Canon Kabushiki Kaisha

Yuki Nishizawa

Akira Kuroda

Minoru Hayasaki

Aoji Isono

Tsutomu Shimano

Kohei Matsuda

Hiroshi Mano

Tetsuya Sano

Koji Nishikawa

Takaaki Tsuruya

Yuhei Terui

Michio Uchida

Shohei Yamashita

Koji Yamaguchi

Toru Oguma

Akira Kato

Toshio Miyamoto

Hiroki Ogino

Shinji Hashiguchi

Hiroyuki Yamazaki

Akimichi Suzuki

Yoichiro Maebashi

Seiji Uchiyama

Yasushi Katsuta

Seiji Obata

Yasuo Yoda

Hiroki Eguchi

Junko Hirata

Kaori Noguchi

Hiroshi Kita

Tatsuya Kobayashi

Kenichi Iida

Tomonori Sato

Masatoshi Itoh

Toshiaki Miyashiro

Ken Nakagawa

Katsuhisa Matsunaka

Tomoaki Nakai

Yoshitaka Zaitsu

Atsuyoshi Abe

Mahito Yoshioka

Koichi Hiroshima

Takaaki Akamatsu

Hiroaki Ogata

Kenji Takagi

Tatsunori Ishiyama

Kuniaki Kasuga

Kimitaka Ichinose

Taku Watanabe

Yasunari Kobaru

Masaki Shimomura

Eiichiro Teshima

Yusuke Jota

Shizuma Nishimura

Koji Uchiyama

Shigeto Tamura

Masatake Usui

Hiroshi Kawaguchi

Shun Sato

Kentaro Yamashita

Hirotomo Tamiya

Yusuke Isomi

Michio Sugano

Yasuhiro Kawasaki

Shuuichi Tetsuno

Yuichi Yajima

Yosuke Kitagawa

Chitose Tempaku

The powder adhesive comprises a thermoplastic resin and particles of an aromatic compound, wherein the particles of an aromatic compound are particles of a compound that has an aromatic ring and an azo bond bonded to the aromatic ring, or are particles of a compound comprising a heteroaromatic ring comprising nitrogen atom; the thermoplastic resin comprises an ester group; and, designating Es (mmol/g) as an ester group concentration in the thermoplastic resin, M (mass %) as a content of the aromatic compound particles in the powder adhesive, and N (mmol/g) as a nitrogen atom concentration in the aromatic compound particles, Es is from 1.0 mmol/g to 4.5 mmol/g, M is from 1.0×10mass % to 1.0×10mass %, and N is from 5.0 mmol/g to 15.0 mmol/g.

Powder adhesive and bonded article

An electrophotographic developer set comprising a toner, and a powder adhesive, wherein the powder adhesive comprises a crystalline polyester resin, and a thermoplastic resin other than the crystalline polyester resin; the amount of the crystalline polyester resin in the powder adhesive is 21% by mass or more; the melting point of the crystalline polyester resin is 55° C. to 100° C.; in a viscoelasticity measurement, where Gt'(100) denotes a storage elastic modulus of the toner at 100° C. and Gb′(100) denotes a storage elastic modulus of the powder adhesive at 100° C., Gb′(100) is 1.0×10Pa or less and Gt′(100)/Gb′(100) is 1.2 or more.

Electrophotographic developer set comprising toner and powder adhesive, and method for producing bonded product

An electrophotographic developer set comprising a toner comprising a thermoplastic resin and a wax, and a powder adhesive comprising a thermoplastic resin and a wax, wherein where Ea (mmol/g) denotes an ester group concentration of the wax contained in the toner, Na (mass %) denotes a content of the wax in the toner, Eb (mmol/g) denotes an ester group concentration of the wax contained in the powder adhesive, and Nb (mass %) denotes a content of the wax in the powder adhesive, the Ea, the Na, the Eb and the Nb satisfy the following formulae: 0.00≤Ea≤2.45, 2.50≤Eb≤3.60, and 0.80≤Nb/Na.

Electrophotographic developer set comprising toner and powder adhesive, method for producing bonded product, and powder adhesive

An image forming apparatus includes an image forming portion, a fixing portion configured to heat the toner image formed on the sheet by the image forming portion and fix the toner image to the sheet, a folding portion configured to fold the sheet having passed through the fixing portion such that a surface of the sheet to which the powder adhesive is applied is inside, and a bonding portion configured to heat the sheet folded by the folding portion and bond the sheet by the powder adhesive. A relationship of Tmax1>Tmax2 is satisfied, where Tmax1 (° C.) is a highest temperature of the powder adhesive when being heated by the fixing portion and Tmax2 (° C.) is a highest temperature of the powder adhesive when being heated by the bonding portion.

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.

An adhesion apparatus includes: an image forming unit configured to form, through an electrophotographic process, an adhesive image of a powder adhesive on a sheet that is conveyed; and a control unit configured to control the image forming unit to use a first pattern in a first conveyance period, and use a second pattern different from the first pattern in a second conveyance period following the first conveyance period, as a formation pattern in an adhering section corresponding to part of a width direction orthogonal to a conveyance direction of the sheet.

Adhesion apparatus for forming image of powder adhesive, and image forming apparatus

Provided is an electrophotographic developer set having a toner and a powder adhesive, wherein the toner comprises a thermoplastic resin A; the powder adhesive comprises a thermoplastic resin B and a wax A; the wax A has two or more ester groups in the molecule; the thermoplastic resin B has an ester group; and in a viscoelasticity measurement, with Gt'(100) (Pa) being a storage elastic modulus at 100&#xb0; C. of the toner, and Gb&#x2032;(100) (Pa) being a storage elastic modulus at 100&#xb0; C. of the powder adhesive, Gb&#x2032;(100) is 1.00&#xd7;10Pa or less, and Gt&#x2032;(100)/Gb&#x2032;(100) is 1.20 or more, as well as a method for producing a bonded product using the above electrophotographic developer set.

Electrophotographic developer set including toner and powder adhesive, and method for producing bonded product

A fixing apparatus includes a rotary member including a heat-generation layer with a plurality of rings, a temperature detecting portion configured to detect a temperature of the rotary member, a conduction detecting unit configured to detect a conduction failure in an opposing ring that is one of the plurality of rings of the heat-generation layer and that opposes the temperature detecting portion, and a controller configured to control the supply of power to the magnetic field generator. The conduction detecting unit includes a first magnetic core, a second magnetic core, and a current detecting portion that includes a detection coil. A length of one of the first magnetic core and the second magnetic core around which the detection coil is wound is less than a length of another of the first magnetic core and the second magnetic core around which the detection coil is not wound.

Fixing apparatus and image forming apparatus

An image forming system includes: a reading unit configured to read a test image, the test image having a determination image formed by overlapping a plurality of colors and a plurality of reference images formed with each of a plurality of reference colors; and a determination unit configured to determine a first color value of each of the plurality of reference colors based on a reading result of the reference images, determine a second color value of a plurality of pixels included in the determination image based on a reading result of the determination image, and determine whether an image defect has occurred based on an angle of a second vector corresponding to the second color value of the plurality of pixels with respect to a first vector corresponding to the first color value of each of the plurality of reference colors.

System, apparatus and computer program product for detecting image defects based on angles of respective vectors of a plurality of pixels and reference colors

An image forming apparatus includes an image forming portion configured to form a toner image on a recording material; a fixing portion configured to fix the toner image on the recording material by heating the toner image formed on the recording material; a flow path including a first space connecting with the fixing portion and a second space connecting with the first space and through which air discharged from the fixing portion passes; a first electrode portion provided in the first space and provided with a first potential; and a second electrode portion provided in the second space and provided with a second potential different from the first potential. An air speed of the air passing through the second space is slower than an air speed of the air passing through the first space.

An image heating apparatus including a sleeve having divided heat generating layers, an exciting coil provided in an inside space of the sleeve, a magnetic core provided inside the exciting coil, a temperature detecting element opposing one of the divided heat generating layers, and a current monitoring sensor. An induced current is generated in the divided heat generating layers by passing an alternating current through the exciting coil, and the divided heat generating layers generate heat. An image on the recording material is heated by the divided heat generating layers. The current monitoring sensor is configured to monitor a current flowing through the above-described one of the divided heating generating layers.

Electromagnetic induction image heating apparatus having a current monitoring sensor

A cylindrical fixing member for use with a fixing device includes a heat generating layer and an electrode layer contacting the heat generating layer. The electrode layer is smaller in volume resistance value than the heat generating layer. The electrode layer is formed in a helical shape so that a helical axis thereof extends in a direction along a generatrix direction of the fixing member. One end and the other end of the electrode layer are electrically open.

Cylindrical fixing member, fixing device and image forming apparatus

A fixing device for fixing an image on a recording material includes a cylindrical rotatable heater that is provided with a hole portion at least at a longitudinal end portion, and a driving member engaged with the longitudinal end portion of the heater to rotate the heater. The driving member is provided with a claw portion engaged with the hole portion of the heater. The image is fixed on the recording material by the heat from the heater. In addition, the heater is provided, at the other longitudinal end portion, with a slit extending toward a central portion, the slit being disposed at a position different from the hole portion with respect to a circumferential direction of the heater so as to overlap the hole portion in the longitudinal direction.

Fixing device having a cylindrical rotatable heating member that includes a hole and a slit at a longitudinal end portion

An image forming apparatus includes an input unit configured to input image data, an image forming unit configured to form an image on a recording material based on the input image data, a reading unit configured to read the image formed on the recording material, and a control unit configured to, based on the input image data and the image read by the reading unit, acquire a plurality of change amounts from the read image, and determine a type of an abnormal image based on a plurality of the acquired change amounts.

Image forming apparatus and abnormality determination method

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Yokohama, Japan

Yuki Nishizawa