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5093171 Processes to manufacture weatherable monolithic coverings, and composites useful therefor  
A method of seaming polymeric composite pieces to form a unitary cover which is impervious to the weather is disclosed. The method comprises assembling one or more pieces of a fused composite...
5086825 Method for manufacturing foam pattern assemblies  
A foam pattern assembly includes a parting line, and a surface which is intersected by the parting line and which includes a first surface portion and a second surface portion offset from the...
5037500 Method and apparatus for joining tubular plastic parts by welding  
A heating arrangement (2) embracing tubular parts (1a, 1b) of plastic material which have to be joined by welding, comprises electrically heatable jaws (26).A bladder (50) expandable by compressed...
5017259 Preparation of catheter including bonding and then thermoforming  
A catheter is manufactured by tapering a distal portion of a hollow catheter body, bonding a tip member of relatively soft material to the tapered distal portion of the catheter body, and...
5007767 Method for joining polyolefin pipes by fusion  
A liner or other elongated duct is made by joining lengths of thin-walled polyethylene fusion. Typical thickness 2-4 mm, diameter 200 mm. Pipe ends are clamped in clamps which restore circularity....
5006198 Jig for retaining welding mitered joints between the members of molded plastic window and door frames  
A jig for welding mitered joints between members of molded plastic window and door frames, comprising four mutually positionable clamp assemblies, one to each corner of the frame, each of which...
4995935 Welding machine for butt welding of plastic profiles  
A welding machine for butt welding of plastic profiles is outfitted with profile clamping units (2, 3) capable of sliding in relation to each other, and a heat reflector (15) which can be...
4990296 Welding of filled sintered polytetrafluoroethylene  
A method for welding together filled sintered polytetrafluoroethylene components. The ends of the components to be welded are carefully tapered to form reverse mated surfaces and then assembled in...
4987018 Joining polyolefinic members by fusion  
Members especially hollow members 10, 12 such as pipes and pipe fittings one member 12 of cross-linked polyethylene say and the other member 10 of medium density polyethylene say are joined by...
4971639 Method and apparatus for joining polymeric substrates such as vinyl frames  
A method and apparatus are provided for welding vinyl window and door frames. The apparatus includes a counting circuit or the like for measuring the time taken for burning off a selected length...
4969972 Device for welding tubular components of thermoplastic material  
A device for welding tubular components of thermoplastic material. The device includes a heating device for generating the necessary melting temperature arranged at the circumference and at the...
4963219 Method of making and assembling roof edge structures incorporated with single-ply polymer-coated fabric roof structures  
A single-ply, thermoplastic membrane roof construction includes, at its corners, a pair of right angularly disposed substantially rigid, edge corner pieces welded together along a mitered joint by...
4960478 Apparatus and process for the fusion bonding of thermoplastic articles  
An apparatus for heat sealing thermoplastic articles includes a heater movable reciprocably in a longitudinal direction, and two opposed transversely reciprocable and pivotable carriers, each...
4957570 Butt-welding of pipes  
The invention relates to the butt-welding of pipes of plastics materials. Equipment is alreaady known where pipe ends are first urged against a trimmer plate, and then urged against a heater plate...
4954299 Structures of plastics material  
Large fittings or other structures are made by rotationally moulding a first component 18 of polyethylene and joining cylindrical pups 20, 22, 24 of polyethylene to the component by butt fusion...
4946528 Method and equipment for producing protective-coated steel pipe  
An improved method for producing a protective-coated steel pipe in a construction work site by spirally winding and melt-bonding a belt-like thermoplastic synthetic resin sheet around the outer...
4938820 Joining of sheets  
A sealing strip, particularly for making a telecommunications splice case comprises a sintered ultra high molecular weight polyethylene strip that can weld together parts of, for example, a...
4933036 Techniques for welding thermoplastic tubes  
Two thermoplastic tubes are welded together by pre-cutting the tubes to create two ends which are axially aligned when placed in a holding device. A wafer is inserted in the space between the cut...
4931126 Apparatus and method for joining a plurality of thermoplastic tapes  
The present invention relates to a seaming apparatus a method for producing a continuous sheet of thermoplastic material having a predetermined width from a plurality of elongated thermoplastic...
4929293 Welding fluoropolymer pipe and fittings  
The method of joining together the ends of ducts made of melt processible fluoropolymers such as Teflon PFA, which are characterized by a high degree of chemical inertness and a continuous service...
4927642 Apparatus for welding tubular components of thermoplastic material  
An apparatus for welding tubular components of thermoplastic material. The apparatus includes a heating device for heating the ends of the tubular components to be welded together until the...
4925519 Collapsible contact heating platen  
A contact heating platen assembly includes an upright central standard, a plurality of inclined linking members pivotally mounted to the standard, and to a pair of opposed platen carriers on...
4923659 Method of welding tubular components of thermoplastic material  
A gaseous medium, preferably compressed air or nitrogen, is introduced into the interior of the tubular components to be welded together from one end and is discharged at the other end through a...
4921570 Apparatus for manufacturing a welded connection of tubular components of thermoplastic material  
An apparatus for manufacturing a welded connection of tubular components of thermoplastic material includes a bracing device and a heating device to be inserted into the tubular components. The...
4919743 Method of laying carpet to avoid seam peaking and apparatus therefor  
A method of laying carpet to avoid seam peaking, the method employing an enhanced width seaming tape spanning the abutting edges of the carpet forming the seam. The tape has a hot melt adhesive on...
4915758 Raceway frame and method for curved modular wall panel  
A raceway frame for a curved modular wall panel is made of molded thermoplastic material in order to avoid the expense of secondary forming operations. The frame is generally of an I-shape and is...
4909892 Apparatus for welding thermoplastic frame members  
An apparatus for simultaneously welding two or more pairs of thermoplastic frame elements is disclosed. The apparatus includes a clamp or jig assembly which maintains the frame elements in...
4904319 Method of ultrasonic splicing tire tread strip edges  
A method for splicing beveled edges of a relatively thick tire tread strip free of internal reinforcing cords by ultrasonic energy. A contact face of a sonic welding tool or horn is pressed...
4897138 Sealing of plastic tubes  
A plastic tube is sealed at its end by placing the tube in a pair of spaced apart tube holders having tube receiving pockets. The tube is cut by a cutting device movable into and out of the space...
4880679 EMI Shielded plastic composites  
The conductance between conductive fibers utilized in a composite panel and the surface of the panel is improved by the use of conductive inserts which are pressed into the surface of the panel...
4872940 Apparatus for the continuous welding of strips and/or sheets  
The invention relates to an apparatus for the continuous butt welding of strips and sheets by laser beams. The sheets or strips 1,2 are moved together in abutment and retained in the same level by...
4867835 Waterstop splicing method and apparatus  
A waterstop splicing method and apparatus including a table having first and second coplanar aligned table top surfaces that simultaneously and equally, open and close by mechanical means driven...
4863541 Apparatus and method for manufacturing heat-shrinkable sleeve using solid core  
Long lengths of a heat-shrinkable sleeve for use in splicing electrical cables and the like are manufactured by providing an elongated impermeable core having a smooth outer surface, extruding an...
4851647 Process for welding butt-jointed plastic tubes and welding device for performing the process  
In order to weld butt-jointed plastic tubes, a welding element with a wire coil for electrical resistance heating is positioned between the abutting tube ends. The tube ends are pressed to each...
4812189 Process for assembling two films, in particular films of a few microns thickness  
The invention relates to a process for joining films by heat sealing, where these films are in rolls (9) and in particular a few microns thick. In a first stage, this process consists in spreading...
4801349 Apparatus for butt-welding plastic pipe sections or plastic fittings  
The invention is a method and apparatus for butt-welding two adjoining plastic tubular members which are held in axially adjustable mountings and which are joined together under axial pressure...
4801343 Method for manufacturing a case having multiple walls  
A method for manufacturing a multiple-wall synthetic-resin case having vertical multiple walls. The case is manufactured by integrating both upper and lower halves into one piece by jointing...
4793880 Sterile welding of plastic tubes  
A linear welding process and apparatus connects fluid-filled tubes in a sterile manner. The linear welder includes a base on which a carriage is slidably mounted. A pair of side by side arms are...
4767490 Apparatus and method for permanently joining screw conveyor modules  
Apparatus and a method for permanently joining integrally formed plastic screw conveyor modules is disclosed. A support means supported by a base supports a multiplicity of previously joined...
4764328 Method of fusion bonding low density thermoplastic bodies  
A method for contact fusion bonding of compressible, low density thermoplastic parts is disclosed, which comprises essentially: (a) fluidizing only a surface film on opposed mateable margins of...
4755429 Composite graphite separator plate for fuel cell stack  
A graphite separator plate for an electrochemical cell stack is formed from component parts which are joined together edge to edge. The edges of the plates are scarfed to increase the bond area...
4753697 Total-containment sterile process and system  
A process and system is provided for making a connection between two fluid-filled plastic tubes that ensures total containment of potentially dangerous fluids and maintaining sterility of the...
4752512 Process for the manufacture of screen components of various lengths for system screening decks and screen component  
The subject matter of the application is based on a process for the manufacture of screen components of various lengths for system screening decks, the screen components having substantially the...
4752350 Device for making welded corner joints  
In the manufacture of welded corner joints between hollow plastic sections shaped parts are used which abut against the plastic sections during the heating-up operation and also during the welding...
4746384 Apparatus and method for permanently joining plastic screw conveyor flights  
Apparatus for bonding or joining confronting edges of flights of adjacent integrally molded screw conveyor modules is disclosed. The apparatus comprises means for supporting a plurality of the...
4731140 Wooden tile and a method of making the same  
A wooden tile which is preferably used for floor covering is formed by a number of individual members which are bonded together. The wooden tile is made by knife cutting a sheet of wood from a...
4726867 Carpet seaming support and method  
A hot melt carpet seaming support which includes a plurality of flat generally rectangular slats, wherein the mid portion slats are slidable on a flexible wire or filament into abutting relation...
4719136 High frequency weldable textile material  
A plastic textile material comprising a fiber web such as woven and knitted fabrics, felt or velvet. The web may be covered with plastic on one side by a backing or the web fibers may be plastic...
4689108 Apparatus for assembling electrochemical batteries and similar articles  
A press is arranged to compress a workpiece between two turntables. One of the turntables is adapted to be rotated which, in turn, rotates the workpiece and the other turntable, a heating element...
4684417 Process for the control of the welding time of an electrical welded union  
Two tubes of thermo-plastic material are joined by a sleeve in an inner portion of which there is an electrical resistance coil, the ends of which are connected to terminals projecting from the...