Method and apparatus for stacking, aligning and compressing sign

Details Method and apparatus for stacking, aligning and compressing sign Method and apparatus for stacking, aligning and compressing sign

1990-06-06

1992-03-03

Olszewski, Robert P.

Presses

Reciprocating press construction

With material rebound restrainer

53528, 53529, 271213, 271220, B30B 1500

Patent

active

050922360

ABSTRACT:
An overlapping signature stream is aligned, squeezed and formed into a stack which is dropped onto a rotatable platform of a lower bin. The platform is raised to reduce the distance between the lower bin and the platform. Pivotally mounted compression clips have compression arms which are pushed into the supports by the dropping stack. The platform lowers the stack beneath the clips enabling them to resume their normal horizontal orientation. The platform is raised to compress the stack between the platform and the clip arms. The platform is then lowered and rotated 180 degrees to receive the next stack and form a compensated bundle. The platform is split, providing a gap enabling passage of a pusher arm to eject a completed bundle. The pusher arm can move through the gap as the platform is raised to significantly reduce cycle time. The proximity sensors preposition the pusher from a position allowing unobstructed rotation to a position adjacent one side of a bundle while the turntable lowers further reducing cycle time. Upper compression clips are provided to compress a full bundle.

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