Abstract: 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.

Abstract: A magnetic disk apparatus includes a magnetic disk medium and a magnetic head. The magnetic disk medium has a surface layer formed with an SiO.sub.2 protective film. The magnetic head reads/writes data from/on the magnetic disk medium by contact, start, and stop operations. The magnetic head has a slider having an air bearing surface, a magnetic head element supported by the slider, and an ABS protective film formed on the air bearing surface of the slider.

Abstract: An overcoat for sufficiently preventing mechanical wear of a magnetic head slider caused by contact with a magnetic record medium is provided in a thin film head of a magnetic disk device.The magnetic head slider is provided with the overcoat constituted by a film including two layers of a silicon layer that is an adhesive layer and a diamond-like carbon layer that is a protective layer and the silicon layer includes nitrogen component. Further, nitrogen concentration of the silicon layer 2 ranges from 1 through 57%.The thickness of the silicon layer ranges from 5 through 300 angstroms and the thickness of the carbon layer ranges from 10 through 500 angstroms.

Abstract: A magnetic recording medium records two or more signals having different frequency bands by frequency multiplex recording. The non-magnetic substrate includes a first magnetic layer and a second magnetic layer on that order, said second magnetic layer having a thickness amounting to 70% or less of the shortest recording wavelength of the signals to be recorded.

Abstract: 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.

Abstract: 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.

Abstract: The present invention provides a waterproof recording material having ground patterns characterized in that the ground patterns are imparted to the surface of a film of a resin composition comprising a thermoplastic synthetic resin and a filler. According to this invention, it is possible to provide a fine-looking recording material which, besides excellent waterproofness and recording property, may have various stages of surface properties and visual effects imparted by means of the ground patterns. The waterproof recording material having ground patterns of the present invention is suitable as a material of valuable securities and the like, facilitating true/false discrimination and preventing illegal use or abuse thereof by altering, falsification et cetera.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A magnetic recording medium is used with a magnetic recording system in which a baseband recording signal is recorded on a magnetic recording medium and a surface-band recording signal with the effective recording depth being smaller than that of the baseband recording signal is then recorded thereon in superimposed relation. The non-magnetic substrate includes thereon a first magnetic layer and a second magnetic layer on that order, said second magnetic layer having a thickness substantially equal to the effective recording depth of said surface-band recording signal and a coercivity higher than that of said first magnetic layer.

Abstract: 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

Abstract: A system for detecting the speed of an engine for a vehicle calculates the engine speed in accordance with a signal which is outputted from a main rotation sensor in accordance with the operation of the engine. In case the main rotation sensor is subjected to malfunction, the engine speed is calculated using a back-up signal. Namely, an auxiliary rotation sensor detects the rotation of a portion of a power transmission device. When the above portion of the power transmission device is connected to an output shaft of the engine, the signal from the auxiliary rotation sensor is used as the back-up signal. When the two are disconnected from each other, a signal, representing the condition of the operation of an actuator for controlling the amount of supply of fuel to the engine, is used as the back-up signal.

Abstract: 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.

Abstract: The present invention provides a laminated material for cups good for both hot and cold drinks comprising a base material and a resin layer laminated thereon, wherein the melting point of the aforementioned resin layer is not less than 95.degree. C. when measured by DSC, the difference .DELTA..theta. between the advancing contact angle (.theta.a) and the receding contact angle (.theta.r) for water is not more than 20.degree., and the resin layer has a heat sealability. According to the present invention, a laminated material for cups good for both hot and cold drinks can be provided, these cups being also excellent in bubble-arresting property and sliding property as well as vending property.

Abstract: 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.

Abstract: The present invention provides a developer sheet composed of a sheet-like molded form of a mixture of a developer and a dye-adsorbing inorganic substance and a substrate integrated by adhesion. According to the present invention, there is provided a developer sheet improved in color coupling performance, outstanding in stability (to water, heat, light, plasticizer etc.) and manufacturable with a high efficiency.

Abstract: 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.

Abstract: 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.

Abstract: 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.