[특허]Induction sealing device and method for manufacturing an induction sealing device

TETRA LAVAL HOLDINGS & FINANCE S.A.

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특허 상세정보

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Induction sealing device and method for manufacturing an induction sealing device

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-065/00 B29C-065/36 B65B-051/22 B29C-065/32 B29C-065/74
출원번호	US-0783991 (2014-03-28)
등록번호	US-10160162 (2018-12-25)
우선권정보	SE-1350448 (2013-04-10)
국제출원번호	PCT/EP2014/056329 (2014-03-28)
국제공개번호	WO2014/166765 (2014-10-16)
발명자 / 주소	Bierlein, Par Israelsson, Karl Sandberg, Daniel De Salvo, Vincenzo Alexandersson, Martin Johansson, Karl-Axel
출원인 / 주소	TETRA LAVAL HOLDINGS & FINANCE S.A.
대리인 / 주소	Knobbe, Martens, Olson & Bear, LLP
인용정보	피인용 횟수 : 0 인용 특허 : 4

초록
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The present invention relates to an induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products. The present invention also relates to a method of manufacturing such an induction sealing device. The device comprises at least one inductor coil provided with at least one elongated sealing surface for cooperation with the packaging material during sealing. The sealing surface comprises a protruding ridge extending along a longitudinal extension of the sealing surface for cooperation with the packaging...

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1. An induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products, comprising: at least one inductor coil provided with at least one elongated sealing surface configured to contact the packaging material during sealing, said elongated sealing surface comprising a protruding ridge extending along a longitudinal extension of the elongated sealing surface configured to contact the packaging material and increase a sealing pressure on the packaging material during sealing, wherein a profile of said elongated sealing surface in a plane directed orthogonal to the longitudinal extension comprises: a first segment abutting a first elongated side surface and a second segment abutting a second elongated side surface;a third segment positioned at a level different from the first and second segments and forming a top surface of the protruding ridge;a fourth segment connecting the first segment to the third segment, said fourth segment comprising a first curved portion connecting to the first segment, the first curved portion connected to a first straight portion, the first straight portion connected to a second curved portion, the second curved portion connected to the third segment, wherein a first ratio between a radius of the first curved portion and a radius of the second curved portion is between 1.0 and 2.0; anda fifth segment connecting the third segment to the second segment, said fifth segment comprising a third curved portion connecting to the third segment, the third curved portion connected to a second straight portion, the second straight portion connected to a fourth curved portion, the fourth curved portion connected to the second segment, wherein a second ratio between a radius of the fourth curved portion and a radius of the third curved portion is between 1.0 and 2.0;wherein the at least one inductor coil is covered with a coating, the coating configured to prevent corrosion and wear of the at least one inductor coil. 2. The induction sealing device according to claim 1, wherein the first, second, and third segments are rectilinear and form plane sealing surface areas configured to contact the packaging material during sealing. 3. The induction sealing device according to claim 1, wherein the first straight portion of the fourth segment connects tangentially to the first and second curved portions and the second straight portion of the fifth segment connects tangentially to the third and fourth curved portions. 4. The induction sealing device according to claim 1, wherein the first and second straight portions are inclined in relation to the first, second, and third segments. 5. The induction sealing device according to claim 1, wherein the first and second curved portions of the fourth segment tangentially connect to the first and third segments, and the third and fourth curved portions of the fifth segment tangentially connect to the third and second segments. 6. The induction sealing device according to claim 1, wherein the first curved portion of the fourth segment connecting to the first segment is concave, the fourth curved portion of the fifth segment connecting to the second segment is concave, and the second and third curved portions of the fourth and fifth segments connecting to the third segment are convex. 7. The induction sealing device according to claim 1, wherein the third segment is curved. 8. The induction sealing device according to claim 1, wherein the first curved portion, first straight portion, and second curved portion, of the fourth segment form an S-shape, and the third curved portion, second straight portion, and fourth curved portion of the fifth segment form a reversed S-shape. 9. The induction sealing device according to claim 1, wherein the first and second straight portions of the fourth and fifth segments are orthogonal to the first and second segments. 10. The induction sealing device according to claim 1, wherein all the surfaces of the at least one inductor coil, or all the surfaces of the at least one inductor coil except for surfaces of power connections, are provided with said coating. 11. The induction sealing device of claim 1, wherein the coating comprises an inner layer consisting of nickel and an outer layer consisting of chromium. 12. The induction sealing device of claim 1, wherein the first ratio of the fourth segment is not equal to the second ratio of the fifth segment. 13. The induction sealing device of claim 1, wherein the fourth segment further comprises a first inclination angle between the first segment and the first straight portion and the fifth segment further comprises a second inclination angle between the second segment and the second straight portion, and wherein the first and second inclination angles are between 100 and 140 degrees. 14. A method of manufacturing an induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products, said induction sealing device comprising at least one inductor coil provided with at least one elongated sealing surface configured to contact the packaging material during sealing, said elongated sealing surface comprising a protruding ridge extending along the longitudinal extension of the elongated sealing surface configured to contact the packaging material and increase a sealing pressure on the packaging material during sealing, wherein the method comprises the step of providing the elongated sealing surface with a profile in a plane directed orthogonal to the longitudinal extension, wherein the profile comprises: a first segment abutting a first elongated side surface and a second segment abutting a second elongated side surface;a third segment positioned at a level different from the first and second segments and forming a top surface of the protruding ridge;a fourth segment connecting the first segment to the third segment, said fourth segment comprising a first curved portion connecting to the first segment, the first curved portion connected to a first straight portion, the first straight portion connected to a second curved portion, the second curved portion connected to the third segment, wherein a first ratio between a radius of the first curved portion and a radius of the second curved portion is between 1.0 and 2.0; anda fifth segment connecting the third segment to the second segment, said fifth segment comprising a third curved portion connecting to the third segment, the third curved portion connected to a second straight portion, the second straight portion connected to a fourth curved portion, the fourth curved portion connected to the second segment, wherein a second ratio between a radius of the fourth curved portion and a radius of the third curved portion is between 1.0 and 2.0;wherein the method further comprises covering the at least one inductor coil with a coating configured to prevent corrosion and wear of the at least one inductor coil. 15. The method of claim 14, wherein the coating comprises an inner layer consisting of nickel and an outer layer consisting of chromium. 16. The method of claim 14, wherein the third segment is curved. 17. The method of claim 14, wherein the first ratio of the fourth segment is not equal to the second ratio of the fifth segment. 18. An induction sealing device for heat sealing packaging material for producing sealed packages of pourable food products, comprising: at least one inductor coil provided with at least one elongated sealing surface configured to contact the packaging material during sealing, said elongated sealing surface comprising a protruding ridge extending along a longitudinal extension of the elongated sealing surface configured to contact the packaging material and increase a sealing pressure on the packaging material during sealing, wherein a profile of said elongated sealing surface in a plane directed orthogonal to the longitudinal extension comprises: a first segment abutting a first elongated side surface and a second segment abutting a second elongated side surface;a third segment positioned at a level different from the first and second segments and forming a top surface of the protruding ridge;a fourth segment connecting the first segment to the third segment, said fourth segment comprising a first curved portion connecting to the first segment, the first curved portion connected to a first straight portion, the first straight portion connected to a second curved portion, the second curved portion connected to the third segment, wherein a first inclination angle between the first segment and the first straight portion is between 100 and 140 degrees; anda fifth segment connecting the third segment to the second segment, said fifth segment comprising a third curved portion connecting to the third segment, the third curved portion connected to a second straight portion, the second straight portion connected to a fourth curved portion, the fourth curved portion connected to the second segment, wherein a second inclination angle between the second segment and the second straight portion is between 100 and 140 degrees;wherein the at least one inductor coil is covered with a coating, the coating configured to prevent corrosion and wear of the at least one inductor coil. 19. The induction sealing device of claim 18, wherein the coating comprises an inner layer consisting of nickel and an outer layer consisting of chromium. 20. The induction sealing device of claim 18, wherein the third segment is curved.

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Induction sealing device and method for manufacturing an induction sealing device

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Induction sealing device and method for manufacturing an induction sealing device

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