Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 4803034 | Concrete fabrication and concrete suctioning method Producing a concrete object by first pouring an uncured mixture into a mold and then removing undesired uncured concrete using a suctioning apparatus having a liquid supply and a suction nozzle attached to a suction channel. The concrete mixture is loosen... | 02/07/1989 |
| 4801361 | Method and apparatus for molding expandable polystyrene foam articles A method of molding expandable thermoplastic polymer beads in a mold to form articles of foamed material comprising: pulsing steam through at least one of the cavities to contact and expand the beads in the cavity for a finite period of time and drawing t... | 01/31/1989 |
| 4797246 | Continuous manufacture of a perforated plastic film A process is disclosed for the continuous manufacture of a perforated plastic film, where the plastic film is extruded directly from the extrusion unit either onto one roller of a pair of rollers or directly into the gap between a pair of rollers (a perfo... | 01/10/1989 |
| 4786351 | Process and apparatus for simultaneously shaping foam and laminating fabric thereto A machine for laminating fabric (123) to open cell cushion foam (124) while forming design lines in the foam is disclosed. The machine comprises a top hollow die (21) having perforations (38) and a complementary, hollow bottom die (54) which also has perf... | 11/22/1988 |
| 4786448 | Plastic processing method of pressure or pressureless sintered ceramic body There are disclosed a plastic processing method of the pressure of pressureless sintered ceramic body composed of at least one aluminum-containing compound selected from the group consisting of aluminum oxide, aluminum nitride and aluminum oxynitride and ... | 11/22/1988 |
| 4786451 | Method of manufacturing a metallurgical addition agent A method of manufacturing a metallurgical addition agent, especially an agent comprising silicon carbide fines, comprises a first step of forming a mix of at least 30% fines, cement and at least 20% water. The next step comprises pressing the wet mix in a... | 11/22/1988 |
| 4783291 | Method and apparatus for foam extrusion into a vacuum chamber having a liquid baffle with control of the liquid level A foam extrusion system and method employs a horizontal vacuum chamber with a bulkhead and extrusion die at one end of the chamber, the extrusion die being inside the chamber when the bulkhead is closed. A liquid baffle, preferably water, is provided at t... | 11/08/1988 |
| 4780262 | Method for making composite structures A flexible rubber boot that transmits molding pressure to the inner surface of the structure to be molded is placed on a support fixture. The boot is held in place by a vacuum applied between the fixture and the boot. Prepregs are laid up on the boot to t... | 10/25/1988 |
| 4777000 | Production method of expansion-molded article of polypropylene resin An expansion-molded article of a polypropylene resin is produced by filling pre-foamed particles of the polypropylene resin, which have a crystalline structure featuring an inherent peak inherent to the polypropylene resin and a high-temperature peak on t... | 10/11/1988 |
| 4774957 | Material for diagnosis by nuclear magnetic resonance imaging A material for diagnosis by nuclear magnetic resonance imaging is provided. The material comprises a hydrogel having a high water content. The hydrogel is prepared by the steps of casting an aqueous polyvinyl alcohol solution into a mold, cooling the case... | 10/04/1988 |
| 4772434 | Soap making process A process for the preparation of soap and soap/synthetic detergent products from raw materials normally employed in the manufacture of such products including fatty acids, triglycerides and caustic by subjecting such raw materials to intensive countercurr... | 09/20/1988 |
| 4769100 | Method of applying carrier films prepainted with metallic paint to automobile body panels A method of applying a carrier film prepainted with metallic paint containing metal flakes to an automobile body panel in a vacuum forming process.... | 09/06/1988 |
| 4766188 | Production of tetrafluoroethylene polymers Production of coagulated dispersion grades of PTFE using an aqueous emulsion polymerization process which employs an initiator system comprising disuccinic acid peroxide and ammonium sulphite, the latter being added during the course of the polymerization... | 08/23/1988 |
| 4761257 | Method and apparatus for foam molding packaging using a staged vacuum A method and apparatus for foam molding packaging using a staged vacuum system to place a plastic sheet used as a release agent in conformity with the surface of the mold is provided. A mold having a complex image divides the mold image into separate and ... | 08/02/1988 |
| 4759887 | Apparatus and process for the manufacture of shaped bodies from silicon granulates A process for the manufacture of shaped bodies from silicon granulates for producing silicon melts includes first incipiently melting silicon grains on their surfaces, so that they bond with their neighbors in the process and, after solidifying, form a po... | 07/26/1988 |
| 4759891 | Method and apparatus of foam molding packaging using a vertical mold A method and apparatus of foam molding packaging using a positive vertical mold is provided in which a vertical mold with sides having channeled vertical flap areas is automatically covered with a plastic sheet. Brushes, assisted by a vacuum assure the pl... | 07/26/1988 |
| 4747987 | Process for the production of filler-containing acrylic and modacrylic fibers Silica-containing acrylic and modacrylic fibres are obtained without spinning defects in that an aqueous silica sol is reacted with a silane and with a polar organic solvent, the sequence in which the two agents are added being optional, the water is dist... | 05/31/1988 |
| 4744934 | Process for devolatilizing molten oxymethylene polymer A process is provided for reducing black speck formation which occurs during melt processing of oxymethylene polymer compositions containing polyamide stabilizers having a melting or softening point below the melting point of the oxymethylene polymer and ... | 05/17/1988 |
| 4743411 | Process for producing shaped silicon carbide article from a polycarbosilastyrene copolymer A polycarbosilastyrene copolymer which comprises recurring carbosilane units of the formula I: ##STR1## and recurring silastyrene units of the formula II: ##STR2## is useful for producing a shaped sintered silicon carbide article by shaping... | 05/10/1988 |
| 4743419 | On-line film fluorination method An on-line film fluorination apparatus cooperative with a continuous polymer film extruding apparatus is set forth. In the preferred and illustrated embodiment, a continuous feed film is introduced into a closed cabinet or housing having alignment and gui... | 05/10/1988 |
| 4743417 | Method for the manufacture of product comprising foamed plastic material and using a low-pressure chamber A propellant is mixed with unsaturated polyester inside a first space (A) at a first pressure, for example at the atmospheric pressure. The polyester is then sprayed on the whole or parts of an open or exposed mould which is applied in a low-pressure cham... | 05/10/1988 |
| 4737328 | Infiltration of material with silicon A process for producing a composite by embedding a porous body at least partly composed of a substance which reacts with silicon in a powder mixture composed of silicon and hexagonal boron nitride powder, heating the resulting structure to a temperature a... | 04/12/1988 |
| 4732720 | Process for the production of uniformly dyeable nylon 66 fiber A nylon 66 fiber capable of being uniformly dyed is made by extruding a melt of nylon 66, passing the extruded filaments through a heating zone provided at the surface of the extrusion nozzle and having a length of at least about 5 cm to about 100 cm and ... | 03/22/1988 |
| 4730009 | Plastic foams and method of making same A plastic foam is made by mixing a plastic material or its origin material with a blowing agent which does not react with the material, said agent having a maximum vapor pressure of 10 Pa at the highest permissible application temperature of the plastic f... | 03/08/1988 |
| 4728473 | Process for preparation of polyparaphenylene terephthalamide fibers A process for the preparation of poly-p-phenylene terephthalamide fibers according to the wet spinning method comprising passing an optically anisotropic solution of a poly-p-phenylene terephthalamide type polymer through a non-coagulating fluid layer and... | 03/01/1988 |
| 4725393 | Method for vacuum compression of laminated sheet material A laminate consisting of a number of air-permeable sheets of a material is placed on the supporting surface of a table, and a major portion of the periphery of the laminate, inclusive of a lower surface thereof, is covered with a sheet impermeable to air.... | 02/16/1988 |
| 4722816 | Method for the preparation of shaped articles of a vinyl chloride-based resin having improved surface properties A vinyl chloride-based resin is compounded with a filler, e.g. calcium carbonate, having been treated on the surface with an epoxy compound such as 3-glycidyloxypropyl trimethoxy silane in advance and the resin composition is shaped into an article which ... | 02/02/1988 |
| 4717518 | Novel process for making polyurethane products which require reduced crushing in preventing said products from substantially shrinking or changing dimensionally upon cooling A process for making molded high resilience polyurethane cellular products which require reduced crushing in preventing the products from substantially shrinking or changing dimensionally upon cooling which comprises: exposing the curing product to atmosp... | 01/05/1988 |
| 4702871 | Method for melt-spinning thermoplastic polymer fibers A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube ... | 10/27/1987 |
| 4699744 | Method of manufacturing a photographic reflecting support A method of manufacturing a photographic reflecting support wherein chips and/or resin scraps of a thermoplastic resin are heat-treated in a vacuum and fed into an extruder to be melted and then extruded in the form of a sheet out of the die of the extrud... | 10/13/1987 |
| 4698192 | Apparatus for manufacturing a laminated unit of ceramic green sheets An apparatus for manufacturing a laminated unit of ceramic green sheets comprises an endless belt, and an applying apparatus provided at a predetermined position on the running path of the endless belt. The applying apparatus includes a reservoir for stor... | 10/06/1987 |
| 4698196 | Method and apparatus for extruding creaseless thin walled tubes Apparatus for preparing seamless, creaseless, pliable, thin-walled tubes comprising means to extrude a moving continuous tube of polymeric film material from a die, means to radially stretch the continuous tube as it emerges from the die, means to longitu... | 10/06/1987 |
| 4693858 | Method of processing hydrocolloid dressings A method of processing hydrocolloid adhesive material includes the steps of extruding a sheet of the hydrocolloid adhesive material from a vacuum extruder, applying a liner of release material to at least one side of the sheet, under pressure, and while t... | 09/15/1987 |
| 4692290 | Process for devolatilizing molten oxymethylene polymer A process is provided for removing volatile materials from a molten oxymethylene polymer, according to which the molten polymer is passed through a rotating disk polymer processor having at least three stages; a first devolatilization stage, then a stabil... | 09/08/1987 |
| 4690862 | Integral composite profile of cellular and non-cellular resins and a dual extrusion method for its manufacture The dual extrusion and fusion of cellular and non-cellular resin extrudates produces an integral composite profile having a tongue and groove interlock. The resins are extruded through a common die having overlapping orifices. A bulbous tongue of one extr... | 09/01/1987 |
| 4684489 | Process for making a composite wood panel A process for making a composite wood panel, fiberboard or the like comprises putting a mat to be pressed between the press platens of a press, compressing the mat with heated press platens in a first compression step without feeding in steam until a dens... | 08/04/1987 |
| 4681901 | Neoprene foam of increased continuous volume The invention claimed here comprises a process for producing neoprene foam structures which are greater than four inches in diameter. The claimed invention also comprises a structure of neoprene with a thickness greater than about four inches composed of ... | 07/21/1987 |
| 4673695 | Low density microcellular foams Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The pha... | 06/16/1987 |
| 4671907 | Method of manufacturing carbon materials A method for the manufacture of high-strength, high-density carbon materials is disclosed. The method comprises the steps of pulverizing a carbonaceous raw material having a carbon content of at least 92% by weight, a volatile content of 7-20% by weight u... | 06/09/1987 |
| 4670203 | Method for manufacturing molded products of polyethylene terephthalate A method for manufacturing molded products of polyethylene terephthalate by injection molding a material containing polyethylene terephthalate as the principal component characterized by using virgin and/or waste polyethylene terephthalate of average mole... | 06/02/1987 |
