Method and apparatus for refurbishment of plastic containers

Details Method and apparatus for refurbishment of plastic containers Method and apparatus for refurbishment of plastic containers

1982-08-30

1984-10-23

Lieberman, Paul

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

Solvent polishing type

264 83, 264237, 264345, B29C 2500

Patent

active

044787812

ABSTRACT:
Polycarbonate water bottles are refurbished by automated cycling through conveyor system having a loading and unloading section, a temperature adjusting section, a vapor exposure section, and a cooling and curing section. Each of the sections are associated in a continuous circuit by means of a conveyor system which conveys a plurality of bottles through the refurbishing system. Each bottle is first heated to not less than 103.degree. F. and then cooled to a predetermined state wherein the thinner portions of each bottle are at a temperature in the range of 75.degree.-80.degree. F. and the thicker portions are at a temperature in the range of 90.degree.-95.degree. F. Each bottle is then subjected to a dichloromethane vapor cloud for at least 10 seconds, during which time the skin layer becomes fluidic and the surface tension causes all blemishes and scratches to be removed. The bottle is then cooled, hardened and degassed during its return trip through the cooling and curing section, after which it is unloaded and is ready for refilling.

REFERENCES:
patent: 3327033 (1967-06-01), Koch et al.
patent: 3541200 (1970-11-01), Niegisch
patent: 3546331 (1970-12-01), Niegisch
patent: 3808301 (1974-04-01), Pruden
patent: 3886253 (1975-05-01), Friendship
patent: 3971173 (1976-07-01), Friendship
patent: 4342718 (1982-08-01), Caratsch

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