Method and apparatus for pinch perforating multiply web material

A method of pinching and perforating multiple paper plies comprising the steps of:

• feeding said multiple paper plies between a perforator blade and an anvil;
• said perforator blade including a plurality of teeth, each tooth including a contoured leading face and a trailing cutting edge;
• pinching a leading edge of said multiple paper plies between said contoured leading face of said perforator blade and said anvil to bond said multiple paper plies to one another;
• and
• perforating said multiple paper plies by said trailing cutting edge in a region adjacent the bond between the multiple paper plies to provide a plurality of cuts in a direction substantially perpendicular to the length of said multiple paper plies and create a series of individual paper sheets connected at said plurality of cuts,
• wherein a perforation ply bond between the multiple paper plies is created at the leading edge of each said individual sheet.

A device for forming a plurality of multi-ply interconnected sheets comprising:

• a feeding means for feeding a multi-ply web of indeterminate length;
• and
• a perforator blade including a plurality of teeth, each tooth including a contoured leading face constituting
• a pinching means for periodically pinching a predetermined portion of the multi-ply web to bond said portions together;
• and a trailing cutting edge constituting
• a perforating means for periodically perforating the multi-ply web in a region adjacent said bond and said predetermined portion of the multi-ply web.