Imaging method and device

An image and image-carrying technology, applied in the direction of electric recording process applying charge pattern, equipment for electric recording process applying charge pattern, electric recording technique, etc., can solve the problems such as lowering of fixing temperature, paper jam, and no consideration of the device, etc. Achieve the effect of preventing image shift, improving transportability, and good transferability
CN1351285AInactive Publication Date: 2002-05-29RICOH KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
RICOH KK
Publication Date
2002-05-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

An image forming apparatus that is capable of forming an appropriate image even on a special transfer sheet, such as a thick and rigid transfer sheet (e.g., a cardboard and an envelope) and a long transfer sheet, etc. In the image forming apparatus, when the thick and rigid transfer sheet is used, a transfer bias applied to first and second transfer devices is increased by about 10 to 30% compared to that applied when a normal transfer sheet is used, and a temperature of fixing rollers is increased by about 10 to 30% compared to that when the normal transfer sheet is used. When the long transfer sheet that is longer than a circumferential length of a second image bearing member is used, an image transfer onto the second image bearing member is prohibited. In addition, the temperature of the fixing rollers is increased by about 10 to 30% compared to that when the normal transfer sheet is used.
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Description

technical field

[0001] The present invention relates to a method and apparatus for forming images on both sides of a recording medium. Background technique

[0002] Some image forming apparatuses such as copiers, printers, and facsimiles can form images on both sides of a recording medium (hereinafter simply referred to as “paper” for simplicity). In the conventional image forming apparatus capable of double-sided recording, the following method is generally used: the image (developed image) formed on one side of the image carrier is transferred to paper, fixed, and then the paper is turned over by a reversing passage or the like. , the paper is fed again, and the image on the other side (developed image) is transferred to the back of the paper for fixing.

[0003] In the case of recording on both sides as described above, there are many problems in ensuring the reliability of paper transportation due to the switching of the paper transportation direc...

Claims

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