Abstract: An anti-slip tray and the method of manufacturing it. Sheets of paper impregnated with melamine resin and paper sheets impregnated with phenolic resin are stacked in a pile. A loosely woven cloth covers the pile. Its upper face or major surface is covered with a layer of porous PVC which can be decorative. The cloth has a plurality of perforations. The cloth and pile are molded under heat and pressure.

Abstract: A coated paperboard product and a process for producing the same which includes corona discharge treatment of a paperboard surface and subsequent extrusion of molten polyester thereon. The resulting product has a very high degree of adhesion between the paperboard and polyester layers, and is capable of being utilized for forming pressed food trays which can be subjected to oven cooking temperatures.

Abstract: A process for the manufacture of an article such as a tray made of laminated plastics having a non-slippery surface comprises the steps of forming on a temporary flexible support a vulcanizable coating comprising a mixture of 100 parts of crude polyethylene chlorosulphonate rubber with a 3-50 parts by weight of heat-hardenable melamine resin, forming of a pack of:(a) a core for the laminate,(b) at least one sheet of melamine impregnated paper or melamine impregnated fabric, heat-hardenable on one face of the core (a),(c) the said temporary support with the said vulcanizable layer being in contact with the component (b); and pressing the pack at 125-155.degree. C. to simultaneously vulcanize the rubber, harden the resin and combine the components into a monolithic laminated structure.

Abstract: In the production of a wall covering board which is shaped and composed of a substrate of corrugated paperboard and a decorative and/or protective skin layer, a hot-press for bonding of the skin to the substrate either simultaneously with or subsequently to shaping of the substrate is combined with a skin material support mechanism and a drag mechanism including a sheet-grasping device mounted on the piston rod of a piston actuator. The support mechanism supports, with friction force, a belt of a sheet material employed as the skin at its one end horizontally on one side of the press. The piston rod is horizontally extended from the opposite side of the press to traverse the press and allow the grasping device to grasp the supported end of the belt and then retreated until the grasping device returns to the opposite side of the press, so that the belt is stretched between the stationary and movable dies of the press. By applying heat and pressure to the stretched belt through the movable die, the belt, i.e.

Abstract: A method of thermoforming a thermo-plastics sheet carrying a protective layer of polyethylene on at least one of the surfaces of the sheet comprising heating the assembly of sheet together with its protective layer to above the softening point of the thermoplastic and subsequently stretching the assembly to a desired shape.

Abstract: Photographs and other indicia-bearing opaque sheets of paper are laminated to molded articles by:(a) positioning the opaque sheet of paper betweeen two flexible sheets of uncured catalyst-containing thermosetting melamine-formaldehyde condensation product, to form a layup;(b) applying the layup to a surface of a shaped three-dimensional article formed of a partially cured catalyst-containing thermosetting melamine-formaldehyde molding resin, with the indicia-bearing surface of the opaque sheet facing away from said article; and(c) applying heat and pressure to the assembly to cure the condensation product and complete the cure of the partially cured resin.

Abstract: Improvements are disclosed in the conventional process for the laminated packaging of etched circuitry consisting of:(1) A unitized form tool which is produced by photomasking a metal plate, with the same pattern master transparency that is used for producing the photoetched circuitry, followed by chemical milling of the exposed areas to a depth equal to the thickness of the circuitry,(2) the manufacturer's low pressure dwell cycle in the press for prepreg containing epoxy resin or polyimide resin is for either resin changed to 210.+-. 15 secs. at 10.+-. 1 psi and 340.degree. F.

Abstract: A method of forming a double-walled unit from thermoplastic materials, preferably polymethyl methacrylate, in which two sheets, one of which is provided with an aperture to allow the passage of air between the sheets, are stretched apart under thermoforming conditions by imposed pressure differences, the desired spatial relationship between the sheets being obtained by adjustment of the pressure differences, and in which the sheets are simultaneously bonded about their perimeters.

Abstract: An improved decorative resilient laminar panel and the method of fabricating said panel which is characterized by its shape-retaining compound contour and selected embossments over predetermined areas thereof and which comprises a perforated thermoplastic resin foam disposed between a pair of perforated cover sheets which are coated with a moisture-resistant sealing material. The resilient laminar panel is particularly applicable for use as automobile interior trim panels in which the exposed face surfaces thereof are provided with decorative coatings or decorative plies to enhance the aesthetic and functional characteristics thereof.

Abstract: A method and apparatus are disclosed for making a molded pulp product such as a plate or the like which has an upper liquid impervious layer integrally secured thereon. The pulp product is formed on a foraminous mold and, together with the mold, is heated to the softening temperature of a liquid impervious thermoplastic sheet material which is caused to be cut to size by engagement with a cutting edge on the mold whereafter the severed portion is drawn by suction and bonded to a selected surface area of the pulp product.

Abstract: A method of making a deep drawn, laminated, non-metallic article having h ballistic resistance and having a smooth edge which comprises, preparing a preform comprising a plurality of superimposed patterns of aromatic polyamide fabric impregnated with a thermoplastic or thermosetting resin, then either (a) trimming the preform to form a peripheral edge thereon so as to allow for application of additional resin in a suitable form to the peripheral edge during the final molding of the preform, applying the additional resin to the peripheral edge of the trimmed preform, and finish molding the article accompanied by flow of the additional resin about the peripheral edge to produce a smooth edge on the final molded article, or (b) applying an epoxy resin film on the outer surface of the preform, or on the superimposed patterns prior to making the preform, around the periphery of the preform or superimposed patterns and overlapping the line around the periphery of the preform on which cutoff occurs in the finish mol

Abstract: Method for forming visual display packages from blanks in which a plastic film covers a window region in the package, and in which a tab formed as part of the blank extends into the window region to support an article to be contained in the package and serve as a location for product codes and symbols or other information. At least one pocket is formed in the plastic film to receive an article prior to closing the package. The tab is rotated outward, and when the tab is located adjacent to the transverse axis fold line of the blank it assists in making the completed package free-standing. The tab may be bonded to a portion of the plastic film by a heat responsive thermo-plastic coating on the tab.

Abstract: A plastic laminate and shaped article having a polyurethane film substrate, a fabric superstrate and an intermediate layer of polyurethane foam. The polyurethane foam layer is cast upon the polyurethane film to provide a substantially integral laminate. The fabric layer is also bonded to the foam layer, preferably prior to complete curing, permitting the use of unnapped fabrics.

Abstract: Articles, such as wholly or partly insulated housings for electrical and electronic components, are made from bands composed of a relatively wider strip of one material and a relatively narrower strip of a second material laminated to each other, the band thus being "striped" in that it has one zone constituted by a laminate of materials and at least one other zone constituted by solely the first material. The articles are shaped and blanked in the band so that predetermined parts of the article are formed from only the first material and the rest of the article is formed from the laminate of the two materials.

Abstract: A process for manufacturing a body of a moisture-proof container having at least two recesses for packaging purposes which comprises adhering a metal foil to a first thermoplastic resin film with a hot melt-type adhesive to form a laminated sheet, forming at least two closed blank portions in said laminated sheet by cutting only the metal foil, adhering a second thermoplastic resin film on the surface of the metal foil and stretch-forming said closed blank portions of the laminated sheet at a temperature wherein the hot melt-type adhesive and the thermoplastic resin films are softened, thereby forming said recesses.