Material or article handling – Apparatus for moving intersupporting articles into – within,... – Stack forming apparatus
Patent
1992-08-07
1993-09-07
Huppert, Michael S.
Material or article handling
Apparatus for moving intersupporting articles into, within,...
Stack forming apparatus
271167, 414411, 414416, B65H 308
Patent
active
052422607
ABSTRACT:
Discrete light sensitive exposed but undeveloped sheets which are stacked in a dark box are transferred toward or into one or more developing machines by one or more suction cups which can jointly attract a single sheet at a time or each of which can attract the uppermost sheet of one of two or more stacks of sheets in the dark box. A suction cup which attracts a portion of the uppermost sheet of a stack in the dark box is caused to flex the attracted portion above and away from the sheet below the uppermost sheet in order to promote separation of the uppermost sheet from the remainder of the stack. The flexed uppermost sheet is then at least partially extracted from the dark box and is monitored to ascertain whether or not its underside adheres to one or more sheets. If the at least partly extracted uppermost sheet carries or entrains one or more additional sheets, all extracted sheets are returned into the dark box and the procedure is started anew but the interval and/or the extent of flexing is increased to further reduce the likelihood of adherence of one or more sheets to the underside of the extracted uppermost sheet. A visible or audible signal is generated if a certain number of successive extractions of one and the same uppermost sheet still results in simultaneous extraction of two or more sheets.
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Leithenmair Ernst
Pietsch Gerald
Agfa-Gevaert Aktiengesellschaft
Huppert Michael S.
Keenan James
Kontler Peter K.
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