US 11,697,219 B2
Method of perforating a nonlinear line of weakness
Kathryn Christian Kien, Cincinnati, OH (US); Deborah Sue Slovut, Madeira, OH (US); and Jeffrey Moss Vaughn, Colerain Township, OH (US)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Jan. 21, 2022, as Appl. No. 17/580,686.
Application 17/580,686 is a continuation of application No. 14/301,384, filed on Jun. 11, 2014, granted, now 11,254,024.
Claims priority of provisional application 61/834,114, filed on Jun. 12, 2013.
Prior Publication US 2022/0332006 A1, Oct. 20, 2022
Int. Cl. B26F 1/20 (2006.01); B26D 3/08 (2006.01); B26D 7/20 (2006.01); B26D 3/10 (2006.01); B26D 1/38 (2006.01); B26F 1/14 (2006.01); B26D 7/26 (2006.01); B26D 1/00 (2006.01); B26D 5/00 (2006.01)
CPC B26F 1/20 (2013.01) [B26D 1/385 (2013.01); B26D 3/085 (2013.01); B26D 3/10 (2013.01); B26D 7/204 (2013.01); B26F 1/14 (2013.01); B26D 5/00 (2013.01); B26D 7/2614 (2013.01); B26D 2001/002 (2013.01); B26D 2001/006 (2013.01); B26D 2007/2692 (2013.01); Y10T 83/0481 (2015.04)] 23 Claims
OG exemplary drawing
 
1. A method for perforating a web, the method comprising:
rotating a cylinder comprising a longitudinal cylinder axis and at least one shaped blade;
operatively engaging a moveable support with the cylinder;
positioning a blade on the support so as to cooperate in contacting relationship with the shaped blade, wherein the shaped blade and the blade disposed on the support each comprise a plurality of teeth, and wherein adjacent teeth are separated by a recessed portion, wherein at least one of the plurality of teeth on at least one of the shaped blade and the blade disposed on the support has a tooth length, and wherein at least one of the plurality of teeth on the at least one of the shaped blade and the blade disposed on the support has a recessed portion length, and wherein each tooth length and each recessed portion length of the at least one of the plurality of teeth on at least one of the shaped blade and the blade disposed on the support are non-uniform;
feeding a web between the cylinder and the support; and
perforating the web as the blade disposed on the support cooperates in contacting relationship with the shaped blade disposed on the rotating cylinder, wherein the web comprises perforated portions and non-perforated portions, and wherein the perforated portions and the non-perforated portions are uniform.