BE419542A - - Google Patents

Info

Publication number

BE419542A

BE419542A BE419542DA BE419542A BE 419542 A BE419542 A BE 419542A BE 419542D A BE419542D A BE 419542DA BE 419542 A BE419542 A BE 419542A

Authority

BE

Belgium

Prior art keywords

spiral winding

tubular casing

section

powder

outer tubular

Prior art date

Links

• Espacenet
• Global Dossier
• Discuss

• 238000004804 winding Methods 0.000 claims description 23
• 239000000843 powder Substances 0.000 claims description 16
• 230000006835 compression Effects 0.000 claims description 10
• 238000007906 compression Methods 0.000 claims description 10
• 238000000034 method Methods 0.000 claims description 9
• 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
• 239000011707 mineral Substances 0.000 claims description 7
• 238000004519 manufacturing process Methods 0.000 description 6
• 238000010438 heat treatment Methods 0.000 description 5
• 239000011810 insulating material Substances 0.000 description 5
• 238000005485 electric heating Methods 0.000 description 3
• 238000009826 distribution Methods 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 238000005096 rolling process Methods 0.000 description 1
• 125000006850 spacer group Chemical group 0.000 description 1