JPS6237719Y2 - - Google Patents

Info

Publication number

JPS6237719Y2

JPS6237719Y2 JP12245183U JP12245183U JPS6237719Y2 JP S6237719 Y2 JPS6237719 Y2 JP S6237719Y2 JP 12245183 U JP12245183 U JP 12245183U JP 12245183 U JP12245183 U JP 12245183U JP S6237719 Y2 JPS6237719 Y2 JP S6237719Y2

Authority

JP

Japan

Prior art keywords

pipe

core material

welded

diameter

connecting portion

Prior art date

1983-08-05

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

Links

• Espacenet
• Global Dossier
• Discuss

• 239000011162 core material Substances 0.000 claims description 24
• 229920003002 synthetic resin Polymers 0.000 claims description 8
• 239000000057 synthetic resin Substances 0.000 claims description 8
• 238000003466 welding Methods 0.000 description 3
• 230000037431 insertion Effects 0.000 description 2
• 238000003780 insertion Methods 0.000 description 2
• 230000001020 rhythmical effect Effects 0.000 description 2
• 238000010438 heat treatment Methods 0.000 description 1
• 230000002093 peripheral effect Effects 0.000 description 1
• 238000003825 pressing Methods 0.000 description 1
• 238000000926 separation method Methods 0.000 description 1
• 239000007787 solid Substances 0.000 description 1