B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 37/04 (2006.01) B26D 1/00 (2006.01) B26D 7/26 (2006.01) B26F 1/20 (2006.01) B26F 1/38 (2006.01) B31F 5/02 (2006.01)
Patent
CA 2188091
A method and apparatus for pinch perforating multi-ply web material 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 and perforator blade design provided on a perforating apparatus. Specifically, the apparatus comprises a roll mounted contoured perforator blade which cooperates with a beveled anvil to produce perforation ply bonds perpendicular to the length of the multiple plies of web material. The desired anvil/perforator blade interface angle between 0° and 20° is provided by beveling the anvil. A 15° beveled anvil is preferred to provide a 5° 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 plymismatch is greatly reduced.
Gracyalny Dale T.
Schulz Galyn
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Georgia-Pacific Consumer Products Lp
LandOfFree
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