Western Electric Company, Inc.

Steven Forrest North

Robert B Sprow

Barret Broyde

Judith Archer Delles

Apparatus is disclosed for printing encoded markings on elongated material comprising a first disc (41) having raised lands (46) extending between central and peripheral disc regions, and a second disc (42) mounted to the first disc flush against the raised lands. A third disc (40) having raised lands is mounted to the second disc with its raised lands flush against the second disc. Means (61, 62) are provided for altering the radial position of the first and second discs relative to each other.

Printing apparatus

Recompoundable polyvinyl chloride suitable to be recompounded for reuse, for example, in cable and wire production is recovered from a scrap material which includes plasticized polyvinyl chloride. A charge of plasticized polyvinyl chloride scrap material is treated with a solvent such as methyl ethyl ketone, tetrahydrofuran, cyclohexanone or dimethyl formamide to form a solvent mixture with one component thereof being a solvent solution of dissolved vinyl chloride polymer and plasticizers. The mixture is heated and agitated and scrap metal and other gross solids, if present, are removed. Then the solvent mixture is treated with an acid which advantageously causes a flocculation of suspended insolubles such as pigments and fillers. Except when using cyclohexanone as the solvent, the treatment with the acid must be accomplished, unexpectedly, in the presence of an additional flocculating agent such as a cellulose acetate which is soluble in the solution and which is insolubilized by the acid on refluxing. Recompoundable polyvinyl chloride is precipitated out by a non-solvent for the polyvinyl chloride which is miscible with the solvent in substantially all proportions, which will dissolve the plasticizer. The solvent and the non-solvent are removed from the plasticizer and are recovered separately by fractional distillation, for example.

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Chamblee, GA, United States of America

Steven Forrest North