Supply device for a machine working periodically on a web of mat

Details Supply device for a machine working periodically on a web of mat Supply device for a machine working periodically on a web of mat

1992-03-26

1993-12-21

Stodola, Daniel P.

Advancing material of indeterminate length

With adherence or attraction of material to advancing means

By pneumatic pressure

B65H 2012

Patent

active

052715418

ABSTRACT:
A supply device for a machine periodically working on a web of material in a stopped position, particularly a flat cutting press, comprising, upstream of the machine, a hollow suction cylinder over which the web passes before penetrating in the machine. A vacuum source is provided to create a depression and a valve is provided to cyclically vary the depression in the suction cylinder between a first, relatively high value, substantially during the phase of the cycle of the machine corresponding to the acceleration of the web, and a second, relatively low value, during the rest of the cycle.

REFERENCES:
patent: 3774829 (1973-11-01), Francia
patent: 4888848 (1989-12-01), Serracant-Clermont et al.
patent: 5094377 (1992-03-01), Stahlecker

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