VACUUM PACKAGING FILMS PATTERNED WITH PROTRUDING CAVERNOUS STRUCTURES
- 专利权人:
- SUNBEAM PRODUCTS, INC.
- 发明人:
- WU, HONGYU
- 申请号：
- CA20052812814
- 公开号：
- CA2812814(C)
- 申请日:
- 2005.07.21
- 申请国别(地区):
- 加拿大
- 年份:
- 2015
- 代理人:
- 摘要：
The present invention teaches a film having a pattern of protruding structures. When used in the vacuum packaging bag material context, the result is a vacuum packaging bag that a consumer can effectively evacuate and hermetically seal. The protruding structures tend to form channels that enable gas to evacuate from within a vacuum packaging bag. In certain embodiments, the protruding structures are formed only on an inner side of the vacuum packaging film, typically through a hot casting or heat-extrusion process. As a result, far less bag material is required than in the prior art patterned film formed through cold embossing processes. The present invention also contemplates a variety of applications for the films, including preformed bags and bag rolls, as well as a variety of apparatus for manufacturing the films and appliances for utilizing the bags and bag rolls.
- 来源网站：
- 中国工程科技知识中心
