Abstract: Telecommunications cable formed by locating a plurality of conductors in a group in an open array, which is preferably planar, and shaping the group into arcuate configuration around a longitudinal axis with the conductors extending generally in the direction of the axis. A layer of insulation is then provided around the group to hold it in its planar configuration.

Abstract: An improved method of manufacturing an insulated metallic edge guard, such as a door edge guard, comprises applying an insulating layer to one side of the metal strip which remains on the strip for protecting and insulating the edge guard from the object on which it is installed when in use, applying a protective layer to the opposite surface of the metal strip for the purpose of protecting the appearance of the strip during manufacturing, forming the laminated metal strip into a U-shaped cross section of desired configuration and then stripping the protective layer which is on the exterior of the U-shaped cross section from the door edge guard to expose the exterior of the metal to view.

Abstract: A device and method for wrapping a wrapping material to form S-shaped shields around a cable core of two side-by-side core units in which two tubes are provided for passage of the core units. A space between the tubes accepts the thickness of a central region of the wrapping material which has side portions extending away from the central region. Concave turning surfaces extend partially around the tubes and approach each other as they extend towards an outlet end of the tubes. The core units pass along the tubes and the wrapping materials passes along between the tubes while the turning surfaces progressively turn the side portions inwardly towards and around the tubes whereby the side portions are turned around the core units when these emerge from inside the tubes. In a practical arrangement, the turning surfaces are formed by the inside surface of a frusto core.

Abstract: An adhesive web is to be pressed on to the edge of a shaped sheet metal part, so that the web portion on the metal part has a U-shaped cross-section. To this end, the adhesive web is first peeled off a carrier tape and is then folded with the aid of a deflecting and pre-folding roller having a profile whose cross-section is a wide V. The pre-folded web is then folded further continuously in a funnel-shaped pre-folding channel.The sheet metal part whose edge is to be covered is then introduced with that edge, within the reach of the pre-folding channel, into the folded bend of the adhesive web, and both the sheet metal part and the web thereon are conveyed together by a pair of feed and press-on rollers which press the adhesive web on the edge and sides of the sheet metal part.

Abstract: A method and apparatus for applying discrete lengths of elastic strip material to predetermined areas of a continuously moving web by corrugating the web and applying the discrete lengths of substantially unstretched adhesively coated elastic over the corrugations in predetermined areas, bonding the elastic to the areas, and withdrawing the web from the corrugations to stretch the elastic; and the conformable garment produced thereby which may be in the form of an elasticized leg disposable diaper.

Abstract: A method of packaging first and second kneadable plastic masses that react when mixed includes(a) providing the masses in lengthwise elongated strip form and traveling the masses lengthwise in parallel relation but with a predetermined gap therebetween,(b) providing an elongated first plastic film that defines a barrier and traveling that film in the direction of travel of the masses,(c) and urging the traveling film toward the traveling masses to contact same and to locate the barrier in the gap.The film may have side sections simultaneously urged against surfaces of the traveling masses; a second traveling film beneath the masses may be contacted by the barrier; and end portions of the first film may be heat sealed to the second film to encapsulate the masses.

Abstract: A resin impregnated woven fabric extends the length of a joint with a pair of spaced apart panels intersecting and interwoven with an intermediate laterally extending panel. A reinforcing core extends between the spaced apart panels on one side of the laterally extending panel. Three cores are located on the other side of the laterally extending panel. The intermediate core of the three is located between the two spaced apart panels and is reinforced to provide torsional load resistance. The other two cores are reinforced to provide varying load bearing properties in a spanwise direction.

Abstract: A process for manufacturing a unique hazardous waste transport container liner is provided wherein an extruded plastic sheet is folded into a "W" shape and heat sealed at one end, then cut to a length to fit the transport container and then heat sealed at the cut end of the sheet.

Abstract: A method for holding together the opposing ends of a flat sheet wrapped around an elongate substrate employs one or more closure devices, each closure device comprising a pair of frictional elements and a means for interengaging same. The frictional elements each have a channel member having a slit and a rod member positionable within said channel member, which when so positioned cooperates therewith to provide a conduit thereinbetween and to apply frictional forces to one end of the flat sheet when the end has been inserted through the slit and is in position between the rod member and the channel member. The closure is especially suited for joining elastomeric flat sheet, the sheet and closure device or devices collectively providing a protective closure.

Abstract: An overhead electric conductor with optical fibres loosely housed in the bore of a central core, which bore also contains a greasy water-impermeable medium 4, is manufactured by causing a preformed elongate metal member of U-shaped transverse cross-section and the optical fibres to advance in the direction of their lengths, the rate of advance of the fibres being restrained. As the U-shaped elongate member is transversely folded around the optical fibres greasy water-impermeable medium is injected into the bore of the elongate metal member under a controlled pressure. The consistency of the greasy water-impermeable medium the pressure and rate at which it is injected into the bore and the degree of restraint imparted to the optical fibres 3 is such that, in a predetermined length of the conductor, the length of the optical fibres exceeds the length of the bore by a controlled extent, preferably 1 to 3%.

Abstract: Thermoplastic foam bodies are readily generally continuously laminated together wherein the joint therebetween contains a reinforcing scrim. Friction on each of the foam bodies is generally equalized by positioning the scrim relative to both major faces of the heating element employed for the lamination to obtain a desired degree of curvature in the laminate.

Abstract: A method for producing a laminated sheath product utilizing a single layer tape and providing good waterproof characteristics. A tape is longitudinally supplied, if desired, with a core, into a first die which preliminarily shapes the tape to a partial tubular form. The tape is then passed through a second die which completes the tubular formation of the tape while applying an adhesive thereto. The adhesive at the second die completely fills the area around the overlapping edges of the tape to provide a tight waterproof seal.

Abstract: A catamenial tampon is provided in the form of absorbent material enveloped by a liquid permeable cover which is then folded and compressed into a cylindrical shape. The enveloped absorbent material is in the form of a flat cushion and is first folded into front, central and rear sections with the front and rear sections overlying the central section. A withdrawal cord is looped around the first folded cushion which is then folded around the withdrawal cord and compressed into the final tampon shape. The resulting tampon expands when wet into a cup-shaped configuration.

Abstract: A process for producing a highly expanded polyolefin insulated cable comprising the steps of feeding a compound of polyolefin, nucleating agent and volatile liquid to an extruder, heat extruding said compound through said extruder onto an inner conductor passing through said extruder to cover the outer periphery of said inner conductor thereby forming an insulation layer of highly expanded polyolefin foam having a foaming ratio in excess of 2.5 times (60% expansion degree) tightly adhered to said inner conductor.

Abstract: This invention relates to electric fuses having tubular casings having a high bursting strength and to the method and materials by which these casings are made. Such tubular material has also other applications than casings for electric fuses. Tubular structures made in accordance with U.S. Pat. No. 3,979,709 of which this is a division thereof have a plurality of plies which may include strips of non-woven, non-uniformly oriented glass fiber mat, composite strips of woven glass fiber cloth and non-woven glass fiber mat and glass fiber rovings. The plurality of strips are self overlapping and their overlaps are angularly displaced relative to one another. The tubular structure further includes a synthetic thermosetting resin integrating the plurality of strips into a multi-ply laminate.This invention relates to a process of manufacturing tubular structures of the above referred-to kind by pultrusion.

Abstract: A composite material and a method for producing a composite material of a highly, multidirectionally elastic nature which includes ultrasonically welding an upper layer to a lower layer along substantially parallel, spaced apart weld seams, feeding elongated strands of an intermediate layer between the upper and lower layers and between the weld seams during the welding operation, and applying a tensile stress to at least one of the upper, lower and intermediate layers during the welding operation with such tensile stress being different from the tensile stress on at least another of the upper, lower and intermediate layers.

Abstract: In a display apparatus a face panel has a front and rear side along with a plurality of edges and a heat sealable binding material attached over the front side and around at least two edges thereof. A support may be attached to the face panel to support the face panel on a desk, or the like. The improvement is a combination of a transparent or oqaque polymer film pocket overlaying the binding material on the front side of the face panel for inserting display material such as a calendar pad and around at least two edges and secured to the adjoining rear edges of said panel. The method of making a display mount includes the steps of feeding heat sealable paper or leatherette from a roll while applying glue to the opposite side and feeding one or more panels onto the glued surface of the paper. A heat sealable polymer film is fed from a wall adjacent to and parallel to the paper on the opposite side from the panels and is heat sealed to the paper at edges remote from each other.

Abstract: A sanitary device, e.g. a sanitary napkin is provided which has an absorbent matrix and a fluid impervious baffle. Part of the fluid impervious baffle is a heat fusible sheet which is adhered to the absorbent component by fusing. The absorbent component may have heat fusible material interspersed therein and may have a fluid pervious upper layer which is essentially coterminous with or wraps about the absorbent component or the absorbent component and baffle combination. When a fluid pervious wrap is used, it is preferred that the wrap be fusible and also be fused to the baffle. The fusing is preferably accomplished in random sites across the surface of the sanitary appliance, e.g. by embossing.

Abstract: Several flat cable embodiments (10, 10',10",10"',10"") are disclosed, as are methods and apparatus (30) for the selective manufacture and connectorization of same. In accordance with one preferred flat cable embodiment (10), adapted for telephone under carpet applications, two precisely offset arrays of rectangularly shaped conductors (13, 14) are separated by a center film (16), with each array being adhesively bonded through an associated adhesive coating (21 or 22) to only the respectively adjacent one of two outer films (18 or 19).

Abstract: A tape of insulating material, provided with a binder, is fixed to an elongated, rectangular electrical conductor in a longitudinal direction thereof, the tape being brought into contact with a first side of the conductor before the other portions of the tape are folded around the conductor with the use of endless belts movable transversely to the longitudinal direction of the conductor for bringing the other portions of the tape in contact with at least two other adjacent sides of the conductor.

Abstract: A non-woven cellulose ester fibrous filter sheet material comprising cellulose ester staple fibers and cellulose ester fibrets which exhibits improved filtration properties and the method of its preparation.

Abstract: Apparatus for joining the aligned edges of superposed plies of sheet material by means of an adhesive joining strip comprises a retractable nozzle for applying adhesive to the strip, and a forming plate which is curved for guiding the strip towards said edges and which defines a channel for bending the strip into U shape so that the edges come to lie between the limbs of the U.

Abstract: An improved tape dispenser and applicator assembly for wrapping a foil-like tape about edge portions of glass pieces and similar material, wherein the assembly includes at least one roller assembly formed by a pair of rollers biased against one another. A groove straddles the pair of rollers, with the groove automatically providing a substantially uniform pressure for pressing the tape into contact with the glass edge portion.

Abstract: Wrapping an article such as cable or optical fibre in wrapping material by a progressive operation in which the wrapping material is pressed along a narrow width portion to the article and then succeeding width portions are also turned around the article and pressed against it. The procedure is intermittent with each width portion turned completely against the article before turning of the next portion. This method eliminates wrinkles in the wrapping material. The process is convenient when using contact adhesive on a surface of the wrapping material.

Abstract: Thermoplastic materials are converted directly into thermally bonded, coherent fibrous products by melt blowing techniques. The fibrous product is in the form of a rod having a relatively dense, rigid skin in which the fiber portions are oriented primarily in a longitudinal direction with respect to the axis of the product, and a less dense core where the fiber portions are oriented primarily in a transverse direction with respect to the axis of the product. The products are made by melt blowing fibers and intercepting them by a fiber collecting and forming device which permits a relatively heavy build-up of fiber mass in the central portion and a relatively light build-up of fibers in a lip portion surrounding the central portion.

Abstract: Straps or belt loop strips are formed with the apparatus and method of the present invention by folding a strip of fabric about a strip of fusible material, threading the folded, combined strip back and forth between two side-by-side, counter-rotating cylinders so that, in the preferred embodiment, the strip forms a plurality of figure eight patterns over and between the two cylinders, and heating the cylinders to a temperature which is above the melting point of the fusible strip but below the scorching point of the material. The speed at which the cylinders are counter-rotated with respect to each other is chosen, in conjunction with the number of loops of the combined strip over the cylinders, to place the combined strip in contact with the heated surface for a length of time sufficient to accomplish complete fusing.

Abstract: The wrapping of articles of indefinite length, particularly cable by locating wrapping material along and parallel to a facing surface of the article and wrapping the material around the article while substantially avoiding frictional contact between material and article. With the wrapping material loosely applied, binding material is applied to cause the wrapping material to tightly surround the article. A forming die for performing the operation, has an arcuate orifice extension connected to the die orifice for guiding an overlapping edge of wrapping material. Apparatus is included which has at least one die. Where more than one die is used, the positional relationship of the dies is determined to prevent the frictional contact between material and article during wrapping.

Abstract: Steel bars are continuously fed along an inclined path in a direction transverse to the bar axes, are separated one from another by a separator and are then supplied by a roller conveyor to an axial interval regulating station. From this station one steel bar after another is supplied in the axial direction with regular intervals between the bars by means of sets of pinch rollers which are provided at specific intervals and which can be separately dislocated out of the path of movement of the bars and by means of a rod and a spacer fitted to the tip of a swing rod pivotally connected to the rod. Steel bars are thus delivered at regular intervals to a coating station and thereat have the entire lengths thereof, except the threaded end portions thereof, coated with a coating layer of asphalt, epoxy resin or grease by a coating device including a fixed outer nozzle and a movable inner nozzle.

Abstract: A high strength ribbed panel assembly formed of laminated plastic impregnated fibrous sheet stock to form a flat panel member; the panel member including a surface lamination which is provided with sets of multiple laminations integral with the surface lamination and extending laterally therefrom to form a series of spaced reinforcing ribs; a pair of the panel assemblies may be so proportioned as to be joined with their ribs in overlapping, mutually bonded relation to form a pallet suitable for shipping and storage.The method of manufacturing involves the steps of forming the ribs by progressively folding selected portions of a plastic impregnated fibrous sheet into mutual contact to form a plurality of multi-laminated ribs, applying additional laminations over the plastic sheet to form a panel assembly, then joining a pair of assemblies with their respective ribs bonded together. The means of manufacture involves means for carrying out the method.

Abstract: A method of manufacturing a slide fastener stringer is disclosed as including the steps of cutting a row of transverse slits in a strip, and applying a row of reinforcements across the strip, placing a continuous coupling element on the strip so that head portions protrude out of the slits.

Abstract: A method and apparatus for forming shaped articles from glass fiber reinforced gypsum. An aqueous slurry of gypsum hemi-hydrate, water and glass fibers contains between 22 and 45 parts by weight water, 100 parts by weight gypsum hemi-hydrate and 3 to 10 parts by weight glass fiber. The slurry is deposited as a continuous ribbon on a moving, water-impermeable formable sheet which is pre-shaped and thereafter the slurry ribbon is pressed into a desired profile. The formable sheet and slurry ribbon are maintained in the desired profile until the slurry sets. Thereafter the product ribbon is cut transversely into lengths as desired. The formable sheet may be removed before cutting, or may be retained in engagement with the product ribbon during and after cutting to serve as a protective cover for the surface of the article. The process and apparatus are especially adapted to produce liner sheets for building construction panels.

Abstract: The apparatus is constructed to produce a hollow filter rod. The apparatus includes a mandrel through which a supplied length of tubing is passed, a nozzle surrounding the mandrel for shaping a stream of fibrous filter material about the mandrel and a forming means for enveloping a web of paper about the fibrous filter material and the tubing to produce the filter rod. The mandrel can be adjusted relative to the forming means to ensure an accurate centering of the tubing within the filter rod.The hollow filter includes a rigid non-deformable tube defining a smoke passage having a draw resistance to control the amount of unfiltered smoke, a concentric layer of filter material and a perforated outer wrap for passage of air into the layer of filter material.

Abstract: In method for application of a tape of insulating material provided with a heat fixing binder to a substantially elongated rectangular electrical conductor in the longitudinal direction thereof, the conductor is heated, a portion of the tape is contacted with the first side of the conductor and other portions of the tape are successively contacted with other respective sides of the conductor. The successive steps of contacting after the first contacting step each include a first step of folding a portion of the tape about an edge of the conductor and then contacting a portion of the tape with a side of the conductor including that edge. The conductor may be additionally heated after several steps of folding and contacting, and pressure may be applied to the conductor and tape after the tape has been completely fixed to the conductor.

Abstract: Method and apparatus for forming sheet material into continuous structural shapes, particularly adaptable to the forming and joining of reinforced plastic sheet material, wherein the material is heated, formed, joined, consolidated, and cooled in a continuous process.

Abstract: Pharmaceutical dosage forms comprising an edible web having deposited thereon or at least partially thereon a particulate medicament, the webs being thereafter fabricated and finished to pharmaceutically elegant solid dosage forms having no medicament exposed on an exterior surface. The dosage forms have a consistency of release of medicament which can be controlled to exacting specifications. The disclosed solid dosage forms are prepared by high speed automated equipment and the process by which they are made is characterized by non-destructive quality control analysis and performance evaluation both conducted on-line and integrated into the manufacturing operation. Included in the scope of the disclosed invention are certain apparatus and methods of manufacture.

Abstract: A target made of interchangeable sections each comprising a multiplicity of membranes or plies of penetrable, elastomeric or resilient, tear resistant sheet resin material, the membranes being separated by intervening layers of porous or low density, resilient material such as foam resin material. Method and apparatus for making components for such targets are also disclosed.

Abstract: In order to prepare stained glass chips so that they can be assembled together into a stained glass window or other work, the edges of the chips are wrapped with foil. This foil is dispensed from a roll along a path to a wrapping roller. The roller has a groove with a step and defines portions of different widths to accommodate stained glass chips and foil of different widths. The size of the groove portions are wider than the chips so that the foil will wrap around the edges of the chip and be pushed into contact with the side of the chip lying adjacent to its edges when the chip is pressed against the groove portions. Rotation of the chip also rotates the wrapping roller which is mounted so as to be free to rotate. This pulls the foil being applied to the chip.

Abstract: A method and apparatus are disclosed for manufacturing electrical connectors of the type comprising cylindrical elastomeric body having a flexible film wrapped therearound,the film having circumferentially extending conductors on its external surface. The manufacturing method includes the steps of feeding an endless length of body material and an endless length of film along paths which converge so that the film is against, and travels with, the body material. The film is progressively wrapped around the body material and the marginal edge portions of the film are bonded to each other. The endless length of film and body material is cut to produce the connectors seriation. The apparatus comprises a feeding means for feeding the film and body material through forming surfaces, a bonding means, and finally to a cutting means.

Abstract: Untwisted synthetic resin string comprising two rolled portions each spiral in cross section and formed by inwardly rolling toward each other the opposite side edges of a strip of thermoplastic resin film stretched at least longitudinally thereof. The rolled portions extend longitudinally of the string in parallel with each other and are partially adhered together longitudinally thereof. Also disclosed are an apparatus for manufacturing the untwisted string from a strip of thermoplastic resin stretched at least longitudinally thereof and another apparatus for manufacturing an untwisted string having a single rolled portion from like resin strip.

Abstract: In a preferred embodiment, a continuous elastic ribbon is fed to a diaper web assembly station in a stretched condition. While traveling to the assembly station, an adhesive is applied to discrete lengths of the elastic ribbon at regularly spaced intervals. Simultaneously, discrete absorbent core segments as well as webs of moisture-impervious backsheet material and moisture-pervious topsheet material are fed to the diaper web assembly station. At the station, the stretched elastic ribbon is adhered to the moisture-impervious backsheet web in the discrete areas of the elastic which are covered by adhesive at predetermined points along the length of said web. After the adhesive has set up, the assembled web and the elastic contained therein is severed in its unadhered areas, whereupon the unadhered end portions become relaxed and inactive without affecting the functionality of the adhered portions in the ultimate assemblage.

Abstract: A device for deflecting a continuously supplied thread by means of a curved guide tube. The guide tube is formed of a plurality of contiguously abutting segments which are disposed between the entry and exit openings of a casing. The space between the inner wall of the casing and the outer circumference of the segments is filled with a bonding agent which fixes the segments in the desired spatial curvature for the guide tube when it hardens. Furthermore, a method for producing such device is disclosed which utilizes an expandable mandrel to hold the segments in the desired spatial curvature position prior to being fixed in position by the bonding agent.

Abstract: A composite panel-board is made up of a rigid, gypsum board, base panel having a rigid, organic plastic, foam layer formed in-situ on, self-adherent to, and essentially covering one of the broad, flat surfaces of the gypsum board base panel. A water-vapor-resistant, flame-retardant layer is adherent to and covers the otherwise exposed, broad surface of the rigid foam layer. The composite panel-board is fabricated by attaching upwardly extending edge sheets on or adjacent to the mutually opposite, side edges of the gypsum board panel so that the mutually opposite edge sheets, together with the gypsum board panel, form a trough. The upper surface of the gypsum board panel is heated to a temperature of at least about 95.degree. F in the presence of a water unsaturated atmosphere, and then a uniform layer of a foamable, liquid, organic plastic material is applied to the upper surface of the gypsum board panel.

Abstract: Method and apparatus for applying adhesive attaching tapes to pads, such as diapers, in which an elongated strip of adhesive tape having an adhesive face and a non-adhesive back is folded longitudinally about a hingeline to form tape wings having their non-adhesive backs together and their adhesive faces facing away from each other. A release liner is applied to the adhesive face of one of the wings, leaving the adhesive face of the other wing exposed. Discrete folded tape segments are severed from the folded strip and are transferred from the vicinity of the severing tool to the vicinity of the pad by drawing the lined wings of the folded tape segments by vacuum against a vacuum drum. The adhesive face of the exposed wing faces outwardly of the drum. The drum is rotated to adhere the adhesive face of the exposed wing to a portion of the pad in the course of drum rotation.

Abstract: A method and apparatus for continuous welding together of sheets of the type in which adhesion is derived from the melting and re-hardening of the sheet material itself rather than from an externally applied adhesive. A sheet, formed into a tube with the opposite sides overlapping, is tensioned longitudinally so as to form longitudinally extending stress lines which appear as ripples, at least at the overlapping edges such that the sheets weld at the bottom of the valleys formed by the ripples. As the tensioned sheet moves continuously between a heating element and a backing plate, both of which are stationary relative to the tube forming means, the sheets weld as the material from the sides of the valley of at least one sheet runs to the bottom of the valley, at which point the weld bead is formed, whereby the thickness of the weld bead may be more than twice the thickness of the original unheated sheet material.

Abstract: The apparatus is constructed to produce a hollow filter rod. The apparatus includes a mandrel through which a supplied length of tubing is passed, a nozzle surrounding the mandrel for shaping a stream of fibrous filter material about the mandrel and a forming means for enveloping a web of paper about the fibrous filter material and the tubing to produce the filter rod. The mandrel can be adjusted relative to the forming means to ensure an accurate centering of the tubing within the filter rod.The hollow filter includes a rigid non-deformable tube defining a smoke passage having a draw resistance to control the amount of unfiltered smoke, a concentric layer of filter material and a perforated outer wrap for passage of air into the layer of filter material.

Abstract: The application discloses a means and method for manufacture and assembly of a known pivotally mounted sleeve-type photographic print display device. The display device comprises a relatively rigid planar cardboard base to which there are pivotally attached to at least one surface thereof in mutually staggered relation, a plurality of individual open-ended flattened sleeves, each having a paper insert of congruent dimensions. Attachment to the base is by an adhesive strip which forms a hinge.

Abstract: An apparatus and method for applying folded lengths of pressure-sensitive adhesive tape to articles with one-half of the adhesive surface of the tape length secured to an article and a liner secured to the other half of the adhesive surface. The adhesive tape is folded to leave the adhesive surface exposed. A liner which may be wider than the folded tape is then secured to the adhesive on one-half of the folded tape. The tape and liner composite is cut and a movable vacuum pad applies the cut length to the article with the exposed adhesive applied to the article. The wide liner is easily removed when the tape tab is to be used.

Abstract: A bag structure of the flap type wherein the flap is tack heat-sealed for ready opening by virtue of heat-sealing webs together, wherein the heat-seal overlies a coating substantially resistant to union with thermoplastic material when the latter is in a molten state.

Abstract: A method for making hose including the steps of spiralling plies of thermoplastic tubing over a vulcanizable elastomeric tube where the tubing of successive plies are oppositely spiralled from each other; pressurizing and sealing the tubing; heating the assembly to a temperature lower than the melting point of the tubing; and vulcanizing the elastomeric tube.

Abstract: A method of and apparatus for manufacturing stock material from which bags or other containers may be formed is disclosed. A folded plastic film is fed from a stock roll onto a plurality of carrier rollers which support the film in a horizontal position. Simultaneously, a separate closure strip is fed from a second stock roll through a guide block which aligns the strip with a sealing station, the two halves of the closure strip being pressed together to maintain proper alignment. The upper ply of the folded plastic film is fed into the heat sealing apparatus at the sealing station, the edge of the upper ply being aligned with one edge of the closure, and the film and the closure strip are fed continuously through the sealing station where they are welded together. The lower ply of the film web is folded downwardly so that it bypasses the sealing station.