FR2441476B1 - - Google Patents

Info

Publication number
FR2441476B1
FR2441476B1 FR7925813A FR7925813A FR2441476B1 FR 2441476 B1 FR2441476 B1 FR 2441476B1 FR 7925813 A FR7925813 A FR 7925813A FR 7925813 A FR7925813 A FR 7925813A FR 2441476 B1 FR2441476 B1 FR 2441476B1
Authority
FR
France
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
FR7925813A
Other languages
French (fr)
Other versions
FR2441476A1 (en
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.)
RAG AG
Original Assignee
Ruhrkohle AG
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 Ruhrkohle AG filed Critical Ruhrkohle AG
Publication of FR2441476A1 publication Critical patent/FR2441476A1/en
Application granted granted Critical
Publication of FR2441476B1 publication Critical patent/FR2441476B1/fr
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
    • E21F1/04—Air ducts
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/22—Corrugating
    • B29C53/30—Corrugating of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/0003—Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
    • B31F1/0006—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof
    • B31F1/0032—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/111—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall with homogeneous wall

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Duct Arrangements (AREA)
  • Cartons (AREA)
  • Materials For Medical Uses (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
FR7925813A 1978-11-20 1979-10-17 METHOD FOR PLEATING PLASTIC AIR NOZZLES Granted FR2441476A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2850267A DE2850267C2 (en) 1978-11-20 1978-11-20 Method of folding plastic tubes

Publications (2)

Publication Number Publication Date
FR2441476A1 FR2441476A1 (en) 1980-06-13
FR2441476B1 true FR2441476B1 (en) 1984-04-06

Family

ID=6055134

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7925813A Granted FR2441476A1 (en) 1978-11-20 1979-10-17 METHOD FOR PLEATING PLASTIC AIR NOZZLES

Country Status (4)

Country Link
DE (1) DE2850267C2 (en)
FR (1) FR2441476A1 (en)
GB (1) GB2035505B (en)
NO (1) NO793732L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264044B (en) * 1993-02-04 1996-09-09 CONVEYOR SLEEVE.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB672960A (en) * 1948-11-04 1952-05-28 Gen Motors Corp Improved machine for folding sheet material into bellows
GB680263A (en) * 1949-09-12 1952-10-01 Gen Motors Corp Improved machine for folding sheet material into bellows
DE842588C (en) * 1950-01-24 1952-06-30 Gen Motors Corp Method and machine for folding bellows
DE965485C (en) * 1951-05-26 1957-06-13 Hans Georg Schauenburg Harmonica-like foldable weather flute
US3339004A (en) * 1966-03-16 1967-08-29 Sweetheart Plastics Forming of flexible drinking straws

Also Published As

Publication number Publication date
NO793732L (en) 1980-05-21
GB2035505B (en) 1982-11-17
GB2035505A (en) 1980-06-18
FR2441476A1 (en) 1980-06-13
DE2850267A1 (en) 1980-06-04
DE2850267C2 (en) 1983-01-13

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Legal Events

Date Code Title Description
ST Notification of lapse