Mechanism for the variable-speed drive of the automatic sheet fe

Details Mechanism for the variable-speed drive of the automatic sheet fe Mechanism for the variable-speed drive of the automatic sheet fe

1976-02-24

1978-02-28

Wyche, Benjamin W.

Machine element or mechanism

Mechanical movements

Rotary to rotary

270 70, F16H 2114

Patent

active

040758966

ABSTRACT:
The present invention relates to a variable-speed drive mechanism for the drum of an automatic sheet feeder.
It is known that the collators for signatures and single sheets are provided with so-called automatic feeders which collate the material arranged in a pile on a collating table.
In modern machines each feeder is provided with an aspirator for removing the lower sheet from the pile so that it can be gripped by the grippers fitted to each rotating drum. In the moment in which the sheet lifted by the aspirators is gripped by the grippers, the drum must stop to allow the perfect gripping of the single sheet.
Drawbacks of the known types of automatic feeder are that the number of extracted sheets is limited, that, because of the interruption of the motion of the drum carrying the grippers, the performance of similar feeders is not quite satisfactory, that there are considerable acceleration forces which cause a rather heavy wear of the mechanical components, and that the automatic feeders of this type when operating, are rather noisy.

REFERENCES:
patent: 273509 (1883-03-01), Glass et al.
patent: 379971 (1888-03-01), Miller
patent: 954087 (1910-04-01), Goss
patent: 959354 (1910-05-01), Klinck
patent: 1413841 (1922-04-01), Fallot
patent: 2284675 (1942-06-01), Nalbach
patent: 3530731 (1970-09-01), Koch et al.

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