[특허]Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products

TETRA LAVAL HOLDINGS & FINANCE S.A.

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특허 상세정보

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Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01D-005/34 G01N-021/89 G01B-011/02 G01B-011/04 B29C-065/50 B29C-065/78 B29C-065/00 B29C-065/48 B65B-009/20 B65B-041/18 B29C-053/48 B29K-023/00 B29K-305/02 B29L-009/00
출원번호	US-0125149 (2009-11-17)
등록번호	US-9170131 (2015-10-27)
우선권정보	EP-08169383 (2008-11-18)
국제출원번호	PCT/EP2009/065341 (2009-11-17)
§371/§102 date	20110420 (20110420)
국제공개번호	WO2010/057896 (2010-05-27)
발명자 / 주소	Dorati, Alberto Ansaloni, Roberto Gramazio, Roberto
출원인 / 주소	TETRA LAVAL HOLDINGS & FINANCE S.A.
대리인 / 주소	Buchanan Ingersoll & Rooney PC
인용정보	피인용 횟수 : 0 인용 특허 : 9

초록
▼

An apparatus for detecting the position of application of a sealing strip of heat-seal plastic material onto a multilayer web of packaging material for food products advanced along a predetermined path and including at least one base layer for stiffness and strength and one or more heat-seal plastic layers; the sealing strip has a first longitudinal portion, applied onto a longitudinal edge of the web, and a second longitudinal portion projecting laterally from the longitudinal edge. The apparatus comprises a light source for irradiating a transversal portion of the web during movement thereof along its path, and a sensor detecting a quantity related to different behavior of the materials forming the web and the sealing strip to light exposure and generating an output signal related to the width of the second portion of the sealing strip in a direction orthogonal to the web travelling direction and parallel to said web.

대표
청구항
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1. An apparatus for detecting a position of application of a sealing strip of heat-seal plastic material onto a multilayer web of packaging material for food products advanced along a predetermined path in a travelling direction and including at least one base layer for stiffness and strength and one or more heat-seal plastic layers, said sealing strip having a first longitudinal portion, applied onto a longitudinal edge of said web, and a second longitudinal portion projecting laterally from said longitudinal edge, said apparatus comprising: a light source configured for irradiating a transversal portion of said web during movement of the web along said path; anda sensor in use detecting a quantity related to different behavior of materials forming the web and the sealing strip to light exposure and generating an output signal related to a width of said second longitudinal portion of said sealing strip in a direction orthogonal to the travelling direction of the web and parallel to said web. 2. An apparatus as claimed in claim 1, wherein said light source and said sensor are arranged at opposite sides of said web and wherein the quantity detected by the sensor is an intensity of direct light passing through different materials of the sealing strip and the web. 3. An apparatus as claimed in claim 1, further comprising an electronic processing unit that includes a part receiving said output signal from said sensor and generating an alarm signal when a detected width of the second portion of the sealing strip is out of a predetermined range of acceptable values, and/or a control signal for controlling a position of feeding means of said sealing strip with respect to said web. 4. An apparatus as claimed in claim 1, wherein said light source and said sensor are arranged at a common side of said web, and wherein the quantity detected by said sensor is an intensity of light reflected by irradiated materials. 5. An apparatus as claimed in claim 2, wherein detected values of the intensity of the light corresponding to the second longitudinal portion of the sealing strip are different from detected values corresponding to both sides of said second longitudinal portion. 6. An apparatus as claimed in claim 3, wherein said part of the electronic processing unit generates a stop signal when the detected width of the longitudinal portion of the sealing strip is out of said range for a time period greater than a threshold time interval. 7. An apparatus as claimed in claim 4, further comprising a reflecting surface arranged at a side of said web opposite to said sensor and said light source, the reflecting surface having a first portion, covered by the web and the sealing strip with respect to the light source, and a second portion laterally protruding from the second longitudinal portion of said sealing strip and facing said light source. 8. An apparatus as claimed in claim 7, wherein said second portion of said sealing strip is spaced from said first portion of said reflecting surface. 9. A packaging machine for producing sealed packages of food product from a web of packaging material, comprising an applying apparatus for applying said sealing strip to said web and a detecting apparatus as claimed in claim 1. 10. A packaging machine as claimed in claim 9, wherein said applying apparatus comprises a sealing device for sealing said sealing strip to said longitudinal edge of said web, feeding means for feeding said sealing strip to said applying apparatus, support means bearing said feeding means in an adjustable position along an adjusting direction orthogonal to the travelling direction of the web, actuator means which can be selectively activated for displacing the feeding means in a desired position with respect to said web along the adjusting direction, and control means receiving said output signal from said sensor and generating a control signal for controlling a position of said feeding means with respect to said web. 11. A method for detecting a position of application of a sealing strip of heat-seal plastic material onto a multilayer web of packaging material for food products advanced along a predetermined path in a travelling direction and including at least one base layer for stiffness and strength and one or more heat-seal plastic layers, said sealing strip having a first longitudinal portion, applied onto a longitudinal edge of said web, and a second longitudinal portion projecting laterally from said longitudinal edge, said method comprising: generating a light beam on a transversal portion of said web during movement of the web along said path;detecting a quantity related to different behavior of materials forming the web and the sealing strip to light exposure; andgenerating an output signal related to a width of said second portion of said sealing strip in a transversal direction orthogonal to the travelling direction of the web and parallel to said web. 12. A method as claimed in claim 11, wherein said light beam is generated from one side of said web, and the detected quantity is an intensity of direct light passing through different materials of the sealing strip and the web and received by a sensor at the opposite side of said web. 13. A method as claimed in claim 11, wherein said generating of the light beam comprises generating the light beam from one side of said web, and the detecting of the quantity comprises detecting an intensity of light reflected by irradiated materials. 14. A method as claimed in claim 11, further comprising generating, on the basis of said output signal: an alarm signal, when a detected width of the second portion of the sealing strip is out of a determined range of acceptable values; and/ora control signal for controlling a position of said sealing strip with respect to said web along said transversal direction. 15. A method as claimed in claim 13, wherein said light beam is directed on said web, said sealing strip and a reflecting surface having a first portion, covered by the web and the sealing strip, and a second portion laterally protruding from the second portion of said sealing strip. 16. A method as claimed in claim 14, further comprising generating a stop signal when the detected width of the longitudinal portion of the sealing strip is out of said range for a time period greater than a threshold time interval.

이 특허에 인용된 특허 (9)

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Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products

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Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products

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