公开(公告)号：US3991882A

公开(公告)日：1976-11-16

申请号：US582226

申请日：1975-05-30

申请人： Melvin R. Fahnestock ,  Kirby I. Thornton

发明人： Melvin R. Fahnestock ,  Kirby I. Thornton

IPC分类号： B07C5/34 ,  B07C5/344

CPC分类号： B07C5/3404 ,  B07C5/365 ,  G01N21/909 ,  Y10S209/928

摘要： An apparatus and method are disclosed for inspecting a series of can ends as they come off a forming press wherein the can ends are carried on a continuous belt which moves them through the forming press and then past a light source and a light detecting means which senses any light passing through each of the can ends as they are presented seriatim to the light source and sensing means. The light source is fixedly positioned on one side of the continuous belt and the sensing means is fixedly positioned on the other side of the belt. An extensible bellows, sealed against the light sensing means, is connected to a ram on the forming press which extends and contracts the bellows into and out of light tight sealing engagement with each of the can ends as it is presented for inspection. The light source and the light sensing means are both activated when the bellows is in light tight engagement against a can end to expose one side of the can end to light and sense whether any light passes through such can end.