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Image forming apparatus

An image and medium technology, applied in the field of image forming devices, can solve problems such as damage to image quality and damage

Active Publication Date: 2021-03-05
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the fixing surface side member is in contact with the continuous medium, especially when the fixing surface side member is rotated for uniform heat, damage occurs in the fixing surface side member and the image quality is impaired.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0047] figure 1 It is a diagram showing an example of the overall configuration of the image forming apparatus 100 according to the first embodiment. figure 2 It is a diagram showing main parts of the control system of the image forming apparatus 100 . The image forming apparatus 100 is, for example, an apparatus that forms an image on a continuous medium M such as roll paper or a continuous slip.

[0048] Such as figure 1 As shown, the image forming apparatus 100 is connected to a paper feeding device (paper feeding unit) 1, a main body unit 2, and a winding device (winding unit) 3 from the upstream side along the conveying direction of the continuous medium M (the paper conveying direction). constituted. In addition, in figure 1 In the figure, the case where the paper feeding device 1 and the winding device 3 are configured separately from the main body 2 is shown, but they may also be configured integrally.

[0049] The paper feeding device 1 is a device that feeds th...

no. 2 Embodiment approach

[0099] Next, a second embodiment of the present invention will be described.

[0100] In the first embodiment, the case where the tension applying mechanisms 101 and 301 are provided in the paper feeding device 1 and the winding device 3 has been described as an example. In the image forming apparatus 200 of the second embodiment, as Figure 7 As shown, the tension applying mechanism 401 is provided between the pinch roller 53 on the upstream side and the pinch roller 54 on the downstream side of the fixing unit 60 . The structure of the tension applying mechanism 401 is the same as that of the tension applying mechanisms 101 and 301 described above.

[0101] exist Figure 7 In the drawing, the case where the tension imparting mechanism 401 is provided on the upstream side of the fixing unit 60 between the nip rollers 53 and 54 is shown, but it may be provided on the downstream side. In addition, a tension applying mechanism may also be provided in the paper feeding device 1...

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PUM

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Abstract

In the image forming apparatus, the waiting time of the heating operation of the fixing part after the continuous medium is cut off and the printed matter is taken out after printing and the waiting time of the heating operation of the fixing part after the roller of the continuous medium on the paper supply side is replaced can be shortened. In an image forming apparatus (100), a sheet passing path is set to separate a fixing belt (64) from a continuous medium (M) when tension is applied to the continuous medium (M) in a state where the fixing belt (64) and a lower pressure roller (65) are separated, and a control unit (10) sets both nip rollers (53, 54) to a crimped state in a state where tension is applied to the continuous medium (M) during a temperature rise operation and a temperature rise maintenance operation. As a result, the tension applied to the continuous medium (M) between the nip rollers (53, 54) is maintained.

Description

technical field [0001] The present invention relates to an image forming apparatus. Background technique [0002] In an electrophotographic image forming apparatus that forms images on a continuous medium such as roll paper or continuous slips, the continuous medium exists on the transport path in a stopped state during non-image formation such as a standby state. In particular, discoloration (burning) and deformation may occur when the continuous medium is held by the fixing nip in a stopped state during the heating operation of the fixing unit before image formation starts or after image formation is completed. Therefore, the fixing surface side member and the back side member of the fixing unit are separated, but when the separation distance between the fixing surface side member and the back side member is small, the continuous medium is deformed by heat from the fixing surface side member. As a result, the fixing surface side member comes into contact with the continuo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2028G03G15/657G03G15/2032G03G15/205G03G15/55G03G15/6517G03G15/2039
Inventor 麻生浩史
Owner KONICA MINOLTA INC