Ricoh Company, Ltd.

Nippon Hoso' Kyokai

Chotaro Engineering, Co.

Yasutomo Aman

Nobuaki Onagi

Shozo Murata

Yoshimichi Takano

Haruki Tokumaru

Daiichi Koide

Hitoshi Iwatsuki

Akira Saito

Yasuyuki Yamashita

Kiichi Kamoda

Masami Nishida

Mitsuru Naruse

Hiroshi Miura

Hiroshi Deguchi

Masaru Shinkai

Hajime Yuzurihara

Hiroko Ohkura

Masahiro Masuzawa

Katsunari Hanaoka

Hiroko Tashiro

Sohichiroh Iida

Toshiyuki Iseki

Wataru Ohtani

Yohei Shiren

Yoshifumi Ohba

Keisuke Uchida

Kazunori Ito

Minoru Takahashi

Shinzo Higuchi

Toshiyuki Mutoh

Kiyoto Shibata

Yasunori Sugimoto

Takeshi Kajiyama

Tomoki Kai

Koide Daiichi

Kajiyama Takeshi

Nishida Masami

Takano Yoshimichi

A layer forming apparatus includes a loading unit including a stage onto which powder is supplied, a rotator that flattens the powder on the stage to form a powder layer, and circuitry. The circuitry causes the rotator to move in a first direction parallel to a surface of the stage and rotate while contacting the powder on the stage to form the powder layer. Further, the circuitry causes the rotator to move in a second direction opposite to the first direction and rotate while contacting surplus powder not on the stage.

Layer forming apparatus, method of forming powder layer, and recording medium

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 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 reaction material formed body into which a reaction material reacting with a reaction medium to store or release heat is formed includes first and second opposite surfaces and multiple heat transfer enhancing members extending at least from the first surface to the second surface. At least two or more of the heat transfer enhancing members are oriented in a predetermined single direction.

Reaction material formed body and heat storage and release unit

A reaction material for a chemical heat pump includes type III anhydrous gypsum, a magnesium compound, and CaMgSO. The reaction material for the chemical heat pump structurally changes between a compound including type III anhydrous gypsum, the magnesium compound, and CaMgSO, and a compound including hemihydrate gypsum, a hydrate of the magnesium compound, and a hydrate of CaMgSOwhen subjected to heat storage process and heat release process. x is 0&#x3c;x&#x3c;1.

Reaction material and chemical heat pump

A disclosed disk clamping mechanism includes a turntable fixed on a rotational shaft of a spindle motor to rotate a flexible thin optical disk, a stabilizer member configured to suppress a run-out of the flexible thin optical disk by an applying aerodynamic force to the rotating flexible thin optical disk so as to stabilize the run-out of the rotating flexible thin optical disk, and a clamper movably supported in a center of the stabilizer member in a direction perpendicular to a surface of the flexible thin optical disk. In the disclosed disk clamping mechanism, the flexible thin optical disk is sandwiched between the turntable and the clamper such that the turntable and the clamper rotate the flexible thin optical member sandwiched in-between.

Disk clamping mechanism and disk drive system, with movably supported clamper

A disk rotating device includes a flexible disk in which information is recordable, a turntable on which the disk is held, a spindle that rotates the disk held on the turntable, and a stabilizer that stabilizes the rotating disk. In the disk rotating device, a rotation transmitting device transmits the rotation of the spindle to the disk via the turntable, and a disk holding device holds the disk so that the disk is elastically deformable from a center of the rotation of the disk in a radial direction of the disk.

Disk rotating device, disk, disk assembly, disk cartridge, and recording and reproducing device

A data recording/reproduction method for performing a data recording/reproduction process on a flexible optical disk by rotating the flexible optical disk while controlling an axial runout of the flexible optical disk with a stabilizing member that applies an aerodynamic force to the flexible optical disk, and irradiating an optical beam and focusing the optical beam to the flexible optical disk is disclosed that includes the steps of a) generating a first axial runout, b) generating a focus error signal forming an S-curve when the first axial runout is generated, c) determining a position of the optical beam according to the focus error signal, d) generating a second axial runout that is smaller than the first axial runout after step c), and e) conducting at least one of the data recording process and the data reproduction process after step d).

Data recording/reproduction method and data recording/reproduction apparatus

A recording/reproducing apparatus is disclosed that includes a spindle motor unit including a spindle on which a flexible recording disk is placed, a stabilizer plate disposed so as to face the recording disk, a torque detection unit configured to detect a drive torque applied to the spindle motor unit, an adjustment unit configured to adjust a gap between the recording disk and the stabilizer plate, and a determination unit configured to determine an optimal gap to be set to the gap based on the drive torque detected by the torque detection unit, in which the adjustment unit sets the optimum gap determined by the determination unit to the gap.

Optimum gap determined recording/reproducing apparatus

An optical disk apparatus includes a rotary driving unit rotating an optical disk which is flexible, an optical pickup irradiating light upon a recording surface of the optical disk on which writing/reading of information is performed, a stabilizing unit stabilizing vibration of the optical disk in a rotary axial direction by using pressure difference of air flow at least on a portion where writing/reading is performed, and being disposed on a side of the optical disk opposite to a side on which the recording surface is provided, and a control-adjustment unit analyzing a value of a tracking error signal of the optical disk obtained by scanning along a groove of the optical disk with use of the optical pickup, comparing the analyzed value of the tracking error signal of the optical disk and a value priorly obtained by scanning along a groove of a standard disk prepared beforehand, and adjusting a positional relation between the optical disk and the stabilizing member in a three dimensional space according to the result of the comparison.

Optical disk apparatus and method of controlling optical disk apparatus

Optimum gap determined recording/reproducing apparatus and method

A stabilization part stabilizes surface vibration of a flexible optical disk along a rotation axis direction of the optical disk by means of pressure difference of air flow created according to Bernoulli's law at a portion on which information writing/reading is performed, provided on a side of the optical disk opposite to a side on which information recording/reproducing is performed. In this case, areas are provide on the upstream side and down stream side along the disk rotation direction of the portion of the optical disk which is stabilized by said stabilization part, said areas of the optical disk not having pressure difference created thereon by the air flow.

Disk drive system employing effective disk surface stabilization mechanism

A disk apparatus includes a head configured to move along a recording surface of a rotating disk; and a stabilizing member provided so as to face the disk. A facing surface of the stabilizing member facing the disk includes a curved surface whose symmetrical axis is a center generating line passing through a center of the facing surface. The head reciprocally moves along a path which is offset from the center generating line.

Disk apparatus with curved stabilizing member

A flexible optical disk, includes a disk substrate, wherein a rigidity of the disk is equal to or more than 5 Pa and equal to or less than 5000 Pa where the rigidity is defined as Young's modulus of the disk&#xd7;(thickness of the disk/radius of the disk).

Manufacturing method of a flexible optical disk

Growing community of inventors

Kanagawa, Japan

Yasutomo Aman