Canon Kabushiki Kaisha

Shigeru Kasahara

Takayuki Fujii

Akinobu Nishikata

Mitsushige Murata

Keizo Isemura

Kuniyasu Kimura

Toshio Hayashi

Akihiko Sakai

Hiroaki Tomiyasu

Yuichi Seki

Yoshihiro Funamizu

Masatoshi Tanabe

Shigeo Aoyagi

Jun'ichi Intoh

An electrophotographic image forming apparatus that are capable of reducing the variation of the rise time of the laser light source due to the temperature change of the laser light source with a simple configuration. A laser light source emits a laser beam according to a driving signal in order to expose an image bearing member. A voltage detection unit detects terminal voltage of the laser light source. A drive unit has a voltage source that can control output voltage and supplies current corresponding to the output voltage of the voltage source to the laser light source when making the laser light source emit the laser beam according to the driving signal. A control unit controls the voltage source so that the output voltage of the voltage source generates current overshot to a target current based on the detection result of the voltage detection unit.

Electrophotographic image forming apparatus

An image forming system including first and second image forming apparatuses that includes a first image forming unit configured to form an image on a first surface of recording paper, a discharging unit configured to discharge the recording paper on which the image is formed by the first image forming unit to the second image forming apparatus, a second image forming unit configured to form an image on a second surface of the recording paper discharged by the discharging unit from the first image forming apparatus, and a correction unit configured to correct adjustment timing of the image forming system as a whole so that first adjustment timing for performing an adjustment operation of an output image formed by the first image forming unit and second adjustment timing for performing an adjustment operation of an output image formed by the second image forming unit accord with each other.

Image forming apparatus and image forming system

A sheet processing device is provided which is adapted to process bundles of sheets, each bundle defined by opposing first and second bundle edges, each bundle including a sealing sheet having a larger size than the sheets which form the bundle, the sealing sheet including a sealing portion which projects away from the second bundle edge. The device includes an abutting member adapted to abut against the first bundle edge; a folding unit adapted to fold the bundle between the first and second bundle edges; and a processing unit adapted to seal the bundle using the sealing portion of the sealing sheet, wherein the sealing portion is overlapped over the second and first bundle edges to form a seal.

Sheet processing device and image forming device

In an image forming apparatus which requires the user to manually input sheet medium information, (when a bundle of sheets which include a plurality of types of print media are to be printed, the user must manually input setups of the image forming apparatus for each individual print medium. In manual setups by the user, some setups require user's knowledge about print media. When the user has made wrong setups, a print result cannot be obtained under an appropriate control condition Furthermore, when information about a print medium is sensed by the sensor without manual setups, the information cannot be often precisely detect depending on the type and thickness of the print medium, an environment, and the like, and it is consequently difficult to attain optimal image formation. It is an object of this invention to attain optimal image formation, saving user labor and shortening the print time by using a radio tag attached to the sheet medium. An image forming apparatus which forms an image on a sheet medium, has means for reading information from a information holding means, such as a minuscule radio chip, attached to the sheet medium, and means for manually inputting information of the sheet medium, and controls an image forming condition using either information.

Image forming apparatus with control of image formation using read information

Growing community of inventors

Tokyo, Japan

Shigeru Kasahara