Canon Kabushiki Kaisha

Max Co., Ltd.

Fujitsu Corporation

Oki Electric Industry Co., Ltd.

The Furukawa Electric Co., Ltd.

Paramount Bed Company, Limited

Max Kabushiki Kaisha

Junichi Tamura

Hayato Ida

Takaho Shibata

Ryuji Murayama

Daisuke Yamashita

Takashi Hirasa

Yuya Chimoto

Atsushi Sakurai

Tetsuo Kosaka

Katsuhiko Murayama

Kentaro Kamae

Tomoyo Miyakai

Kouichirou Ochi

Yuichi Mizo

Hiroyuki Sato

Hajime Takemura

Takeo Fujiyama

Jinichi Yoshizawa

Akemi Watanabe

Ran Wakayama

Hironori Minagawa

Masaharu Miura

Ryo Natori

Kenta Mitsuiki

Iwao Shimotakahara

Hideya Moridaira

Nobuyuki Endo

Yuji Fujiki

Hiroki Goko

Masakazu Konishi

Megumi Shino

Hiroomi Tateishi

Takeshi Nagayasu

Mitsuhisa Machida

Fumihiro Wajima

Katsuyuki Katoh

Ali Elhadri

Mao Yoshida

Yosuke Yamazaki

Hiroshi Matsuo

Hiroshi Tanaka

Jun Tanaka

Masakazu Fujiki

Koh Ishigami

Fumihiko Abe

Takashi Aso

Hisashi Koaizawa

Yasunori Ohora

Haruo Yamashita

Yasushi Nakagawa

Wakiko Katsumata

Akihiro Yasuo

Tomohiro Shinomiya

Kazuhisa Shirayama

Makoto Kosuge

Yoshihiro Kaneko

Katsuhiko Kawasaki

Ryoichi Hara

Takeshi Fujita

Yoshio Sakata

Yutaro Yoshida

Hiroichi Nara

Yoshio Tokuno

Yumiko Uehara

Shigeatsu Samukawa

Hisasuke Kajihara

Masao Hayashi

Masayoshi Sekido

Koichi Kohama

Nobuyuki Umeda

To provide a toner having both low temperature fixability and hot offset resistance and having excellent scratch resistance of a fixed image. A toner including a toner particle containing a binder resin, a crystalline polyester, and a calcium carbonate particle, in which the crystalline polyester includes a unit derived from an aliphatic diol and a unit derived from an aliphatic dicarboxylic acid, an ester group concentration Ec of the crystalline polyester is 27% by mass or more to 50% by mass or less, a content Ma of the calcium carbonate particle included in the toner particle is 3% by mass or more to 40% by mass or less, and a ratio (Ma/Mc) of the content Ma of the calcium carbonate particle included in the toner particle to a content Mc (% by mass) of the crystalline polyester included in the toner particle is 0.2 or more to 20 or less.

Toner and method for producing the same

A bed system includes: an imaging device; a bed on which the imaging device is to be installed; and a controller configured to process an image acquired by the imaging device to predict a possibility of overturning of a user, in which, when it is determined that a state of the user is a first state, the controller predicts the possibility of overturning of the user based on a first parameter, when it is determined that the state of the user is a second state, the controller predicts the possibility of overturning of the user based on a second parameter, the first state is a state of the user different from the second state, and the first parameter is different from the second parameter.

Bed system

A toner classification apparatus comprising a classification rotor, wherein the classification rotor comprises a first vane group containing first vanes and a second vane group containing second vanes, the second vanes have a length shorter than the first vane group; the number of second vanes, which are disposed between two adjacent first vanes, is 1 to 2, independently; each of the first vanes draws first trajectory and each of the second vanes draws second trajectory when the classification rotor rotates, a distance from the center of rotation to an outer circumference side end of the first and second trajectory are defined as L1 and L3, respectively, and a distance from the center of rotation to the center side end of the first and second trajectory are defined as L2 and L4, respectively, L1 to L4 satisfy prescribed relationships, and a toner production method using the toner classification apparatus.

Toner classification apparatus and a toner production method

A toner classification apparatus comprising a classification rotor in which the classification rotor has a vane A which extends from a rotation center direction of the classification rotor to an outer circumference direction thereof and a vane B having a length longer than that of the vane A, the vane A, and the vane B are disposed so as to satisfy a predetermined relationship, and a toner production method comprising a classification step of carrying out a classification process on particles to be classified by using the toner classification apparatus.

Toner classification apparatus and toner production method

Toner classification apparatus comprising classification rotor comprising a plurality of vanes extending from rotation center side of classification rotor to outer circumference side of classification rotor; the plurality of vanes are disposed with prescribed gaps established between vanes; gaps form opening facing rotation center region of classification rotor; each of vanes is disposed such that portion of vane away from of center of rotation of classification rotor is located on more upstream side in a direction of rotation of classification rotor than portion of vane closer to center of rotation of classification rotor; each of vanes has elbow; and in a horizontal cross section provided by sectioning classification rotor in a rotational axis perpendicular direction of classification rotor, shape of vane satisfies prescribed formulae, as well as toner production method comprising classification step of carrying out classification process on particles to be classified by using toner classification apparatus.

A toner having a toner particle containing a binder resin and a styrene-acrylic resin, the toner being characterized in that the styrene-acrylic resin is a graft polymer having an aliphatic hydrocarbon compound segment and a styrene-acrylic segment, the styrene-acrylic segment has a specific monomer unit, the melting point of the styrene-acrylic segment is from 30&#xb0; C. to 80&#xb0; C., and when the toner is measured using a FT-IR ATR method, the intensity assigned to the styrene-acrylic resin and the intensity assigned to the binder resin satisfy a specific relationship.

Toner

A toner comprises a toner particle including a binder resin, and inorganic fine particles A and silica particles B, wherein the inorganic fine particle A has a rectangular parallelepiped shape; an amount of the inorganic fine particles A is 0.3 to 3.0 mass parts per 100 mass parts of the toner particles; a number average particle diameter of the silica particles B is 80 to 200 nm; a fixing ratio of the inorganic fine particle A is 25% to 70%; where a separation amount of the inorganic fine particles A is denoted by YA (mg), and a separation amount of the silica particles is denoted by YB (mg), YA is 3.00 to 18.0, YA and YB satisfy the following formula,&#x3e;0.75, and a surface potential difference C in a rubbing test using the inorganic fine particle A and the binder resin is &#x2212;70 V to +70 V.

Toner and image forming method

A toner comprises a toner particle and an external additive, the toner satisfies a certain relationship with regard to &#x3c3;l (C/m) and &#x3c3;s (C/m). The toner is divided into two groups i.e. a first group and a second group with inertial classifier, the first group including a larger size of the toner particles, and the second group including a smaller size of the toner particles, and the number of the toner particles in the first group being substantially equal to the number of the toner particles in the second group. Then, al (C/m) represents an absolute value of average surface charge density of the toner included in the first group, and &#x3c3;s (C/m) represents an absolute value of average surface charge density of the toner included in the second group.

A toner includes a toner particle containing a binder resin and a silica fine particle A on a surface of the toner particle, wherein D50 on a number basis of the toner is 3.0 to 6.0 the silica fine particle A is a particle having a particle diameter of 80 to 500 nm, the particle diameter being confirmable by observing the toner with a SEM, and when the average coverage with the silica fine particle A determined by image analysis of a particle group of a small particle diameter side of the toner with a SEM is set to Sand the average coverage with the silica fine particle A determined by image analysis of a particle group of a large particle diameter side of the toner with a scanning electron microscope is set to S, Sis 20 to 70 area %, Sand Ssatisfy S/S&#x2264;0.80.

A toner comprising: a toner particle that contains a resin component and a silicone compound, wherein the resin component contains at least 50 mass % of olefin resin; a content of the silicone compound is from 1 mass part to 42 mass parts per 100 mass parts of the resin component; a weight-average molecular weight of the silicone compound as measured by GPC is from 1,000 to 25,000; and a content, in a molecular weight distribution of the silicone compound as measured by GPC, of a component having a weight-average molecular weight of not more than 500 is not more than 0.05 mass % of the silicone compound.

A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin copolymer including ester group having specific structures Y1 and Y2 and an olefin copolymer including acid group having an acid value of from 50 mg KOH/g to 300 mg KOH/g, the amount of the olefin copolymer including ester group is 50% by mass or more, the toner particle has a surface layer including the olefin copolymer including acid group which has formed a salt with a metal, the metal is at least one metal selected from the group consisting of Mg, Ca, Sr, Al, and Zn, and the total amount of the metal in the toner is from 25 ppm to 500 ppm.

Toner and method for producing toner

A toner including a toner particle having a core-shell structure that has a core formed from a resin 1 and a shell formed from a resin 2 on the surface of the core, wherein the resin 1 contains more than 50 mass % of an ester group-containing olefin-based copolymer, the ester group-containing olefin-based copolymer has a monomer unit Y1 represented by formula (1) below, and at least one type of monomer unit Y2 selected from the group consisting of monomer units represented by formula (2) and formula (3) below, the ester group concentration in the ester group-containing olefin-based copolymer is from 2 mass % to 18 mass %, and the resin 2 is an amorphous resin having a Tg value of from 50&#xb0; C. to 70&#xb0; C. 

A toner includes a toner particle containing a resin component containing an olefin copolymer, wherein the olefin copolymer includes a specific monomer unit Y1 and a specific monomer unit Y2, and the content of the olefin copolymer in the resin component is more than 50 mass % based on the total mass of the resin component, and the olefin copolymer has a melting point of 80&#xb0; C. or more and 150&#xb0; C. or less.

Toner and method of producing toner

A toner comprising a toner particle that contains a hybrid resin A and a crystalline polyester resin B, wherein the hybrid resin A has a polyester segment, and a polypropylene glycol segment that has a number-average molecular weight of at least 300, the polyester segment has a structure derived from a condensation reaction between a dicarboxylic acid and a diol, and has an aromatic ring in at least one of the dicarboxylic acid and the diol, and the following condition is satisfied:||&#x3c;1where, SPh is SP value of the polyester segment of the hybrid resin A, SPc is SP value of the crystalline polyester resin B, and SPp is SP value of the polypropylene glycol segment of the hybrid resin A.

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Toride, Japan

Junichi Tamura