| 摘要 |
This invention relates to a clamping mechanism which is effective to produce a high compressive force on the gathered open end of a thermoplastic bag containing an appropriate product, such as food items for freezing, characterized by the fact that a high compressive force is supplied to at least two spaced portions of the gathered bag end material to effect the sealing of the bag material through cold flow of the material and without the application of any external heat. |
