| 摘要 |
PROBLEM TO BE SOLVED: To provide a tamper-proof bag body which is easily opened by a proper purchaser and apparently judged to be opened when the bag is opened dishonestly. SOLUTION: This tamper-proof bag body is a thermoplastic film bag body with an opening part, and the opening part is provided with a pair of male-female freely openable fastener on the inside face of the film. The film of the opening part is spot welded at the lower part of the fastener at such intervals that a stored item stored in the bag body is not taken out. It is desirable that the spot welding is so welded that it does not break the plastic film in breaking the welding. The welding can be formed zigzag in the width direction of the bag body. COPYRIGHT: (C)2006,JPO&NCIPI
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