US 12,258,168 B2
Inductor for transversal sealing, a packaging machine comprising the inductor for transversal sealing and a method thereof
Karl Israelsson, Malmö (SE); and Per Karlsson, Limhamn (SE)
Assigned to TETRA LAVAL HOLDINGS & FINANCE S.A., Pully (CH)
Appl. No. 18/000,528
Filed by TETRA LAVAL HOLDINGS & FINANCE S.A., Pully (CH)
PCT Filed Jun. 16, 2021, PCT No. PCT/EP2021/066262
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2022/008187, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 20184651 (EP), filed on Jul. 8, 2020.
Prior Publication US 2023/0227194 A1, Jul. 20, 2023
Int. Cl. B65B 51/22 (2006.01); B29C 65/00 (2006.01); B65B 9/12 (2006.01); B65B 9/20 (2012.01); B65B 51/30 (2006.01); B65B 61/06 (2006.01)
CPC B65B 51/30 (2013.01) [B29C 66/8491 (2013.01); B65B 9/12 (2013.01); B65B 9/2049 (2013.01); B65B 51/227 (2013.01); B65B 61/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An inductor for transversal sealing of a tube of packaging material filled with food product, said inductor 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 on opposite sides of the recess, and
an electric conductor arrangement, provided in the main body, for inducing eddy currents in the packaging material during the sealing state,
each of the first and second sealing surfaces comprising a top section, an inner sealing section between the recess and the top section, and an outer sealing section between the top section and an outer edge of the inductor, and wherein the inner sealing section is continuously inclined with non-zero degrees inclination from the top section to the recess, and the outer sealing section is continuously inclined with non-zero degrees inclination from the top section to the outer edge, so that product in the food product held inside the tube is pushed away from a sealing band of the tube as the first and second sealing surfaces are pressed towards the sealing band.