Segmented vacuum roll

Details Segmented vacuum roll Segmented vacuum roll

2002-04-16

2004-05-25

Matecki, Kathy (Department: 3654)

Advancing material of indeterminate length

With adherence or attraction of material to advancing means

By pneumatic pressure

C226S110000

Reexamination Certificate

active

06739489

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a vacuum roll for conveying webs and, more particularly, to a vacuum roll having several segments each of which being able to convey a separate web resulting, for instance, from a main web split into several webs of smaller wide.
BACKGROUND OF THE INVENTION
Webs such as polymeric foils (like polyester foils) or other sheet materials are manufactured in a continuous process and the final products are wound up on rolls for storage and transportation. On such production lines or on converting rewinding machines, vacuum rolls may be used to transport, pull, guide (or even dry) the web.
Those vacuum rolls are known in the art for a long time.
However, on the production line or on a converting equipment, the web may be split into several lanes and each lane may have to be transported, pulled or guided individually, at a speed different from the speed of the other lanes.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a segmented vacuum roll each segment of which is rotatable independently from the other segments so that each segment drives a respective web at an own speed according to the need of the process.


REFERENCES:
patent: 3125265 (1964-03-01), Warren et al.
patent: 3549098 (1970-12-01), Helkala
patent: 3586225 (1971-06-01), Takata
patent: 3587962 (1971-06-01), Herzhoff et al.
patent: 5915648 (1999-06-01), Madrzak et al.
patent: 6250581 (2001-06-01), Cramer
patent: 6328194 (2001-12-01), Meschenmoser
patent: 6427941 (2002-08-01), Hikita
patent: 708853 (1931-07-01), None
patent: 2202507 (1974-03-01), None

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