Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1992-06-03
1993-11-23
Skaggs, H. Grant
Sheet feeding or delivering
Feeding
Separator and conveyor
271105, 271236, 271250, 271171, B65H 508
Patent
active
052636992
ABSTRACT:
A side edge alignment system for pre-aligning side edges of sheet stock prior to feeding them into a printing press employs a sheet engaging vacuum suction member driven reciprocatingly across the feed path of the press. As the member travels towards a side alignment stop the engaged sheet is aligned upon engaging the stop. The suction level is adjustable so that the suction member disengages to slide over the top surface of the aligned sheet after engagement with the side alignment stop. Suction is terminated before the return stroke of the suction member. For stack feeding operations the side alignment stop is configured as a rail having planar upper and lower vertical wall surfaces, the upper being offset away from the suction member. Initial stack alignment is secured by lower elements of the stack engaging the lower face of the side alignment stop, leaving upper sheets at a standoff distance from the upper stop surface. Movement of the top sheet by the suction number causes it to move towards and into engagement with the upper surface of the side alignment stop.
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Radic Vlado
Selak Martin M.
Druzbick Carol Lynn
Skaggs H. Grant
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