US 12,122,547 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)
Appl. No. 17/310,399
Filed by Tetra Laval Holdings & Finance S.A., Pully (CH)
PCT Filed Jan. 31, 2020, PCT No. PCT/EP2020/052444
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2020/161018, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 19155474 (EP), filed on Feb. 5, 2019.
Prior Publication US 2022/0127031 A1, Apr. 28, 2022
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)] 18 Claims
OG exemplary drawing
 
1. An induction heat sealing device for providing a transversal sealing of a tube of packaging material, said induction heat sealing device comprising:
a main body comprising a first and a second sealing surface arranged to face the packaging material during a sealing state,
a recess provided in the main body for receiving a knife during a cutting state, wherein the first and second sealing surface are placed on opposite sides of the recess,
an electric conductor arrangement, provided in the main body, the electric conductor arrangement configured to induce eddy currents in the packaging material during the sealing state, and
a magnetic flux concentrator arrangement positioned around and holding the electric conductor arrangement,
wherein the first and second sealing surface are inclined and provided with a first and a second top section, respectively, such that particles in a product held inside the tube are pushed away from a sealing band of the tube as the first and second top section are pressed towards the sealing band.