Thermoformable web support apparatus and support device for a heated plastic sheet
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United States of America Patent
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May 9, 2006
Grant Date -
Dec 16, 2004
app pub date -
Jun 12, 2003
filing date -
Jun 12, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A web conveyor is provided having a frame, a pair of conveyor rails, and at least one sag rail. The pair of conveyor rails is carried by the frame in laterally spaced-apart relation. The pair of conveyor rails is configured to support and convey respective edges of a thermoformable web of plastic material. The at least one sag rail includes a friction-reducing material provided along at least a portion of a top edge of the sag rail. The sag rail is provided between the conveyor rails and extends longitudinally along a web travel path. The sag rail is configured to support a web of material intermediate the conveyor rails. A web support apparatus having one or more of friction-reducing material, local, raised portions, and a temperature regulator is also provided.
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