And Edge-joining Of One Piece Blank To Form Tube Patents (Class 156/203)
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Patent number: 4813208Abstract: A method and a device for scrap-free manufacture of coated profiles and thermoformed containers.A hollow pipe having a cross-section suitable for the desired profile is extruded.The extruded hollow profile is cut longitudinally.Thereafter the profile is planar laminated by a web formed material having desired characteristics.The cut, laminated profile thereafter is formed into the original shape thereof, or another suitable shape, and is formed into container casings.When thermoforming containers, a hollow profile is extruded from a thermoformable material in an extruder, this hollow profile is cut, in one or several longitudinal cuts. In web or roller form such cut profile is supplied to a so called scrap-free thermoforming machinery, where the thermoformed containers are manufactured.Type: GrantFiled: May 28, 1987Date of Patent: March 21, 1989Assignee: AB Akerlund & RausingInventors: Lars E. Piltz, Lennart Larsson
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Patent number: 4793890Abstract: An automatic joining apparatus for automatically joining an attachment start edge and an attachment finish edge of a carcass play cut into a length somewhat shorter than a circumferential length of a former drum and wound around the former drum, is disclosed. The apparatus comprises a pair of magnet-containing drive rollers movable in the axial direction of the former drum while being held in contact with the proximity of the attachment start edge of the carcass ply and the proximity of the attachment finish edge thereof to join the attachment start edge and the attachment finish edge together, and a pair of gathering rollers movable in the axial direction of the former drum behind the magnet-containing drive rollers while being held in contact with the proximity of the attachment start edge and the proximity of the attachment finish edge to join the attachment start edge and the attachment finish edge together.Type: GrantFiled: November 19, 1987Date of Patent: December 27, 1988Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventor: Hidemasa Sato
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Patent number: 4780165Abstract: Method and apparatus for encasing drainage pipes, using fibrous or particulate loose filler material guided onto the drainage pipe by means of a hollow screw and held there with a permeable envelope material preferably wound round with a filament. The pitch or number of threads on the screw, the height thereof and the speed at which the screw rotates determine the amount of filler material applied to the drainage pipe per unit of area. The apparatus comprises a machine consisting of a guide tube carrying an internal hollow screw, the drainage pipe being guided in the interior of the screw, the encasing envelope material being placed externally upon the said guide tube and preferably being wound around with a filament at the end of the screw.Type: GrantFiled: September 15, 1986Date of Patent: October 25, 1988Assignee: Corma, Inc.Inventors: Hermann Stover, Alfons Meyer
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Patent number: 4778543Abstract: In the making of an electrical cable, a metal shield is formed by wrapping metal strip around a cable core with longitudinal edges of the strip overlapping. The strip is corrugated with the corrugations nesting in the overlapped regions. A shield gap filler is provided by extruding a heated molten plastics material and directing it between the overlapped regions. Upon cooling, the filler hardens and bonds the edges together. A cable jacket is extruded around the shield.Type: GrantFiled: March 25, 1987Date of Patent: October 18, 1988Assignee: Northern Telecom LimitedInventor: Ali Pan
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Patent number: 4755164Abstract: An applicator for tampons has a sleeve for the tampon and for a portion of a reciprocable pusher which can expel the tampon by causing the latter to flex outwardly a set of domed petals at the front end of the sleeve. The sleeve is formed by advancing a strip of degradable material longitudinally, by forming spaced-apart portions of the strip with transversely extending rows of hourglass-shaped webs, by converting the strip into a tubular envelope with a seam extending in parallelism with the axis of the envelope, by severing the envelope across the rows of webs so that the envelope yields a series of tubes each having a circumferentially extending set of petals (halves of webs) at each of its ends, and by cutting each tube midway between its ends to form shorter tubes (sleeves) each of which has a set of petals at one end. The petals are thereupon domed to close the respective ends of the sleeves and the other ends of the sleeves are formed with indentations which center the respective pushers.Type: GrantFiled: December 23, 1986Date of Patent: July 5, 1988Assignee: Hauni Richmond, Inc.Inventor: Alfred Hinzmann
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Patent number: 4737210Abstract: A high tensile strength and high abrasion resistant removable hose covering and method of construction is described for fabricating a reusable, removable hose covering adapted to surround an inner hose by which high tensile strength in the longitudinal direction may be imparted to the combination of the inner hose and removable hose covering and in addition, extreme high resistance to environmental abrasion is obtained. The inner hose is constructed by conventional methods.Type: GrantFiled: May 7, 1987Date of Patent: April 12, 1988Assignee: Durodyne, Inc.Inventor: Robert C. Dougherty
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Patent number: 4733800Abstract: A packaging tube including a body formed from a laminate containing a metal foil and a plastic layer is provided with a strip also formed from a laminate incorporating a metal foil and a plastic film. The metal foil in the strip is thicker than the metal foil in the body laminate. The strip provides dead-fold characteristics. The strip may extend along a joint, such as a butt joint, in the tube body so that the strip covers the joint.Type: GrantFiled: September 19, 1985Date of Patent: March 29, 1988Assignee: AB Akerlund & RausingInventors: Carl-Axel Bjorkengren, Lennart Mansson
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Patent number: 4722759Abstract: An apparatus is disclosed for fabricating drip irrigation tape from a water impervious polyethelene film. A shaping assembly with a water-cooled vacuum drum preforms a groove along one edge, a folding device folds the strip lengthwise to form a first conduit, and a sealing assembly with an electrically-heated heat sealing wheel joins the edges along opposite sides of the groove to form a seam in which the groove defines a secondary conduit that is resistant to deformation. Flat spots on a pair of outwardly-extending annular ribs around the circumference of the heat sealing wheel produce breaks in the seam for inlet ports and outlet ports.Type: GrantFiled: March 1, 1985Date of Patent: February 2, 1988Assignee: James C. RobertsInventors: James C. Roberts, David E. Mominee
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Patent number: 4713135Abstract: A method for seaming flexible cellulose webs, to form a flexible cellulosic laminate structure, by a process which comprises overlapping edges of said cellulosic web, applying therebetween an aqueous zinc chloride solution, heating and pressing together the overlapped edges and retaining at least about 0.002 g/cm.sup.2 or more zinc chloride at the seam of said web and the reuslting seamed webs.Type: GrantFiled: September 9, 1985Date of Patent: December 15, 1987Assignee: Teepak, Inc.Inventor: Douglas J. Bridgeford
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Patent number: 4698891Abstract: An elongated spacer is disclosed for use in separating the glass panes in multiple-glazed thermal windows. The spacer has an elongated hollow interior for storing a dessicant material and a plurality of moisture barrier partitions at intervals along the length of the interior. The spacers are originally manufactured in oversized lengths and later cut to fit particular windows. The partitions divide the elongated interior into subcompartments, and when the spacer is cut to length the partitions confine moisture contamination and dessicant loss to the particular subcompartment which is cut.Type: GrantFiled: October 21, 1986Date of Patent: October 13, 1987Inventor: Ryszard Borys
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Patent number: 4690668Abstract: A method and an apparatus for heat welding a butt seam on a tube of packaging material, in which the welding heat is generated by applying a high-frequency alternating electromagnetic field of a pair of induction coils. To prevent current arcing at the cut edges of a metal inlay of the packaging material in the vicinity of the abutting edges of a sheet of packaging material, the edges are guided spaced apart from one another by a predetermined distance. To this end, the apparatus has a separating blade, which in the operative range of the electromagnetic alternating field protrudes in between the abutting edges of the sheet of packaging material and between the induction coils.Type: GrantFiled: June 18, 1986Date of Patent: September 1, 1987Assignee: Robert Bosch GmbHInventors: Manfred Rebmann, Helmut Weigold
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Patent number: 4680071Abstract: Indefinite length tubular and sheeting products can be fabricated using either a continuous or step-wise method which uses a two-stage curing sequence. In the first curing stage, the center portion of a thermosetting web is fully cured leaving the lateral edges of the web in an uncured state. The uncured lateral edges are then spliced, either directly to one another, or spliced with a similar web having uncured edges to form either a flat sheet or a tubular preform having longitudinal uncured spliced seams. In the second curing stage, these uncured longitudinal splices are fully cured to form either tubular articles or flat sheeting having completely uniform physical properties throughout.Type: GrantFiled: July 27, 1984Date of Patent: July 14, 1987Assignee: The Goodyear Tire & Rubber CompanyInventor: Richard D. Candle
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Patent number: 4673599Abstract: Fur garland is prepared by cutting strips crosswise to the length of pelted knitted pile fabric, applying spray contact adhesive to the lengthwise edges of the plush pile, pulling on the strip lengthwise causing the knitted body to curl into a tubular shape adhesively attaching the edges together forming a plush garland, attaching tubular force fit interlocks on both ends of the garland allowing the garland to be connected in a continuous length.Type: GrantFiled: January 24, 1986Date of Patent: June 16, 1987Inventor: David Vanderslice
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Patent number: 4643788Abstract: A process for producing a tubular casing by folding a flat plastic sheet (1) into a tubular structure by a shaping former (6) as the sheet advances, and joining the meeting edges of the folded sheet to form the tubular casing, characterized by forming grooves (13) on one or both sides of the sheet along fold lines, coating a surfactant (12) on the sheet surface at least at the fold line portions of the sheet surface which are to be brought into contact with the shaping former, and then folding the sheet into a tubular structure by the shaping former.Type: GrantFiled: April 3, 1985Date of Patent: February 17, 1987Assignee: Mitsubishi Plastics Industries LimitedInventor: Tadashi Hashimoto
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Patent number: 4642973Abstract: A dual compartment powder cartridge including a porous shell formed by fusing the lapped side edge portions of a blank of sheet material to a central portion thereof to form two compartments, a pointed closed first end on the cartridge, powder in the dual compartments, and a sealed second end on the cartridge for closing the compartments. A machine for forming a dual compartment cartridge including a first station for scoring a strip of material with spaced parallel score lines, a second station for folding the strip of material along the score lines to cause opposite edge portions to be placed in lapped engagement with each other and with the central portion of the strip, and a third station for ultrasonically welding the lapped portions to provide a seam between two adjacent compartments.Type: GrantFiled: August 5, 1985Date of Patent: February 17, 1987Assignee: Multiform Desiccants, Inc.Inventors: John S. Cullen, Samuel A. Incorvia, James A. Vogt
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Patent number: 4642152Abstract: An elongated fluid distributing hose for use in an irrigation system for plants, vegetables, and the like. The hose incorporates a particular arrangement of a main supply channel for gross water movement, and a water distributing network for fine water movement. Water pressure reduction takes place in the water distributing network at the point of the passing of the water from the high pressure main supply channel through a series of first fluid-passing openings or inlet stations through one or more smaller fluid-restricting passages. In certain embodiments, a structure is provided to perform a pressure regulating function in each of the smaller passages. In one embodiment, pressure reduction between an inlet and an outlet is by way of serpentine fluid-restricting path. A novel method and machine are employed to manufacture the various hoses embodying the teachings of the subject invention.Type: GrantFiled: July 25, 1984Date of Patent: February 10, 1987Inventor: Richard D. Chapin
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Patent number: 4625496Abstract: A method and apparatus for forming plastic bags with zipper profile thereon, in situ, on a form and fill machine. Plastic film sheeting containing profiles is moved over a forming collar disposed about the filling spout of the machine. A major portion of the film is formed into a tube about the spout while a minor portion of the film, including the profiles, is directed away from the spout. After the tube is formed and filled, the major and minor portions are brought into alignment and transverse seams are formed on opposite sides of the product to form the bag.Type: GrantFiled: June 11, 1985Date of Patent: December 2, 1986Assignee: Minigrip, Inc.Inventor: Steven Ausnit
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Patent number: 4606954Abstract: The invention relates to a method for the manufacture by means of shrink-forming of a packing container of orientation-stretched laminate comprising polyester and aluminium foil, the laminate being formed to a tube (14) and subsequently being made to shrink over a mandrel (10,28) to the intended shape.Type: GrantFiled: September 20, 1985Date of Patent: August 19, 1986Assignee: Tetra Pak Developpement SAInventors: Anders R. Rausing, Erling I. Nilsson
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Patent number: 4595431Abstract: Methods and apparatus are provided for controlling the quantity and distribution of a waterproofing material (26) on an advancing strip (76) of plastic material which is wrapped subsequently about an advancing cable core (22) to form a core wrap. When the plastic strip is wrapped about the core, which has been filled with the same waterproofing material, the waterproofing material on the strip fills any spaces between the strip and the core, between the strip and an inner metallic shield (31) and a longitudinal overlapped seam of the core wrap. In another cable structure, a controlled amount of waterproofing material is disposed along a longitudinal edge portion of the advancing strip of plastic material to insure a sealed seam when the strip is wrapped about the core.Type: GrantFiled: January 28, 1985Date of Patent: June 17, 1986Assignee: AT&T Technologies, Inc.Inventors: William D. Bohannon, Jr., Alfred S. Hamilton, Danny E. West
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Patent number: 4592795Abstract: Amylose and high amylose starch fibrous food wrappings, including casings for meat products provide a low cost alternative to ordinary fibrous casings. The composite material consists of a cross-linked matrix of the amylose polymer coupled or bonded with the reinforcement and possesses a wet strength and elongation properties for suitable handling and stuffing without exhibiting embrittlement upon aging.Type: GrantFiled: November 26, 1984Date of Patent: June 3, 1986Assignee: Inc. TeepakInventor: Douglas J. Bridgeford
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Patent number: 4572756Abstract: An elongated fluid distributing hose for use in an irrigation system for plants, vegetables, and the like. The hose incorporates a particular arrangement of a main supply channel for gross water movement, and a water distributing network for fine water movement. The major water pressure reduction takes place in the water distributing network made up of a series of first, second, and third fluid-restricting passages and is eventually released to the exterior of the hose through a series of discharge fluid-passing openings or outlet stations. A novel method and machine are employed to manufacture the hose embodying the teachings of the subject invention.Type: GrantFiled: January 16, 1985Date of Patent: February 25, 1986Inventor: Richard D. Chapin
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Patent number: 4566927Abstract: A method and apparatus for high speed pouch or bag making from thin, heat-sensitive thermoplastic film webs or multiply webs of paper, film and foil in which the seal pattern may be simple or complex sealing and in which the method is applied to a continuously moving web and sealing is achieved at temperatures below the softening temperatures of the film or the sealing interfaces. A method of forming an open pouch comprising the steps of continuously driving an elongated web of pouch forming material at a constant speed along a pouch making path which extends continuously through a web coating station, a web collating station, an E.B. curing station and a web cutting station. A pattern of a coating is applied to a first surface of a first continuous web of pouch forming material as it is driven continuously through the web coating station to render the interface bondable at a seal line and non-bondable in the area of the storage compartment when subjected to electron beam radiation.Type: GrantFiled: December 2, 1980Date of Patent: January 28, 1986Inventor: James R. Wood
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Patent number: 4564407Abstract: A manufacturing method for a cushioning material of air-filled film, wherein a plastic film sheet formed into a cylindrical shape is transversely fusion-bonded so that small air-filled cells are fabricated continuously. Manufacturing equipment is provided with a means for forming a plastic film into a cylindrical shape, a longitudinal sealing means, a roller means, and a transverse sealing means.Type: GrantFiled: April 16, 1984Date of Patent: January 14, 1986Assignee: Orihiro Co., Ltd.Inventor: Orihiro Tsuruta
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Patent number: 4563231Abstract: Disclosed is a tubular casing of fiber-reinforced regenerated cellulose comprising a film web which is curved to form a tube. The edge regions of the film web, which run parallel to the longitudinal axis, abut or overlap slightly and are sealed by means of a film strip which covers both the edge regions. The film web and the film strip composed of the same material have, in the wet remoistened stage, a breaking strength of about 15 to 30 N/mm.sup.2 and an elongation at break of about 30 to 50% in the longitudinal direction of the web, and a breaking strength of about 15 to 35 N/mm.sup.2 and an elongation at break of about 30 to 50% in the transverse direction of the web. The breaking strength in the transverse direction of the web is equal to or greater than that in the longitudinal direction of the web. On its entire surface facing the film strip, the tubular casing has a substantially gas-impermeable and sealable layer, as has the film strip on the surface which comes into contact with the tubular casing.Type: GrantFiled: May 26, 1983Date of Patent: January 7, 1986Assignee: Hoechst AktiengesellschaftInventors: Herbert Porrmann, Walter Seifried, Ludwig Klenk, Karl Stenger
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Patent number: 4557888Abstract: The invention relates to a method for the manufacture by means of shrink-forming of a packing container of orientation-stretched laminate comprising polyester and aluminium foil, the laminate being formed to a tube (14) and subsequently being made to shrink over a mandrel (10,28) to the intended shape.Type: GrantFiled: September 9, 1983Date of Patent: December 10, 1985Assignee: Tetra Pak Developpement SAInventors: Anders R. Rausing, Erling I. Nilsson
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Patent number: 4555289Abstract: A method and apparatus for providing a fin-type back seal on packages produced in a vertical form and fill machine utilizes a web having cohesive coating stripes on the edges thereof which are juxtapositioned by forming and then guided to a cold sealing zone. A cold seal assembly with a pressure-biased grooved roller and complementary platen apply rolling pressure to the cohesively striped area without the application of external heat to provide a good seal. The unit is adjustable universally so as provided adaptation to various styles and types of existing machines.Type: GrantFiled: June 1, 1983Date of Patent: November 26, 1985Assignee: Frito-Lay, Inc.Inventor: William D. Kreager
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Patent number: 4512838Abstract: A method for joining together laminated material including layers of orientation-stretched polyester and glycol-modified polyester. A strand of molten glycol-modified polyester is applied to the laminated material along the joining area and the laminated material is pressed together while the strand is cooled. The laminated material is joined together by transferring heat from the molten strand to the pressed-on layers of the laminate. The surface portions of the layers are melted at the same time as the strand is cooled.Type: GrantFiled: January 20, 1983Date of Patent: April 23, 1985Assignee: Tetra Pak Developpement SAInventor: Anders R. Rausing
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Patent number: 4490962Abstract: Apparatus for securing plastic film about a product including a curved forming plate, sealer means cooperating with the plate to form spaced discrete heat seals in overlapping portions of plastic sheet disposed about the plate and product, and transport means for reciprocatably moving the sealer means so that it remains in engagement with overlapped sheet portions and follows the path of movement thereof for a predetermined period of time.Type: GrantFiled: August 11, 1983Date of Patent: January 1, 1985Assignee: Crown Zellerbach CorporationInventors: Rudolf R. Weis, Rudolph W. Schutz
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Patent number: 4482413Abstract: A strip (56) of non-metallic material and one (59) of a metallic material are wrapped simultaneously about an advancing cable core (32) to enclose partially the core. Then longitudinal edge portions (71, 72) of the strip of non-metallic material are separated by a shoe (150) which permits movement of the edge portions in a direction circumferentially of the core. One longitudinal edge portion (72) of the non-metallic strip becomes confined in a guideway (118) of a tool (99) and longitudinal edge portions (73, 74) of the metallic strip (59) are guided along guideways (117, 118) of the tool as the strips are moved through a converging passageway (103). This controls the relative circumferential movement between the edge portions as the strips are moved through the passageway to form a core wrap (33) and a shield (34).Type: GrantFiled: August 31, 1983Date of Patent: November 13, 1984Assignee: AT&T Technologies, Inc.Inventors: William D. Bohannon, Jr., Alfred S. Hamilton
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Patent number: 4478663Abstract: A plastic sheet (13) having a surface with low friction and high gloss is produced by extruding a layer of thermoplastic and pressing it while hot against the surface of a chill roller (17). The surface of the chill roller (17) is characterized by being highly polished and having minute randomly distributed depressions therein of an average depth of about 5 microns, a depth standard deviation of less than 3 microns, and an average frequency of about 3,000 per square centimeter. The thermoplastic layer may be laminated to a single or multilayer base (12) to form a finished product (21). A polyethylene surface layer will have a coefficient of friction generally less than 1.0 with respect to itself, while the surface nonetheless retains a high gloss appearance.Type: GrantFiled: September 30, 1983Date of Patent: October 23, 1984Assignee: American Can CompanyInventor: Eileen F. O'Sullivan
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Patent number: 4478670Abstract: Disclosed is a process and apparatus for forming a tube from a flat web by overlapping the edge zones of the web with one another or with a flexible strip while maintaining distance between the adhering, overlapping surfaces in order to provide horizontally straight edges, and thus a circumferentially constant diameter.Type: GrantFiled: November 12, 1982Date of Patent: October 23, 1984Assignee: Hoechst AktiengesellschaftInventors: Klaus Heyse, Klaus Andrae
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Patent number: 4477298Abstract: A cable shielding method and apparatus are disclosed wherein adhesive 42 is applied to a strip 40 of shielding material within a shield forming die 20 as the strip 40 is being formed about a cable core 10 with an overlapped shield seam.Type: GrantFiled: September 24, 1982Date of Patent: October 16, 1984Assignee: AT&T Technologies, Inc.Inventors: William D. Bohannon, Jr., Michael D. Kinard, Randy G. Schneider
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Patent number: 4477502Abstract: A plastic sheet (13) having a surface with low friction and high gloss is produced by extruding a layer of thermoplastic and pressing it while hot against the surface of a chill roller (17). The surface of the chill roller (17) is characterized by being highly polished and having minute randomly distributed depressions therein of an average depth of about 5 microns, a depth standard deviation of less than 3 microns, and an average frequency of about 3,000 per square centimeter. The thermoplastic layer may be laminated to a single or multilayer base (12) to form a finished product (21). A polyethylene surface layer will have a coefficient of friction generally less than 1.0 with respect to itself, while the surface nonetheless retains a high gloss appearance.Type: GrantFiled: April 29, 1983Date of Patent: October 16, 1984Assignee: American Can CompanyInventor: Eileen F. O'Sullivan
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Patent number: 4469542Abstract: Pieces of tube are produced from a flat flexible web by feeding the web intermittently into apparatus which first makes transverse incisions from each edge partly across the web at a spacing equal to the desired tube lengths. The side portions between the incisions are then folded along longitudinal fold lines so that their end edges overlap and are welded together. In a subsequent operation, the non-incised central flat portion of the web is severed in line with the incisions and the tube elements thus formed are then moved transversely to the direction of web movement by a reciprocating slide to stand upright on tube-shaping members.Type: GrantFiled: September 2, 1983Date of Patent: September 4, 1984Assignee: Tetra Pak DeveloppementInventor: Wilhelm Reil
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Patent number: 4446181Abstract: A tubular lining for lining passages is formed, such liner being constructed from a laminate comprising a resin absorbent layer and an impermeable skin. The laminate is wrapped to tubular form with the skin outermost and the free edges are butted together and are connected in this condition by a sewing operation. A sealing ribbon as applied over the sewing to seal the seam and stitching to prevent the flow of liquid or synthetic resin through the seam when the lining is used.Type: GrantFiled: March 30, 1982Date of Patent: May 1, 1984Assignee: Insituform International Inc.Inventor: Eric Wood
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Patent number: 4437914Abstract: A method of producing sheathed cables and/or transducers such as wire strain gauges, temperature probes and so on. Such cables comprise an outer tubular casing and one or more electrically conductive leads embedded in insulating material. Production begins on a flat strip which is bent by means of a female mold into a tubular shape with an approximately circular cross-section, whereby the free edges of this blank are bent back so as to form radially protruding flanges. The leads are inserted into this preformed tubular casing and the spaces are filled with insulating material in powder form. The diameter of the tube is reduced and the density of the inserted insulating material is increased by pulling on the flanges in a specially designed abutment. After the desired density is attained, the flange is cut off and the free edges are welded together.Type: GrantFiled: March 8, 1982Date of Patent: March 20, 1984Inventor: Franz Frischen
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Patent number: 4423823Abstract: In a metal container having at least one seam by which two overlapping metal edges are joined together, at least one of the edges (58) has a resilient polymeric layer (56) bonded firmly to the metal, so that when that edge (58) is seamed to a second edge (60) the polymeric layer deforms without destroying the bond, and becomes bonded to the second edge, so creating a seal against leakage. A layer of latex no greater than 0.10 mm thick may optionally be included. Seams to which the invention is applicable include swaged seams, interlocked double seams or longitudinal side seams. In the latter case the polymeric layer may provide the bond to secure a single lap seam.Type: GrantFiled: August 10, 1981Date of Patent: January 3, 1984Assignee: Metal Box LimitedInventors: Josef T. Franek, Paul Porucznik, Peter H. Serby, Christopher J. N. Tod
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Patent number: 4419158Abstract: A process for the continuous manufacture of a closable pipe slotted in the longitudinal direction which is made from a sheet of a thermoplastic foam material involves shaping the sheet in the heated thermoelastic and/or thermoplastic state at right angles to its longitudinal direction into a pipe cross section, and applying the strips of a closure, especially a slide fastener of a thermoplastic synthetic resin, to the mutually facing longitudinal edges of the pipe slot by means of welding, heat-sealing, cementing, or the like. The closure strips, prior to being joined to the shaped, still heated foam pipe, are elongated by the effect of tensile force to the same extent as the foam pipe shrinks during cooling after application of the closure to provide a straight pipe or sheath like structure with a closure means.Type: GrantFiled: September 21, 1982Date of Patent: December 6, 1983Assignee: Dynamit Nobel AktiengesellschaftInventors: Gerhard Osterhagen, Siegfried Feige
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Patent number: 4396446Abstract: An optical communication element comprises an optical fiber bonded in a state of axial compression to a metal tape. The tape may be folded up into a tube and sealed by soldering. Such elements are strong and not sensitive to stress corrosion.Such an optical communication element may be produced by passing a metal tape and an optical fiber in contact around a drum with the optical fiber on the outside. An adhesive, which solidifies or cures during the passage around the drum is applied to the metal tape.Type: GrantFiled: January 8, 1981Date of Patent: August 2, 1983Assignee: U.S. Philips CorporationInventor: Adrianus J. J. Franken
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Patent number: 4373982Abstract: Plastic film in sheet form is supplied to a forming unit which forms it into tubular form with overlapping or fin-type edges. The edges are then caused to pass along an anvil and the horn of an ultrasonic sealing unit is positioned adjacent the edges for effecting ultrasonic sealing of the edges, the edges of the film passing through a gap between the horn and the anvil. An adjustable guide wheel is provided for ensuring that the edges are guided into proper relationship for ultrasonic sealing. The apparatus includes an adjustable rigid connection between the forming unit and the ultrasonic sealing apparatus for establishing a proper relationship between the forming unit and the ultrasonic unit and for providing the necessary rigidity. In order to ensure that the ultrasonic unit is effectively energized only when the film is moving therethrough, a tachometer or other speed-sensitive device responsive to movement of the sheet film is provided.Type: GrantFiled: November 24, 1980Date of Patent: February 15, 1983Assignee: Frito-Lay, Inc.Inventors: William D. Kreager, Stanley I. Mason, Jr.
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Patent number: 4370186Abstract: The present invention relates to a method and apparatus for obtaining a metal-plastics composite tube. A layer of grafted polyethylene which comes directly into contact with the metal and a layer of cross-linkable polyethylene are extruded simultaneously at least inside this tube, with the aid of an extrusion nozzle having an annular conduit with two distinct coaxial inlets and a single outlet. The invention results in a composite tube having the malleability of lead, the rigidity of copper and a total inertia with respect to the aggressive agents flowing therein.Type: GrantFiled: December 19, 1980Date of Patent: January 25, 1983Assignee: Nadia Nicoll, Societe a responsabilite limiteeInventors: Jean-Claude Blandin, Louis Richard
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Patent number: 4353764Abstract: The invention relates to a process of forming profiles, especially tubular profiles obtained by gluing a plurality of bands of fibrous, cellulosic, metallic, plastic and other materials offset laterally relative to one another and being initially joined in an area of small width, the area of joining then being extended by a helicoidal progression to the entire perimeter of the tubular profile.Type: GrantFiled: March 9, 1981Date of Patent: October 12, 1982Inventor: Georges Sireix
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Patent number: 4344808Abstract: 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.Type: GrantFiled: December 8, 1977Date of Patent: August 17, 1982Inventors: Daniel P. Healey, Jr., Delbert L. George
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Patent number: 4331499Abstract: For the purpose of producing a packing container a web of laminated material is used, which material includes a base layer of foamed polystyrene, and two outer layers of homogeneous polystyrene.In order to seal the edge zones of the material web into a tube a part of the base layer of one of the edge zones is removed and the other edge zone is inserted into this cut off part between the remaining end parts of the outer layers and is heat-sealed to the outer layers. The so achieved sealing is tight and durable and superior to the known overlap sealing. The seal is also more pleasing from the aesthetic point of view.Type: GrantFiled: July 25, 1980Date of Patent: May 25, 1982Assignee: Tetra Pak Developpement SAInventors: Finn T. Madsen, Steffen Kjaerbye-Petersen
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Patent number: 4330351Abstract: A collapsible dispensing tube is manufactured continuously from a flat sheet or web which is formed into a cylinder having an overlapped seam which is fused together by heat. A single pressure pad containing an induction heating element applies pressure at the seam area while the seam area is heated. The pressure pad containing the source of induction heat is removed, the cylinder is advanced incrementally, and the cycle is repeated.Type: GrantFiled: January 12, 1981Date of Patent: May 18, 1982Assignee: Ethyl CorporationInventor: Lewis C. LoMaglio
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Patent number: 4327248Abstract: Tubing and electrical cable utilizing shields made from a flexible metal tape that has a coating of a copolymer of ethylene with a monomer having a reactive carboxyl group bonded to at least one of its sides and to which coating is bonded an adhesive that is adapted to bond the coating to flexible or semi-rigid non-olefinic polymeric materials so as to provide such tubing and electrical cable with improved flexibility and resistance to wrinkling or bending.Type: GrantFiled: October 6, 1980Date of Patent: April 27, 1982Assignee: Eaton CorporationInventor: Larry J. Campbell
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Patent number: 4322259Abstract: A vacuum cleaner filter bag formed from a blank including a sheet of air permeable filter paper, and which is folded to define a tubular container having closed ends with an access opening formed in the container for permitting the passage of air into the interior of the bag so that the air can be filtered. The bag is formed by folding the blank and applying adhesive material onto specific areas during the folding operation in order to form the bag. On the blank itself there is also pre-applied, by preprinting or extruding, a heat, self-stick or pressure sensitive type of adhesive material on specified areas, these areas being susceptible to tears. After the bag is formed, it is passed through a heat or pressure applying station which activates the preprinted or extruded adhesive material thereby providing reinforcement to the bag at the areas which tend to tear.Type: GrantFiled: August 7, 1980Date of Patent: March 30, 1982Assignee: Studley Paper Company, Inc.Inventor: John E. Fesco
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Patent number: 4319939Abstract: Disclosed is a method for making an electrical cable (10) which includes a plurality of insulated conductors (11) bound together in close proximity to one another to form a cablecore. A sheet of insulative material (13) surrounds this cable core and this assembly in turn is further surrounded with a conductive shield (14). An insulative sheath (16) surrounds the entire assembly. Integral with the conductive shield are means (15) for providing shield continuity when the insulative sheath and conductive shield are entered.Type: GrantFiled: October 17, 1980Date of Patent: March 16, 1982Assignee: Bell Telephone Laboratories, IncorporatedInventor: Arnold R. Smith
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Patent number: 4303032Abstract: In a can body forming process and equipment therefor, the cooling action to be added to the joining portions at the opposite ends of a can body blank is effected only at the lower part of the can forming cylinder so that said joining portions can be joined substantially without undergoing internal strain and with a higher forming accuracy.Type: GrantFiled: April 3, 1980Date of Patent: December 1, 1981Assignee: Hokkai Can Co., Ltd.Inventors: Yuzo Takahashi, Yoshinari Maeda, Yasuyuki Tanaka, Kastumi Nagai, Shiro Oyama
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Patent number: 4287011Abstract: A method of making a bond structure and a bond structure are provided that produce concurrently a peel bond and a lap bond. One end of a sheet to be joined to a second end of the same or other sheet is folded back on itself and on end of the other member inserted. The two pairs of contacting surfaces thus formed are subsequently bonded to each other. The bonding may be by any means and the clamping force across the bond during bonding need be applied from one side of the sheet only. By insuring that the peel bond fails before the material, a flat lap bond may be achieved by causing only the peel bond to fail.Type: GrantFiled: May 11, 1979Date of Patent: September 1, 1981Assignee: Radiation Dynamics, Inc.Inventor: Rodney L. Derbyshire