A patent for the zipper of re-closable packages that includes an impressed pattern which is impinged against by the slider is described. This creates an aesthetically pleasing appearance and sound as the closure is operated. A corresponding tactile sensation is also created. A number of variations a
โฆ LIBER โฆ
4646821 Plate elements and gaskets at plate heat exchangers or plate filters
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 88 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0890-4332
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