Ricoh Company, Ltd.

Masato Iio

Shinya Tanaka

Hiroshi Nakai

Masahide Yamashita

Tadashi Kasai

Kunio Hasegawa

Tsuyoshi Asami

Toshiyuki Kabata

Shinya Kobayashi

Naoyuki Ozaki

Masakazu Terao

Akio Tsujita

Takao Hiraoka

Hiroyuki Suhara

Kentarou Matsumoto

Hiroto Tachibana

Katsuhiro Shinohara

Takahiro Yoshida

Makoto Yasuda

Yuichi Aizawa

Shuuichi Endoh

Momoko Shionoiri

Hiroaki Suzuki

Hitoshi Yamamoto

Hiroyuki Fushimi

Takahiro Honda

Jun Yura

Takashi Bisaiji

Yuichi Ueno

Masaki Yoshino

Daisuke Miki

Osamu Endou

Kumiko Hatakeyama

Yoshihiro Sonohara

Mutsuki Morinaga

Yoichi Sakurai

Daisuke Mezaki

Yuuki Matsushita

Tomoko Kino

Masanori Kurosawa

Kathuhiro Shinohara

Provided is a medium including: a base material; and a print section over the base material, wherein the print section contains an alcohol compound having a boiling point of 180 degrees C. or higher and a viscosity of 30 mPa&#xb7;s or lower at 25 degrees C., and wherein the medium includes an adhesive section containing an isocyanate compound.

Medium, medium producing method, and medium producing apparatus

An active-energy-ray-curable composition including at least one monofunctional (meth)acrylate, at least one multifunctional (meth)acrylate, and at least one chlorinated-olefin-structure-containing polymer.

Active-energy-ray-curable composition, active-energy-ray-curable ink composition, composition stored container, two-dimensional or three-dimensional image forming apparatus, method for forming two-dimensional or three-dimensional image, cured product, and laminated cured product

An inkjet recording apparatus is provided. The inkjet recording apparatus includes a curable ink and a discharge head. The curable ink comprises a polymer having a polyester structural unit. The discharge head includes an individual liquid chamber including a circulation channel in which the curable ink is circulatable, and a nozzle from which the curable ink is dischargeable.

Inkjet recording apparatus, printer, and method for manufacturing cured product

A curable composition is provided. The curable composition comprises diethylene glycol dimethacrylate and a resin, and the following conditions (1) to (3) are satisfied:

Curable composition, curable ink, method for forming two-dimensional or three-dimensional images, apparatus for forming two-dimensional or three-dimensional images, cured product, structural body, and processed product

An active-energy-ray-curable composition including at least one monofunctional (meth)acrylate, at least one multifunctional (meth)acrylate, and at least one polyester-structure-containing polymer. Preferable is an aspect where the active-energy-ray-curable composition further includes a polymer obtained through polymerization of at least one selected from the group consisting of styrene, styrene derivatives, acrylic acid esters, and acrylic acid.

Active-energy-ray-curable composition, composition stored container, two-dimensional or three-dimensional image forming apparatus, method for forming two-dimensional or three-dimensional image, and cured product

An active energy ray curable composition is provided. The active energy ray curable composition includes a polymerizable monomer, a polymer component, a polymeric dispersant, and a pigment. The active energy ray curable composition is non-aqueous. The active energy ray curable composition has a yield value of 0.1 Pa or less either when having an initial weight or when being dried to have a weight 70% by mass of the initial weight.

Active energy ray curable composition, active energy ray curable ink, inkjet ink, stereoscopic modeling material, active energy ray curable composition container, two-dimensional or three dimensional image forming apparatus, two-dimensional or three-dimensional image forming method, cured product, and processed product

An image forming apparatus forms an image by exposing an image bearer on the basis of image data including at least one predetermined pattern. The image forming apparatus includes a processing device that sets an exposure amount of a plurality of exposure pixels. The predetermined pattern is constituted by the plurality of exposure pixels, and a peripheral region of the predetermined pattern in the image data is constituted by a plurality of non-exposure pixels. The processing device sets an exposure amount of an exposure pixel in a specific region that is adjacent to a boundary between the predetermined pattern and the peripheral region and is constituted by at least one exposure pixel in the predetermined pattern, and an exposure amount of an exposure pixel in a region other than the specific region in the predetermined pattern to values different from each other.

Image forming apparatus and image forming method to form an image based on image data including a pattern

An image forming method exposes a surface of an image bearer with light according to an image pattern including an image portion to form an electrostatic latent image, and includes: setting, among pixels constituting the image portion, at least a group of pixels existing at a boundary with respect to a non-image portion as a non-exposure pixel group, and at least a group of pixels existing at a boundary with respect to the non-exposure pixel group as a high power exposure pixel group; specifying, among the pixels constituting the image portion, a predetermined pixel as a target pixel, and a group of pixels existing at a boundary with respect to the non-image portion close to the target pixel as a boundary pixel group; and specifying a light power value of the target pixel based on image identification information acquired from the pixels constituting the image portion.

Image forming method and image forming apparatus including a high power exposure pixel group

An image forming method forms an electrostatic latent image corresponding to an image pattern including an image portion and a non-image portion by exposing a surface of an image bearer with light according to the image pattern. The image portion includes a plurality of pixels. Among the pixels constituting the image portion, at least a group of pixels existing at a boundary with respect to the non-image portion is set as a non-exposure pixel group. Among the pixels constituting the image portion, at least a group of pixels existing at a boundary with respect to the non-exposure pixel group is set as a high power exposure pixel group where exposure is performed with light of a higher light power value than a predetermined light power value required for exposing the image portion.

Image forming method, image forming apparatus, and print material production method to form an electrostatic latent image by selective light power exposure

An image forming apparatus includes a color toner image forming device, a fixing device, a cooling device, a colorless toner image forming device, and a control device. The color toner image forming device forms a toner image on a recording medium with a color toner. The fixing device heats the toner image on the recording medium to fix the toner image on the recording medium. The cooling device cools the fixed toner image. The colorless toner image forming device forms a toner image on the recording medium with a colorless toner having a storage elastic modulus of 100 or less and a loss tangent of 10 or greater at a heating temperature of the fixing device. The control device controls cooling power of the cooling device based on whether or not the colorless toner image forming device forms the toner image.

Image forming apparatus which includes a colorless toner image forming device

A toner including a petroleum wax, wherein the petroleum wax comprises a paraffin wax having a polarity.

Toner, printed material, method of preparing printed material and image forming apparatus having varnish application means

A color image forming method, including: forming electrostatic latent image on electrostatic latent image bearing member; developing the image to form visible image with at least two toners containing releasing agent and selected from black, magenta, cyan and yellow toners; transferring the visible image to recording medium; fixing the transferred image thereon with fixing member having no releasing agent on surface thereof; and forming overcoat layer on the fixed image by polymerizing overcoat composition, wherein when lightness&#x2014;L, chromaticity&#x2014;aand chromaticity&#x2014;baccording to L*a*b* color system of the fixed image formed with the at least two toners and lightness&#x2014;L, chromaticity&#x2014;aand chromaticity-bof the fixed image after the overcoat composition is dropped at 0.4 mg/cmfrom height of 10 mm above the fixed image and the overcoat composition is removed after 10 seconds have passed are applied to the following formula (1), color difference &#x394;E* is 3.0 to 30.0:&#x394;*=[(2&#x2212;1)+(2&#x2212;1)+(2&#x2212;1)]&#x2003;&#x2003;(1).

Color image forming method and color image forming apparatus

An apparatus for producing a detachable information sheet includes an image forming device, an applying and curing unit, and a heating and pressing unit. The image forming device includes an image bearing body, an electrostatic latent image forming unit to form an electrostatic latent image on the image bearing body, a development unit to develop the latent image with a toner to form a visible toner image, a transfer unit to transfer the toner image from the image bearing body onto a recording medium, and a fixing unit to fix the toner image on the recording medium. The applying and curing unit applies an energy-ray curable composition precursor onto the recording medium having the toner image fixed thereon, and cures the precursor to form an energy-ray curable composition to coat the recording medium. The heating and pressing unit heats and presses the recording medium coated with the energy-ray curable composition.

Apparatus for producing detachable information sheet and method of producing detachable information sheet

An overcoat composition for electrophotography includes at least one of compounds having the following formulae (1) to (3): wherein R1 represents a hydrogen atom or a methyl group; wherein R1 represents a hydrogen atom or a methyl group; and n represents an integer of from 4 to 6; and wherein R1 represents a hydrogen atom or a methyl group; and a and b independently represent an integer of from 1 to 5 on the condition that a+b is from 4 to 6.

Overcoat composition for electrophotography, electrophotographic image forming method and electrophotographic image forming apparatus

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Kanagawa, Japan

Masato Iio