Apparatus for applying, varying and removing a normal force in a

Details Apparatus for applying, varying and removing a normal force in a Apparatus for applying, varying and removing a normal force in a

1979-08-03

1981-12-15

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Separators

271126, 271160, 271165, B65H 306

Patent

active

043055770

ABSTRACT:
A normal force applicator and removal apparatus which applies, varies and removes force applied to the top of a document stack where documents are being fed, i.e., by a shingler wheel type document feeder, (also termed combing wheel or wave generator) in order to generate a shingled stack of documents for subsequent processing. The shingler wheel is adjustable so that it can be centered for document stacks of multiple lengths. In order to shingle documents at a practical and predictable rate, i.e., maintain a shingled stack of documents, and to avoid skewing of the documents as they are shingled, the normal force is varied as a function of the thickness of the document stack decreasing as the document stack is depleted, and the normal force is applied symmetrically from the center of the shingler wheel to either side thereof. This symmetrical force distribution is maintained throughout the range of adjustment of the shingler wheel.

REFERENCES:
patent: Re27976 (1974-04-01), Sahley
patent: 566670 (1896-08-01), Dummer
patent: 781504 (1905-01-01), Dummer
patent: 798857 (1905-09-01), Zander
patent: 3008709 (1961-11-01), Buslik
patent: 3823936 (1974-07-01), Quist
patent: 3861671 (1975-01-01), Hoyer
patent: 3869116 (1975-03-01), Kroeker
patent: 3937455 (1976-02-01), Hauser
patent: 3977668 (1976-08-01), Bologna
patent: 4126305 (1978-11-01), Colglazier

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