专利名称：Web feeding machines 发明人：Jeffrey Isherwood美国的英语怎么说
申请号：US06/273151
张家界景区申请日：19810612
公开号：US04369906A
指法图>手机qq邮箱公开日：
19830125
专利内容由知识产权出版社提供
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蓝光光盘摘要：A web feeding machine for controlling the feed of a web of material compris a first pair of rollers which bear against one another to form a first nip, a cond pair of rollers which bear against one another to form a cond nip downstream from the first nip, means to cau the ratio of the linear speed of the web through the cond nip to that through the first nip to be a constant and to have a value greater than one, a variable speed drive for driving the nip rollers, means for monitoring the tension T.sub.1 in the web upstream from the first nip and the tension T.sub.2 between the first and cond nips, and control means to control the variable speed drive of the rollers so that the angular velocity &ohgr; of the rollers satisfies the expression: ##EQU1## where A, B and C are constants. By controlling the angular velocity of the rollers and hence the linear speed of the web in accordance with this expression, a constant flow rate of the web is ensured irrespective of the elasticity of the web or the overall speed of its feed.
申请人：CROSFIELD ELECTRONICS LIMITED
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代理机构：Sughrue, Mion, Zinn, Macpeak and Seas
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