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1. 发明专利

JPH09240607A HEAT-SEALED WRAP LAMINATED ARTICLE 失效
公开(公告)号：JPH09240607A
公开(公告)日：1997-09-16
申请号：JP21880596
申请日：1996-08-20
申请人： TETRA PAK AB
发明人： RENATO SETORERI , HANSU SERUBERUGU , GIYUIRA BARA
IPC分类号： B32B43/00 , B29C65/00 , B29C65/02 , B29C65/04 , B29C65/20 , B29C65/36 , B29L9/00 , B29L22/00 , B29L31/26 , B65B9/10 , B65B51/00 , B65B51/10 , B65B51/22 , B65B51/30
摘要： PROBLEM TO BE SOLVED: To join together wrapping materials fluid-tightly, by superimposing the wrapping materials, each comprising a thermoplastic material layer, conductive material layer, and fiber material support layer bonded together, by heating and melting the thermoplastic material layers by the application of a high-frequency current to the conductive material layers from a seal jaw, and by partially pressing seal zones with a projection sticking out from the pressed face of the seal jaw, thereby causing the melted material to flow. SOLUTION: While a high-frequency current is applied to a conductive projection sticking out from the surface of a seal jaw 5, this projection is pressed to an area where laminated wrapping materials 10 and 11, each comprising a thermoplastic material layer 3, a conductive material layer 4, and a fiber material support layer 1, are superimposed one on top of the other, thereby heating and melting the thermoplastic material layers 3 via the conductive material layers 4. Further, because the middle areas of the seal zones 13 and 14 are partially pressed with the projection, the melted thermoplastic resin material layers 3 flow to sweep away foreign matters, for example minute dust, from the surfaces of the conductive material layers 4, eliminating the foreign matters mixedly existing between the conductive materials 4 and improving their contact, and the hermetic joining of the wrapping material layers 10 and 11 is, thus, made easy and sufficient.

2. 发明专利

JPH07164523A DEVICE FOR HEAT-SEALING PACKAGING LAMINATE 失效
公开(公告)号：JPH07164523A
公开(公告)日：1995-06-27
申请号：JP17434894
申请日：1994-07-26
申请人： TETRA PAK AB
发明人： RENATO SETORERI , HANSU SERUBERUGU , GIYUIRA BARA
IPC分类号： B32B43/00 , B29C65/00 , B29C65/02 , B29C65/04 , B29C65/20 , B29C65/36 , B29L9/00 , B29L22/00 , B29L31/26 , B65B9/10 , B65B51/00 , B65B51/10 , B65B51/22 , B65B51/30
摘要： PURPOSE: To enable the optimum sealing even if a packaging laminated product is covered with impurities like the residue of packaged content by providing a ridge for extruding a thermoplastic material layer melted within a sealing zone by high frequency heating to the sealing zone to deposit the same thereon to the acting surface of a sealing jaw. CONSTITUTION: Two packaging laminated materials 10, 11 are bonded before sealing so that the outside thermoplastic layers 3 of them are opposed to each other. A main body 6 having a groove permitting the insertion of a rod 7 comprising a conductive material provided to one side surface thereof is provided and the packaging laminated materials 10, 11 are together pressed by a sealing jaw 5 provided with the ridge 9 projected from the acting surface 8 of the rod 7 and the opposed jaw 12 positioned to the jaw 5 on the opposite side of the materials 10, 11 and, at the same time, the rod 7 of the sealing jaw 5 is connected to a high frequency power supply to melt a thermoplastic layer 3 to allow the same to flow in sealing zones 13, 14. Subsequently, an expanded part 15 is formed to this pressure zone 13 to mix two mutually sealed layers 10, 11 to form a sufficiently strong seal.

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