Double-document detection arrangement

Details Double-document detection arrangement Double-document detection arrangement

1997-09-22

1999-06-01

Bollinger, David H.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

B65H 712

Patent

active

059081910

ABSTRACT:
A method for on-the-fly detection and separation of multiple checks or like documents transported in a track, wherein the documents are first subjected to twin opposed vacuum forces from a suction source, to separate multiple documents; then a measuring and analysis of the resulting pressure differentials is taken within the vacuum-forming system; the system being provided with a cyclonic filter-separator upstream of the suction source, for removing a storing dust and debris entrained within the vacuum-forming air flow; the cyclonic filter-separator being designed to provide constant vacuum-forming airflow regardless of the nature or quantity of debris removed and collected; the system also being provided with a pressure sensor to give clear indication of the separated/unseparated state of the passing documents, and to exhibit a variable damping accessory.

REFERENCES:
patent: 3516551 (1970-06-01), Wallen et al.
patent: 3773321 (1973-11-01), Burroughs
patent: 5671919 (1997-09-01), Chen et al.

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