Process and plant for continuous manufacture of latex foam...

Details Process and plant for continuous manufacture of latex foam... Process and plant for continuous manufacture of latex foam...

2006-09-01

2009-10-20

Johnson, Christina (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

C264S045800, C264S046400, C264S045600, C264S051000, C264S259000, C264S279100, C264S273000, C264S313000, C425S00400R, C425S034200, C425S115000, C425S346000, C425S370000, C442S030000, C442S221000, C442S315000

Reexamination Certificate

active

07604761

ABSTRACT:
Process for continuous manufacture of latex foam rest articles such as mattresses, cushions and the like comprising a part able to participate to the manufacture steps and to remain embedded in the article with consequent improvements of final performances. A flexible perforated band, preferably a flat polymeric material net with longitudinal and cross reinforcement members, is placed over a foam laying surface provided with protuberances and in continuous advancement between a foam laying station and an unlimited length article extraction station. The latex foam passes through net holes forming an upper portion and a lower portion relative to said net. The net continuously opposes contraction forces and weight force exerted from upper portion on lower portion. The unlimited length article is subjected to successive cross cuts originating rest articles wherein a foam embedded net is arranged on ends of recesses originated by the protuberances.

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