01), Hashizume et al.

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