Abstract: Thermoforming machines with a heating station and a downstream mold station have carrier clamp frames for gripping the edges of sheets of plastic at a load station and indexing them successively to a heating station and a mold station. The carrier frame members to which the plastic may be releasably clamped carry their own remotely operated clamps and are themselves expandable and contractible to a condition in which, prior to molding, they control the sag in the sheet formed during heating of the sheets to differential pressure forming temperature. The plastic sheet can be molded to only a portion of a product which functions as a mold member.

Abstract: A method of and apparatus for making, and the resulting material for fabricating reclosable bags and in which a length of web of predetermined width of bag material as wound on a mandrel has fastener strip sections joined to and across the width of the web. The web is adapted to travel continuously spirally about the mandrel. The fastener carrying web may be folded longitudinally and resiliently flexible profiles of the folded fastener strip sections separably joined. Ends of the fastener strips before, and after, folding may be flow melted and fusedly flattened. Ends of the fastener strips may be aligned with a fold juncture of an underturned flange of the web and the margin then unfolded to extend beyond the strip ends.

Abstract: A method and apparatus for forming draw tape bags wherein the bag material moves continuously during the manufacture, except for the last step. A roll of folded web is provided, and the loose edges are turned inwardly to form upper hems for the bags. The web continues to move, and a cutter is actuated to move through a circle and engage the web to punch finger holes in the hem. The web is further carried to a tandem sealer, the web passing over a roll where heated air is directed at the area of the hem. A "Teflon" strip is placed between the hems to prevent sealing them together. The web continues to a second sealing roll where the opposite side is sealed in the same way. The final step utilizes a stop-start apparatus with a side sealing blade. The side sealing blade has one radius for the body of the bag, and a larger radius for the hemmed area.

Abstract: A process and apparatus are described wherein a honeycombed sheet of plastic is extruded from an extruder and at least one protective film of plastic is joined onto at least one of its surface layers, the protective film having a softening temperature lower than that for extruding the sheet. The protective film, combined with the auxiliary film or support film, is laid onto the surface of the sheet leaving the extruder; then the sheet, protective film and support film are subjected to the calibrating and cooling stage; and lastly the support film is separated from the sheet. The protective film has now been made an integral part of the sheet, thereby to produce, for example, a protected honeycombed sheet.

Abstract: A method and apparatus is provided for securing together overlapping portions of a thermoplastic strap loop around an object. After the strap is fed to form the loop, the upper strap portion is restrained while pulling the strap trailing portion to tension the loop. Lengths of the upper and lower strap portions are then gripped together in face-to-face contact to hold the loop in tension. The trailing portion is severed from the loop lower strap portion, and the restraint of the upper strip portion is terminated. A heating member is extended between the upper and lower strap portions in a direction generally parallel to the strap length. The upper and lower strap portions are pressed against the heating member to melt regions of the strap. The heating member is withdrawn, and the melted regions are pressed together as the melted regions solidify to form a joint. Included in the apparatus are coacting first and second gripper means, an anvil, a cutter, and a heating member.

Abstract: Disclosed herein is a method for glueing corrugated board and an apparatus for carrying out the same, the method comprising: heating a starch glue to a predetermined temperature range by heat exchange; supplying the starch glue to a glue pan placed in a hot atmosphere of a heat-insulated space so as to maintain the glue in a heated state; feeding a corrugated core sheet and a liner into the heat-insulated space; applying the heated starch glue to ridge portions of the corrugated core sheet; and bonding together the corrugated core sheet and liner.

Abstract: A welding apparatus for welding together overlapping ends of two lengths of thermoplastic synthetic resin sheets at a welding station comprises a wedge-shaped heating device for softening the thermoplastic synthetic resin along the overlapping sheet ends, the heating device being arranged ahead of the welding station in an operating direction and being displaceable in said direction. The apparatus has a frame including two parallel frame parts, a part connecting the two frame parts, the connecting part being rigidly affixed to one of the frame parts and the other frame part being pivotally mounted on the connecting part, and spring steel rods biasing the other frame part for pivoting towards the one frame part. Two oppositely disposed, motor-driven pressure rollers are pressable against each other, one of the rollers being mounted on the one frame part and the other roller being mounted on the other frame part.

Abstract: In a process for connecting material segments made of an elastomere or of a thermoplastic material the sections to be joined (3,4) are placed between two pressure beams (1,2) in the area of the seam (5) to be created. The pressure beams are not mechanically connected to one another. The forces necessary to hold and to attach the material segments (3,4) are generated by the evacuation of suction chambers formed between the cavities (9) in the contact surfaces (6a,6b) of the pressure beams (1,2) and the segments to be joined (3,4).

Abstract: Apparatus and method for heat sealing a selected segment of a web of at least two layers of biaxially oriented plastic film. The web layers are pressed together and a selected segment of the pressed web is heated above the bonding temperature of the plastic while adjacent web segments are maintained below that temperature. The surfaces pressing thus the heated web segment has a relatively lower surface friction than the surfaces pressing the adjacent web segment, whereby the layers of the heated segment of the web are physically unrestrained against shrinking during heating and are allowed to shrink back to their pre-oriented molecular configuration while the adjacent segment is restrained against movement. A hermetic bead seal is thus formed between the web layers. A product heat sealed according to the novel method is also disclosed.

Abstract: A hot glue pistol for melting and dispensing a hot melt glue (3) comprises a hot air blower (6) for heating the bonding location, the hot air flow simultaneously acting as the heat source for melting the glue.

Abstract: The apparatus increases the hydraulic pressure in rams 16 until one pipe moves towards a heater plate 14. The movement is detected by a limit switch 26 and a microprocessor-based control system 28 adds a pre-programmed value of pressure to that pressure which caused the movement (drag pressure). The total pressure is applied to force the pipe ends against a heater plate 14 to form end beads (bead-up). After heating for a pre-programmed period the control system automatically initiates plate retraction and forces the pipe ends together (fusion) for another programmed period. The applied pressure is the sum of the recorded drag pressure and a pre-programmed added pressure. Operator judgement of bead size, pressures and time periods is eliminated. Pressurised fluid is supplied to the rams 16 from a pump and accumulator combination. The sense of ram motion is determined by changeover valves controlled by the control system 28.

Abstract: A method and apparatus for heating selected portions of an article include transport means for moving the article into a heating compartment. Shroud means, which are disposed within the heating compartment and located adjacent to limited portion of the article, direct a stream of heated gas toward a marginal portion of this article. Supply means deliver a volume rate flow of heated gas to the shroud means, and discharge means remove a volume rate of exhaust gas flow from the heating compartment. The discharge means is constructed and arranged to provide a volume rate of exhaust gas flow from the heating compartment which is greater than the volume rate of heated gas flow supplied into the shroud means.

Abstract: Method and apparatus for making reclosable bag material and wherein a continuous length of preformed, flat bag wall web of multibag width is continuously run along flat stationary supporting surface. A plurality of continuous length fastener profile strips are joined into corunning assembled relation with the web on the surface. The strips are guided to retain their longitudinal running positions on the web. Bonding fusion energy is applied by way of openings in the surface and through the web toward the base surface of each of the fastener strips.

Abstract: Apparatus for forming a disc envelope from a prepunched, flexible, plastic blank having two sections connected at the heads thereof and containing a drive hole at the same location in each section. The drive holes are located on respective hubs which are located at the same position on respective folding plates. The end edge of a mandrel is pressed against the blank in the area between the two sections while the folding plates are moved from a horizontal to a vertical position pulling the drive holes taut on the hubs and thereby locating the center fold between the two sections of the blank flap folding apparatus and sealing apparatus are attached to and swing into operating position with the respective folding plates to form the side flap folds and seal the folded flaps.

Abstract: In the manufacture of plastic bags having interlocking profiled extrusions for the closure, the extruded plastic profiles are applied to a moving web of film immediately after extrusion of the profiles. The profiles are fused to the web on a first section of a fusing/cooling arcuate plate-like support member. Thereafter, the web is moved to a second cooled section of the arcuate plate-like support which is maintained at a temperature to allow the profiles to freeze to the web. The moving web of film is maintained under tension so that contraction of the film upon release compensates for the contraction of the locking profile as it cools to prevent puckering of the web. The locking profiles are applied to the web in an in-line process, which includes folding and heat sealing the moving web of film to form plastic bags.

Abstract: A device for applying seal tape to sheet-like material, wherein an adhesive tape is fed together with a portion of the material in a feed direction and pressed between a pair of opposed rollers, comprising: a machine body; a fixed arm projecting substantially horizontally from the machine body; a common roller freely rotatably mounted at the distal end of the fixed arm, an operating position for other rollers being defined by operative engagement with the common roller, the material and the tape being pressed between rollers in the operating position; a first movable arm extending generally across the feed direction with a first positionable roller at the distal end thereof, the first movable arm being pivotally mounted for movement of the first roller between the operating position and a first stand-by position; a second movable arm arranged generally along the feed direction with a second positionable roller at the distal end thereof, the second movable arm being pivotally mounted on the machine body for mo

Abstract: Two rectangular rigid foam boards are supported horizontally above and below an elongated horizontal heating blade which extends laterally across the width of the boards. The heating blade is supported for vertical floating movement for uniformally heating and softening the opposing side surfaces of the boards while the boards are fed between horizontal driven pressure rolls. The rolls cooperate with the blade to heat-fuse or weld the boards together and form a laminated foam core assembly. The foam core assembly is planed to a precision thickness and then bonded by adhesive to facing sheets of preselected materials. The temperature of the blade is sensed and controlled according to the speed of the pressure rolls and the pressure applied by the rolls during the heat-fusing operation.

Abstract: In the manufacture of packing containers from laminated material contact between the inner layer of the material and the contents is avoided by doubling up the cut edges present in the packing container. It has proved to be difficult to perform a secure folding and sealing of the folded edge without damage to the material, since the outer, water-tight layer of the material consists of very thin, heat-sensitive thermoplastic. This difficulty is overcome by carrying out the folding and sealing of the edge of the material web gradually while at the same time supplying heat or glue. By supplying the sealing-promoting agent as late as possible during the course of folding, damage to the material as well as to the folding arrangement is avoided.

Abstract: An apparatus for pressing and steam curing a wood-particle mat to produce a wood-particle board includes a pair of pressing belts which are arranged above each other at a distance to define a gap therebetween within which the wood-particle mat is conveyed and shaped. Along its passage through the pressing belts, the wood-particle mat is first moved along a compression zone in which the gap is gradually reduced and then passes along a sizing zone. Cooperating with the pressing is a steam injection unit which includes a steam supply channel system and a steam discharge channel system. Both channel systems border on the pressing gap and are provided with nozzle bores extending towards the gap. Via the supply channel system, steam is injected along the compression zone in direction of the wood-particle mat while the discharge channel system which extends at least along a downstream section of the sizing zone is provided to collect and eventually to discharge steam.

Abstract: For use in the prepressing of laminated safety glass in which glass-plastic assemblies are sealed in individual plastic bags, a rectangular heating oven having a bottom wall provided with a longitudinally extending slot, a plurality of portable racks, each rack being provided with a solid base operating slot in the bottom wall of the oven and with a plurality of horizontal shelves positioned in spaced relation one above the other for supporting individual assemblies, the shelves being pivotally mounted and movable to a vertically inclined position to permit the placement of one of the assemblies on the next lower shelf or its removal therefrom. Each rack is provided with means for creating a vacuum in the associated plastic bags to withdraw the air therefrom as well as from between the laminations. Means are also included for advancing the racks through the oven in end-to-end abutting relation to close the slot and provide a substantially closed heating chamber in the oven.

Abstract: To relieve stresses in a plastic weld which may weaken the weld and increase its susceptibility to solvent-induced crazing or cracking, forces are applied to the weld zone (the interface between welded parts) after it has cooled to solid condition, but preferably when it is at a higher temperature than the regions of the parts adjacent thereto, which forces are higher than the yield strength of the material at the weld zone and lower than the yield strength of the material in the regions of the parts adjacent to the weld zone. The forces thereby cause yielding or plastic deformation which effectively relieves certain thermally induced stresses in the weld. Tensile stresses in the weld are thereby relieved, to reduce susceptibility of the weld to solvent-induced crazing or cracking.

Abstract: An apparatus which successively and incontinuous action ensures the winding of bands from skeins, the retraction of the unwound bands, the drying of the retracted bands, and the winding by predetermined lengths, with checking of the quality of the possible variations of the lengths.

Abstract: A hand held, trigger operated, adhesive hot melt gun slidably mounts a base plate parallel with the gun axis with the plate spring biased forwardly in the direction of a hot melt adhesive discharge nozzle at the end of the gun remote from the trigger. An L-shaped extrusion tip carried by said nozzle includes a series of small diameter holes forming a vertical array within an upright leg which leg contacts an edge of a panel during sweep of the extrusion tip across the edge to deposit linear beads of melted adhesive thereon. The band, which may be mounted within a magazine on the base plate, feeds across the back edge of the extrusion tip to contact the adhesive coated panel edge downstream of the adhesive application point at a point where it is tacky. A spring biased pressure roller mounted to the base plate or otherwise presses the band against the tacky adhesive at this point during relative sweep of the apparatus along the edge of the panel.

Abstract: A heat sealing machine for joining a battery casing and battery cover selectively operable in either a heating mode or a bonding mode comprising a battery casing station, a battery cover station and a battery casing/cover heater station operatively supported on a machine support frame, the battery casing station including a substantially horizontal support member to support the battery casing, the battery casing/cover heating station including a heater support frame movable between a first and second position pivotally mounted on the machine support frame having a casing/cover heater mounted on one end thereof and a counter balance mounted on the opposite end thereof, the battery cover station including a battery cover support frame movable between a first and second position pivotally mounted on the machine support frame having a battery cover support to support the battery cover pivotally attached to one end thereof and a counter balance mounted on the opposite end thereof, the machine support frame includi

Abstract: Apparatus and methods for heat sealing thermoplastics strap material comprising a portable tool adapted to receive two sections of strap material which are to be welded together and having a heating element, means for moving the heating element between the straps and a battery source for supplying heating current to the heating element. A control circuit detects the battery voltage on load, and a drive circuit controls the movement of the heating element between the straps, to control the speed of the heating element in dependence on the detected voltage level, to compensate for decreasing battery voltage. The battery source is mounted in or on the tool housing for portability.The heating element is mounted on a carriage assembly mounted for reciprocal motion between the two straps and driven by an electric motor.

Abstract: A process and apparatus for the production of laminated sheath cables having improved close contact between a laminated tape layer and the core of the cable. The tape is longitudinally wrapped around the cable with portions of the tape overlapping. The assembly is then heated and passed through a set of pressing rollers disposed at a single pressing position. The rollers are at least three in number. The arc length of each roller is determined by dividing the total outer circumference of the assembled tape and cable core by the number of rollers.

Abstract: Improved process installation (10) for double floating transport and processing of substrates (30), consisting of successive transporters (18) with process slots (28) positioned in between and tape (80) as transporting means for said substrates (30) and whereby tensioning means (24), (96) and (104) prevent an unallowable deformation of the transporters (18) and tape (80) during the processing with accompanying heat development.

Abstract: A process for producing a strip (4) of corrugated cardboard by gluing one or more sheets (8, 10) of single-face corrugated cardboard and a sheet (6) of covering paper.At least the corrugations of the upper sheet (10) are heated by means of an infra-red radiation panel (40), after the glue has been deposited on them in the gluer (1) and before the sheets come in contact with one another in the double-face machine (2).

Abstract: A visible file pocket (100) having a laminar central web (101) and front and back, lower and upper pocket tips (102-105) for receiving the lower and upper edges of documents to be supported thereon and wherein the upper edge (108) of the file pocket (100) is provided with a transversely extending hinge pin receiving bore (109) adapted to receive a hinge pin (110) and laterally projecting hinge elements (112).

Abstract: An apparatus and process for improving the method of joining abutting carpet seams with an underlying reinforced adhesive tape. The apparatus comprises a flexible elongated backing of non-stick heat reflective material and includes an adhesive tape guide and heating iron attachment point at one end. The apparatus and iron are pulled along a carpet joint as a unit, melting the adhesive portion. In another embodiment the heater is built in to the apparatus to reflect heat down onto the tape or up to the tape.

Abstract: An apparatus and method for dispensing carpet seam tape below and centered with respect to juxtaposed edges of adjacent carpet sections. The apparatus includes a tape holding container having a tape discharge passage. The container is mounted between the juxtaposed edges of adjacent carpet sections and operatively moved in a direction substantially parallel to the juxtaposed edges of the adjacent carpet sections. As it is moved, the dispenser directionally dispenses the tape through the discharge passage centered below the juxtaposed carpet edges. A trailing plate is detachably secured to the tape holding container in alignment with the discharge passage, so that the tape is dispensed across the trailing plate. The juxtaposed edges of the carpet sections are then pressed into bonding engagement with the adhesive tape which is supported on the trailing plate.

Abstract: For anchoring carpeting such as of the artificial turf type, or the like, to other such carpeting or to an anchoring device, scrim carrying separable fastener means in the form of an extruded strip having an attachment flange along one edge engaged with one face of a margin of the scrim and resiliently flexible rib and groove fastener profile structure extending longitudinally along an opposite edge of the strip and adapted to be interlocked with complementary fastener profile structure. A bonding ribbon is engaged with the opposite face of the scrim margin and is bonded to the attachment flange through openings in the scrim margin. A method of making the carpet anchoring assembly is adapted to be practiced in apparatus which provides for extrusion of both the fastener strip and the bonding ribbon toward the scrim margin and effecting thermoplastic bonding between pressure rolls as the scrim moves along a continuous fabrication path.

Abstract: An infrared heat tunnel with hot air circulation for heat shrinking wraparound labels on containers which are moved through the tunnel in an upright attitude on an open weave conveyor belt. The infrared heating is by electrical strip heaters along the sides of the tunnel and air is blown by blowers across these heaters to impinge on the sides of the containers. The air is drawn down through the conveyor belt since the inlet to the blowers is from beneath the conveyor. A vertical air curtain along each side of the first half of the tunnel is adjustable in length to effectively delay the skin shrinkage of the film-foam material of the labels in order to get wrinkle-free shrinkage of the film and underlying foam about the container wall and heel areas without bottle rotation.

Abstract: There is depicted and claimed "on demand" apparatus and method for producing air-cushioning material for end-user manufacture. There are two arrangements and both provide economy of apparatus, space, labor and materials. Two thermoplastic film strips are carried from roll storage means to this air-cushioning forming means whereat the webs of film are locally heat-sealed together. A first film is fed to a heated roll whereat this film is heated sufficiently to be thermoformed on a cooled roll with cavities formed therein. These cavities are manifold-connected to a source of vacuum which draws the heated film into the formed cavities. The second strip of film is fed to another heated roll having a resilient covering material with thermoconductive metal powder as a substantial component, thus providing sufficient thermoconductivity and resilience to heat-seal or weld this second film to those areas around the cavities formed in the first film.

Abstract: In a method of sealing separate flat lids (16) on to a series of generally rectangular tray-like containers (11), particularly containers which are coated with a polyester such as polyethylene terephthalate for heat resistance, the containers are moved continuously along a line while a lid (16) is positioned with its margin in contact with a peripheral flange (26) on each container, marginal side portions (25) of the lid and/or the side portions of the container flange are bent, e.g. by profiled strips (23, 24) acting as ploughs, to form a V-shaped recess between them, hot air is directed into the recess, e.g. from elongated nozzles (31, 32), to activate adhesive within the recess and to heat the side portions (25, 26), after which the side portions are pressed into contact to seal them together, e.g. by profiled strips (33, 34) and pressure rollers (35, 36). The movement of the containers (11) is thereafter changed, e.g. by turning the line of movement through 90.degree.

Abstract: An apparatus for clamping a plastic fitting against a plastic pipe and for holding them together with a predetermined clamping force includes a carriage and guide rods for guiding the carriage in vertical motion above a fixed pipe support. A frame is fixed with respect to the pipe support, and first and second toggle links are pivoted to the carriage, to the frame and to each other in such a way that the links can achieve an aligned position in which the carriage is in its lowermost location. Mechanical interference is provided to prevent the toggle links from going significantly past the dead center position represented by the alignment. A receptacle is resiliently supported below the carriage for holding the plastic fitting, and a lever is provided for rotating one of the toggle links. The connection of the toggle links to the frame is vertically adjustable with respect to the frame, in order to adjust the degree of downward force placed on the plastic fitting.

Abstract: A heating device for corrugated cardboard in a corrugated cardboard pasting machine, comprising several heating plates spaced in feeding direction and covering the maximum width of the corrugated cardboard strip while being adapted to be connected to a source of heat via a control device and against the upward facing heating surface of which the cardboard is guided under load by a weighting belt and/or compressed air, with two or more separate heating plates arranged side by side transversely of the direction of movement of the corrugated cardboard in at least one section and adapted to be separately heated by means of the control device.

Abstract: A method and apparatus for attaching plastic ends to plastic or plastic coated rims of container bodies by heating the ends, to soften the material of the rims, and then spin welding the ends on the bodies.

Abstract: A universal hot air nozzle and seal bar with adjustable cam for use on an apparatus for forming and assembling tubular thermoplastic sleeves. The apparatus has a circumferentially movable turret with a plurality of mandrels forming work stations thereon. At the work stations each mandrel has a nozzle and seal bar and the sleeve is wrapped around the coacting mandrel with the vertical edges of the sleeve being disposed in overlapping relation with heat being applied by a stationary heat nozzle to the overlapped edges in coaction with a stationary seal bar being subsequently advanced to the heated overlapped edges with preselected pressure to heat-seal such edges together. The improvement includes cam-actuated telescoping mounting means in the form of a slidable telescoping shaft within a slidable telescoping shaft upon which the seal bar is mounted enabling the seal bar to selectively contact the sleeve with preselected pressure.

Abstract: A gravure printing cylinder is formed by fitting a printing sleeve over a core roll via a layer of a hotmelt adhesive. A gravure printing surface with ink-retaining cells is formed on the printing sleeve either before or, preferably, after the mounting of the sleeve on the core roll. For assemblage of the printing cylinder the hotmelt is applied in the molten state to at least part of at least either of the opposed surfaces of the printing sleeve and the core roll. Then the printing sleeve is placed over the core roll, preferably while both sleeve and roll are being heated. The printing cylinder can be readily disassemblaged by remelting the hotmelt layer. Also disclosed herein is an apparatus for the assemblage and disassemblage of the printing cylinder, including a roll holder for holding the core roll in an upstanding attitude while the core roll is being heated by a heating medium circulating therethrough.

Abstract: The present invention relates to a method and apparatus for laminating two webs of corrugating medium to produce a composite corrugating medium for the manufacture of corrugated fiberboard. The method essentially consists of the steps of (a) applying a coat of a water-soluble adhesive onto one side of at least one web of a first and second corrugating medium; (b) conveying the first and second corrugating medium over the surface of a first heating cylinder such that the water-soluble adhesive is between the first and second corrugating medium to join them together into a loosely bound composite corrugating medium, wherein heat is applied to one surface of said composite corrugating medium through the first heating cylinder; and (c) passing the opposite surface of the composite corrugating medium to a second heating cylinder to subject the composite to a second heating step. The present invention contemplates an apparatus for carrying out this invention.

Abstract: This invention relates to machines for heating and joining thermoplastic resin sheets and more particularly relates to a portable machine which fuses together the overlapping edges of large stationary sheets as the welding machine travels along the overlapping edges. The machine is moved along the opposed edges of the sheet at a velocity which is changed so that the velocity is substantially proportional to the instantaneous temperature of the heat source. The machine is therefore accelerated or decelerated in accordance with the selected velocity change algorithm which is exponentially in the preferred embodiment.

Abstract: A portable pipe fusion apparatus for attaching plastic side wall fittings e.g. tees, branch saddles to a plastic pipe of selected composition. This apparatus comprises a base plate with means to rigidly clamp the base plate to a pipe main. Two parallel, spaced support rods attached to the base plate at one end, and to a support plate across the other two ends. Movable clamp means guided to slide along the support rods with the axis of movement intersecting the axis of the pipe main. The movable clamp means is adapted to be attached to and hold various of the side wall fittings rigidly, so that the axes of the fittings intersect the axis of the main pipe. Drive screw means held in a quick release split nut means on the support plate, will force the movable clamp in the direction to contact the transverse pipe main. A hydraulic load cell is interposed between the drive screw and the movable clamp with an indicator which continually reads the force being applied between the moving clamp and the pipe main.

Abstract: A flyleaf heat sealer for adhering a flyleaf having its inner surface pre-coated with hot melt or heat sensitive adhesive to the exposed outer surfaces of the end sheets of a book block insert, includes means for engaging and transporting a book block insert and the flyleaf folded therearound, means for directing a flow of air heated to a temperature adequate to melt the adhesive against and impinging upon the outer surfaces of the flyleaf, and means for pressing and cooling the flyleaf and book insert between them and removing heat from the flyleaf and book block, and thus curing and hardening the adhesive.

Abstract: The present invention concerns the making of printing plates, particularly for litho printing. The invention involves assembling a montage of a plurality of individual films for exposure of the films to a printing plate. In order to assemble the montage a transparent, dry heat-sensitive adhesive coating is used on a carrier sheet and the films are bonded to the carrier sheet by this adhesive on the appropriate application of heat. The heat may be applied by a heating device according to the invention using a transistor as a heat source. Alternatively the assembled montage may be placed in a vacuum cabinet according to the invention, subjected to a vacuum to hold the films and carrier sheet together, and again have heat appropriately applied so that the adhesive bonds the film and sheet together. The heat may be generated by an HF source.

Abstract: Apparatus is disclosed for the bonding together of two similarly shaped articles made of dissimilar thermoplastic materials, utilizing oscillator motion between the two articles combined with an external heat source to generate sufficient heat to form a hermetic seal therebetween.

Abstract: A device for hot air welding, comprising a nozzle for activation of a sealing area around an opening at the inside of a hollow body. The nozzle has a slot device for directing a flow of air out through the opening for activating the sealing area when the nozzle is in the operative position thereof. Means are arranged for cooling the hollow body externally around the sealing area. There are also provided means for recirculation of the gas.

Abstract: The end face of an optical fiber is urged against the highly polished surface of a disk as a laser beam is directed toward the disk to heat the end face above its softening temperature and cause it to conform to the contour and finish of the highly polished surface. A termination ferrule may be simultaneously mounted on the fiber optic cable with a heat bonding agent, using as a heat source either the laser beam or an auxiliary heat source. A hand-held, gun-type unit with a built-in disk and triggered laser can be used to polish and terminate optical fibers in the field.

Abstract: Welding surfaces of thermoplastics material together by depositing a continuous layer of molten thermoplastic welding material over adjacent areas of the surfaces to be joined, the deposition of at least part of the molten welding material being effected with a smearing action in which the material is subjected to shear forces acting across the surfaces, and allowing the deposited material to solidify.

Abstract: A combination heat applying and roofing material unrolling apparatus is provided. The apparatus includes a frame assembly and a heating support unit. Connecting means interconnects the frame assembly and a roll rod which engages a roll of the roofing material. Guide means having slots are joined to the connecting means. The slots receive a common pipe of the heating support unit. A plurality of burner elements are connected to the common pipe to emit flames for softening an adhesive layer of the roofing material. The common pipe is adjusted laterally and rotationally with respect to the roll of roofing material to permit application of different heating temperatures to the adhesive layer as the roofing material is unrolled.