Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Tomohide Mori

Yasuyuki Inada

Toshiaki Hiroi

Satoru Shibuya

Hidetoshi Noguchi

Hideo Yamaki

Yasuo Tanaka

Hideji Higashimura

Yasunori Nakayama

Yoshitada Karimai

An image forming apparatus includes: an image forming unit configured to form an image on a recording medium which is unwound from a state of being wound in a roll shape; and a control unit configured to change an image forming condition of the image forming unit such that image quality becomes uniform before and after an unwinding start position of the recording medium at the time of start of an image forming operation.

Image forming apparatus, image forming system and image forming condition controlling method

An image forming system includes: a transfer unit configured to transfer a toner image onto a recording medium conveyed from a state in which the recording medium is wound into a roll; an external diameter information sensing unit configured to sense information about an external diameter of the recording medium wound into the roll; and a control unit configured to change a transfer condition in the transfer unit in accordance with the external diameter information sensed by the external diameter information sensing unit.

Image forming system, image forming apparatus, and transfer condition changing method

An image forming apparatus includes: an image bearing member configured to be forwardly and reversely rotatable; a cleaning blade configured to make contact with the image bearing member and scrape toner remaining on the image bearing member; a toner retention section defined on an upstream side of the cleaning blade in a forward rotational direction of the image bearing member, the toner retention section being configured to retain toner scraped by the cleaning blade; a driving section configured to rotationally drive the image bearing member; and a control section configured to control the driving section to reversely rotate the image bearing member by a distance greater than a distance from a position where the image bearing member and the cleaning blade make contact with each other to an upper surface position of toner retained in the toner retention section, at a time when an image formation process is not performed.

Image forming apparatus

A toner image can properly be transferred onto the second side of a paper sheet without being influenced by the toner image on the first side. There are provided a detection unitfor detecting overlap of the toner images on the first side and the second side of the paper sheet based on image data, and a transfer output adjustment unitwhich changes a transfer voltage output for the second side in an area with the overlap of the toner images depending on the toner adhering amount of the first side.

An image-forming apparatus is provided with: an intermediate transfer belt that has a hard layer formed on a surface thereof and supports a toner image that has been primarily transferred on the hard layer from a latent-image supporting member; and a secondary transfer roller that is pressed onto the intermediate transfer belt supporting the toner image with an image-recording medium being interposed therebetween, wherein a toner is supplied to a non-image areain the contact areaof the surface of the intermediate transfer beltwith the image-recording medium at a rate of 0.01 to 0.20 g/m.

Image-forming apparatus

An image-forming apparatus comprises an intermediate transfer member having a hard release layer on the surface that receives a primarily transferred toner image from a latent image-supporting member on the hard release layer and secondarily transfers the toner image to an image-receiving medium, wherein,

Image-forming apparatus equipped with specified intermediate transfer member

Image-forming apparatus equipped with intermediate transfer member

An image-forming apparatus that is provided with an intermediate transfer member that has a hard releasing layer formed on the surface thereof, supports a toner image primary-transferred onto the hard releasing layer from a latent-image supporting member, and secondary-transfers the supported toner image onto an image-receiving medium, and a cleaning blade that is arranged in contact with the intermediate transfer member, and removes residual toner from the hard releasing layer of the intermediate transfer member, wherein the cleaning blade has an impact resilience in the range from 20 to 50% at 20&#xb0; C.

An image-forming apparatus, equipped with an intermediate transfer memberhaving a surface layer that holds a toner image primary-transferred from a latent image-supporting member temporarily on the surface layer and allows secondary transfer of the toner image held thereon to an image receiving medium,

Image forming apparatus having intermediate transfer member with residual surface potential characteristic

A secondary cleaning device has a cleaning brush, collection roller, and controller. The cleaning brush is driven by a drive mechanism and thereby rotates in a state that brush fibers thereof are contacting with a secondary transfer belt to collect toner on the secondary transfer belt. The collection roller is driven by another drive mechanism and thereby rotates in a state contacting with the cleaning brush to collect toner from the cleaning brush. The collection roller rotates in such a manner that the collection roller and the cleaning brush move in the same direction with each other at a contact area between the collection roller and the cleaning brush. The controller controls the drive mechanism such that the circumferential speed ratio of the collection roller with respect to the cleaning brush is greater than one and smaller than two.

Cleaning device and image forming apparatus having a cleaning brush and a collection roller that move in the same direction at a contact area therebetween

A cleaning device is provided with a conductive fur brush kept in contact with a transfer belt, a conductive brush kept in contact with the transfer belt upstream of the fur brush in the feed direction, and a single of constant-current d.c. power supply. The fur brush is connected to the constant-current d.c. power supply, and the conductive brush is grounded. A current flows from the constant-current d.c. power supply via the transfer belt to the conductive brush.

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Okazaki, Japan

Tomohide Mori