发明名称 |
Method and apparatus for pinch perforating multi-ply web material |
摘要 |
<p>A method and apparatus for pinch perforating multi-ply web material (2) to increase the perforation ply bond and/or perforation ply bond retention by pinching the multiple plies of web material together and then perforating the material using an anvil (25) and perforator blade (7) design provided on a perforating apparatus. Specifically, the apparatus comprises a roll mounted contoured perforator blade (7) which cooperates with a beveled anvil (25) to produce perforation ply bonds perpendicular to the length of the multiple plies of web material (2). The desired anvil/perforator blade interface angle between 0 DEG and 20 DEG is provided by beveling the anvil. A 15 DEG beveled anvil is preferred to provide a 5 DEG anvil/perforator blade interface angle. By pinching and bonding the leading edges and other predetermined points of the multi-ply tissue paper together before cutting, the likelihood of ply separation, missing plies and ply mismatch is greatly reduced.</p> |
申请公布号 |
EP0770477(B1) |
申请公布日期 |
2002.09.25 |
申请号 |
EP19960117033 |
申请日期 |
1996.10.23 |
申请人 |
GEORGIA-PACIFIC CORPORATION |
发明人 |
SCHULZ, GALYN;GRACYALNY, DALE T. |
分类号 |
B26D1/00;B26D7/26;B26F1/20;B26F1/38;B31F5/02;(IPC1-7):B31F5/02;A47K10/16 |
主分类号 |
B26D1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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