Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Limited to treatment of surface or coated surface
Reexamination Certificate
2005-03-15
2005-03-15
Tentoni, Leo B. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Limited to treatment of surface or coated surface
C264S083000, C264S085000, C264S104000, C264S105000, C264S129000, C264S297100, C264S447000, C264S494000, C427S230000, C427S235000, C427S236000, C427S412300, C427S421100, C427S424000, C427S508000, C427S512000, C427S521000, C427S536000, C427S553000, C427S557000, C427S558000
Reexamination Certificate
active
06866810
ABSTRACT:
A treatment method for the internal surface of a molded polyethylene plastics material container such as a drum, including the steps of: introducing an ionizable gas, such as argon, into the container; generating a plasma of the introduced gas by applying electric field of sufficient strength to the container and introduced gas, so as to cause an interaction with the internal surface of the container; coating the internal surface of the container with a curable epoxy-based first polymeric composition; and then curing the polymeric composition to form a coating on the internal surfaces of the container. A second coating, preferably with electrical conductive properties, may be applied and cured over the first coating. Conductive properties may be provided by including conductive particles such as antimony doped tin dioxide, graphite or metal powders, in the second composition.
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Ahmed Qamar Uddin
Christy Michael David
Wallis Phillip Andrew
Andrus Sceales Starke & Sawall LLP
Harcostar Drums Limited
Tentoni Leo B.
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