US 12,466,097 B2
Cutting unit
Ulf Mossberg, Löddeköpinge (SE); and Göran Hermodsson, Staffanstorp (SE)
Assigned to Tetra Laval Holdings & Finance S.A., Pully (CH)
Appl. No. 17/792,106
Filed by Tetra Laval Holdings & Finance S.A., Pully (CH)
PCT Filed Jun. 21, 2021, PCT No. PCT/EP2021/066826
§ 371(c)(1), (2) Date Jul. 11, 2022,
PCT Pub. No. WO2021/259857, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 20182528 (EP), filed on Jun. 26, 2020.
Prior Publication US 2023/0081606 A1, Mar. 16, 2023
Int. Cl. B26D 1/40 (2006.01); B26D 1/00 (2006.01); B26D 7/26 (2006.01); B26D 9/00 (2006.01); B26F 1/20 (2006.01)
CPC B26D 1/405 (2013.01) [B26D 7/2628 (2013.01); B26D 9/00 (2013.01); B26F 1/20 (2013.01); B26D 2001/0053 (2013.01); B26D 2001/006 (2013.01); B26D 2001/0066 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A cutting unit for providing transversal cuts and/or perforations to a string of packaging containers connected by transversal seals, said cutting unit comprising a knife assembly and an anvil assembly rotatable against each other to form a nip for receiving a transversal seal of the string of packaging containers,
wherein the anvil assembly comprises an anvil blade having a first region and a second region such that when the first region is aligned with a knife blade of the knife assembly at the nip a cut is produced, and when the second region is aligned with the knife blade at the nip a perforation is produced;
wherein the anvil blade includes an anvil surface that is a curved surface, and the curved surface interacts with the knife blade;
wherein the second region is provided with a plurality of depressions;
wherein the depth of each depression increases in a circumferential direction away from the first region; and/or
wherein the width of each depression increases in a circumferential direction away from the first region.