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2. 发明申请

US20040032079A1 Batch sheet feeding 有权
公开(公告)号：US20040032079A1
公开(公告)日：2004-02-19
申请号：US10222895
申请日：2002-08-19
申请人： Longford Equipment International Limited
发明人： Edward J. Cook
IPC分类号： B65H043/04 , B65H029/20
CPC分类号： B65H29/145 , B65H33/16 , B65H2301/4213 , B65H2301/432 , B65H2301/4353 , B65H2301/4476 , B65H2511/40 , B65H2220/01
摘要： A batch sheet feeder has an upstream first conveyor section arranged to convey sheets singly in a downstream direction to a downstream second conveyor section. The second conveyor section has an upper second conveying section and a lower second conveying section forming a gap therebetween. The gap is largest at an upstream end of the second conveyor section and diminishes in size toward a downstream end of the second conveyor section. A gate positioned proximate the downstream end of the second conveyor section selectively blocks sheets fed along the second conveyor section. In another embodiment, the sheet feeder has a sheet conveyor, sheet sensor, and visual attribute sensor. The visual attribute sensor has a field of view covering an area of the conveyor at a certain downstream location so as to sense an area of any sheet on the conveyor at this downstream location. The visual attribute sensor can compare a sensed area of a sheet at the downstream location with a stored visual attribute. In this way, where the sheets of a batch are different, the visual attribute sensor can be used to verify that a sheet of a batch has visual characteristics matching those of the expected sheet at that ordinal position in the batch. This assists in ensuring a batch is not faulty. In a related method of verifying batches of sheets, for each sheet at a given ordinal position in each batch a visual attribute measure for at least an area of the sheet is obtained. A comparison is made of the visual attribute measure with a stored visual attribute measure. Each batch is selectively verified based on this comparison.

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