Image forming apparatus

A technology for image and recording paper, which is applied in the direction of electric recording process applying charge pattern, equipment, transportation and packaging of electric recording process applying charge pattern, which can solve the problem of folding angle, can not prevent noise or record paper folding angle, noise recording paper, etc.

Active Publication Date: 2011-09-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, if the recording paper P is conveyed in the reverse direction as described above, the rear end of the lifted recording paper is likely to be caught on the ribs of the forward path 101 or the detour path 102, etc., resulting in noise or folding (folding) of the recording paper.
[0010] Patent Document 1 focuses on the shapes of the ribs that contact the recording paper in the forward path 101 and the detour path 102, but does not mention preventing the rear end of the recording paper from contacting or being caught on the forward path 101 or the detour path 102 during zigzag conveyance. Ribs, etc., can not prevent the above-mentioned noise or the folding of the recording paper accompanying the zig-zag conveyance

Method used

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0032] figure 1 It is a sectional view showing an embodiment of the image forming apparatus of the present invention. The image forming apparatus 1 of the present embodiment prints a monochromatic image represented by image data on recording paper, and its configuration is roughly composed of a printing unit 11 , a recording paper conveying unit 12 and a paper feeding unit 13 .

[0033] In this image forming apparatus 1, image data is received from the outside, various image processing is performed on the image data, and then the image data is input to the printing unit 11, and the printing unit 11 prints an image represented by the image data on recording paper.

[0034] In the approximate center of the printing unit 11, a photoreceptor drum 21 is arranged, and a charging device 22, an optical scanning device 23, a developing device 24, a transfer roller 25...

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Abstract

An image forming apparatus including a pair of rollers that rotate, that selectively carries out forward direction transport and switchback transport, including a guide member provided at a downstream side from the rollers in the forward direction transport that moves to either a first position or a second position, and a control portion causing the guide member to move to the first position during the forward direction transport and causing the guide member to move to the second position during the switchback transport. The first position is a position in which the guide member is retracted from a path of the recording paper on a downstream side from the rollers in the forward direction transport. The second position is a position in which the recording paper sandwiched between the rollers can be received on the guide member.

Description

[0001] Citations relating to application / priority [0002] This application claims priority based on Japanese Patent Application No. 2010-057343 filed in Japan on March 15, 2010. By saying this, the entire content of this is incorporated into this application. technical field [0003] The present invention relates to an image forming apparatus that performs switch back conveyance for switching recording paper conveyance directions. Background technique [0004] In such an image forming apparatus, the conveyance direction of the recording paper is switched in order to selectively perform only surface printing on the recording paper and double-sided printing on the recording paper. When printing only the surface of the recording paper, the recording paper is directly ejected after the printing on the surface of the recording paper is terminated. In addition, when printing on both sides of the recording paper, after the printing on the surface of the recording paper is termin...

Claims

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Application Information

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IPC IPC(8): B65H5/38B65H29/58G03G15/00
CPCB65H85/00B65H2801/06G03G15/6573B65H2404/693G03G15/234G03G2215/0043B65H5/38B65H2301/33312G03G2215/00434
Inventor 成清隆久
Owner SHARP KK
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