Electrophotographic recorded device having excellent separating capabilities and method of transferring the recorded medium
AssigneeFujitsu Limited
InventorTsuneo Mizuno
Life of this patent
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Abstract
The electrophotographic recording device and method of transferring the recorded medium provide excellent separating capabilities. The electrophotographic recording device has a separator section located along a feed path of printing paper at a front stage of the transfer roller. At the separator section, the printing paper is dielectrically polarized to make its surface facing a photosensitive drum charged in the same polarity as that of the photosensitive drum before the printing paper is brought into contact with the photosensitive drum. The paper is separated from the photosensitive drum after the transfer process due to the electrostatic repulsion on a contact surface between the photosensitive drum and the paper.
Claims12
An electrophotographic recorded device comprising:
- a photosensitive drum that forms a toner image;
- a transfer roller that applies to a recorded medium a transfer voltage so as to transfer the toner image onto a recordable area on a surface of the recorded medium, the recorded medium passing through between said photosensitive drum and said transfer roller;
- and
- a grounded separator section that contacts the recorded medium, and polarizes and charges an edge in an area out of the recordable area on the surface of the recorded medium into the same polarity as that of said photosensitive drum.
A method of transferring a recorded medium, comprising the steps of:
- polarizing and charging an edge in an area out of a recordable area on a surface of a recorded medium facing a photosensitive drum into the same polarity as that of said photosensitive drum by contacting the recorded medium before the recorded medium is conveyed between said photosensitive drum and a transfer roller;
- and
- applying a transfer current to said transfer roller so as to transfer a toner image formed on said photosensitive drum onto the recordable area on the surface of said recorded medium.
Dependencies are inferred from the claim text.