Ricoh Company, Ltd.

Rocoh Company, Ltd.

Hitoshi Iwatsuki

Takashi Fujita

Koichi Sakata

Shigenori Yaguchi

Kimitoshi Yamaguchi

Hiroyuki Kishida

Yasuyuki Yamashita

Nozomu Tamoto

Yasuo Suzuki

Akira Saito

Minoru Masuda

Mitsuru Naruse

Hisashi Nakajima

Yutaka Takahashi

Toyoshi Sawada

Shinichiro Yagi

Hideki Sugiura

Tomoyuki Ichikawa

Shinya Nakayama

Yasuaki Iwamoto

Kousuke Suzuki

Osamu Uchinokura

Masami Tomita

Hiroshi Hosokawa

Kazuhiko Watanabe

Akihiro Kotsugai

Yasuo Asahina

Satoshi Mochizuki

Masayuki Ishii

Masashi Nagayama

Toshio Koike

Kenji Kikuchi

Shinji Tamaki

Junichi Awamura

Shunji Katoh

Toyoaki Tano

Hiroshi Tohmatsu

Mariko Takii

Kiichi Kamoda

Sohichiroh Iida

Shinzo Higuchi

Saori Yamada

Kenichi Mashiko

Kazumi Ohtaki

Tomio Kondou

Yasutomo Aman

Tomoko Utsumi

Toshiyuki Mutoh

Toshiyuki Iseki

Yunsheng Sun

Tomio Kondoh

Satoshi Ogawa

Takuya Saito

Hiroshi Ikeguchi

Yasutada Shitara

Akinori Saitoh

Yoshihiro Murasawa

Michiharu Suzuki

Shinnosuke Koshizuka

Teruki Kusahara

Takeo Yamaguchi

Keinosuke Kondoh

Tomomi Suzuki

Kohsuke Suzuki

Shinsuke Nagai

Kazufumi Kimura

Yumiko Yagi

Kohichi Sakata

Yuuki Kamon

Yuuya Endoh

Yoshihiko Furugohri

Masahide Yamada

Sohichiroh Lida

Masami Pasco Grand Mansion Shinnumazu 302 Tomita

Shinya Grand River A 201 Nakayama

A resin powder for solid freeform fabrication has a 50 percent cumulative volume particle diameter of from 5 to 100 μm and a ratio (Mv/Mn) of a volume average particle diameter (Mv) to the number average particle diameter (Mn) of 2.50 or less and satisfies at least one of the following conditions (1) to (3):

Resin powder for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 μm, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.

A fiber aggregation contains fiber containing a thermoplastic resin, each of the fiber being mutually joined and aligned.

Fiber aggregation, short fiber and method of manufacturing the same, and film and method of manufacturing the same

Provided is a resin particle producing method including: a fiber aggregate producing step of directly joining fibers containing a thermoplastic resin with each other to obtain a fiber aggregate; and a particle forming step of forming the fiber aggregate into particles to obtain resin particles.

Resin particle producing method

A resin powder for solid freeform fabrication has a 50 percent cumulative volume particle diameter of from 5 to 100 &#x3bc;m and a ratio (Mv/Mn) of a volume average particle diameter (Mv) to the number average particle diameter (Mn) of 2.50 or less and satisfies at least one of the following conditions (1) to (3):

A powder for solid freeform fabrication includes a first resin particle and a second resin particle, wherein MFRis greater than MFRand a ratio of MFRto MFRis from 2 to 5, where MFRrepresents a melt mass-flow rate (MFR) of the first resin particle and MFRrepresents a melt mass-flow rate of the second resin particle.

Powder for solid freeform fabrication and method of manufacturing solid freeform fabrication object

A resin powder contains a resin contains columnar particles, wherein the proportion of the columnar particles having a ratio (L/W) of less than 1 is 50 percent by volume or more in the total volume of the resin powder, where W represents the width in the radial direction of the columnar particles and L represents the length in the axis direction of the columnar particles.

Resin powder and method of manufacturing solid freeform fabrication object

A resin powder contains a resin, wherein the proportion of fine powder having a number diameter of 40 percent or less of a mean number diameter Mn of the resin powder is 30 percent or less in the resin powder.

Resin powder, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 &#x3bc;m, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.

Resin powder having pillar shape and specific circularity for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication, having a melting point of 100 degrees C. or higher as measured according to ISO 3146 regulation and a ratio of melt mass-flow rate B to melt mass-flow rate A of greater than 0.80 to 1.20, wherein the melt mass-flow rate A and the melt mass-flow rate B are respectively measured at 15 degrees C. higher than the melting point under a load of 2.16 kg according to JIS K7210 format before and after the resin powder is maintained at a temperature 15 degrees C. lower than the melting point under a pressure of 0.1 kPa for four hours.

Resin powder for solid freeform fabrication, device for fabricating solid freeform fabrication object, and resin powder

A particle for solid freeform fabrication having a columnar form has end surfaces and a side surface, wherein one of the end surfaces partially covers the side surface.

Particle for solid freeform fabrication, powder for solid freeform fabrication, device for manufacturing solid freeform fabrication object, method of manufacturing solid freeform fabrication object, and particle

A resin powder for solid freeform fabrication includes resin particles having a significantly pillar-like form including resin particles having a concave portion on the circumferential side surface.

Resin powder for solid freeform fabrication and device for solid freeform fabrication object

A fabrication method includes laminating a fabrication material to form an object, and applying a release material on a surface of the object to form a release layer on the surface of the object. A surface free energy of the release material is equal to or smaller than 25 mN/m.

Three-dimensional object fabrication method, fabrication apparatus, and fabrication system

A material set for manufacturing a glass object includes a powder material including glass and a first water soluble resin; and a liquid material including water and a second water soluble resin having a mass average molecular weight of less than 50,000.

Material set for manufacturing glass object, liquid material for manufacturing glass object, method of manufacturing glass object, glass object, and device for manufacturing glass object

A developing device, including: a developer containing toner and carrier; and developer bearer configured to have surface thereof bear the developer and endlessly move, and to develop latent image over surface of latent image bearer by supplying toner in developer to latent image in developing region facing the latent image bearer, wherein carrier contains fine particles, value X in volume resistivity R (=10) (&#x3a9;&#xb7;cm) of carrier is 11.5-16.0, developer bearer includes: magnetic field generating unit including a plurality of magnetic poles; and developing sleeve having a cylindrical shape enclosing magnetic field generating unit, and configured to bear developer over outer circumferential surface of cylindrical shape by magnetic force of the magnetic field generating unit and perform surface moving by rotating relative to developing device body, and developing device includes developing sleeve voltage applying unit configured to apply AC component-containing voltage to developing sleeve.

Developing device and image forming apparatus

Growing community of inventors

Shizuoka, Japan

Hitoshi Iwatsuki