发明名称 |
Plastic bag for fine powders |
摘要 |
A method of making and filling a plastic bag includes the steps of providing a bag having a plurality of microperforations; filling the bag with a powdered product; securing the bag; removing at least a portion of entrapped air in the bag through the microperforations; and sealing the microperforations. A product includes a bag configured for being formed from a plastic film into which a plurality of microperforations have been created. The bag contents include less air than that present in the bag when the top and the bottom were secured, at least a portion of the air sealed inside the bag having been expelled through the microperforations. A sealant is used for sealing the microperforations.
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申请公布号 |
US7543708(B2) |
申请公布日期 |
2009.06.09 |
申请号 |
US20040924314 |
申请日期 |
2004.08.23 |
申请人 |
UNITED STATES GYPSUM COMPANY |
发明人 |
DOYLE STANLEY B.;BOGGIA GEORGE W.;IMMORDINO, JR. SALVATORE C. |
分类号 |
B65D81/20;B65B31/00;B65D33/01 |
主分类号 |
B65D81/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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