Ricoh Company, Ltd.

Fuji Xerox Co., Ltd.

Hitachi-lg Data Storage, Inc.

Fujifilm Business Innovation Corp.

Takeda Pharmaceutical Company Limited

Hitachi Media Electronics Co., Ltd.

Takasago International Corporation

Nikka Seiko Co., Ltd.

Daisuke Tomita

Takeshi Shintani

Nobuo Kuwabara

Shinichi Kawahara

Akio Kosuge

Norio Kudo

Kenji Honjoh

Yasuo Kadokura

Satoshi Hatori

Norio Kudoh

Atsushi Sugawara

Hiroyuki Uenishi

Yasuhiro Maehata

Shinya Karasawa

Kohsuke Yamamoto

Yasuhito Kuboshima

Satoshi Miura

Kentaro Osawa

Sakiko Hirai

Toshiya Satoh

Masaru Takahashi

Yukiaki Nakamura

Takaya Muraishi

Shinichi Imamura

Yuta Azeyanagi

Yusuke Ishizuka

Yoshinori Ozawa

Takahisa Tatekawa

Naoki Tomita

Akira Matsumoto

Daisuke Noguchi

Naohiro Kumagai

Kazuhiko Nakamura

Koichi Watanabe

Kaoru Yoshino

Satoru Matsuda

Tomoto Kawamura

Hiroshi Nakazawa

Kazuyoshi Yamazaki

Akira Fujimori

Takeshi Fukao

Hiroshi Mizusawa

Hideyasu Seki

Yasushi Akiba

Hiroshi Banno

Hironobu Maezaki

Ryohta Gotoh

Yusuke Tominari

Tomohiko Saito

Noriyuki Nii

Yuji Isshiki

Michiko Tawada

Hajime Teraji

Takahiro Yamashita

Douglas Robert Cary

Naoko Senda

Moriteru Asano

Ryo Mizojiri

Takao Watanabe

Yasushi Hattori

Takeshi Iwanaga

Takahiro Kurokawa

Tomoko Takahashi

Yoshifumi Iida

Naomi Sugimoto

Hideki Kosugi

Katsuhiko Kimura

Toshihiro Hamamura

Yuka Zenitani

Makoto Yasuda

Yuuji Wada

Masakatsu Shibasaki

Ryo Imai

Daisuke Ishizuka

Takeshi Kojima

Takuto Kojima

Satoshi Kamiwaki

Michiya Okamoto

Takuma Iwasaki

Masashi Toyofuku

Motomu Kanai

Hiromichi Ninomiya

Tomohiro Kaku

Yasunari Harada

Jun Hato

Shinya Nakashima

Kunihiko Nishioka

Mitsuhiro Ito

Shinji Morimoto

Shotaro Takahashi

Yoshitaka Morimoto

Daisuke Sawada

Akio Yabe

Keita Yamamoto

Tsutomu Furuta

Krista E Gipson

Kentaroh Nodera

Masanori Moro

Yasukazu Kitamura

Kazuhiro Todori

A method of producing resin particles includes a first step of adding a monomer-containing emulsified liquid that contains a polymerizable monomer and an aqueous medium to an aqueous mother medium to polymerize the polymerizable monomer; and a second step of adding an aqueous medium for cooling to the aqueous mother medium after completion of the addition of the monomer-containing emulsified liquid to the aqueous mother medium.

Method of producing resin particles and method of producing electrostatic charge image developing toner

A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles. The aggregating includes stirring the dispersion in the aggregating at a required stirring power of 1.0 kW/mor more and 6.0 kW/mor less per unit volume, and the preparing method satisfies the following Requirement (1), in which

Preparing method of electrostatic charge image developing toner, electrostatic charge image developing toner, and electostatic charge image developer

A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 μm or more and 1 μm or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.

Resin fine particle, thermoplastic resin particle, and method for producing resin fine particle

A method for producing a toner for developing an electrostatic charge image includes aggregating at least resin particles and releasing agent particles contained in a dispersion to form aggregated particles; heating and fusing the aggregated particles to prepare a dispersion containing fused particles; and cooling the dispersion containing the fused particles to a temperature equal to or lower than a temperature 30° C. lower than an endothermic peak onset temperature derived from a releasing agent that constitutes the releasing agent particles, in which, in the cooling, the dispersion is cooled at a rate of 30° C./min or more and 130° C./min or less.

Method for producing toner for developing electrostatic charge image, and toner for developing electrostatic charge image

A resin fine particle includes a polyester resin; and a basic dye, in which a volume average particle diameter of the resin fine particle is 0.05 μm or more and 1 μm or less, and a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle is 0.8 or more.

An electrostatic image developing toner includes toner particles containing a binder resin. In a differential scanning calorimetry curve of the toner particles, Tg1 is 58&#xb0; C. or more and 68&#xb0; C. or less, and Tg1&#x2212;Tg2 is 20&#xb0; C. or more and 40&#xb0; C. or less, where Tg1 is a lowest onset temperature in an endothermic change during a first temperature increase, and Tg2 is a lowest onset temperature in an endothermic change during a second temperature increase.

Electrostatic image developing toner, method for producing electrostatic image developing toner, electrostatic image developer, toner cartridge, process cartridge, and image forming apparatus

An image projection device includes a projector configured to project an image; and an operation unit configured to receive an operation performed by an operator. The projector is in a projecting state while the operation unit is receiving a pressing operation performed by the operator, and the projector is in a non-projecting state while the operation unit is not receiving a pressing operation performed by the operator.

Image projection device

An electrostatic charge image development toner satisfies the following: a maximum slope of an absolute value of log (loss modulus G&#x2033;) from 60&#xb0; C. to 90&#xb0; C. is 0.07 or more and 0.16 or less; a maximum slope of an absolute value of log (loss modulus G&#x2033;) from 90&#xb0; C. to 130&#xb0; C. is 0.08 or less; and G&#x2033;(60) is 5.0&#xd7;10Pa or more and 1.0&#xd7;10Pa or less, where G&#x2033;(60) is a loss modulus at 60&#xb0; C.

Electrostatic charge image development toner and electrostatic charge image developer

An electrostatic-image developing toner includes toner particles including a binder resin including an amorphous resin including a polyester resin segment and a styrene acrylate resin segment and a release agent. The content of 5'-chloro-3-hydroxy-2&#x2032;-methoxy-2-naphthanilide in the electrostatic-image developing toner is 1,000 ppm by mass or less.

Electrostatic-image developing toner, electrostatic-image developer, and toner cartridge

An electrostatic image developing toner includes toner base particles including at least a binder resin and a release agent, wherein the binder resin includes a hybrid resin having a polyester resin segment and a styrene-acrylic copolymer segment, and a molecular weight distribution curve of the toner satisfies Formula (1): 1.3&#x2264;b/a&#x2264;2.5, where, in the molecular weight distribution curve in which a perpendicular line is drawn from a baseline to a peak top having a peak top height to divide the molecular weight distribution curve into a lower-molecular-weight region and a higher-molecular-weight region, a represents a width of the lower-molecular-weight region at a height of 15% of the peak top height, and b represents a width of the higher-molecular-weight region at a height of 15% of the peak top height.

Electrostatic image developing toner, electrostatic image developer, and toner cartridge

The optical module for optical height measurement includes a laser light source, an irradiation optical system, a detection optical system, and a detector. The laser light source is configured to irradiate the layer-structured specimen with a light beam. The irradiation optical system includes an objective lens. The objective lens is located to be approximately perpendicular to the layer-structured specimen. The detection optical system is configured to guide a reflected light reflected by the layer-structured specimen and a light passing through the objective lens and an aperture-restrictor-for-return to the detector. The aperture-restrictor-for-return is located immediately after the objective lens. The aperture-restrictor-for-return is configured to restrict the reflected light and cause only a light in a high NA region to pass through. The detector is configured to convert an entered light into a light detection signal. The detector includes a multi-divided detector array.

Optical module for optical height measurement

An electrostatic charge image developing toner has a surface property index value represented by Formula S of 2.0 to 2.8, an electrostatic charge image developing toner has a surface property index value represented by Formula S of more than 2.8 and 3.5 or less, and an electrostatic charge image developing toner has a surface property index value represented by Formula S of more than 1.0 and less than 2.0 and a calculated value of a specific surface area in Formula S of 0.70 to 1.3:(Surface property index value)=(Measured value of specific surface area)/(Calculated value of specific surface area)&#x2003;&#x2003;Formula S

Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge

A protective film material for laser processing comprises a solution of a water-soluble adhesive and a water-soluble laser beam absorbent added to adjust absorbance at a wavelength of 355 nm (absorbance as calculated as a 200-times diluted solution) to 0.3 to 3. The protective film effectively absorbs an irradiated laser beam, reduces generation of debris during laser beam irradiation, and can be removed by washing with water after completion of the laser processing treatment, thereby providing reliable processing. The water-soluble adhesive is preferably a blend of polyvinyl alcohol and poly-N-vinyl acetamide, which are preferably blended at a ratio of 100 to 200:1 in terms of amounts of respective components.

Protective film material for laser processing and wafer processing method using the protective film material

An electrostatic-image developing toner includes toner particles including a binder resin including an amorphous resin including a polyester resin segment and a styrene acrylate resin segment and a release agent. The content of 1-amino-2-methoxybenzene in the electrostatic-image developing toner is 200 ppm by mass or less.

A charging device is detachably attachable with respect to a body of an image forming apparatus. The charging device includes a charging roller and a cleaning member. The charging roller charges an image bearer. The cleaning member cleans the charging roller. The cleaning member has a higher cleaning performance on the charging roller during detachment in which the charging device is detached from the body of the image forming apparatus than during attachment in which the charging device is attached to the body of the image forming apparatus.

Charging device, process cartridge, and image forming apparatus

Growing community of inventors

Kanagawa, Japan

Daisuke Tomita