	US 12,240,643 B2
	Induction heat sealing device and a method for transversally seal a tube of packaging material
Per Karlsson, Limhamn (SE); Patrik Palmquist, Lomma (SE); Magnus Lindvall, Lund (SE); Max Melin, Staffanstorp (SE); Håkan Andersson, Åkarp (SE); and Karl Israelsson, Malmö (SE)
Assigned to Tetra Laval Holdings & Finance S.A., Pully (CH)
Filed by Tetra Laval Holdings & Finance S.A., Pully (CH)
Filed on Aug. 2, 2023, as Appl. No. 18/364,361.
Application 18/364,361 is a continuation of application No. 17/310,399, granted, now 12,122,547, previously published as PCT/EP2020/052444, filed on Jan. 31, 2020.
Claims priority of application No. 19155474 (EP), filed on Feb. 5, 2019.
Prior Publication US 2023/0373676 A1, Nov. 23, 2023
Int. Cl. B65B 51/30 (2006.01); B29C 65/00 (2006.01); B65B 9/08 (2012.01); B65B 51/22 (2006.01)

CPC B65B 51/30 (2013.01) [B29C 66/1122 (2013.01); B29C 66/4312 (2013.01); B29C 66/849 (2013.01); B65B 9/08 (2013.01); B65B 51/227 (2013.01)]

8 Claims

1. An induction heat sealing device for providing a transversal sealing of a tube of packaging material, the induction heat sealing device comprising:

a main body comprising a first sealing surface, a second sealing surface, and a recess, the recess configured to receive a knife;

at least one electric conductor arrangement in the main body, the at least one electric conductor arrangement configured to induce eddy currents in the packaging material; and

a counter-pressure arrangement opposite the main body, wherein the counter-pressure arrangement comprises convex-shaped pad surfaces,

wherein the first and second sealing surface are on opposite sides of the recess, wherein the first sealing surface extends from the recess to a first end of the main body, and the second sealing surface extends from the recess to a second end of the main body opposite the first end, wherein the first sealing surface is inclined across the entire first sealing surface and the second sealing surface is inclined across the entire second sealing surface.