Brother Kogyo Kabushiki-kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Kabushiki Toyota Chuo Kenkyusho

Hiroshi Kawahara

Shunichi Higashiyama

Takemi Yamamoto

Jun Sakai

Shigeyuki Hayashi

Osamu Takagi

Yumio Matsumoto

Takashi Saito

Kiyoharu Hayakawa

Yuji Asano

Kazuaki Nishino

Yoshihiro Shimizu

Hiroyuki Kawaura

Takao Nakazawa

Kenji Sakakibara

Michitoshi Akao

Ryohei Komiya

Ichiro Sasaki

Takashi Nakata

Kazuo Sangyoji

Takeshi Izaki

Mitsuru Ohta

Takashi Tomizawa

Minoru Uozumi

Tadahiko Furuta

Satoru Kuwabara

Keiko Suzuki

Kazuo Nakamura

Yoji Awano

Atushi Ota

Nobuhiko Matsumoto

Naohisa Nishino

Masanori Kobayashi

Hirokazu Oonishi

A magnesium alloy of the present invention includes magnesium as a main component, boron of 0.0005 weight % or more, manganese of 0.03 to 1 weight %, and substantially no zirconium or titanium. This magnesium alloy may further include aluminum of 1 to 30 weight % and/or zinc of 0.1 to 20 weight %. Because of appropriate amounts of boron and manganese contained in the magnesium alloy, the grain of the mangnesium alloy is refined.

Magnesium alloy and method of producing the same

The invention provides a method of producing an oxidation-resistant metallic part which exhibits oxidation resistance even in an oxidation atmosphere. The method includes the step of applying mechanical energy to a surface of a metallic part in the presence of particulates, and forming a protective coating in a surface of the metallic part. When the metallic part thus treated is exposed in a high temperature-oxidation atmosphere, the protective coating is oxidized to restrain the proceeding of the oxidation of the metallic part, that is the internally proceeding formation of TiO,, thus serving a remarkable improvement of the oxidation resistance.

Method of producing a metallic part exhibiting excellent oxidation resistance

Surface-treating metallic parts are produced by applying mechanical energy to the surface of a metallic part and to a substance on or near the surface of the metallic part. The substance is different from the metallic part in composition. The applying step forms a mechanically-alloyed layer from the metallic part and the substance in the surface of the metallic part. The surface-modified layer such as the mechanically-alloyed layer is a non-peeling alloyed layer having a composition or structure different from that of the metallic part. The method is effective in surface-treating light metal materials of which the surfaces are difficult to treat. For example, the method is applicable to soft Mg alloys and Al alloys to improve their surface hardness, and the thus-treated alloys are usable in slide parts which are required to have good wear resistance. It is also applicable to the improvement in the oxidation resistance of Ti alloy parts which are used at high temperatures, and to the improvement in the corrosion resistance of Mg alloys which are said to have poor corrosion resistance.

Surface-treated metallic part and processing method thereof

Disclosed are an aluminum alloy casting having a high strength and a high toughness, and a production process for the same. The aluminum alloy casting comprises silicon (Si) in an amount of 2.5 to 4.4% by weight, copper (Cu) in an amount of 1.5 to 2.5% by weight, magnesium (Mg) in an amount of 0.2 to 0.5% by weight and the balance of aluminum (Al), and a matrix thereof includes a dendrite which has a size of 30 micrometers or less. Since the Si addition amount is suppressed as less as possible and since the size of the dendrite is micro-fined in the aluminum alloy casting, the toughness is improved remarkably. Further, since the Cu and Mg are added in the predetermined addition amounts, the strength is enhanced in the aluminum alloy casting. In addition, a solution treatment which is employed in the production process can further enhance the strength of the aluminum alloy casting.

Aluminum alloy casting having high strength and high toughness and

A stamp device employs a heat sensitive stencil paper which includes a thermoplastic film and a porous carrier. The heat sensitive stencil paper is perforated by a thermal head according to characters, symbols, figures, etc. of an image input from an input mechanism. The display can be controlled to display a layout of the image to be perforated on the heat sensitive stencil paper. Therefore, a user can determine whether the layout is acceptable prior to perforating the stencil sheet. Consequently, the user can accurately print at a desired position on a recording medium by confirming the layout on the display prior to printing.

Electrical stamp device capable of displaying an image layout, and which

A light-and pressure-sensitive recording sheet and an original, overlapping each other, are introduced into an image forming apparatus, and are exposed to radiation on a transparent drum by means of a light source in the drum, whereupon a latent image, based on the contents of the original, is formed on the recording sheet. Then, the recording sheet is separated from the original by means of a separator, and is passed between a pair of pressure rolls. When the recording sheet is exposed, microcapsules thereon change their hardness. These microcapsules are ruptured selectively by pressure applied to the sheet. As a result, a chromogenic material, contained in the microcapsules, and a developer material, on the surface of a substrate of the recording sheet, react with each other, so that the sheet surface changes its color. Thus, the latent image is developed to accomplish copying in accordance with the original.

Image forming apparatus

In a pressure developing device employed in an imaging device like a duplicating machine, an optical printer etc., pressure force for evenly pressurizing a recording medium is capable of being varied in accordance with the width of the recording medium to be pressurized.

Pressure developing device

An image recording medium is provided with an identifying index indicative of whether or not one side of the image recording medium is a front side coated with developing agent. In another image recording medium coated with developing agent, electrical resistance material is coated on at least one side of the image recording medium. In a detecting device for the another image recording medium, an electrode unit is provided for measuring electric conductivity of one side of the image recording medium. A control unit is connected to the electrode unit for identifying the image recording medium on the basis of the electric conductivity measured by the electrode unit. In another detecting device, a light emitting unit emits light with which at least one of front and back sides of an image recording medium is illuminated. A light receiving unit receives light reflected from the at least one side of the image recording medium. An identifying unit is connected to the light receiving unit for identifying the front and back sides and presence and absence of the image recording medium on the basis of the light received by the light receiving unit.

Image recording medium and detecting device therefor

An exposure device used in an image forming apparatus for exposing a photosensitive recording medium carrying microcapsules on one surface thereof to color image lights produced in accordance with color image data representing an original image to form a latent image corresponding to the original image, includes a fiber optics tube (FOT) having an optical fiber array serving an exposing surface for producing the color image lights in accordance with the color image data and selectively exposing the photosensitive recording medium to the color image lights to form the latent image on the photosensitive recording medium, the exposing surface being disposed in such a manner as to confront the other surface of the photosensitive recording medium, a FOT driving circuit for driving the FOT, and a control unit for controlling the FOT driving circuit so that the color image lights are selectively produced in accordance with the image data inputted thereto and the color image lights thus produced are irradiated to the photosensitive recording medium.

Image exposure device for exposing photosensitive recording medium to

In a pressure developing device employed in an imaging device like a duplicating machine, an optical printer etc, pressure force for pressurizing a recording medium is capable of being varied in accordance with the width of the recording medium to be pressurized. A sensor for detecting the width of the recording medium is provided, and the pressure force is varied based upon the detected value.

Disclosed is a pressure developing apparatus for pressing a microcapsule sheet carrying photo-sensitive microcapsules applied thereon and having a latent image formed thereon, together with a developer sheet carrying a developer applied thereon, the apparatus comprising a pair of pressure members for pressing the microcapsule and developer sheets therebetween, at least one of the pair of pressure members having a pressing width for pressing the microcapsule sheet together with the developer sheet, the pressing width being selected to be narrower than that of each of the microcapsule sheet and the developer sheet.

Pressure developing apparatus

Copying apparatus is constituted by a photosensitive member having a photochromic characteristic when changes light transmitibility when projected with light reflected by a manuscript. A light source is provided for projecting a photo-image formed on the photosensitive member onto a photosensitive recording sheet through the photosensitive member. In a modified embodiment, the copying apparatus has a construction substantially the same as the conventional electrophotographic copying machine except that a photosensitive drum is made of transparent material and covered by a thin transparent photoconductor. Consequently a toner image corresponding to the photo-image of a manuscript is formed on the photosensitive drum. A light source is provided for projecting the toner image on a photosensitive recording sheet.

Copying apparatus

A printing apparatus having a daisy-shaped type wheel which is equipped with a multiplicity of radially disposed type element holders each carrying at its outer end a type element. A printing head comprising the type wheel, an electric drive motor coupled to the type wheel, a print hammer and a ribbon cartridge, is pivoted, with a simple manipulation of a manual lever, from its lower, normal operating position to its upper non-operating, about 45.degree.-from-horizontal position at which the type wheel is mountable on, or removable from, the end of a rotor shaft of the motor in an axial direction thereof, without interference with a platen, and with the ribbon which is put out of the mounting and removing path of the type wheel when a platform on which the cartridge is mounted is pivoted to its upper position together with, and by larger amount than, the printing head due to the manipulation of the manual lever. A difference in angle of pivoting movement between the printing head and the platform causes a pair of ribbon holders to move upward carrying an active portion of the ribbon supported therebetween to the upper position at which the ribbon is clear of the type wheel to be removed or mounted.

Type wheel changing mechanism in a printer

A printing hammer drive mechanism for a printing apparatus, comprising a manual control member movably attached to a main frame, an electromagnet mounted on the main frame for movement relative to the armature thereof, linking means disposed between the control member and the electromagnet for changing the gap between the core and the armature of the electromagnet in accordance with the operation of the control member, and a member for transmitting movement of the armature from a rest position to a work position, to a printing hammer, wherein the impact force of the hammer can be suitably changed by operating the control member to change the gap between the core and the armature of the electromagnet.

Growing community of inventors

Aichi, Japan

Hiroshi Kawahara