GB1210029A - Method and apparatus for making tubes - Google Patents

Method and apparatus for making tubes

Info

Publication number
GB1210029A
GB1210029A GB38793/69A GB3879369A GB1210029A GB 1210029 A GB1210029 A GB 1210029A GB 38793/69 A GB38793/69 A GB 38793/69A GB 3879369 A GB3879369 A GB 3879369A GB 1210029 A GB1210029 A GB 1210029A
Authority
GB
United Kingdom
Prior art keywords
belt
platens
tube
adhesive
band
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.)
Expired
Application number
GB38793/69A
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.)
Rothmans Benson and Hedges Inc
Original Assignee
Rothmans of Pall Mall Canada 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 Rothmans of Pall Mall Canada Ltd filed Critical Rothmans of Pall Mall Canada Ltd
Publication of GB1210029A publication Critical patent/GB1210029A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/0003Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
    • B31F1/0045Bending or folding combined with joining
    • B31F1/0048Bending plates, sheets or webs at right angles to the axis of the article being formed and joining the edges
    • B31F1/0061Bending plates, sheets or webs at right angles to the axis of the article being formed and joining the edges for making articles of indefinite length
    • B31F1/0067Bending plates, sheets or webs at right angles to the axis of the article being formed and joining the edges for making articles of indefinite length using only external forming surfaces, e.g. sleeves
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24CMACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/46Making paper tubes for cigarettes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/49Internally supporting the, e.g. tubular, article during joining
    • B29C66/494Internally supporting the, e.g. tubular, article during joining using an inflatable core
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63Internally supporting the article during joining
    • B29C66/632Internally supporting the article during joining using a fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8221Scissor or lever mechanisms, i.e. involving a pivot point
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828Other pressure application arrangements
    • B29C66/8286Hand placed clamps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8324Joining or pressing tools pivoting around one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/87Auxiliary operations or devices
    • B29C66/876Maintenance or cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31CMAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C3/00Making tubes or pipes by feeding obliquely to the winding mandrel centre line
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36Bending and joining, e.g. for making hollow articles
    • B29C53/38Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815Hot melt adhesives, e.g. thermoplastic adhesives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4825Pressure sensitive adhesives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/02Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024Thermal pre-treatments
    • B29C66/0242Heating, or preheating, e.g. drying

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

1,210,029. Forming tubes. ROTHMANS OF PALL MALL CANADA Ltd. 1 Aug., 1969 [19 June, 1969], No. 38793/69. Heading F2P. A continuous band 54, having adhesive material adjacent one edge is formed into a tube by being fed into a continuous belt 48 curled into cylindrical form by curling means, e.g. platens 28-30 (Fig. 5). The band is pressed outwards against the belt, with the opposite edges overlapping and the adhesive sandwiched between them, by compressed gas introduced through holes 60 (Fig. 2, not shown) in tube 58, the loss of gas being limited by bands (62). If heat sensitive adhesive is used the width of the belt is such that its edges 50 do not meet, leaving a gap for heating element 26, which fits into the channel between platens 29 and 30. The overlapping band sections, with the adhesive sandwiched between, are pressed against elements 26, and sealed together, thus forming the tube. Where pressure sensitive adhesive is used, the heating element is dispensed with, platens 29 and 30 are replaced by platen 66 (Fig. 6, not shown) and belt 48 has sufficient width to form a complete cylinder.
GB38793/69A 1969-06-19 1969-08-01 Method and apparatus for making tubes Expired GB1210029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA54724 1969-06-19

Publications (1)

Publication Number Publication Date
GB1210029A true GB1210029A (en) 1970-10-28

Family

ID=4085365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38793/69A Expired GB1210029A (en) 1969-06-19 1969-08-01 Method and apparatus for making tubes

Country Status (4)

Country Link
CA (1) CA848404A (en)
DE (1) DE1952001C2 (en)
FR (1) FR2052249A5 (en)
GB (1) GB1210029A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051271A1 (en) * 2000-01-11 2001-07-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device and method for producing tubes
WO2009083240A1 (en) * 2007-12-28 2009-07-09 Philip Morris Products S.A. Filter tube making
IT201600077839A1 (en) * 2016-07-25 2018-01-25 Gambini Spa APPARATUS AND METHOD FOR THE APPLICATION OF GLUE TO A TAPE AND PIPE INCLUDING THE APPARATUS.
CN108371342A (en) * 2017-02-01 2018-08-07 虹霓机械制造有限公司 The method of item for manufacturing the tobacco industry and building mortion
EP3636424A3 (en) * 2018-10-11 2020-05-27 G.D. S.p.A Method and machine for making multilayer tubes for tobacco industry products

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022918B4 (en) * 2009-05-27 2020-11-19 isoplus Fernwärmetechnik GmbH Welding device
CN114801207B (en) * 2022-05-27 2024-01-02 北京中科九章科技有限公司 Butt welding machine for hot-melting sleeve plastic plate

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001051271A1 (en) * 2000-01-11 2001-07-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device and method for producing tubes
WO2009083240A1 (en) * 2007-12-28 2009-07-09 Philip Morris Products S.A. Filter tube making
US8142598B2 (en) 2007-12-28 2012-03-27 Philip Morris Usa Inc. Filter tube making
IT201600077839A1 (en) * 2016-07-25 2018-01-25 Gambini Spa APPARATUS AND METHOD FOR THE APPLICATION OF GLUE TO A TAPE AND PIPE INCLUDING THE APPARATUS.
EP3275641A1 (en) * 2016-07-25 2018-01-31 GAMBINI S.p.A. Apparatus and method for unwinding a band and applying glue thereto
CN108371342A (en) * 2017-02-01 2018-08-07 虹霓机械制造有限公司 The method of item for manufacturing the tobacco industry and building mortion
EP3357354A1 (en) * 2017-02-01 2018-08-08 Hauni Maschinenbau GmbH Strand forming device and method of producing a strand in the tobacco-processing industry
CN108371342B (en) * 2017-02-01 2022-06-24 虹霓机械制造有限公司 Method for producing a rod for the tobacco processing industry and rod-forming device
EP3636424A3 (en) * 2018-10-11 2020-05-27 G.D. S.p.A Method and machine for making multilayer tubes for tobacco industry products

Also Published As

Publication number Publication date
FR2052249A5 (en) 1971-04-09
CA848404A (en) 1970-08-04
DE1952001B1 (en) 1971-05-06
DE1952001C2 (en) 1979-05-17

Similar Documents

Publication Publication Date Title
GB1029986A (en) Method and apparatus for hot embossing continuous webs
ES420066A1 (en) Method and apparatus for freely suspending moving webs of material
GB1210029A (en) Method and apparatus for making tubes
ES438921A1 (en) Segmented heater for band sealers
GB1075869A (en) Continuous heat sealing and cutting apparastus
ES385264A1 (en) Procedure and apparatus for the obtaining of plates and thermoplastic láminas. (Machine-translation by Google Translate, not legally binding)
FR1424109A (en) Face-to-face fixing methods of two parts of a flat band, in particular strapping, and new products thus obtained
FR1580024A (en)
GB745628A (en) Methods of manufacturing laminated belting
GB944070A (en) Process and apparatus for sealing bread wrappers
SE7504887L (en) PRESSURE FOR EXTERNAL PRESSURE.
GB938337A (en) Apparatus for the production of infusion bags
ES370027A1 (en) Welding apparatus
ES421825A1 (en) Apparatus for the continuous manufacture of pressed panels for loose materials
GB1431742A (en) Sheet web and like material handling apparatus
GB927980A (en) Method and means for manufacturing pipes from continuous material in the form of bands or strips
GB1353447A (en) Method for the continuous longitudinal corrugation of sheets of thermoplastic material and corrugated sheets obtained thereby
GB1328930A (en) Sealing arrangement for pressurised gas or vapour containers for material webs which are to be continuously treated
GB1393084A (en) Heat sealing apparatus
ES435547A1 (en) Heat sealing apparatus
ES406049A1 (en) Textile printing apparatus
GB1098946A (en) Improvements relating to the production of thermoplastic sheeting
FR2217151A1 (en) Continuous chipboard prodn using steel bands - the mat being heated by heated bands before pressing
FR2310855A1 (en) Hot welding of a plastics strip esp. a flat tube - includes holding the strip curved and spaced from the welding location and detensioning it before the welding operation (BE161176)
GB989369A (en) Improvements in and relating to sealing thermoplastic material

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee