초록 ▼

A heat-sealing device moves a tube-shaped packaging material through operation of a seal jaw and counter jaw under the liquid surface of liquid food, and heat-seals a seal zone containing a cutting predetermined zone in the tube transverse direction. The tube-shaped packaging material is formed from

A heat-sealing device moves a tube-shaped packaging material through operation of a seal jaw and counter jaw under the liquid surface of liquid food, and heat-seals a seal zone containing a cutting predetermined zone in the tube transverse direction. The tube-shaped packaging material is formed from the packaging material web, and is filled up with liquid food. The operation surface of the seal jaw facing the seal zone has a substantially flat surface. The heat-sealing device has a removal/mixture mechanism on the operation surface of the counter jaw. The removal/mixture mechanism removes seal prevention impurity from this seal zone and/or mixes the impurity with the melting/softening packaging material in this seal zone. Thus, even if the packaging laminated material is covered with an oxide, residual substances, or impurities, the heat-sealing device reduces the bad influence of the seal prevention impurity.

대표청구항 ▼

What is claimed is: 1. A heat-sealing device which transversely seals a tube shaped packaging material filled up with liquid food to form a seal zone of the tube shaped packaging material through softening or melting of plastic material forming a part of the tube shaped packaging material, comprisi

What is claimed is: 1. A heat-sealing device which transversely seals a tube shaped packaging material filled up with liquid food to form a seal zone of the tube shaped packaging material through softening or melting of plastic material forming a part of the tube shaped packaging material, comprising: a seal jaw and a counter jaw positioned in opposition to one another, the seal jaw including means for effecting softening or melting of the plastic material forming a part of the tube shaped packaging material, the seal jaw and the counter jaw both including an operation surface that faces and contacts the seal zone during transverse sealing under a liquid surface of the liquid food, the operation surface of the seal jaw being a flat surface across its entire extent, the seal jaw heating the packaging material to soften or melt the plastic material so that the seal zone is coextensive with the flat operation surface of the seal jaw, the operation surface of the counter jaw being formed with at least two raised ridges or at least two chevron-shaped elements to remove seal prevention impurity including the liquid food which may remain in the seal zone, or to mix the seal prevention impurity with the softened or melted plastic material. 2. The heat-sealing device of claim 1, wherein the operation surface of the counter jaw is formed as a sloped surface. 3. The heat-sealing device of claim 1, wherein the means for effecting softening or melting of the plastic material forming a part of the tube shaped packaging material includes an inductor for high frequency induction heating. 4. The heat-sealing device of claim 1, wherein the means for effecting softening or melting of the plastic material forming a part of the tube shaped packaging material includes a horn for forming the seal zone by ultrasonic heating. 5. The heat-sealing device of claim 1, wherein the means for effecting softening or melting of the plastic material forming a part of the tube shaped packaging material includes a resistance body for forming the seal zone by heating. 6. The heat-sealing device of claim 1, wherein the operation surface of the counter jaw is formed with the at least two raised ridges or the at least two chevron-shaped elements to remove seal prevention impurity including the liquid food which may remain in the seal zone, and to mix the seal prevention impurity with the softened or melted plastic material. 7. A heat-sealing device which transversely heat-seals a tube shaped packaging material, formed from a packaging material web and filled up with liquid food, in a seal zone of the tube shaped packaging material that contains a cutting predetermined zone through softening or melting of plastic material forming the packaging material, the heat-sealing device comprising: a seal jaw and a counter jaw; the seal jaw and the counter jaw both including an operation surface that faces and contacts the seal zone during transverse sealing under a liquid surface of the liquid food, the operation surface of the seal jaw being a flat surface across its entire extent, the seal jaw heating the packaging material to soften or melt the plastic material so that the seal zone is coextensive with the flat operation surface of the seal jaw, the operation surface of the counter jaw including removal/mixture means for removing from the seal zone seal prevention impurity including the liquid food which may remain in the seal zone, or mixing the seal prevention impurity with the plastic material that has softened or melted, the removal/mixture means comprising at least two raised ridges or at least two chevron-shaped elements on the operation surface of the counter jaw. 8. The heat-sealing device of claim 7, wherein the removal/mixture means is a sloped surface forming the operation surface of the counter jaw. 9. The heat-sealing device of claim 7, including an inductor for high frequency induction heating that is arranged at the seal jaw, and the packaging material comprises a metal thin layer and a thermoplastic material innermost layer. 10. The heat-sealing device of claim 7, including a horn for forming the seal zone by ultrasonic heating that is arranged at the seal jaw, and the packaging material includes at least a thermoplastic material innermost layer. 11. The heat-sealing device of claim 7, including a resistance body for forming the seal zone by heating that is arranged at the seal jaw, and the packaging material includes at least a thermoplastic material innermost layer. 12. The heat-sealing device of claim 7, wherein the removal/mixture means removes from the seal zone seal prevention impurity including the liquid food which may remain in the seal zone and mixes the seal prevention impurity with the plastic material that has softened or melted. 13. A filling machine for forming an advancing packaging material web into a tube shaped packaging material, filling up liquid food in the tube shaped packaging material, and transversely heat-sealing the tube shaped packaging material in a seal zone of the packaging material containing a cutting predetermined zone through softening or melting of plastic material forming the packaging material, comprising: a heat-sealing device for forming the seal zone, the heat sealing device comprising a seal jaw and a counter jaw that both include an operation surface facing and contacting the seal zone during transverse sealing under the liquid surface of the liquid food, the operation surface of the seal jaw being a flat surface across its entire extent, the seal jaw heating the packaging material to soften or melt the plastic material so that the seal zone is coextensive with the flat operation surface of the seal jaw, the operation surface of the counter jaw including removal/mixture means on the operation surface of the counter jaw for removing from the seal zone seal prevention impurity which may remain in the seal zone, or mixing the seal prevention impurity including the liquid food with the plastic material that has softened or melted, the removal/mixture means comprising at least two raised ridges or at least two chevron-shaped elements on the operation surface of the counter jaw. 14. The filling machine of claim 13, wherein the removal/mixture means is a sloped surface forming the operation surface of the counter jaw. 15. The filling machine of claim 13, including an inductor for high frequency induction heating that is arranged at the seal jaw, and the packaging material comprises a metal thin layer and a thermoplastic material innermost layer. 16. The filling machine of claim 13, wherein a horn for forming the seal zone by ultrasonic heating that is arranged at the seal jaw, and the packaging material includes at least a thermoplastic material innermost layer. 17. The filling machine of claim 13, including a resistance body for forming the seal zone by heating that is arranged at the seal jaw, and the packaging material includes at least a thermoplastic material innermost layer. 18. The filling machine of claim 13, wherein the removal/mixture means on the operation surface of the counter jaw removes from the seal zone seal prevention impurity which may remain in the seal zone, and mixes the seal prevention impurity including the liquid food with the plastic material that has softened or melted.