Image forming apparatus and conveyance speed control method
A technology of conveying speed and control method, which is applied to the electrical recording process using charge graphics, equipment, transportation and packaging of the electrical recording process using charge graphics, and can solve problems such as impact noise and large return volume of strip paper S1 , to achieve the effect of inhibiting relaxation
Inactive Publication Date: 2018-08-14
KONICA MINOLTA INC
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[0008] Therefore, when the rear end of the strip of paper S1 passes the pair of registration rollers 53a, or the pair of registration rollers 53a is separated during the conveyance of the strip of paper S1, as Figure 1C As shown in , there is a possibility that the return amount of the long strip of paper S1 becomes large, and image defects such as impact noise may occur in the transfer nip.
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[0028] Hereinafter, this embodiment will be described in detail based on the drawings. figure 2 It is a diagram schematically showing the overall configuration of the image forming apparatus 1 of the present embodiment. image 3 The main part of the control system of the image forming apparatus 1 of this embodiment is shown.
[0029] The image forming apparatus 1 of the present embodiment uses long paper or non-long paper as the paper S, and forms an image on the paper S.
[0030] In the present embodiment, the strip paper is cut-sheet paper whose length in the transport direction is longer than that of commonly used A4-size and A3-size paper, and has a length that cannot be accommodated in the paper feed tray units 51a to 51c inside the machine. Hereinafter, simply referring to "paper" can include both strip paper and non-strip paper.
[0031] The image forming apparatus 1 is a color image forming apparatus of an intermediate transfer method using electrophotographic techn...
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The invention provides an image forming apparatus and a conveyance speed control method which suppress generation of a low-quality image caused by loosening of a paper sheet between a transfer nip anda conveyance member, in the transfer nip. The image forming apparatus includes: a transferer that forms a transfer nip for transferring an image on a paper sheet; a conveyance member that is disposedupstream from the transfer nip in a conveyance direction of the paper sheet; and a controller that increases a conveyance speed of the paper sheet in the conveyance member relative to a conveyance speed of the paper sheet in the transferer and controls conveyance of the paper sheet to loosen the paper sheet between the transfer nip and the conveyance member, wherein the controller changes a conveyance speed of the paper sheet in the conveyance member in accordance with a conveyance amount of the paper sheet in the conveyance member.
Description
technical field [0001] The present invention relates to an image forming apparatus and a transport speed control method. Background technique [0002] Generally, an image forming apparatus (printer, copier, facsimile, etc.) using electrophotographic technology irradiates (exposes) a charged photoreceptor drum (image carrier) with laser light based on image data to form an electrostatic latent image. Then, toner is supplied from the developing device to the photoreceptor drum on which the electrostatic latent image is formed, whereby the electrostatic latent image is visualized and a toner image is formed. Then, after the toner image is directly or indirectly transferred to the paper, it is fixed by heating and pressing through the fixing nip, thereby forming a toner image on the paper. [0003] On the upstream side of the transfer nip where the image is transferred to the sheet, as a pair of transport rollers, for example, a pair of registration rollers is provided (for exa...
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IPC IPC(8): G03G15/16G03G15/00
CPCG03G15/1605G03G15/6558B65H5/062B65H9/002B65H2301/51212B65H2511/11B65H2511/112B65H2513/10G03G15/6561B65H2220/01B65H2220/02B65H7/20
Inventor 盐川康夫川上嘉辉大久保贵弘
Owner KONICA MINOLTA INC