Abstract: Disclosed is a hanger hook adapted to be attached to a headrest of an automobile seat, which comprises an upper edge portion, a plate-shaped body portion and a lower edge portion. The upper edge portion has width-directional opposite ends each formed as a cylindrical-shaped slip-resistant region which includes a slip-resistant rubber member fitted around an outer peripheral surface thereof. The body portion extends from the upper edge portion toward the lower edge portion in such a manner as to have an even thickness and a gradually narrowed width and form a circular arc shape, and the lower edge portion is formed to have a C-shaped hook configuration.

Abstract: A stationary board adapted to be set up in a medial strip between traffic lanes to block lights of oncoming vehicles in the medial strip and facilitate identification of the medial strip in nighttime driving or riding. This stationary board comprises a pair of plate members each composed of a molded component made of a transparent plastic material, and the plate members are coupled with one another at the respective marginal edges thereof to form an integrated assembly having a hollow space therein. Each of the plate members is formed with irregularities in its inner surface facing the hollow space of the assembly. A top member molded of a plastic material is attached to the top portion of the assembly in a fitting manner. The plastic material of the top member contains a luminous pigment capable of absorbing, storing and emitting light.

Abstract: A method of manufacturing a diffusion plate for use in a screen plate of projection TV is disclosed. The diffusion plate having a plurality of quadrangular pyramid protrusions almost over one side thereof is manufactured by means of injection molding process of plastic material. This method uses a first molding die having a first molding die surface, a pre-molding die capable of forming a first volume of molding cavity in matching with the first molding die, and a second molding die capable of forming a second volume of molding cavity smaller than the first volume in matching with the first molding die.

Abstract: Disclosed is a stationary board adapted to be set up in a medial strip between traffic lanes to block lights of oncoming vehicles in the medial strip and facilitate identification of the medial strip in nighttime driving or riding. This stationary board comprises a pair of plate members each composed of a molded component made of a transparent plastic material, and the plate members are coupled with one another at the respective marginal edges thereof to form an integrated assembly having a hollow space therein. Each of the plate members is formed with irregularities in its inner surface facing the hollow space of the assembly. A top member molded of a plastic material is attached to the top portion of the assembly in a fitting manner. The plastic material of the top member contains a luminous pigment capable of absorbing, storing and emitting light.

Abstract: A method for producing an article made of plastics by an injection molding process is described. A movable die of a plastic-material injection molding die assembly is heated at a temperature of 50 to 70° C., or 60 to 95° C., and placed at a coating station to apply a liquid acrylic lacquer coating or urethane-based or epoxy-based coating on a molding surface of the movable die. Then, the movable die is moved into a drying chamber maintained at a temperature of 50 to 60° C., or 80 to 90° C., and placed in the drying chamber for 30 to 90 seconds, or 6 to 30 seconds, to semi-dry the coating applied on the molding surface. Subsequently, the movable die is connected to a fixed die of the die assembly to form a molding cavity. Then, a molten plastics material is injected into the molding cavity to produce an injection-molded plastics material product having a coated film of the coating.

Abstract: A method for manufacturing an ornamental exterior panel having a lustrous appearance. The method including the steps of forming a part having front and rear faces with a transparent resin material, applying an adhesive on the rear face of the part, dispersedly applying colored or lustrous fine particles onto the adhesive, and coating with a selected color tone of paint over the resulting rear face of the part.

Abstract: A combination of beverage can cap and straw, including a beverage can cap including a top plate portion and a peripheral rim portion which is to be fitted into a can edge of a beverage can. The beverage can cap being formed with a straw-inserting aperture at a position corresponding to a drinking aperture which is to be opened in a top cover of the beverage can. The beverage can cap being formed with a straw retaining portion on the outer surface of the peripheral rim portion as rising outward in a direction orthogonal to the surface of the top plate portion. The straw retaining portion having a fitting slot capable of retaining a straw fitted thereinto. A straw having a diameter capable of being fitted into the fitting slot formed in the straw-retaining portion. The straw being formed with a bendable accordion-like portion.

Abstract: A writing board with an electronic calculator and a writing board to which an electronic calculator is installable. The writing board including a case member provided with an opening in a top surface of the case member, and a frame section surrounding the opening is formed on the top surface of the case member. A recording sheet including a microcapsule magnetic sheet is disposed in the case member with a top face of the recording sheet exposed through the opening of the case member. A magnetic member is used for writing on the recording sheet. The writing board further includes a magnetized erasing sheet which is positioned under the recording sheet in parallel with the recording sheet. An erasing button is used in the case member so that writings on the recording sheet can be erased only by depressing the erasing button. An electronic calculator is or can be mounted on the top surface of the case member.

Abstract: A straw comprises a cylindrical plug member having an opening at a top thereof, and a straw member which vertically extends through a bottom portion of the plug member and which is retractable in the longitudinal direction of the straw member, wherein the straw is adapted to fit the plug member with a top of a mouth of a beverage container so as to retain in a state where the straw is inserted into the beverage container. The straw is also adapted to allow a top of the straw member to be protruded from the mouth of the beverage container by extending the straw member and to allow the top of the straw member to be contained within the plug member by retracting the straw member so as to attach a cap of the beverage container.

Abstract: In a magnetically writable and erasable writing device for practice in writing characters, the writing device includes a case member provided with an opening in a top surface of the case member wherein a frame section surrounding the opening is formed on the top surface of the case member. A writing sheet includes a microcapsule magnetic sheet and is disposed on the case member so as to expose a top face of the writing sheet from the opening of the case member. A magnetic member for writing on the writing sheet and an erasing member which is positioned under the writing sheet and which has magnetism is included in the case member. The magnetic member put on the top face of the writing sheet enables writing and moving the erasing member along a back face of the writing sheet enables the written contents to be erased. The frame section of the top surface of the case member indicates a character model.

Abstract: A straw including a straw member having an outer straw portion and an inner straw portion, the outer and inner straw portions being telescopingly fitted with each other, the inner straw portion including an elastic upper section, and a cylindrical plug member having an opening at the upper end thereof. The inner straw portion is retained in the state inserted into a beverage container by mounting the plug member to the upper end of a mouth of the beverage container, and the upper section of the inner straw portion is bent by pressing with a beverage container cap so as to attach the beverage container cap to the beverage container, and the upper end of the inner straw portion is protruded from the upper end of the plug member by detaching the beverage container cap.

Abstract: A table or base for a telephone or the like includes an outer case, a recording sheet which is retractable within the outer case and which includes a microcapsule magnetic sheet, and an erasing magnetic member disposed within the outer case. The outer case has a top surface on which the telephone and other articles can be placed. The erasing magnetic member is positioned under the recording sheet when the inner case is pushed into the outer case. Thus, pulling out the recording sheet from the outer case enables a top face of the recording sheet to be magnetically written in, and pushing the recording sheet into the outer case enables the magnetic writing on the recording sheet to be erased.

Abstract: A spike structure consists of a spike body made of a plastic material, and a self-tapping screw 3 made of a metal. The spike body 2 is comprised of a flange-shaped portion 4 and a threaded stud which has a thread on the outer surface thereof and extends from one surface of said flange-shaped portion 4. An axial bore is formed through the flange-shaped portion 4 and the threaded stud 5, while slits are formed in said threaded stud 5, extending to the free end of said threaded stud. A self-tapping screw 3 is inserted with tapping into the axial bore to be fixed to said spike body. Said self-tapping screw 3 is configurated to stretch said threaded stud radially outwardly when inserted into the axial bore of spike body.

Abstract: There is disclosed a Fresnel lens, adapted to be placed in front of a display screen of a computer or a television set in order to magnify images for observation, which does not cause a rainbow-like pattern to appear even when annular prism elements as the constituent elements of said Fresnel lens are arranged at a fine pitch. A spherical surface having a radius of curvature corresponding to the focal distance of the lens formed by said annular prism elements of said Fresnel lens is formed within a circular area defined by a predetermined radius around the optical axis, where the rainbow-like pattern would otherwise appear due to diffraction. The predetermined pitch in arranging a plurality of annular prism elements of the Fresnel lens is equal to or less than 0.25 mm and the height of the annular prism elements in the circular area is equal to or less than 5 &mgr;m and preferably equal to or less than 7 &mgr;m.

Abstract: A magnetic head drum for a magnetic recording apparatus comprising a metallic ring of a predetermined thickness, and a support body of a plastic material formed in said metallic ring through an outsert forming process. The support body of the plastic material includes a peripheral ring-shaped portion, a central boss portion for receiving a rotating shaft and a web portion connecting the ring-shaped portion with the boss portion. A plurality of magnetic heads are provided on a periphery of the drum to rotate as a unit with the metallic ring. There is also disclosed a method for manufacturing the magnetic head drum through an injection molding process of a plastic material using a metallic ring of a predetermined thickness.

Abstract: A process for coating a front surface of a cathode ray, the process being characterized by using a ultraviolet ray setting plastic material as a coating material. According to the process, a preformed cathode ray tube bulb having a front surface is maintained with the front surface directed upwards and a transparent, fluidized or molten plastic material of ultraviolet setting property is discharged to the front surface of the bulb through a plurality of thin nozzles arranged in at least one row or one or more nozzles each having an elongated nozzle opening. In this instance, it is preferable that the molten plastic material discharged from the nozzles is received by a film forming surface which is arranged adjacent to the nozzles to form a thin plastic film before it reaches the front surface of the bulb. Preferably, the film forming surface is provided by a sheet of a material, such as a silicon rubber, which is not wettable to the plastic material.

Abstract: An injection mold for forming a thick-walled front cabinet which has a front frame panel and a cabinet portion integral with each other and which is used for an image display device containing a cathode ray tube therein. The mold has a cavity having a large depth corresponding to the large wall thickness of said cabinet, the depth of said cavity being reduced at at least a portion for forming an edge of said front frame panel contactable with said cathode ray tube, a sprue, a single runner communicating with said sprue, and a single film-type tunnel gate communicating with said runner and communicating with a portion of said cavity for forming an upper portion of said cabinet. First molten synthetic resin is first injected by a first cylinder of a sandwich injection molding machine through said tunnel gate into a portion of said cavity including said reduced depth portion.

Abstract: A driving device of a tape recorder in which a sliding plate supporting a magnetic head and a pinch roller is arranged for movement relative to a base and the sliding plate is adapted to be driven to an operating position where the pinch roller comes into a cooperating condition with a capstan at a record-play operation. The driving device includes a cam to drive the sliding plate and such cam, at an initial period of the record-play operation, is driven by a predetermined angle in a predetermined direction to engage the sliding plate, thereby causing the sliding plate to move to the operating position. The driving device is provided with a driven gear continuously driven by a motor and a partially toothed gear which frictionally engages the driven gear to thereby drive the cam.

Abstract: A method of manufacturing a cabinet for use with a display, the cabinet having a sandwiched structure at portions requiring extra strength such as the picture tube or display screen setting portion, the sandwiched structure including a flat outer surface including a resin and a core including a fiber-reinforced resin mixture. Other portions of the cabinet can be formed relatively thin-walled.