Improved yarn paper pipe

Improved yarn paper pipe

  • CN 2,444,920 Y
  • Filed: 08/08/2000
  • Issued: 08/29/2001
  • Est. Priority Date: 08/08/2000
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of yarn paper tube of improvement comprises a paper tube, it is characterized in that:

  • be provided with arc chord angle in the paper tube both end sides, and at the inner cutting formation of side breach, at the other flanging that forms of this breach, this flanging leans on toward paper tube internal diameter folding again, the end folding of flanging is against the convolution interlayer, and is fixed.

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