US 11,806,889 B2
Perforating apparatus and method for manufacturing a shaped line of weakness
Katie Kristine Glass, Maineville, OH (US); Zachary Aaron Freije, Ashville, NC (US); Matthew Travis Brightman, Newport, KY (US); and Nicholas Raymond Tenhundfeld, Hyde Park, OH (US)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Sep. 7, 2018, as Appl. No. 16/124,587.
Claims priority of provisional application 62/556,628, filed on Sep. 11, 2017.
Prior Publication US 2019/0077038 A1, Mar. 14, 2019
Int. Cl. B26F 1/10 (2006.01); B26D 1/62 (2006.01); B26D 1/38 (2006.01); B26D 7/18 (2006.01)
CPC B26F 1/10 (2013.01) [B26D 1/385 (2013.01); B26D 1/626 (2013.01); B26D 7/1854 (2013.01); B26D 7/1863 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A perforating apparatus, the apparatus comprising:
a cylinder comprising a longitudinal cylinder axis and an outer circumferential surface, wherein the outer circumferential surface defines a plurality of recessed portions, and wherein the cylinder rotates about the longitudinal cylinder axis;
a plurality of anvil blocks removably connected with the plurality of recessed portions, wherein each of the plurality of anvil blocks comprise an anvil block surface disposed at a first elevation beyond the outer circumferential surface of the cylinder and wherein each of the plurality of anvil blocks comprise an anvil bead, the anvil bead disposed on the anvil block surface and disposed at a second elevation beyond the outer circumferential surface of the cylinder such that the anvil bead comprises a distinct profile from the anvil block on which the anvil bead is disposed, wherein the anvil bead is shaped, wherein a portion of anvil blocks of the plurality of anvil blocks extend linearly along a length of the cylinder, the portion of anvil blocks abutting one another and being offset from one another along the longitudinal cylinder axis, wherein the anvil beads disposed on the portion of anvil blocks form a continuous non-linear shape along the cylinder, wherein at least a portion of side edges of the anvil blocks are radially positioned about the outer circumferential surface of the cylinder and a cavity is formed between adjacent side edges of the anvil blocks, and wherein each of the plurality of anvil block extend radially away from the outer circumferential surface of the cylinder;
a blade positioned adjacent the plurality of anvil blocks so as to cooperate in contacting relationship with the plurality of anvil beads, wherein the blade comprises a plurality of teeth, and wherein the blade is at a blade angle with respect to a traversing web;
wherein the cavity is capable of carrying debris past the blade; and
wherein the traversing web is perforated as the web passes between the anvil bead and the blade forming a shaped line of weakness.