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GR1003001B - Spiral tube wavelike internal and external surface and method for its production - Google Patents

Spiral tube wavelike internal and external surface and method for its production

Info

Publication number
GR1003001B
GR1003001B GR970100396A GR970100396A GR1003001B GR 1003001 B GR1003001 B GR 1003001B GR 970100396 A GR970100396 A GR 970100396A GR 970100396 A GR970100396 A GR 970100396A GR 1003001 B GR1003001 B GR 1003001B
Authority
GR
Greece
Prior art keywords
wavelike
internal
tube
external surface
production
Prior art date
Application number
GR970100396A
Other languages
Greek (el)
Inventor
.
Original Assignee
�.�. ���������� �.�.
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 �.�. ���������� �.�. filed Critical �.�. ���������� �.�.
Publication of GR1003001B publication Critical patent/GR1003001B/en

Links

Abstract

Spiral tube for the reception and protection of electric cables and optical fibre cables with wavelike internal and external surface made of thermoplastic synthetic material. A typical tube is produced by extrusion and is extremelly grabbed by metallic jaws which form a mould which shapes the external walls of the tube in a spiral and wavelike form, where compressed air is simultaneously passing inside the tube the pressure of which does not exceed 0.5 bar, and/or vacuum is applied extremelly. No internal calliper is used.
GR970100396A 1997-10-21 1997-10-21 Spiral tube wavelike internal and external surface and method for its production GR1003001B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR97100396 1997-10-21

Publications (1)

Publication Number Publication Date
GR1003001B true GR1003001B (en) 1998-10-27

Family

ID=10943076

Family Applications (1)

Application Number Title Priority Date Filing Date
GR970100396A GR1003001B (en) 1997-10-21 1997-10-21 Spiral tube wavelike internal and external surface and method for its production

Country Status (1)

Country Link
GR (1) GR1003001B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027864A (en) * 1985-05-21 1991-07-02 Arnco Corporation Tubular apparatus for transmission cable
EP0581064A1 (en) * 1992-07-27 1994-02-02 Drossbach GmbH & Co. KG Cable protecting conduit
EP0732789A1 (en) * 1995-03-14 1996-09-18 CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. Improvements to underground tubular ducts for telecommunications networks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027864A (en) * 1985-05-21 1991-07-02 Arnco Corporation Tubular apparatus for transmission cable
EP0581064A1 (en) * 1992-07-27 1994-02-02 Drossbach GmbH & Co. KG Cable protecting conduit
EP0732789A1 (en) * 1995-03-14 1996-09-18 CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. Improvements to underground tubular ducts for telecommunications networks

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Legal Events

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Effective date: 20110503