发明名称 Vacuum transfer apparatus for rotary sheet-fed printing presses
摘要 A vacuum assisted sheet transfer assembly has an array of support sections which support the unprinted side of a freshly printed sheet along a sheet transfer path. The support sections overlie the airflow inlet of a manifold housing, with the longitudinal axis of each support section extending across the sheet transfer path. The support sections provide smooth surfaces for engaging and supporting the unprinted side of the sheet material as it is pulled along the transfer path while simultaneously limitting the flow of inlet air through elongated inlet apertures. As air is drawn through the inlet apertures, the unprinted side of the sheet is sucked into engagement with the support sections as it moves along the sheet transfer path. The sheet transfer assembly eliminates the need for conventional skelton wheels and the like. Marking, smearing and smudging are prevented since the printed side of the sheet is not handled or contacted in any way as the sheet is conveyed along the sheet transfer path.
申请公布号 US5133255(A) 申请公布日期 1992.07.28
申请号 US19910801550 申请日期 1991.12.02
申请人 DEMOORE, HOWARD W. 发明人 DEMOORE, HOWARD W.;SECOR, HOWARD C.
分类号 B41F21/08;B41F21/10;B41F22/00 主分类号 B41F21/08
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