发明名称 |
Air-bearing center-guiding apparatus and method |
摘要 |
An air-bearing center-guiding apparatus 10 and a method are disclosed for supporting and laterally center-guiding thin flexible webs of paper or plastic under 15 mils in thickness. The apparatus comprises a web support and guide member 22 having an inner surface and an outer web-facing surface. Parallel rows of elongated spaced-apart guide apertures 34 extend longitudinally along edge regions of the web. Each guide aperture 34 is formed from a cylindrical opening in the web support and guide member 22 and extends substantially perpendicular to the web. Within each aperture a flat-sided dowel 60 is mounted to define a flow passage shaped in cross-section like a segment of a circle 62. Each circular-segment guide aperture 34 has a straight side 54 and a curved side 52 for directing a jet of air against the web edge 56. A plurality of the circular-segment guide apertures 34 develop a guiding force for holding lateral movement of the web to plus or minus 0.001 inch (0.0254 mm). A row of web-support apertures 32, separate from the guide apertures 34, is provided between the rows of guide apertures 34 to form an air bearing for supporting the web.
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申请公布号 |
US4892243(A) |
申请公布日期 |
1990.01.09 |
申请号 |
US19880247224 |
申请日期 |
1988.09.21 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
LONG, MICHAEL;PALONE, THOMAS W.;KEMP, PAUL |
分类号 |
B65H20/10;B65H23/02;B65H23/032;B65H23/24 |
主分类号 |
B65H20/10 |
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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