Paper Converting Machine Company

Peter A Heath

James E Hertel

Gary E Johnson

Grantland A Craig

John H Wunderlich

Thomas D Huempfner

Wayne W Luebke

A stack of interfolded sheets is formed from a plurality of groups of interfolded sheets. Adjacent groups are secured or bonded together so that the bottom sheet of each group pulls the top sheet of the next group. In one embodiment of the invention, the strength of the bond is such that when the bottom sheet of a group is withdrawn through an opening in a package for the stack, the bond releases the top sheet of the next group after the top sheet is partially withdrawn through the opening. In another embodiment of the invention, the strength of the bond is such that the top sheet remains secured to the bottom sheet and is completely withdrawn through the opening. The sheets can be secured by an adhesive bond or by a non-adhesive bond.

Stack formed from connected groups of interfolded sheets

A stack of folded sheets includes right and left W folded sheets and right and left Z folded sheets which are arranged and interfolded so that the stack is balanced and has uniform bulk across its width. Withdrawal of the top sheet of the stack lifts the next sheet into position for withdrawal. The W and Z folded sheets advantageously have a maximum width of 120 mm, an overlap of about 40 mm, and a sheet width of up to 340 mm. Narrower stacks of W and Z folded sheets have folded widths of 100 mm or 75 mm and sheet widths of 292 mm or 215 mm.

Stack comprising W-Z folded sheets

Growing community of inventors

Plymouth, United Kingdom

Peter A Heath