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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||156/556; 156/567; 156/571; 156/DIG0030; 156/DIG0031; 271/276|
|발명자 / 주소||
|출원인 / 주소||
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 5|
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 i...
1. A vacuum drum, coupled to a reversible, externally-generated vacuum source and to a source of rotational power, said drum comprising:a drum core having a flexible cylindrical side wall, a plurality of vacuum ports formed in the outer surface of said wall, and first air passages formed in said side wall coupled to said plurality of vacuum ports; first means, coupled to said drum core, having second air passages formed therein coupled to said first air passages, for coupling to said source of externally generated vacuum; and second means, coupled to sai...