| 摘要 |
PROBLEM TO BE SOLVED: To readily and surely open and seal a packing material. SOLUTION: Two packing films 2 are overlapped and the peripheral parts except one side are integrally bonded by heat fusion, etc., to form a rice ball storage chamber 3 partially opening between both the packing films 2. Among the peripheral parts of the packing films 2, parts perpendicularly intersecting the opening part are extended outward and provided with square projecting pieces 4. The projecting pieces 4 of the packing film 2 at the surface side are furnished with two cuts 6 inward and a gripping part 7 is formed between both the cuts 6. An opening and sealing means 5 for opening and sealing a packing material 1 is composed of the gripping part 7 and both the cuts 6. Since an overlapped part formed when the opening part of the packing material 1 is closed does not exist on a route of the opening and closing means 5, excessive resistance will not act on the opening and closing means in opening and sealing, parts of the packing films 2 corresponding to the opening and sealing means 5 are readily torn and a rice ball can be separated and removed from other parts. |
