发明名称 |
WEB LATERAL POSITION CONTROL |
摘要 |
A method and apparatus for controlling the lateral position of a moving web of material having a central longitudinally extending web axis extending generally parallel to the direction of movement of the web so as to maintain the central longitudinally extending axis of the web at a substantial constant lateral position relative a fixed longitudinally extending axis associated with a fixed web alignment station based upon the detected longitudinal distance between certain portions of a series of longitudinally spaced apart, substantially identical, generally transversely extending indicia in a longitudinally extending indicia path parallel to the central longitudinal axis of the web. |
申请公布号 |
CA1302544(C) |
申请公布日期 |
1992.06.02 |
申请号 |
CA19870545641 |
申请日期 |
1987.08.28 |
申请人 |
DITTO, JAMES W. |
发明人 |
DITTO, JAMES W.;JENSEN, JAMES W. |
分类号 |
B32B27/10;B32B37/20;B41F13/02;B65H23/032;B65H23/18;B65H39/16 |
主分类号 |
B32B27/10 |
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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