AU7943675A - A process and device forthe manufacture of double-walled plastics pipes with their external wall provided with annular or helical grooves - Google Patents

A process and device forthe manufacture of double-walled plastics pipes with their external wall provided with annular or helical grooves

Info

Publication number
AU7943675A
AU7943675A AU79436/75A AU7943675A AU7943675A AU 7943675 A AU7943675 A AU 7943675A AU 79436/75 A AU79436/75 A AU 79436/75A AU 7943675 A AU7943675 A AU 7943675A AU 7943675 A AU7943675 A AU 7943675A
Authority
AU
Australia
Prior art keywords
annular
double
external wall
wall provided
helical grooves
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
AU79436/75A
Other versions
AU487687B2 (en
Inventor
Hegler And Ralph Peter Hegler Wilhelm
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE2413879A external-priority patent/DE2413879C3/en
Priority claimed from DE2413878A external-priority patent/DE2413878C3/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of AU487687B2 publication Critical patent/AU487687B2/en
Publication of AU7943675A publication Critical patent/AU7943675A/en
Expired legal-status Critical Current

Links

AU79436/75A 1974-03-22 1975-03-24 A process and device forthe manufacture of double-walled plastics pipes with their external wall provided with annular or helical grooves Expired AU487687B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEDE824138 1974-03-22
DE2413879A DE2413879C3 (en) 1974-03-22 1974-03-22 Device for the production of a double-walled plastic pipe from a corrugated outer pipe and a smooth inner pipe
DE2413878A DE2413878C3 (en) 1974-03-22 1974-03-22 Process for producing a double-walled plastic pipe with a corrugated outer wall and a smooth inner wall and a device for carrying out this process

Publications (2)

Publication Number Publication Date
AU487687B2 AU487687B2 (en) 1976-09-30
AU7943675A true AU7943675A (en) 1976-09-30

Family

ID=

Also Published As

Publication number Publication date
PL100947B1 (en) 1978-11-30
FI60990C (en) 1982-05-10
EG11746A (en) 1978-12-31
IT1034462B (en) 1979-09-10
BR7501741A (en) 1975-12-23
IL46892A (en) 1978-07-31
FI750830A (en) 1975-09-23
AR207352A1 (en) 1976-09-30
IL46892A0 (en) 1975-05-22
YU67975A (en) 1982-02-28
BG27885A3 (en) 1980-01-15
FI60990B (en) 1982-01-29

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