发明名称 |
Method and apparatus for metered pre-stretch film delivery |
摘要 |
<p>The present invention provides a method and apparatus for dispensing a predetermined substantially constant length of pre-stretched packaging material based upon load girth. Based upon the girth of the load to be wrapped, an amount of pre-stretched packaging material to be dispensed for each revolution of relative rotation between a packaging material dispenser and the load is determined. A rotational drive system used to provide the relative rotation is linked to a pre-stretch assembly portion of the packaging material dispenser. The linkage may be mechanical or electrical.; The linkage controls a ratio of the rotational speed to the pre-stretch assembly dispensing speed, such that the predetermined substantially constant length of pre-stretched packaging material is dispensed for each revolution of the packaging material dispenser relative to the load regardless of the speed of the rotational drive. In the case of a mechanical linkage, the linkage also connects the rotational drive to the pre-stretch assembly portion such that the rotational drive also drives the pre-stretch assembly portion. Good wrapping performance in terms of load containment (wrap force) and optimum packaging material use is obtained by dispensing a length of pre-stretched packaging material that is between approximately 90% and approximately 120% of load girth.</p> |
申请公布号 |
EP2607245(A2) |
申请公布日期 |
2013.06.26 |
申请号 |
EP20120199129 |
申请日期 |
2007.02.23 |
申请人 |
LANTECH.COM, LLC |
发明人 |
LANCASTER, PATRICK R. III;ELDRIDGE, DAVID E.;HALL, WILLIE MARTIN;JOHNSON, RICHARD L.;MARTIN, CURTIS W.;MOORE, PHILLIP R.;NORRIS, JOSEPH DONALD |
分类号 |
B65B11/02;B65B11/00 |
主分类号 |
B65B11/02 |
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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