| 摘要 |
The present invention relates to a packaging bag (1), in particular of paper, plastic or a composite of these materials, having a closable top (2) and a sound source (10) producing a single or a sequence of tones, sounds and/or noises when the top is opened. To provide a packaging bag with a reliably functioning sound source which is activated when the packaging bag is opened, the top is closable using a closure means (12a, 12b). ® KIPO & WIPO 2007
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