Abstract: An apparatus (10) applies adhesive tape to workpieces. A nest plate (52) receives a workpiece (20). A clamp plate (53) holds the workpiece (20) relative to said nest plate (52). A stage (73) holds a leading portion of a continuous tape (12). A first mover (58) moves the nest plate (52) and the workpiece (20) relative to the stage (73) and the tape (12) to engage the workpiece (20) with the leading portion of the tape (12) and affix the leading portion of the tape (12) to the workpiece (20). A second mover (45) moves said nest plate (52), the workpiece (20) and the affixed portion of the tape (12) relative to the stage (73). A sever mechanism (62) severs the affixed portion of the tape from a remaining portion of the tape (12). The clamp plate (52) releases the workpiece (20). A third mover (87) moves the workpiece (20) and the affixed portion of the tape (12) relative to said nest plate (52) to remove the workpiece (20) from said nest plate (52).

Abstract: A pog press which utilizes a base and a lid with the lid being movable relative to the base. Mounted within the base is a pog receiving pocket with a pog pocket being mounted within the lid. The pog pocket and the pog receiving chamber are to interconnect when the lid is closed on the base. A sheet material pattern is to be connectable with the pog pocket and when the lid is closed on the base, a cutting blade severs the sheet material pattern with the severed segment to then conform to the shape of the pog pocket. The lid includes a transparent window over the transparent pocket to permit visualization of the interior of the pog receiving chamber when the lid is in the closed position with the base.

Abstract: An applicator for dispensing tape is disclosed. The applicator comprises a shell and a cover that is used as a knob for moving an instrument of a cutting tool for cutting the tape. In operation, the cover is rotated and moved in a counterclockwise direction to cause one of its ends to find its way into a passageway allowing it to contact a lever member which, in turn, contacts an arm member of the cutting tool thereby causing the adhesive tape to be severed thereat. The applicator is shaped, contoured, and sized so as to be manipulated by a single hand of a user and the cover member is mechanized so that the applicator only exposes the tape to the outside environment during the usage of the tape and, thereby, retards the tape from being subjected to contaminants.

Abstract: An apparatus for applying a length of adhesive tape from a supply of adhesive tape along the length of a leading edge of a roll of web material includes a cutting mechanism for cutting the length of web material to form a length of leading edge on the roll of web material. An application mechanism of the apparatus is configured to remove adhesive tape from the supply of adhesive tape and apply adhesive tape along a length of the leading edge of the web material. A take-up mechanism removes a liner from the adhesive tape during the application of the adhesive tape to the leading edge. A buffing mechanism contacts the adhesive tape applied along the length of the leading edge to insure contact between the adhesive tape and an outer layer portion of the roll of web material that is directly adjacent the leading edge. A cutoff mechanism cuts the adhesive tape to form the length of adhesive tape along the leading edge of the web material.

Abstract: The invention relates to a method and an apparatus for applying flat punched elements in the desired position to the surface of a carrier material, the elements being present in multiple copies on a sheet. The multiple copies are fed to an applying device and positioned therein. At the same time as individual elements are separated out or punched, these elements are fixed in position with respect to the carrier material.

Abstract: A seal bar for cutting and sealing plastic films about wrapped products comprises a laminated seal bar arrangement in which seal bar halves with a cutting knife, heating element and temperature sensor therebetween are adhesively secured together with a heat cured epoxy. The seal bar halves are preferably extruded members. A fixed temperature controller maintains the operating temperature of the seal bar below the melting temperature of the adhesive epoxy to prevent delamination from occurring.

Abstract: A heated film die for the fabrication of plastic containers such as bags, envelopes, balloons, bladders, etc.. The die is an integrated sectionalized structure having independent, adjacent, electrically heated, temperature regulated, die sections which are maintained at different temperatures, for performing, simultaneously, two or more of operations such as, cutting, staking and forming, in plastic container fabrication. A lower temperature heat sink between adjacent die sections provides thermal isolation between the die sections.

Abstract: A tape dispenser for adhesive tape (36) comprises a housing, carriage means (22) within the housing for mounting a reel (37) of tape (36), an aperture (51) in the housing through which the tape is arranged to be dispensed on to a surface, applicator rollers (27, 25) within the housing movable to apply the tape to said surface, and a cutter blade (46) within the housing to sever the tape. The cutter blade (46) is retracted when the applicator rollers (27, 25) apply the tape to said surface. At the completion of the applicator the applicator rollers (27, 25) in their withdrawal cause the tape (36) to be presented under tension to the cutter blade to be severed thereby. A push-button (31) controls operation of the dispenser. Depression of the push-button (31) causes the whole carriage (22) inclusive of the tape reel (37) to be displaced towards the application surface.

Abstract: A sterile containment welding device for plastic tubes comprises a pair of side by side spaced tube holders. Each of the tube holders includes a clamp base and a clamp lid. A pocket is provided in each clamp base extending completely across the clamp base so that a plastic tube could be inserted into the pocket and clamped in the holder when its clamp lid is moved to a closed position. Pockets of the side by side tube holders are alignable with each other to permit a plastic tube in one of the holders to be welded to the plastic tube in the other of the holders. A tube locating member is movably mounted at the end of each pocket in the space between the holders. The tube locating member has a wall disposed in the space beyond the pocket for positioning its plastic tube in the proper position for the later welding step when its tube is moved into contact with the walls.

Abstract: A pair of hollow plastic tubes are welded together by mounting each tube in the clamp jaws of a holder in a bent condition to form the U-shape. A structural element is utilized to create a space between the bight of the U-shape and the holder. The bent tubes are disposed toward each other. A tube section separating member is moved into contact with the bent tubes and through the space between each bight and its holder to create a set of two tube sections from each bent tube. A tube section from one set is aligned with a tube section from the other set and the aligned sections are welded together. The structural element may be a weld seam resulting from a prior welding.

Abstract: In a process and apparatus for wrapping up articles, particularly for wrapping up of electrical windings applied to bobbins with a tape, a tape is drawn from a tape reel mounted on a reel holder. The apparatus includes a deflecting and measuring device for determining a tape tension during the removal and wrapping up process, a contacting and application station for the tape which is self-adhesively applied to the bobbin winding, a winding station provided with a pendulum part and a control unit having at least one computer and a number of control devices. The control unit is used for forming controlled and adjustable signals for the tape winding and tape speed, for the tape tension and for the direction of deflection of the pendulum part depending on an instantaneous running direction of the tape. The bobbin with the winding is interchangeably fitted onto a fit-on mandrel.

Abstract: A plastic tube is cut into two sections which are sealed closed by a sterile method wherein the tube is loaded into two clamping jaws which flatten the tube. The tube is cut through the flattened section and the cut ends are heated to their molten state. A wafer having wings is located between the cut ends with the wings penetrating the lumens to create an internal plug as the wings force the molten material inwardly. The plugs add to the strength of the resultant seal. If desired, the molten ends are pressed into a cavity which is cooled to a temperature below the molten temperature to seal the ends. The tubes are then removed from the cavity. When it is desired to connect individual tube sections the two tube sections are placed in clamp members in axial alignment slightly spaced from each other. The ends of the tube sections are melted by a melt/wipe process and the tube sections are then pressed into contact with each other to be welded into an integral tube.

Abstract: Plastic tubes are welded by placing a pair of tubes in a pair of aligned holders with each tube folded toward itself. A wafer is movably mounted in the gap between the tubes and is heated to cause the ends of the tubes to melt without actually cutting through the tubes. The melted ends of opposed tubes can be pressed into contact with each other to form a welded connection. In a variation a pair of cutting blades cut the folded ends of the tubes and the cut ends are then melted by a wafer and subsequently pressed into contact with each other.

Abstract: Plastic tubes are welded together by placing each tube in a nest which includes a pair of grooves and an anvil centrally located between the grooves. Each tube is positioned in the grooves around the anvil for being juxtaposed the other tube. A wafer of movably mounted to move to the gap between the anvils so as to heat the ends of the tubes and melt the tubes without actually cutting through the tubes. The melted ends are then joined together so that the two tubes are thereby connected with one section of each tube being in flow communication with a corresponding section of the other tube.

Abstract: A process for sterile entry/exit into a closed system permits safe addition of reagent/nutrient/process modules, etc., removal of biological samples or depleted process modules such as filters, etc. all without exposing the operator to possibly dangerous materials such as blood and without endangering the contents of the system such as in cell-culturing. A novel welder and process is disclosed to illustrate the process.

Abstract: The invention provides a heat-bonding blade and a heat-bonding apparatus capable of heat-bonding thermoplastic resin sheets, in particular non-woven cloth sheets of thermoplastic resin, with or without heat-cutting these sheets. A first-type heat-bonding blade intended for heat-cutting/bonding has pressing members provided on both sides of the blade. The distance between the lower end of each pressing member and the edge of the blade is determined such that the pressing members lightly press the sheets of the thermoplastic resins when the edge of the blade has pressed into the sheets.A second-type heat-bonding blade intended only for heat-bonding the sheets is provided with a contact surface on the edge thereof. The contact surface is embossed so as to have a multiplicity of emboss projections. This type of heat-bonding blade may be formed by removing the pressing members from the blade of the first type and providing an embossed contact surface on the edge of the same.

Abstract: A tape dispenser for taping 90.degree. box corners includes a housing (12-20) for supporting a roll of tape to be dispensed therein, a first guiding member (30) for aligning the tape from the roll along the 90.degree. box corner to dispense a predetermined length of tape from the roll, a second guiding member (32, 34) for guiding initially the tape onto each side surface of the box forming the 90.degree. corner, and a third guiding member (42) for subsequently applying the tape onto the side surfaces of the box. A pair of blade carrying brackets (52, 54) is mounted for reciprocating vertical movement relative to the housing. A holder (58) is provided for receiving the blade carrying brackets for the reciprocating vertical movement therein. A cutting blade (56) is mounted to the lower ends of the blade carrying brackets. A cam actuating mechanism (76) is used to drive the blade carrying brackets downwardly to cause the blade to cut the tape which has been dispensed to the predetermined length.

Abstract: Heated seal bars are located on opposite sides of an elongated strip of heat sealable material adapted to be advanced with a step-by-step motion. When the strip dwells, the bars are shifted linearly inwardly into engagement with the strip to form a heat seal and then are retracted linearly a short distance away from the strip to permit the strip to advance through its next step. If an abnormal condition prevents the strip from advancing, the bars are retracted linearly to a parked position in which the bars are spaced a substantial distance away from the strip in order to prevent the heat radiating from the bars from damaging the stopped strip.

Abstract: In a process for the welding of plastic films lying flat, one on top of the other, the plastic films are brought into contact with a heated cutting edge and hot-tool welded. Two-layered or multilayered composite films of different chemical composition are used for the welding; for example, one composite film can be an opaque, colored or uncolored layer, on which there is arranged a transparent sealing layer comprised of a propylene-ethylene copolymer or a propylene-ethylene blend. The sealing layer of the opaque composite film is welded directly to a sealing layer of a second, transparent composite film.

Abstract: System for cutting and sealing overlapped film for packaging objects by a blade projecting between heated bars, with means movable along slots in the blade to adjust the blade projection.

Abstract: A method and apparatus for laminating flexible magnetic segments onto the plastic substrates, such as during the in-line production of shower curtains and/or curtain liners. The apparatus, which is configured for use with typical shower curtain and/or shower curtain liner producing machines, includes a substantially planar upper work surface for receiving the plastic substrate and at least one applicator unit located adjacent the work surface which automatically laminates a flexible magnetic strip and a plastic cover patch onto the curtain. Three applicator units are preferably utilized, with one such unit substantially aligned with the center of the curtain and the remaining two units being located along the longitudinal edges thereof. In operation, a thin, flexible plastic film is unwound onto an assembly table whereupon it is stopped at a predetermined position.

Abstract: A die for use in heat welding a plastic motif to a textile base as a first welding ledge extending along a first, substantially planar face of the die, the welding ledge having a coplanar welding surface lying at least 4 mm. above the die face and having a cutting edge projecting above the welding surface to a height of at least 0.3 mm. The width of the welding surface is not less than 0.5 mm and is preferably between 1.5 mm and 3 mm. The die also has further welding ledges on which the welding surface extends the full width of the ledge. Each welding surface serves to weld the plastic material to the textile while the cutting edge severs excess material from the plastic motif along a welded line.

Abstract: An apparatus for cutting and heat sealing a pair of overlying heat-sealable panels together comprises a conveyer for moving a pair of superimposed webs of panel material along a linear path and into a cutting and sealing station. A combined cutting and sealing die assembly includes a cutting die for cutting the panels out of the webs and a sealing die for sealing peripheral edges of the superimposed panels together. A heater element is mounted on each of the dies to heat them to their respective cutting and sealing temperatures with the dies being thermally insulated to prevent heat transfer therebetween. A plurality of spring clips attach the dies together to permit thermal expansion of the cutting die relative to the sealing die.

Abstract: The device comprises two paddles 1 each one of them being connected to a bar 3, the extremities of which are placed within a cam track. The cam track is formed in the surface turned towards the working zone of support 18 which is located corresponding to both the lateral extremities of the device. The motion of the bars 3 and therefore of the paddles 1 along the cam track 8 which has a rectilinear section 8' and a section of circular sector 8", is determined for each bar by a pair of connecting rods 7 which has a slit 7. The two ends of the bars 3 close to the extremities are placed in the slit. The four connecting rods 7 rotate synchronously, the rods corresponding to the same paddle being in the same direction, the rods corresponding to the same side of the device being opposite to the other.

Abstract: A taping apparatus for adhering taping members to a lead frame, comprising: a die having a punch for cutting a heat-adherent tape to form individual taping members. The taping member is moved and pushed against a surface of a heater block on which a lead frame is rested and heated, so that the taping member is heated and adhered to the lead frame. The tape is intermittently fed along the passage in synchronization with an operation of the die, and before punching slack is provided in the tape.

Abstract: An apparatus for sealing and severing a web of film. The apparatus includes a first jaw located on one side of the web of film and a second jaw located on a second side of the web of film. The first and second jaws cooperate to grip the web of film. Located within the first jaw is a heater member for sealing and severing the web of film. The heater member is secured so that the time and/or pressure at which the heater member engages the web of film may be varied independent of the first jaw.

Abstract: This invention is generally accomplished by providing continuous self-adhesive strands of elastic to a substrate having retractable supports extending therefrom. The retractable supports in a convex pattern are contracted with the self-adhering elastic and the substrate bearing the elastic and supports is brought into contact with the web to which the elastic is to be transferred. The series of supports around which the elastic contacts are forced to retract as the self-adhering elastic is pressed against the web causing the elastic to transfer to the substrate thereby creating an elastic band on the substrate. In a preferred form the substrate is fed two strips of self-adhering elastic that are applied on each side of a series of a convex pattern of pins and then pressed together around opposing sides of the convex pattern of pins to seal the elastic to itself and sever the elastic, creating a contoured closed loop around the pins.

Abstract: The present invention is a method and apparatus for making a diaper having one or more elastic margins. The diaper uses for the entire moisture permeable backing sheet an elastomeric material of the type that is heat unstable and relatively inelastic in its unshrunk form and stable and relatively elastic in its heat shrunk form. Diapers made using one of these materials as a backing sheet can be conventionally assembled. After assembly, the marginal areas, which may be either or both of the transverse and longitudinal margins, may be heated to a sufficient temperature for shrinkage to occur in the backing sheet. This shrinkage will only occur when the backing sheet is unrestrained. The method provides for the maintenance of longitudinal tension in the central portion of an end-to-end assembly of diaper units while relaxing the edge tension on the units.

Abstract: A method for applying a protective tape on a wafer and cutting it out to the shape of the wafer in the process of manufacture of integrated circuits and the like, and an apparatus for use in carrying out the method. The method enables the protective tape to be applied on the wafer without allowing intersurface inclusion of air bubbles and to be accurately cut along the perimeter of the wafer. Any dimensional change with respect to the wafer can be properly coped with.The protective tape, as drawn out from a winder shaft, is applied by means of an application roller on the wafer which is supported and fixed in position on a transfer table.The tape is cut along an orientation flat of the wafer by a subcutter which is in movement integrally with the application roller. A main cutter positioned above the wafer is then lowered and caused to swivel, whereby the protective tape is cut along a circumferential edge of the wafer so that the tape on the wafer is cut out to the contour of the wafer.

Abstract: An auxiliary film is applied or fused to a slide fastener chain having a pair of intermeshing rows of coupling elements with an element-free space defined therein. The slide fastener chain is fed by a chain feeder along a feed path. The device for applying the auxiliary film includes an ultrasonic horn disposed above the feed path, a holder disposed below the feed path and movable toward and away from the ultrasonic horn, a stopper disposed in the holder and movable into the element-free space of the slide fastener chain, an anvil disposed in the holder and movable toward and away from the ultrasonic horn, and a feed roller assembly for supplying an elongate auxiliary film onto the anvil. A sensor roller is mounted on the holder for pressed engagement with the elongate auxiliary film, the sensor roller having a plurality of circumferentially equally spaced controlling elements.

Abstract: A method and apparatus for tacking together multipage forms having pin holes with the use of adhesive tacking tape.

Abstract: A seal bar including a clamped seal element for rotary side seal machines and, more particularly, to a thin ribbon-like seal element constituted of a metallic high-temperature resistant material for the concurrent heat sealing and cutting through of superimposed layers of a thermoplastic film material.

Abstract: A band or strap of thermoplastic material which has been placed around a package or article being wrapped is put under tension by means of a tensioning device. The connection apparatus for connecting overlapping ends of the thermoplastic band material is placed within the area of the band or strap under tension and is used to connect these overlapping ends together. The connection apparatus welds the overlapping ends of the strap together using friction by rubbing the lowermost end in a transverse direction with repsect to the longitudinal axis of the band or strap against the uppermost strap end by means of a vibrating or oscillating welding jaw. The welding jaw is driven by an internal battery-powered DC-motor. The connection apparatus is especially well suited for use with a separate tensioning device and can be used in lieu of previously used seal clamps or pliers, independent from a connection with an electric power network or a source of compressed air.

Abstract: Apparatus for thermally welding two layers together including; a first and second bar, wherein one of the bars presents a larger welding surface than the other bar; structure for reciprocally moving at least one of the bars relative to the other bar, in a first direction between an open position wherein the bars are disposed in spaced apart relationship so as to permit the insertion and withdrawal of said layers between the bars, and a closed position wherein at least one of said bars is adapted to apply heat and pressure to said layers for welding said layers together; and structure which reciprocally moves at least one of said bars relative the other bar in a second direction between two limit positions so as to present different portions of said bar having the larger welding surface for each successive weld of said layers to evenly utilize the entire welding surface of the larger welding surface over successive welds.

Abstract: A marking apparatus is disclosed for cutting a piece out of an adhesive tape and simultaneously attaching the same onto and individual slide fastener which has been found defective during the travel of a continuous slide fastener chain. The apparatus is operatively associated with a detecting device which controls the operation of an air cylinder so that a cutting punch is reciprocated toward and away from an anvil and a support mandrel.

Abstract: An apparatus for welding and cutting a film of single-layer or multi-layer synthetic material includes two jaws which are movable relative to one another. One of the jaws has a welding contact zone which includes a strip which has a groove of substantially v-shaped cross-section separating a pair of wings parallel to the edge of the corresponding jaw. The other of the jaws is equipped with a means for cutting the film which includes a wire of circular cross-section projecting relative to the edge of the jaw which supports it, so that the wire and the groove can interact with one another to make the cut as the weld is performed by the wings of welding strip.

Abstract: A pouch and a method and apparatus for forming an easy open pouch in a vertical form-fill-seal process wherein a pouch is formed from a sheet of thermoplastic film and a heat seal between pouches as they are filled serves as the top closure for the lower pouch and a bottom closure for the upper pouch, the easy open feature being provided by a U-shaped portion having a plurality of seal ribs, and a tear initiation notch.

Abstract: An apparatus and method for cutting and sealing belt loop ends includes sealing and cutting members disposed on opposite sides of a length of fabric belt loop material formed wholly or partly of a heat sealable material. The sealing and cutting members are urged together in a scissor-like fashion to cut the strip across its width. The members are also configured to compress regions of the strip adjacent the cut ends. At least one of the sealing and cutting members is heated and the heat is transferred from the members to the compressed region adjacent the ends to melt or soften at least a portion of the meltable material. The melted or softened material merges or intermingles with the threads of the fabric in the compressed regions and upon cooling hardens to effect a seal of the belt loop at the cut ends. The seal substantially prevents the fabric from unraveling during subsequent laundering and wear.

Abstract: The device comprises two paddles (1), each one of the paddles being fixed to a bar (3), the ends of which are located within a cam path (8) formed on the surface turned towards the working zone of support (18) located corresponding to both the lateral heads of the device. The motion of the bars (3) and obviously also of the paddles (1) along the cam path (8) which presents a rectilinear working section (8') and a portion of a circular section (8"), is determined for each bar by a pair of rods (7), each rod having a slot (7'). Two sections of the bars close to their extremities are placed within the slot (7') and all four rods rotate synchronously, the bars placed corresponding to the same paddle rotating in the same direction while the rods corresponding to the same head of the device rotating in the opposite direction.

Abstract: In a factory for producing rolls of pressure sensitive tape, a tab is applied to the end of such tape by a series of steps comprising: advancing a strip of tab material onto a work station; positioning a placement zone of such tape onto a temporary positioning zone of a workstation and onto the perpendicularly aligned strip of tab material so that the tape adheres to such strip of tab material; cutting off and discarding that segment of the tape forward of the edge of the tab; lifting the tape from its temporary positioning zone at the rearward portion of said workstation; advancing the combination of the strip of tab material and the tape laminated thereto so that on the workstation there is exposed the strip of material for the next tape; and cutting off the strip of tab material at the edge of the tape, so that the tabbed tape is liberated from the workstation zone. Such process can be practiced using either a hand held applicator or a bench mounted applicator.

Abstract: Reinforcement for strengthening sheets of paper and the like around binding holes. The reinforcement has a generally chevron shape with parallel opposing edges of similar length and contour. In one embodiment, the reinforcements are supplied in a precut from in which a plurality of the reinforcements are nested together along an axis with the opposing edges of adjacent ones of the reiforcements in close mating relationship with each other and no gaps or waste material between the reinforcements. In another embodiment, the reinforcements are cut in place from a sheet of adhesive backed reinforcing material and applied by a punch which also cuts the binding holes in the paper.

Abstract: A band or strap of synthetic material, for instance thermoplastic material, placed as a ligature around a package or article to be wrapped is tensioned and its ends connected together, for instance by friction welding, by means of a tensioning and connecting apparatus for connecting overlapping strap ends of synthetic or thermoplastic material. The tensioning and connecting apparatus comprises a clamping member or shoe for restraining or holding the innermost end of the band or strap, a connecting or friction welding device and a tensioning device in the form of a slotted wheel located subsequent to the connecting or friction welding device as viewed in the direction from which tension is applied. The connecting or welding procedure involves a transverse motion such as vibration or oscillation of the innermost, free end of the strap or band relative to the longitudinal axis of the strap.

Abstract: A process and apparatus is provided for cutting multiple plies of thermoplastic material having thickened sections, such as defined by cross-sections of matable parts of a zipper closure formed in the material, and for concurrently sealing the severed margins of the material which includes sealing the severed zipper closure portions thereof. The process and apparatus perform the operative steps of: first, preblocking the thickened material adjacent to the zipper closure portions of the material in areas thereof to be severed and sealed; then, applying heat and pressure to the thickened material and remaining sections of the material in those areas to render the material tacky and temporarily stick the multiple plies together in those areas; and, thereafter, contacting those areas of the material with a heated cutting and sealing element in order to sever all of the multiple plies and seal the severed margins thereof.

Abstract: An improved automatic tape cutter/sticker is disclosed. A first shell body has disposed thereon a compressible tube having a roll of tape disposed thereon so as to prohibit free wheeling of the tape. The first shell body is disposed within a second shell body having disposed therebetween a rotary cutting knife. Upon movement of the first shell body with respect to the second shell body, a rotary cutting knife is moved out of alignment so that the tape may be payed out. Upon removal of force from the first shell body, the rotary cutting knife rotates in the opposite direction thereby cutting the tape. Slots are provided in the first shell body to enable it to be quickly urged downwards while also allowing for closer presentation of the tape to an outlet slot in the second shell body.

Abstract: An apparatus for sealing a web of film including a heater member for melting a portion of the film to create side and chevron seals. A back-up bar is located diametric the heater member. The heater member includes two elongated heater bars and two wing heater bars.

Abstract: A method and an apparatus for wrapping a cushioning member, particularly a sun visor, with a web of wrapping material formed from two blanks, in which one blank is placed on one main surface of the cushioning member and the second blank is placed on its other main surface. Each blank forms a continuously protruding flange in the center plane of the cushioning member. The flanges are clamped between two opposed web electrodes, and the flanges are welded peripherally to each other by high-frequency welding in such a manner than an inward-directed weld bead is formed by the flow of material at the flange edges facing the member. After the termination of the welding process, that is, after the disconnecting of the high-frequency voltage, the flanges remain clamped between the electrodes, possibly with an increase in the clamping pressure.

Abstract: A device for connecting two layers of heat meltable material together comprises a toothed member which can be heated and pressed against a ribbed member with the layers of material therebetween. The toothed member includes three rows of teeth with gaps between adjacent teeth. Each row is separated by a gap thickness and the teeth have preferred widths. Thicknesses and lengths. The ribbed member has a pair of ribs that defines three grooves for receiving the three rows of teeth. Clearance is provided between the teeth and ribs while the teeth are bevelled to produce perforations in the heat meltable layers while firmly sealing the layers together around a periphery of each perforation.

Abstract: A packaging for filling materials which are capable of flow, comprises side and end walls of coated paper, cardboard or the like, which are joined by means of at least one sealing seam. Bending lines (7) are provided in the coated paper, cardboard or the like. So that the bending lines in such packaging remain undamaged in spite of a thin overall coating of plastics material on the paper web, even when processed in a manufacturing machine, it is provided that disposed in the region of at least some bending lines (7) is at lesat one plastics reinforcing strip (15) which engages thereover, such that the welding and contact surface (29) between the reinforcing strip (15) and the coated cardboard (61, 62) terminates from all sides at a spacing from the bending lines (7).

Abstract: Sealing device suitable for sealing bagging material containing, for example, produce, such as meat or poultry, to form a produce-containing bag having a seal at one or both ends, and being particularly adapted for cooking or defrosting the produce in a microwave oven. The device includes an ultrasonic sealing horn having a sealing surface, and a guide associated with the sealing horn for guiding material to be sealed into contact with the sealing horn. An anvil is provided for clamping the material against the sealing horn to facilitate the formation of a seal nugget upon actuation of the sealing horn. A bag clamp is pivotably mounted to the guide, and includes first and second spaced-apart arms.

Abstract: This invention is generally accomplished by providing continuous self-adhesive strands of elastic to a substrate having retractable supports extending therefrom. The retractable supports in a convex pattern are contracted with the self-adhering elastic and the substrate bearing the elastic and supports is brought into contact with the web to which the elastic is to be transferred. The series of supports around which the elastic contacts are forced to retract as the self-adhering elastic is pressed against the web causing the elastic to transfer to the substrate thereby creating an elastic band on the substrate. In a preferred form the substrate is fed two strips of self-adhering elastic that are applied on each side of a series of a convex pattern of pins and then pressed together around opposing sides of the convex pattern of pins to seal the elastic to itself and sever the elastic, creating a contoured closed loop around the pins.