Variable mask and universal vacuum drum

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

1997-06-20

1999-02-02

Milef, Boris

Sheet feeding or delivering

Feeding

By means to convey sheet

271196, 355 73, 1013891, 346138, 399305, B65H 502

Patent

active

058654330

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.

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Patent Abstracts of Japan, vol. 16, No. 531 (M-1333), Oct. 30, 1992 & JP, A,04 197915 (Seiko Epson Corp), Jul. 17, 1992 (Abstract).

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