Abstract: An electrophotographic fixing device having a heat roller covered with a layer of silicone rubber, and an oil applying assembly for coating the surface of the heat roller with an offset preventing agent, such assembly comprising a felt impregnated with the offset preventing agent, and a metallic roller in surface rubbing contact with the felt to prevent offset of a toner image formed on a sheet passing over the heat roller surface, the present fixing device having a surface of its metallic roller roughened and in contact with a doctor blade of a material having a lower hardness than the material of the metallic roller. The doctor blade is in pressing contact with the roughened surface at a location to the rear of the position of rubbing contact between the felt and the metallic roller relative to the direction of rotation of the metallic roller.

Abstract: A heat fixing device for use in an electrophotographic copying machine in which an electroconductive layer is provided in the surface of one of the fixing and pressure rolls for preventing charge built up upon the surface of the roll. The layer is preferably provided as an aluminum plated layer covered by a non-adhesive releasing layer made of a material such as tetrafluoroethylene or HTV or RTV silicone rubber. Provision of the electroconductive layer prevents an electric field from forming extending through a sheet carrying an image to be fixed thereby substantially entirely, eliminating any offset produced on the roll.

Abstract: A cladding process and apparatus in which steel strip or sheet is cladded with a metal of lower melting point, e.g. lead, by maintaining a bank of constant level of the molten cladding material between a belt and the strip or sheet substrate which passes along an inclined path and is cooled to harden the molten material thereon. During the cooling process the applied material is compressed against the substrate.

Abstract: In this process there is determined, as a function of the conditions of the environment or other conditions, the distance from the surface of the bath at which the temperature of the zinc coating on the sheet or strip is in the range in which the zinc passes through a liquid-solid transitory state which is characterized by its friability. There is exerted at this point a mechanical action on at least one of the sides of the sheet or strip so as to completely remove away the whole of the non-alloyed zinc and allow to remain only a thin iron-zinc alloy coating whose thickness is between 1 and 2 .mu.m, which represents an amount of alloy of between 7 and 15 g/m.sup.2.

Abstract: A fixing device for an electrophotographic copying machine which includes a pair of rollers forming a nip therebetween through which the copy paper passes and an applicator which is capable of feeding a sufficient quantity of offset-preventing liquid only to the portion of the rollers where the leading end of the copy paper, will contact with the supply of offset-printing liquid to the remaining portion of the rollers being minimized to a quantity necessary for the preventing of offset. The consumption of offset-preventing liquid is reduced and the swelling of the silicone rubber coatings on the rollers, when used, is inhibited.

Abstract: An apparatus and method for applying a uniform coating of liquid solder to a flat tube particularly at and adjacent to the side edges of the tube. The apparatus has spaced heated platens comprising shaping die members located opposite to each other and including tube embracing recesses forming a slot through which the liquid solder coated tube is passed. The disclosure also includes spacing means for spacing these die members apart a distance equal to the width of the coated tubes and yieldable means such as springs urging the spaced heated platens toward each other to bear against the side edges of the tube together with means for drawing the coated tube between the heated platens and means for heating the platens in the vicinity of the tube to a temperature above the melting point of the solder as well as passages permitting draining of excess solder from the tube during its passage between the heated platens.

Abstract: A reactive polyurethane mixture is applied by a high pressure airless spray applicator directly onto the primary backing of a moving substrate such as a carpet web. The applied reactive mixture is allowed to foam to an approximate predetermined thickness and density. While the blown or foamed backing layer still possesses substantial residual tackiness, it is compressed or regauged to a precise uniform thickness and simultaneously is provided with either an embossed or a smooth surface. The tack of internal cell walls of the blown backing layer retains the layer at the regauged thickness. Curing of the regauged backing layer by externally applied heat and/or by the heat of the exothermic reaction in the applied mixture is completed. Detackifying agents are applied to the regauging devices and/or to the applied backing layer to prevent adherence of the layer to the regauging devices. A surface skin formed of the detackifying agents is cured on the regauged backing layer.

Abstract: An aqueous coating composition containing thermoplastic synthetic resin emulsion is applied to a paper web to form a coating layer and dried at a temperature to maintain the coating layer below the glass transition temperature of the thermoplastic synthetic resin emulsion. The coated paper web is passed on a finishing roll having a mirror-like metal surface heated to a temperature above the glass transition temperature of the emulsion. The surface of the coating layer of the coated paper web is brought into pressing contact with the finishing roll and heated to a temperature above the glass transition temperature of the emulsion, while the coated paper web is passed on the finishing roll. The coated paper web is cooled until the temperature of the surface of the coating layer is reduced to a level not exceeding the glass transition temperature of the emulsion by 30.degree. C.

Abstract: An apparatus and method for applying a uniform coating of liquid solder to a flat tube particularly at and adjacent to the side edges of the tube. The apparatus has spaced heated platens comprising shaping die members located opposite to each other and including tube embracing recesses forming a slot through which the liquid solder coated tube is passed. The disclosure also includes spacing means for spacing these die members apart a distance equal to the width of the coated tubes and yieldable means such as springs urging the spaced heated platens toward each other to bear against the side edges of the tube together with means for drawing the coated tube between the heated platens and means for heating the platens in the vicinity of the tube to a temperature above the melting point of the solder as well as passages permitting draining of excess solder from the tube during its passage between the heated platens.

Abstract: This invention relates to a device for coating paper with a resin in a pattern to increase the tear strength of the paper by using an applicator head, rotatable about a shaft through which the resin material is passed through nozzles on to the paper. The resin material is supplied at a constant rate and at a constant temperature and pressure to paper moving at a predetermined speed.

Abstract: An improved elongated coating rod holder for a coating doctor apparatus wherein the rod holder has formed therein an elongated cavity for receiving the coating rod with the cavity comprising at least two sealing surfaces therein. The coating rod holder also has formed therein a cooling water chamber formed as a plurality of smaller chambers having an interconnecting passageway between adjacent chambers. The cooling water chamber is formed directly below the elongated cavity which is connected to at least one cooling water inlet and at least one cooling water outlet formed in the rod holder.

Abstract: A device and method for accurately dispensing liquid photopolymer in accurate predetermined configuration to form a printing plate blank. The device gravity feeds the photopolymer from a first manifold through capillary tubes to a second manifold machined in an elongated member together with a doctor blade portion, laying down a carefully sculptured sheet. The sheet is formed into a printing plate upon exposure to actinic light through an indicia carrying negative. The invention may have other applications.

Abstract: Method and apparatus for controlling and particularly for reducing the retention rates of viscous impregnate or coating materials on fibers, strands or textile ribbons are disclosed. The impregnated or coated material is submitted to successions of compressions and decompressions. Drainage of the viscous material is effected in the decompression intervals which separate the compression intervals.

Abstract: A method of depositing and affixing a layer of a copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene upon a metal surface and the article prepared thereby, is disclosed. A flame sprayed metal surface having an optional fluoropolymer primer thereon is powder coated with the copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene and the powder is fused thereon. An improved long life fuser member for use in a fusing apparatus for fixing toner images to copy sheets by the application of heat and pressure is described.

Abstract: Rubber is applied to a cylindrical workpiece by a feed surface arranged to form a nip with the workpiece into which the rubber is caused to be drawn by movement of the feed surface along the workpiece. The resulting compression of the rubber in the nip renders the rubber plastic so that the rubber flows onto the workpiece to form a layer of thickness determined by the spacing of the feed surface from the workpiece on the workpiece surface. The layer of rubber is then smoothed either by roller or smoothing plate and is then vulcanized.

Abstract: An applicator mechanism for applying fuser oil to a fixing roller of an electrostatic copying device includes an apparatus for supplying the oil to a first wick means, or to selected portions thereof. A second wick means includes a web interposed between the first wick means and the roller. The web is movable between take-up and supply reels.

Abstract: A layered wax taper candle having a centrally disposed wick in which the wax and the layers is disposed in a streaked wood-grain like arrangement. Apparatus for fabricating the taper candles includes a rotating table driven in a horizontal plane by a driving motor. Wick holders are disposed in spaced relation near the periphery of the table so that they are driven in a rotary path to pass through a pouring station also located at the periphery of the table. Pouring spouts are located at the pouring station for directing a stream of liquid wax to flow therefrom. The stream of liquid wax has opposing lateral flow direction components therein. A combination recovery sump and liquid wax storage container is located below the pouring point to retrieve liquid wax emitting therefrom. A submerged pump is in the container to urge the liquid wax from the container through a conduit to the spouts at the pouring station.

Abstract: Fuser apparatus for utilization in a xerographic reproducing apparatus for fixing toner images adhered to substrates wherein the fuser apparatus comprises a heated fuser roll and a backup roll cooperating therewith to form a nip through which the substrates pass with the toner images contacting the heated fuser roll. A non-contact silicone oil applicator is provided together with a metering blade for applying a uniformly thick coating on the surface of the fuser roll which coating serves to minimize effect of toner.

Abstract: A layered wax taper candle having a centrally disposed wick in which the wax and the layers is disposed in a streaked wood-grain like arrangement. Apparatus for fabricating the taper candles includes a rotating table driven in a horizontal plane by a driving motor. Wick holders are disposed in spaced relation near the periphery of the table so that they are driven in a rotary path to pass through a pouring station also located at the periphery of the table. Pouring spouts are located at the pouring station for directing a stream of liquid wax to flow therefrom. The stream of liquid wax has opposing lateral flow direction components therein. A combination recovery sump and liquid wax storage container is located below the pouring point to retrieve liquid wax emitting therefrom. A submerged pump is in the container to urge the liquid wax from the container through a conduit to the spouts at the pouring station.

Abstract: A method and apparatus is provided for continuously making fiber reinforced plastic pipe in which a conveyor tube is formed on an axially fixed hollow rotatable mandrel. A plurality of bands of resin impregnated fiber elements are wound on the conveyor tube as it advances to provide the pipe assembly. The terminal end of the generated pipe assembly is sealed with a plug. A fluid under pressure is fed through the hollow mandrel and out the forward end of the mandrel into a chamber formed by the generated pipe assembly, the plug, and a fluid sealing means within the pipe assembly being generated, thereby causing the pipe assembly to advance. Means continuously advance an endless band to doctor freshly coated strip. Means pivot the band mounting means whereby to adjust the angle of the band with respect to the coated strip.

Abstract: In a transfer-fixing device for transferring a developed image from an image carrier onto a transfer medium, there is provided urge means for urging the transfer medium against the image carrier, and heating means disposed adjacent the urge means for heating the urge means substantially at the same time that the transfer medium is urged against the image carrier.

Abstract: Electrophotographic copying apparatus is disclosed including electrically heatable contact fixing means for fixing an electrophotographically produced toner image on an image carrier. The fixing means includes an electroconductive fixing layer mounted in insulated relation upon a continuously moving web which, in the preferred embodiment, comprises a cylindrical member. Heating electrical energy is supplied to said electroconductive fixing layer via contact cap means which are mounted on the ends of the cylinder member and which engage the free edges of the electroconductive layer throughout the length thereof, respectively, and stationary sintered bearing means that are electrically connectd both with the contact means and with the source of electrical energy.

Abstract: Apparatus of the type which fuses toner images onto support material by heat and pressure including an instantly heated fuser roll and a pressure back-up roll having an elastomeric surface. The fuser roll has a cylindrical member made of quartz or other material which transmits radiant energy from a source located on the interior of the cylindrical member. The cylindrical member has a first layer made of elastomeric material which transmits radiant energy. The first layer is covered with a second layer of material which absorbs radiant energy. A third layer of material covers the second layer of heat absorbing material to effect a good toner release characteristic on the fuser roll surface. The third or image contacting layer may be made of an elastomeric material where dry fusing is preferred or alternatively a rigid material where a silicone oil is applied to the image contact layer to prevent toner offset onto the fuser roll surface.

Abstract: A method for preparing polymer coated rolls for use in a xerographic reproducing apparatus is given whereby coatings of tetrafluoroethylene primer and enamel are applied, dried at low temperatures and baked at temperatures below the fusion temperature followed by a final heating step to fuse the tetrafluoroethylene enamel coating.