DE2515596A1 - METHOD AND DEVICE FOR CONNECTING OR HEMING TEXTILE SHEETS CONTAINING THERMOPLASTIC POLYMERS OR CONSISING OF SUCH - Google Patents

METHOD AND DEVICE FOR CONNECTING OR HEMING TEXTILE SHEETS CONTAINING THERMOPLASTIC POLYMERS OR CONSISING OF SUCH

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Publication number
DE2515596A1
DE2515596A1 DE19752515596 DE2515596A DE2515596A1 DE 2515596 A1 DE2515596 A1 DE 2515596A1 DE 19752515596 DE19752515596 DE 19752515596 DE 2515596 A DE2515596 A DE 2515596A DE 2515596 A1 DE2515596 A1 DE 2515596A1
Authority
DE
Germany
Prior art keywords
sheets
laser beam
laser
seaming
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19752515596
Other languages
German (de)
Inventor
Cyril George Cannon
Alan Selwood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of DE2515596A1 publication Critical patent/DE2515596A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • A41D27/245—Hems; Seams made by welding or gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1632—Laser beams characterised by the way of heating the interface direct heating the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1658—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/30—Organic material
    • B23K2103/38—Fabrics, fibrous materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4842—Outerwear

Abstract

1441067 Seaming non-metallic sheet material IMPERIAL CHEMICAL INDUSTRIES Ltd 21 March 1975 [16 April 1974] 16446/74 Heading B5K Two thermoplastic polymeric sheets are seamed together by causing the sheets to converge and directing towards the line of convergence at least one focused beam of energy from a laser. The sheets may be films or knitted woven or non-woven fabrics containing thermoplastic continuous filaments or staple fibres, e.g. crimped polyester fibres. During seaming, the sheets may be held stationary relative to each other and to the laser beam or there may be a stepwise or continuous relative movement between the laser beam and the sheets. If the laser beam is movable, its position relative to the sheets may be controlled by a programmer e.g. a punched tape or a magnetic tape. The sheets may be brought together by passing them bwtween two plates, around two bars or between two moving belts. The laser beam, which is preferably pulsed or chopped, may be oscillated over a narrow width to produce a seam comprising two or more rows of weld points. After seaming, the fabric may pass into a laser cutting device controlled by the same programmer which controls the seaming laser. As shown, apparatus for seaming together two fabrics to produce garments comprises fabric supply rolls 1, 2 and driven nip rolls 3, 4 to bring the fabrics together. Two pulsed laser beams 5, 6 are traversed along the nip 7 be tween the rolls 3, 4, the speed of the rolls 3, 4 and the positions of the beams 5, 7 being controlled by a computer. The seams form shoulder seams 10 and side seams 9 of a dress which is subsequently cut-out.

Description

PATENTANWÄLTEPATENT LAWYERS

OR.-ING. H. FINCKE DIPL-ING. H. BOHR DIPI ING. S. STAEGEROR.-ING. H. FINCKE DIPL-ING. H. BOHR DIPI ING. S. STAEGER

Patentanwalt· Dr. Reck· · !ohr · Stoegw · · Mönchen S · ΜΜΙ*η«ιαβ·Patent Attorney Dr. Reck · ·! Ohr · Stoegw · · Monks S · ΜΜΙ * η «ιαβ ·

β München β. 10. April 1975β Munich β. April 10, 1975

MOIltntrae« 31 Farnruf: (089)·24ί040 Telegramm, ι Claim· München T«l«x ι J 239 03 claim dMOIltntrae «31 Fern call: (089) 24ί040 Telegram, ι Claim · Munich T «l« x ι J 239 03 claim d

mopp.no. 23731 - Dr.P/vmopp.no. 23731 - Dr. P / v

Ktta in der Antwort angeben Ktta specify in the response

Case F.26924Case F.26924

IMPERIAL CHEMICAL INDUSTRIES LIMITED London / GroßbritannienIMPERIAL CHEMICAL INDUSTRIES LIMITED London / Great Britain

"Verfahren und Vorrichtung zum Verbinden oder Säumen von Textilbahnen, welche thermoplastische Polymere enthalten oder aus solchen bestehen""Method and device for joining or hemming textile webs which are thermoplastic Contain or consist of polymers "

Priorität: 16. April 1974 - Großbritannien - Nr. 16446/74 Priority: April 16, 1974 - Great Britain - No. 16446/74

Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Verbinden oder Säumen von Textilbahnen, welche aus thermoplastischen Polymeren bestehen oder solche enthalteneThe present invention relates to a method and a device for joining or hemming textile webs made of thermoplastic polymers or those included

5098U/03555098U / 0355

MQlMQl

KhM, Konto «Χ 404 · ridottoni M«nd>in 27044-eWKhM, account "Χ 404 · ridottoni M" nd> in 27044-eW

Unter der Bezeichnung "Textilbahnen, welche aus thermoplastischen Polymeren bestehen" werden Folien verstanden, welche aus thermoplastischen Polymeren hergestellt sind, sowie Textilstoffe, wie beispielsweise gewirkte, gewebte oder nicht-gewebte Textilstoffe, welche aus Fasern aus thermoplastischen Polymeren bestehen. Vorzugsweise enthalten die Textilstoffe mindestens 5 Gew.-Jt thermoplastische Fasern, vorzugsweise mindestens 20 Gew.-Ϊ solcher Fasern, und besonders zweckmäßig ist es, wenn die Textilstoffe vollkommen aus solchen Fasern bestehen. Unter der Bezeichnung "Fasern" werden sowohl kontinuierliche Fäden als auch Stapelfasern verstanden.The term "textile webs, which consist of thermoplastic polymers" is understood to mean films, which are made from thermoplastic polymers, as well as fabrics such as knitted, woven or non-woven fabrics, which are made from fibers of thermoplastic polymers exist. Preferably the fabrics contain at least 5 parts by weight of thermoplastic fibers, preferably at least 20% by weight of such fibers, and it is particularly useful if the textile fabrics are completely consist of such fibers. The term "fibers" includes both continuous filaments and also understood staple fibers.

Es ist bekannt, ein Wärmeschmelzverfahren anzuwenden, um Bahnen zu säumen oder zu verbinden, welche au3 thermoplastischen Polymeren bestehen, wie beispielsweise Textilstoffe, welche aus Fäden oder gesponnenen Fasern aus thermoplastischen Polymeren bestehen. Bei einem solchen Verfahren müssen die Schmelzbedingungen sehr genau geregelt werden, weil anderenfalls Tropfen von geschmolzenem Polymer gebildet werden, welche zu Säumen oder Verbindungen führen können, welche nur eine schlechte Querfestigkeit besitzen. Weiterhin wird bei einer in dieser Weise hergestellten Schweißverbindung bei einem Textilstoff das Polymer durch die ganze Stärke des Textilstoffes geschmolzen, und die Oberflächentextur des Textilstoffes wird entlang des Saumes zerstört.It is known to use a heat fusing process to seam or join webs which are thermoplastic Polymers, such as fabrics, are made up of threads or spun Fibers consist of thermoplastic polymers. In such a process, the melting conditions very precisely controlled, because otherwise drops of molten polymer are formed which lead to Seams or connections can lead, which only have poor transverse strength. Farther If a welded connection is made in this way in a textile material, the polymer will penetrate all the thickness of the fabric is melted, and the surface texture of the fabric is along of the hem destroyed.

Erfindungsgemäß wird nunmehr ein Verfahren zum Versäumen oder Verbinden von zwei Bahnen vorgeschlagen, welche aus thermoplastischen Polymeren bestehen, und dasAccording to the invention, a method is now proposed for seaming or joining two webs, which consist of thermoplastic polymers, and that

509844/0355509844/0355

darin besteht, daß ein Teil der einen Bahn mit einem Teil der anderen Bahn zusammengebracht werden und entlang ihrer Berührungslinie ein scharf gebündelter Laserenergiestrahl gerichtet wird.is that part of one path with a Part of the other web are brought together and a sharply bundled one along their line of contact Laser energy beam is directed.

Vorzugsweise werden die Bahnen entlang einer Linie oder in der Nähe einer Berührungslinie zusammengepreßt, so daß auf diese Weise die Oberflächen der beiden Bahnen innig miteinander in Berührung kommen. Hierdurch wird erreicht, daß diejenigen Teile der Oberflächen der Bahnen, die durch die Einwirkung des Laserstrahles erweicht werden, während sie sich in dem erweichten Zustand befinden, zusammengebracht werden, um eine kräftige Verbindung oder einen festen Saum zu ergeben.Preferably, the webs are pressed together along a line or in the vicinity of a line of contact, so that in this way the surfaces of the two webs come into intimate contact with one another. This ensures that those parts of the surfaces of the webs, which by the action of the Laser beam are softened while they are in the softened state, brought together to create a strong joint or a tight seam.

Zweckmäßig pulsiert der Laserstrahl oder ist zerhackt, so daß die Energie der Pulsierung ausreichend ist, um mindestens einen Teil der aneinanderliegenden Oberflächen der Bahnen zu schmelzen, jedoch unzureichend ist, um vollkommen durch die Bahnen hindurchzudringen, so daß auf diese Weise die Oberflächentextur des Textilstoff es im Bereich des Saumes erhalten wird.The laser beam expediently pulsates or is chopped so that the energy of the pulsation is sufficient to to melt at least part of the abutting surfaces of the webs, but insufficiently is to penetrate completely through the webs, so that in this way the surface texture of the fabric it is obtained in the area of the hem.

Während der Säumungs- oder Verbindungsbehandlung können die beiden Bahnen stationär mit Bezug aufeinander und zu dem Laserstrahl gehalten werden, oder es kann eine schrittweise oder kontinuierliche Relativbewegung zwischen dem Laserstrahl und den Bahnen erfolgen. Die beiden Bahnen können durch irgendein geeignetes Verfahren zusammengebracht werden, vorausgesetzt, daß die Berührungslinie der beiden Bahnen ausreichend freigelegt ist, so daß der Laserstrahl zu der BerührungslinieDuring trimming or joining treatment, you can the two tracks can be held stationary with respect to each other and to the laser beam, or one take place stepwise or continuous relative movement between the laser beam and the tracks. the both webs can be brought together by any suitable method provided that the Line of contact of the two tracks is sufficiently exposed so that the laser beam to the line of contact

509844/0355509844/0355

vordringen kann. So können beispielsweise die Bahnen in der Weise zusammengebracht werden, daß sie zwischen zwei Platten hindurchlaufen, um zwei Stangen herumgeführt oder zwischen zwei sich bewegenden Bändern geführt ,werden. Vorzugsweise werden die Bahnen durch ein Paar einstellbarer Druckwalzen geführt, wobei mindestens eine der Bahnen um einen Teil der ihr zugeordneten Walze geführt wird, bevor sie in den Walzenspalt eintritt, um so die Berührungslinie der beiden Bahnen entsprechend freizulegen. Der Laserstrahl wird in diesem Falle in den Spalt der Walzen hineingerichtet. can advance. For example, the webs can be brought together in such a way that they are between pass through two plates, around two rods or between two moving belts ,will. Preferably, the webs are fed through a pair of adjustable pressure rollers, wherein at least one of the webs is guided around a part of the roller assigned to it before it enters the roller gap occurs in order to expose the line of contact between the two tracks accordingly. The laser beam in this case is directed into the gap between the rollers.

Gemäß einem weiteren Merkmal der Erfindung wird ein Verfahren zum Versäumen von zwei Bahnen unter Verwendung eines Walzenpaares vorgeschlagen, wobei mindestens eine der Bahnen um einen Teil der ihr zugeordneten Walze herumgeführt wird, bevor sie in den Walzenspalt gelangt, und wobei mindestens ein Laserstrahl gegen die Berührungslinie der beiden Bahnen gerichtet wird.According to a further feature of the invention, a method of hemming two webs is used a pair of rollers proposed, with at least one of the tracks around a part of it assigned Roll is guided around before it gets into the nip, and at least one laser beam is directed against the line of contact between the two tracks.

Abhängig von der Kompliziertheit der erforderlichen Saumform können ein oder mehrere Laserstrahlen verwendet werden, wobei diese Strahlen entweder feststehend angeordnet oder geeignet sind, quer entlang der Berührungslinie der Bahnen bewegt zu werden. Wenn mit einem sich bewegenden Laserstrahl gearbeitet wird, kann die Geschwindigkeit der Quetschwalzen und die Bewegung des Laserstrahls mit Bezug auf die Bahnen durch eine Programmiervorrichtung gesteuert werden, beispielsweise durch ein Lochband oder ein Magnetband, um auf diese Weise kompliziert geformte Säume, beispielsweise gebo-Depending on the complexity of the seam shape required, one or more laser beams can be used These beams are either fixedly arranged or suitable, transversely along the line of contact of the tracks to be moved. When working with a moving laser beam, the Speed of the nip rollers and the movement of the laser beam with respect to the webs by a programming device can be controlled, for example by a perforated tape or a magnetic tape, in order to access this Complicated hems, for example curved

509844/0355509844/0355

gene Säume, herzustellen.good hems.

Der Laserstrahl kann, insbesondere, wenn er pulsiert oder abgehackt ist, über einer geringen Breite oszillieren, um auf diese Weise einen Saum zu erzeugen, der aus zwei oder mehreren Schweißpunktreihen besteht.The laser beam can oscillate over a small width, especially if it is pulsating or choppy, in order to create a seam that consists of two or more rows of spot welds.

Wenn es erforderlich ist, den Textilstoff nach der Säumbehandlung zu beschneiden, so kann der gesäumte Textilstoff, nachdem er den Walzenspalt verlassen hat, einer entsprechenden Schneidvorrichtung zugeführt werden. Eine Laserstrahl-Schneidvorrichtung ist besonders geeignet, weil in diesem Falle der Laserstrahl oder die Laserstrahlen durch die gleiche Programmiervorrichtung gesteuert werden können, welche den Säumlaserstrahl oder die Säumlaserstrahlen und die Quetschwalzen-Umlaufgeschwindigkeit steuert.If it is necessary to trim the fabric after the hemming treatment, the hemming can be used Textile fabric, after it has left the nip, fed to a corresponding cutting device will. A laser beam cutting device is particularly suitable because in this case the laser beam or the laser beams can be controlled by the same programming device as the seaming laser beam or controls the seaming laser beams and the squeegee roller revolution speed.

Das den Gegenstand der Erfindung bildende Verfahren ist besonders geeignet zum Säumen von gewebten, gewirkten oder nicht-gewebten Textilstoffen bei der Herstellung von Kleidungsstücken, wie beispielsweise Gewändern, Kitteln, Jacken und Hosen, wobei die erfindungsgemäße Säumung die sonst übliche Nähbehandlung ersetzt. Das erfindungsgemäße Verfahren ist besonders geeignet zur Massenherstellung von Kleidungsstücken, welche durch einen Computer gesteuert wird.The method forming the subject of the invention is particularly suitable for hemming woven, knitted fabrics or non-woven fabrics in manufacture of garments, such as robes, smocks, jackets and trousers, the invention Heming replaces the usual sewing treatment. The inventive method is particularly suitable for Mass production of garments controlled by a computer.

Gemäß einem weiteren Merkmal der Erfindung wird eine Vorrichtung zum Versäumen von zwei Bahnen aus thermoplastischen Polymeren vorgeschlagen, wobei in dieser Vorrichtung Einrichtungen zum Zusammenbringen von einem Teil der einen Bahn mit einem Teil der anderen Bahn vorge-According to a further feature of the invention there is provided an apparatus for hemming two webs of thermoplastic Polymers proposed, in this device means for bringing together a part one lane with part of the other lane.

509844/0355509844/0355

sehen sind, um eine Berührungslinie zu ergeben, und wobei ein Laserstrahl vorgesehen ist, welcher einen gebündelten Energiestrahl gegen eine Linie richtet welche der Berührungslinie der beiden Bahnen entspricht. are seen to give a line of contact and a laser beam is provided which has a The bundled energy beam is directed against a line which corresponds to the line of contact between the two tracks.

Durch das erfindungsgemäße Verfahren hergestellte Säume können sehr schmal sein, aus einer einzigen Schweißnaht oder aus einer einzigen Reihe von Schweißpunkten bestehen, oder sie können aus einer Anzahl von nebeneinanderliegenden Schweißnähten oder Reihen von Schweißpunkten bestehen. Da nur eine der einander gegenüberliegenden Oberflächen der Bahnen dem Laserstrahl ausgesetzt wird, sind auf den äußeren Oberflächen der gesäumten Bahnen keine Tropfen des geschmolzenen Polymers sichtbar. Säume, welche bei einem Textilstoff durch das erfindungsgemäße Verfahren hergestellt worden sind, besitzen besondere Vorteile gegenüber Säumen, welche durch die üblichen Schweiß- und Schmelzmethoden erzeugt worden sind. Da somit der Textilstoff an den äußeren Oberflächen desselben nicht geschmolzen ist, werden Zugbeanspruchungen über eine breite Fläche verteilt, wenn diese auf einen Saum ausgeübt werden, so daß auf diese Weise auch die Festigkeit der Verbindung erhöht wird.Hems produced by the method of the invention can be very narrow, from a single one Weld or consist of a single series of weld points, or they can consist of a number of adjacent welds or rows of spot welds exist. Because only one of the opposite Surfaces of the webs exposed to the laser beam are on the outer surfaces of the No drops of the molten polymer are visible in the seamed lanes. Hems, which on a textile fabric have been produced by the process according to the invention have particular advantages over hems, which have been produced by the usual welding and melting methods. As the textile fabric is not melted on the outer surfaces of the same, tensile stresses are applied over a wide area distributed when these are applied to a hem, so that in this way also the strength of the connection is increased.

Wenn durch das erfindungsgemäße Verfahren offene Enden aufweisende Säume, beispielsweise bei einer aufgesetzten Tasche, hergestellt werden, ist es zweckmäßig, die Enden der Säume noch besonders zu schließen, beispielsweise durch Punktschweißen oder Vernähen.If the method according to the invention results in hems having open ends, for example in the case of an attached Bag, it is useful to close the ends of the hems especially, for example by spot welding or sewing.

Auf der beigefügten Zeichnung ist schematisch eine Vor-On the attached drawing is a schematic representation

509844/0355509844/0355

richtung dargestellt, auf der das erfindungsgemäße Verfahren durchgeführt werden kann.direction shown on which the inventive method can be carried out.

Die dargestellte Vorrichtung ist zum Versäumen oder Verbinden von zwei Textilstoffen geeignet, welche aus thermoplastischen Fäden oder Pasern bestehen, und zwar in der Weise, daß die verbundenen Textilstoff e dann zerschnitten werden können, um zum Teil geformte Kleidungsstücke zu ergeben. Die Vorrichtung besteht aus zwei Vorratsrollen 1 und 2 und weiteren Walzen 3 und 4, welche einen Walzenspalt bilden, den der Textilstoff durchläuft, um dann durch auf der Zeichnung nicht dargestellte Vorrichtungen aufgenommen werden zu können. In den Walzenspalt hinein erstrecken sich zwei pulsierende Laserstrahlen 5 und 6. Das Walzenpaar 3 und 4 wird durch einen Elektromotor angetrieben, welcher auf der Zeichnung nicht dargestellt ist, und die Laserstrahlen 5 und 6 bewegen sich durch auf der Zeichnung nicht dargestellte Vorrichtungen entlang dem Spalt 7> wobei die Geschwindigkeit des Walzenumlaufes und die jeweilige Stellung des Laserstrahls durch einen auf der Zeichnung nicht dargestellten Computer gesteuert werden.The device shown is suitable for hemming or joining two fabrics, which consist of thermoplastic threads or fibers, in such a way that the connected textile material e can then be cut to give partially molded garments. The device consists of two supply rolls 1 and 2 and further rolls 3 and 4, which form a nip, which the textile fabric passes through to then recorded by devices not shown in the drawing to be able to. Two pulsating laser beams 5 and 6 extend into the nip. The pair of rollers 3 and 4 is driven by an electric motor, which is not shown in the drawing, and the laser beams 5 and 6 move by devices not shown in the drawing along the Gap 7> where the speed of the roller revolution and the respective position of the laser beam through a computer not shown in the drawing can be controlled.

Der Textilstoff wird durch das Walzenpaar 3 und 4 mit einer geregelten Geschwindigkeit hindurchgeführt, und die Stellung der Laserstrahlen 5 und 6 sowie die Steuerung ihrer Wirksamkeit wird derart geregelt, daß der Textilstoff 8 gesäumt wird, welcher, wenn er später zugeschnitten wird, ein zum Teil geformtes Bekleidungsstück bildet, wobei die Versäumung 10 die Schulterteile und die Versäumung 9 die Seitenteile des Bekleidungsstückes bilden.The fabric is passed through the pair of rollers 3 and 4 at a regulated speed, and the position of the laser beams 5 and 6 and the control of their effectiveness is regulated so that the Fabric 8 is hemmed, which, when later cut, is a partially molded garment forms, the edging 10 the shoulder parts and the edging 9 the side parts of the garment form.

509844/0355509844/0355

Eine Vorrichtung, wie sie auf der Zeichnung dargestellt ist, mit der Abwandlung, daß dabei nur ein einziger feststehender Laserstrahl verwendet wurde, diente dazu, verschiedene Arten von Textilstoffen zu verbinden oder zu versäumen. Hierbei wurde ein "abgehackter" Strahl aus einem CO_-Laser von etwa 50 Watt verwendet, und der Textilstoff wurde durch das Walzenpaar mit einer solchen Geschwindigkeit geführt, daß auf 25 mm 5 bis 6 Verbindungspunkte hergestellt wurden. Die Festigkeit der Saumverbindung wurde mittels einer Instron-Zugfestigkeitsprüfmaschine für die in der folgenden Tabelle angegebenen Textilstoffe untersucht.A device as shown in the drawing, with the modification that there is only one Fixed laser beam was used to join or to connect different types of textile fabrics to miss. A "chopped off" beam from a CO_ laser of about 50 watts was used, and the fabric was passed through the pair of rollers at such a speed that on 25 mm 5 to 6 connection points were made. The seam joint strength was measured using an Instron tensile tester investigated for the fabrics indicated in the following table.

Art des TextilstoffesType of fabric Festigkeit der
Verbindung
(g/25 mm)Strength of
link
(g / 25 mm) 40 Gauge Raschel-Gewirk aus l6j dtex f 30
CRIMPLENE und 15 tex χ 2 gesponnenem Kamm
garn, 100 % Wolle (173 g/m2)
Kettgewirktes Nylon (115,3 g/m2)
Kettgewirktes 167 dtex f 30 CRIMPLENE
(223,8 g/m2)
Kettgewirktes CRIMPLENE/Nylon Jaspe1/
CRIMPLENE (84,7 g/m2)
Nylon (135,6 g/m2)
Gewebter Textilstoff TERYLENE/CRIMPLENE
142,4 g/m2)
Kettgewirktes 100 % TERYLENE (149,2 g/m2)
Kettgewirkter Textilstoff aus CRIMPLENE/
Nylon Jaspe1, CRIMPLENE, TERYLENE und
Nylon (108,5 g/m2)40 gauge Raschel knitted fabric made of l6j dtex f 30
CRIMPLENE and 15 tex χ 2 spun comb
yarn, 100 % wool (173 g / m 2 )
Warp knitted nylon (115.3 g / m 2 )
Warp-knitted 167 dtex f 30 CRIMPLENE
(223.8 g / m2)
Warp-knitted CRIMPLENE / Nylon Jaspe 1 /
CRIMPLENE (84.7 g / m 2 )
Nylon (135.6 g / m 2 )
Woven fabric TERYLENE / CRIMPLENE
142.4 g / m 2 )
Warp-knitted 100 % TERYLENE (149.2 g / m 2 )
Warp-knitted fabric made from CRIMPLENE /
Nylon Jaspe 1 , CRIMPLENE, TERYLENE and
Nylon (108.5 g / m 2 ) 1300
2173
990
623
2272
2542
1642
12001300
2173
990
623
2272
2542
1642
1200

("CRIMPLENE" und "TERYLENE" sind eingetragene Warenzeichen für thermoplastische Polymere in Faden- oder Faserform.)("CRIMPLENE" and "TERYLENE" are registered trademarks for thermoplastic polymers in thread or fiber form.)

509844/0355 Patentansprüche: 509844/0355 claims:

Claims (4)

PATENTANSPRÜCHEPATENT CLAIMS 1. Verfahren zum Versäumen oder Verbinden von zwei Bahnen aus thermoplastischen Polymeren, indem diese der Einwirkung eines gebündelten Energiestrahls eines Lasers ausgesetzt werden, dadurch gekennzeichnet, daß ein Teil der einen Bahn mit einem Teil der anderen Bahn zusammengebracht wird, um eine Berührungslinie zu bilden, und der Laserstrahl gegen die Berührungslinie gerichtet wird.1. Method of seaming or joining two sheets of thermoplastic polymers by these are exposed to the action of a bundled energy beam from a laser, thereby characterized in that part of one web is brought together with part of the other web, to form a line of contact, and the laser beam is directed against the line of contact. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Energie des Laserstrahls ausreichend ist, um mindestens einen Teil der aneinanderanliegenden Oberflächen der Bahnen zu schmelzen, jedoch unzureichend ist, um durch die Bahnen hindurchzudringen.2. The method according to claim 1, characterized in that the energy of the laser beam is sufficient to melt at least part of the abutting surfaces of the webs, but insufficiently is to penetrate through the webs. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bahnen dadurch zusammengebracht werden, daß sie durch ein Walzenpaar geführt werden und der Laserstrahl gegen die Berührungslinie der Bahnen gerichtet wird, wobei die Geschwindigkeit des Walzenpaares und die Stellung des Laserstrahls mit Bezug auf die Bahnen durch eine Programmiervorrichtung gesteuert werden.3. The method according to claim 1, characterized in that the webs are brought together in that they are guided by a pair of rollers and the laser beam against the contact line of the webs is directed, the speed of the pair of rollers and the position of the laser beam with Regarding the trajectories can be controlled by a programming device. 4. Vorrichtung zum Versäumen oder Verbinden von zwei Bahnen aus thermoplastischen Polymeren mit einer Laservorrichtung zur Erzeugung eines gebündelten Energiestrahls und einer Vorrichtung, durch die die Bahnen der Einwirkung des Laserstrahls ausgesetzt werden, dadurch gekennzeichnet, daß die4. Device for seaming or joining two webs of thermoplastic polymers with one Laser device for generating a bundled energy beam and a device through which the tracks are exposed to the action of the laser beam, characterized in that the 509844/0355509844/0355 Bahnen durch ein Walzenpaar (3 und 4) zusammenge bracht und der Laserstrahl gegen den Spalt des Walzenpaares gerichtet ist.Tracks brought together by a pair of rollers (3 and 4) and the laser beam against the gap of the Roller pair is directed. mat, aw.-»», η. mat, aw.- »», η. WC4N& I. STABKPWC4N & I. STABKP 509844/0355509844/0355
DE19752515596 1974-04-16 1975-04-10 METHOD AND DEVICE FOR CONNECTING OR HEMING TEXTILE SHEETS CONTAINING THERMOPLASTIC POLYMERS OR CONSISING OF SUCH Pending DE2515596A1 (en)

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GB1644674A GB1441067A (en) 1974-04-16 1974-04-16 Seaming process

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JP (1) JPS50145478A (en)
CA (1) CA1036475A (en)
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FR (1) FR2267870A1 (en)
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NL (1) NL7504267A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4111661A1 (en) * 1991-04-10 1992-10-15 Renk Ag Planetary gear with central cylindrical spur wheel - has external teeth and has cylindrical hollow wheel with inner teeth, and flexible ring
EP1920905A1 (en) * 2006-11-09 2008-05-14 ProLas GmbH Process for welding flat materials by laser
DE102011101484A1 (en) * 2011-05-13 2012-11-15 Andreas Reiss Method for manufacturing piece of cloth e.g. T-shirt, involves sectioning material webs according to production pattern along sectional line, where connected and sectioned material webs form front-and rear sides of piece of cloth

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE413998B (en) * 1975-10-24 1980-07-07 Union Carbide Corp CONTINUED TO CONTINUOUSLY WELDABLE SUSPENSIBLE BANDS OF METAL SHEET MATERIAL
WO1980001775A1 (en) * 1979-02-22 1980-09-04 Battelle Development Corp Welding of a textile material and process for welding such material
DE4021341A1 (en) * 1990-07-04 1992-01-16 Hymmen Theodor Gmbh METHOD AND DEVICE FOR CONTINUOUSLY OR DISCONTINUOUSLY PRODUCING PLANES, PLATE-SHAPED MULTILAYERED MATERIALS, LAMINATES OR THE LIKE.
GB2271312A (en) * 1992-10-08 1994-04-13 Forward Engineering Limited Welding using radiant heat
DE19961361A1 (en) * 1999-12-17 2001-07-12 Lemo Maschb Gmbh Device for the assembly of moving plastic film webs
DE102007049362A1 (en) * 2007-10-09 2009-04-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method and device for welding at least two layers of a polymeric material with laser radiation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4111661A1 (en) * 1991-04-10 1992-10-15 Renk Ag Planetary gear with central cylindrical spur wheel - has external teeth and has cylindrical hollow wheel with inner teeth, and flexible ring
EP1920905A1 (en) * 2006-11-09 2008-05-14 ProLas GmbH Process for welding flat materials by laser
DE102011101484A1 (en) * 2011-05-13 2012-11-15 Andreas Reiss Method for manufacturing piece of cloth e.g. T-shirt, involves sectioning material webs according to production pattern along sectional line, where connected and sectioned material webs form front-and rear sides of piece of cloth

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AU7992775A (en) 1976-10-14
GB1441067A (en) 1976-06-30
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CA1036475A (en) 1978-08-15
NL7504267A (en) 1975-10-20
FR2267870A1 (en) 1975-11-14

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