Variable mask and universal vacuum drum

Details Variable mask and universal vacuum drum Variable mask and universal vacuum drum

1996-10-21

1998-02-10

Milef, Boris

Sheet feeding or delivering

Feeding

By means to convey sheet

271196, 355 73, 355 91, 355104, 355110, 1013891, B65H 502

Patent

active

057160481

ABSTRACT:
A vacuum drum apparatus on which a mask is mounted having a resilient surface and an array of holes suitable for a substrate of a given size. The drum is a circular cylinder perforated with an array of holes. A hollow chamber within the drum is connected to a controlled pressure source for providing a vacuum. The mask may be magnetically attracted about the outer surface of the drum. Thus, the mask may be made of a flexible ferromagnetic sheet. The mask is preferably elastomeric and may include an inextensible layer.

REFERENCES:
patent: 3824927 (1974-07-01), Pugh et al.

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