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image forming device

An image and image correction technology, applied in the electrical recording process using charge graphics, the equipment, transportation and packaging of the electrical recording process using charge graphics, can solve the problem of wasting paper, and it is difficult to correctly adjust the surface image and the back image Position and size and other issues, to achieve simple and accurate adjustment effect

Active Publication Date: 2022-02-01
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the image forming apparatus described above, the operator needs to perform an operation of causing the scanner to read the dedicated chart.
In addition, paper is wasted because special charts need to be output before actual printing
In addition, since the external factors (such as temperature, humidity, etc.) are different between the output of the dedicated chart and the actual printing, it is difficult to correctly adjust the position and size of the surface image and the back image

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0022] figure 1 Shown is a schematic diagram of the overall configuration of the image forming apparatus 100 according to the first embodiment. Such as figure 1 As shown, the image forming apparatus 100 mainly includes a paper feed tray 101 , a paper discharge tray 102 , a transport unit 110 , an image forming unit 120 and a reading unit 130 . In the paper feed tray 101 , a plurality of sheets of paper M before image formation are stored in a stacked state. Paper M on which an image is formed is stored in the paper discharge tray 102 .

[0023] The paper M is an example of a recording medium conveyed by the conveyance unit 110 , an image is formed by the image forming unit 120 , and an outer shape is read by the reading unit 130 . The paper M is, for example, cut paper cut in advance into a predetermined size (for example, A4, B5, etc.). In addition, the paper M is paper or cloth in which fibers stretched by image formation are woven.

[0024] In addition, inside the imag...

no. 2 approach

[0077] In addition, in the first embodiment, an example in which only the surface image A is corrected based on the first half magnification is described, but the processing in step S707 is not limited to the example in the first embodiment. refer to Figure 11 The processing of step S707 according to the second embodiment will be described. Figure 11 Shown is a diagram showing the relationship between the paper M, the front image A, and the back image B when only the back image B is corrected. In addition, since the configuration of the image forming apparatus 100 and the processing other than step S707 are the same as those of the first embodiment, further description thereof will be omitted.

[0078] Such as Figure 11 As shown, the image correction unit 82 according to the second embodiment does not correct the specified surface image A 1 . In addition, the image correcting unit 82 according to the second embodiment applies the first half magnification (=90%) calculat...

no. 3 approach

[0087] refer to Figure 12 , and the processing of steps S705 and S707 according to the third embodiment will be described. Figure 12Shown is a diagram showing the relationship between the paper M, the front image A, and the back image B when the front image A and the back image B are corrected. In addition, since the configuration of image forming apparatus 100 and the processing other than steps S705 and S707 are the same as those of the first embodiment, further description thereof will be omitted.

[0088] In the third embodiment, if Figure 12 As shown, an example in which only the right side is reduced by 10% by fixing the image on the surface of the paper M, and only the right side is further reduced by 10% by fixing the image on the back side of the paper M will be described.

[0089] In step S705, the deformation calculation unit 81 according to the third embodiment calculates, for each side of the paper M, the overall magnification which is the magnification of th...

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PUM

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Abstract

The present invention provides an image forming apparatus capable of simple and accurate adjustment of images formed on both sides of a recording medium. It includes: a transport unit that transports a plurality of recording media in sequence; an image forming unit that forms images on the front and back sides of the recording medium transported by the transport unit; and a reading unit that reads images formed by the image forming unit. The shape of the recording medium of the image; the deformation amount calculation part, which calculates the deformation amount of the recording medium based on the shape of the preceding recording medium among the plurality of recording media, and the image correction part, which calculates the deformation amount calculated by the deformation amount calculation part At least one of the surface image formed on the surface of the subsequent recording medium that is conveyed after the preceding recording medium and the back image formed on the rear surface is corrected.

Description

technical field [0001] The present invention relates to an image forming apparatus that forms images on the front and back of a recording medium. Background technique [0002] Conventionally, image forming apparatuses used in the field of commercial printing have a known function of correcting the difference between images formed on the front and back of a duplex-printed recording medium to eliminate image misalignment between the front and back. [0003] For example, there is an image forming apparatus that outputs a dedicated chart before actual printing, makes a scanner read the dedicated chart and calculates a correction amount, and then corrects an image during actual printing based on the correction amount (for example, refer to Patent Document 1 ). [0004] However, in the image forming apparatus described above, the operator needs to perform an operation of causing the scanner to read the dedicated chart. In addition, since a dedicated chart needs to be output befo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H1/04B65H5/06B65H7/00G03G15/00
CPCB65H1/04B65H5/066B65H7/00G03G15/65B65H2701/1131G03G15/5029G03G15/6567G03G15/6594G03G15/231G03G15/5062G03G15/235G03G15/5095G03G2215/0485G03G2215/0059
Inventor 小林幸文
Owner RICOH KK