Plastic article or earthenware shaping or treating: apparatus – Forming surface and means feeding fluent stock thereto
Reexamination Certificate
2007-01-09
2007-01-09
Del Sole, Joseph S. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Forming surface and means feeding fluent stock thereto
C425S207000, C425S363000, C366S071000, C366S331000
Reexamination Certificate
active
10922129
ABSTRACT:
The invention relates to a feed roll assembly for reducing leakage of an elastomeric material in a feed section of an extruder machine. A shell, feed roll seal plates, and feed roll end plates are used to reduce the leakage of elastomeric material. Elastomeric material is redirected back to the feed section through the use of a varying bore diameter of the shell and grooves contained in both the feed roll seal plates and the feed roll end plates. The shell, feed roll seal plates, feed roll end plates, and a feed roll scraper are each coated with a solid, dry lubricant coating to reduce friction. The invention provides desirable feedback of overflow elastomeric material and permits a retrofitting of the feed roll assembly to existing extruder machines.
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Bryan Jeffrey S.
Radovich John L.
Davis-Standard, LLC
Del Sole Joseph S.
Levy & Grandinetti
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