Abstract: In a process for producing plastics sheet or film having a face which conforms to a face of a master, e.g. a ground glass surface, comminuted plastics material is placed in a layer on the master and a parting sheet is placed over the plastics material. Force is applied evenly over all of the area of the plastics layer, e.g. as by fluid pressure through a diaphragm, and the plastics material is heated to its fusion temperature such that the plastics materials flows into a coherent sheet or film. Relatively low fluid pressures, e.g. atmospheric and less, may be used. In a further step, the flat face of plastics sheet or film formed in this way is metallized and then covered with an abrasion resistant transparent coating, to result in a high quality mirror. In a preferred process, the transparent coating is cured rapidly by application of radiant heat.

Abstract: A consolidated man-made board, such as hardboard, is wetted on one surface and thereafter embossed with a contoured embossing plate at a pressure of at least about 1000 p.s.i., at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently re-shape the surface of the consolidated board.

Abstract: A process of making heat and dimensionally stable, consolidated, laminated, asbestos cored, textured unitary structures for use in making textured decorative laminates, and said structures per se, are disclosed.

Abstract: A method for producing skis or other articles having curvature, wherein a mold of resilient material is used. The mold has a cavity of a shape substantially conforming to the plan contour of the ski, but the upper and lower surfaces of the cavity are made simply flat without being given a camber. The members constituting a ski are placed in the cavity with adhesive films interposed therebetween. Then the resilient mold is closed and thereafter is placed on a rigid base mold having a surface conforming in shape to the camber of the ski. The resilient mold having the ski members therein is pressed to the curved surface of the base mold while being heated, whereby the ski members are easily given a permanent camber or curvature required for a completed ski.

Abstract: A method and apparatus is disclosed for bonding of dielectric circuit boa for microwave use, the bonding together of several circuit boards to form subassemblies and the bonding of subassemblies together. The finished circuit may include a bonded-in ground plate of copper wire cloth or the like and may include through-plate holes. The technique includes the build-up of thin films to provide strength, toughness and dimensional accuracy. Orthogonal positioning of directional stresses and cooling under pressure have a stabilizing effect. The bonding of copper or other conductive sheet or foil to the substrate is done without the use of a copper oxide or other coating and using only heat and pressure. An etched circuit in the copper sheet or foil, for example, is made flush with the finished surface of the board in the process.

Abstract: A process for joining objects, such as wooden boards, by means of a cement adapted to be hardened in an electric high-frequency field between a pair of electrodes, wherein the section of the objects situated between the electrodes is sealed off by means of a suitable layer of resilient material pressed against the surfaces of the objects to prevent steam and ionized gases from escaping from the objects to the surrounding space, thereby permitting a substantial increase of the electric energy applied without risk of spark discharge between the electrodes. The invention also provides a device for performing this process, comprising a pair of electrodes provided with a layer of such resilient material.

Abstract: A method of manufacturing a bag from a cylindrical net-like bag blank made of synthetic fibers or synthetic resin. The method involves the steps of inserting into said bag blank a resilient plate having a length which is at least equal to the depth of the bag to be manufactured and a width which is substantially equal to the circumferential length of said bag blank in such a way that the plate is not overlapped with the bag bottom forming portion of the bag blank but is overlapped with the bag mouth forming portion of the bag blank.

Abstract: There is described a device comprising, in combination with a wheel supported structure adapted to be moved on the road surface, an assembly having vertically elongated compartments for storage of long pot-life viscous components adapted to co-react when mixed together and to form promptly hardenable compounds adapted to form a layer on said road surface, to provide a sign thereon or to form a primer base for laying down and adhesively securing a tape thereto. The assembly also includes means for supporting and laying said tape on the freshly formed layer, as well as pneumatically operated motor and control means for controlling the movements and the sequence of operations of the device.

Abstract: A plastic film sealer has a thermostatically controlled heated bar which can move inwardly and outwardly through an opening in the sealer housing. A high temperature plastic film is attached across the opening and interposed between the heated bar and the layers of heat sealable plastic film being heat sealed. The movement of the heated bar and of the high temperature plastic film is limited substantially to perpendicular movement relative to the plane of the heat sealable plastic film layers.

Abstract: A glazing including a sheet of glass and a sheet of plastic adhesively fastened thereto is manufactured by assembling into a stack the sheet of glass, the sheet of plastic, a thin flexible protective sheet, and a thick cushion sheet. The stack is enclosed in a bag of rubber or similar flexible material which is evacuated to degas the stack.. The bag with the stack therein is then subjected to heat and pressure in an autoclave to bond together the glass and plastic sheets, whereafter the protective and cushion sheets can be readily separated from the remainder of the stack.

Abstract: A method for manufacturing a metal foil- or plastic film-overlaid laminate which comprises completely covering a cleaned press plate with a cleaned metal foil, a cleaned plastic film or both of them in such a manner that the pressing surface of the press plate comes in intimate contact with the face side of said metal foil or plastic film, partially or completely sealing the resulting covering along at least two edges of the press plate, two of the edges being opposite to each other, applying the covered press plate to one or both sides of a laminating base, subjecting the resulting assembly to a laminating apparatus with heating under pressure, taking the assembly out of the laminating apparatus, and thereafter opening the covering to remove the press plate.