Means for monitoring the side lays and masking or excess draw of

Details Means for monitoring the side lays and masking or excess draw of Means for monitoring the side lays and masking or excess draw of

1992-05-18

1993-12-07

Bollinger, David H.

Sheet feeding or delivering

Feeding

With means to align sheet

271236, 271245, 271250, 271253, B65H 900

Patent

active

052677281

ABSTRACT:
A device for monitoring the side lay marks and excess draw of a sheet fed rotary press that further ensures that sheets are at a sufficient distance from the side lay mark prior to transverse conveyance. A lateral sensor is positioned at a predetermined distance from the side lay mark so that when front sensors determine the presence of a sheet at front lay marks, the lateral sensor is evaluated. The sheet will only be conveyed transversely toward the side lay if the lateral sensor has not detected a sheet but the front sensors have, thus ensuring that the side edge of the sheet is at a sufficient distance from the side lay mark. A single sensor can also be used for all side lay mark monitoring, including monitoring for excess draw.

REFERENCES:
patent: 3743277 (1973-07-01), Bolza-Schunemann
patent: 4613125 (1986-09-01), Jeschke
patent: 5072926 (1991-12-01), Van Soest

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