Lightweight vacuum drum
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United States of America Patent
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Feb 19, 2002
Grant Date -
N/A
app pub date -
Sep 8, 1999
filing date -
Sep 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lightweight vacuum drum for use in labeling and similar applications having components constructed of castable, non-metal materials. The vacuum drum includes a main drum core having a flexible cylindrical wall casting, investment casting or extrusion of polymeric material coupled to a polymeric bottom ring. A support flange is formed from either aluminum or a polymeric material and is fastened to the cylindrical wall and bottom ring castings. The cylindrical wall includes air passages in fluid communication with radially extending vacuum ports formed in the outer surface of the side wall to provide a vacuum conduit to the outer surface of the cylindrical wall.
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