Canon Kabushiki Kaisha

Junko Hirata

Kohei Matsuda

Yasushi Katsuta

Koji Yamaguchi

Toru Oguma

Akira Kuroda

Tsutomu Shimano

Hiroki Ogino

Yuki Nishizawa

Kaori Noguchi

Yoshihiro Ogawa

Takashige Kasuya

Hiroomi Matsuzaki

Makoto Hayashida

Yusuke Hasegawa

Katsuhisa Yamazaki

Masami Fujimoto

Daisuke Yoshiba

Fumito Nonaka

Kazuki Matsumoto

Shuichi Hiroko

Kazunori Hashimoto

Tetsuya Nishiguchi

Yasunori Toriyama

Syuhei Moribe

Kouji Nishikawa

Miho Okazaki

An image forming apparatus, to which a cartridge including a developer accommodating portion for accommodating a developer is detachably mountable, includes an image bearing member, an exposure unit configured to expose the image bearing member to light to form an electrostatic latent image on the image bearing member, a light receiving sensor provided in the cartridge and configured to receive the light emitted from the exposure unit, and a controller configured to detect vibration of the cartridge from a light reception value of the light received by the light receiving sensor. In a case in which the cartridge is removed from the image forming apparatus, the light receiving sensor is removed from the image forming apparatus together with the cartridge.

Image forming apparatus

An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.

The object of the present invention is to provide a magnetic toner enabling an image with high image density and excellent image reproducibility to be obtained, which is excellent in fluidity, charging stability, and charging uniformity, even for long-term use, and also enabling an image whose fogging, ghost, and scattering are suppressed to be obtained. The magnetic toner has at least a binder resin and a magnetic material, where, the magnetic material is an magnetic iron oxide whose dielectric breakdown voltage of the magnetic material is 160 to 1600 V/cm, and the dielectric loss tangent (tan &#x3b4;) of the magnetic toner at 100 kHz and 40&#xb0; C. is 2.0&#xd7;10to 1.0&#xd7;10.

Magnetic toner

Growing community of inventors

Shizuoka, Japan

Junko Hirata