Canon Kabushiki Kaisha

Koji Kitani

Kenichi Kataoka

Hiroyuki Seki

Yutaka Maruyama

Masahiko Igaki

Yoshifumi Nishimoto

Makoto Kameyama

Eiichi Yanagi

Tsutomu Miki

Hidehiko Fujimura

Toru Nakanishi

Hideo Iwase

Tomoyasu Mizuno

Shumpei Tatsumi

Naruto Sugimoto

Koh Kamachi

Tohru Nakanishi

Naoki Takizawa

Yoichi Hoshi

An additive manufacturing apparatus includes a powder-layer forming portion, an energy beam source, a shielding portion, and/or a removal portion. The powder-layer forming portion is configured to form a powder layer by moving between a waiting position and a forming area and supplying powder to the forming area. The energy beam source is configured to irradiate the powder layer with an energy beam. The shielding portion is disposed outside the forming area and between the forming area and the waiting position and configured to reduce powder reaching the powder-layer forming portion, the powder being scattered from the powder layer when the powder layer is irradiated with the energy beam by the energy beam source. The removal portion is configured to remove the powder scattered from the powder layer and having adhered to the powder-layer forming portion.

Additive manufacturing apparatus and method of manufacturing three-dimensionally shaped object

An additive manufacturing apparatus includes a powder layer forming portion, an energy beam source, and a contact detection sensor including a plate-like probe. The powder layer forming portion is configured to form a powder layer in a predetermined region. The energy beam source is configured to radiate an energy beam to the powder layer formed by the powder layer forming portion to fuse or sinter the powder layer so that a solidified layer is formed. Presence or absence of a projection portion on a surface of the solidified layer is detected by using the contact detection sensor.

Additive manufacturing apparatus and method for manufacturing three-dimensionally shaped object

Three-dimensional manufacturing method and apparatus which easily adjust individually a heating amount per unit area for each of solidified and unsolidified regions is provided. Light source and scanning unit heat with a laser beam a layer formed by a layer forming unit. In a layer forming step, a controlling unit causes the layer forming unit to form a layer of material powder. In a laser heating step, the controlling unit controls the light source and the scanning unit to alternately heat with the laser beam the solidified region obtained by fusing and solidifying the layer and the unsolidified region adjacent to the solidified region, thereby integrally fusing and solidifying the solidified region and the unsolidified region.

Three-dimensional manufacturing method and three-dimensional manufacturing apparatus

A method for treating a raw-material powder includes forming a layer of the raw-material powder and removing oxide film formed on a surface of the raw-material powder from which the layer has been formed.

Apparatus for treating raw-material powder, apparatus for treating raw-material powder, and method for producing object

A liquid ejection device includes a piezoelectric transducer having a plurality of pressure chambers, a plurality of partitions dividing the plurality of pressure chambers, and a plurality of electrodes formed in the plurality of pressure chambers, respectively. The plurality of partitions each includes a first side wall and a second side wall that is positioned on a back surface side of the first side wall. The first side wall includes a first wall surface positioned at an upper portion thereof, the first wall surface being positioned so as to be set back in a normal direction from a second wall surface positioned below the first wall surface. A first electrode is formed on the second wall surface, and a second electrode is formed on the second side wall. An upper end of the second electrode is higher than an upper end of the first electrode.

Piezoelectric liquid ejection device with electrodes formed on partition wall surfaces

A liquid discharge head includes a substrate, on which are formed energy generating members for generating energy to be used for the discharge of a liquid through a discharge port, and a precious metal protective layer for protecting the energy generating members, an inorganic adhesive layer formed of at least one material selected from titanium, titanium nitride, tantalum nitride and chromium nitride, the inorganic adhesive layer being closely adhered to the precious metal protective layer, an organic adhesive layer made of an organic material, and a flow path formation member, serving as a wall of a flow path communicating with the discharge port. The substrate, the inorganic adhesive layer, the adhesive layer and the flow path formation member are bonded to the substrate in this order.

Liquid discharge head and manufacturing method therefor

In order to suppress peeling of a film formed on a base, and improve the durability and reliability of the film, an overhang is provided on a side surface of a sacrifice layer, whereby a film is formed, which has an edge portion having a thickness distribution, in which a thickness is gradually decreased to substantially zero at an edge of a formed film.

Liquid discharge head

A method for making a piezoelectric element including a piezoelectric film formed on a substrate by a gas deposition technique includes the steps of ejecting ultra-fine particles of a piezoelectric material having a perovskite structure from an ejecting device toward the substrate, and applying an electric field to the ultra-fine particles traveling to the substrate. The substrate may be composed of a metal or a resin.

Method for making piezoelectric element

In a thin-film formation process and system, a target and a substrate are placed in a sputtering space and a film-forming space, respectively, the pressure in the film-forming space is maintained at a pressure lower than the pressure in the sputtering space and a pressure sufficient for sputtered particles to move in the film-forming space with their mean free path which is longer than the distance between the grid plate and the substrate, and the target is sputtered to form a thin film on the substrate.

Thin-film formation system and thin-film formation process

Friction member used in vibration wave driving apparatus, and device using the vibration wave driving apparatus as driving source

A control apparatus for driving a vibration wave motor, in which localized fixation between a vibration member and a contact member in contact with the vibration member is peeled off by shifting the frequency of an applied frequency signal from a frequency higher than the resonant frequency to a lower frequency.

Control apparatus for vibration wave motor

A long-life vibration wave motor which abrades little and can be driven for long time periods. causes a vibration member to form a vibration wave and thereby moves the vibration member and a contact member in tight contact with the vibration member relative to each other by a frictional force. The vibration wave motor includes a sliding material made from hard particles and a soft metal softer than the hard particles and having a sliding surface obtained by projecting the hard particles by 0.2 to 2 .mu.m from the surface of the soft metal used in one of two contact portions of the vibration member and the contact member.

Vibration wave driving device

A vibration driven motor of a construction in which the hardness of the sliding surface of a vibration member is lower than the hardness of the sliding contact portion of a member brought into pressure contact therewith, and the lateral width of the sliding contact portion of the vibration member is smaller than the width of the sliding contact portion of the member brought into pressure contact therewith, whereby the sliding member of the vibration member is caused to wear more than the sliding member of the member brought into pressure contact therewith, thereby to facilitate the discharge of the wear powder thereof and to eliminate the level difference wear of the movable member attributable to the comb-shaped projections and the deterioration of the planarity of the movable member similar thereto. Also, this structure prevents deterioration of accuracy in motor performance when a stopping or starting operation occurs at the same location, or when operating at extremely low speed control is effected, and abnormal wear of the sliding surface of the vibration member is prevented.

Vibration driven motor

As a combination of sliding members of a vibration member and a driven member in a vibration driven motor or actuator, one member adopts an aluminum alloy containing dispersed Si (silicon), and the other member adopts a PTFE resin filled with polyimide.

Vibration driven actuator

Disclosed is feeding apparatus comprising a first vibration apparatus having projections provided with a predetermined distance therebetween, the first vibration apparatus producing a first travelling vibration wave in response to an electrical signal applied thereto, and a second vibration apparatus having projections located at the positions substantially corresponding to the projections of the first vibration apparatus, the second vibration apparatus producing a second travelling vibration wave proceeding in the same direction as the first travelling vibration wave in response to an electrical signal supplied thereto thereby the sheet inserted between the projections of the first vibration apparatus and the projections of the second vibration apparatus being fed by the first and second travelling vibration waves.

Growing community of inventors

Chofu, Japan

Koji Kitani