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METHOD AND APPARATUS FOR MAKING COLORED EXPANDED FOAM ARTICLES

  • US 3,791,631 A
  • Filed: 02/17/1972
  • Issued: 02/12/1974
  • Est. Priority Date: 02/17/1972
  • Status: Expired due to Term
First Claim
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1. In an apparatus for making colored expanded foam articles having a mixer head, a mixing chamber below said head, a mixer in said chamber, a discharge nozzle below and open to said chamber to receive the contents of said chamber, first and second supply pipes situated to deliver first and second liquids through said mixer head and into an upper portion of said mixing chamber, valve means to meter and control simultaneous discharge of said first and second liquids from said pipes, the improvement comprising:

  • a plurality of sources of colored third liquids each of a different hue, a third pipe extending from a first source of third liquid through said mixer head and into said chamber, adjustable valve means operative in said third pipe to permit a selected amount of said third liquid to flow into said chamber simultaneously with the delivery of said first and second liquids to said chamber, and coupling means adjacent said mixer head to permit uncoupling of said third pipe from said first source of colored liquid of a first color and coupling of said third pipe to a second source of colored liquid of a second color.

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