Methods of making foam products

• US 3,243,491 A
• Filed: 10/01/1962
• Issued: 03/29/1966
• Est. Priority Date: 10/01/1962
• Status: Expired due to Term

• Current Assignee: Eugene J. Bethe
• Original Assignee: Eugene J. Bethe
• Inventors: Bethe, Eugene J.
• Application Number:
  US04/227,245
• Time in Patent Office: 1,275 Days
• US Class Current: 264/330
• CPC Class Codes: B29C 33/0022 Multi-cavity moulds B29C33/301 takes precedence
• CPC Class Codes: B29C 33/34 movable, e.g. to or from the moulding station
• CPC Class Codes: B29C 33/3814 Porous moulds adapted for vacuum forming B29C51/365
• CPC Class Codes: B29C 33/60 Releasing, lubricating or separating agents in general C10M
• CPC Class Codes: B29C 44/58 Moulds
• CPC Class Codes: Y10S 425/201 Diverse stations
• CPC Class Codes: Y10S 521/917 Specialized mixing apparatus utilized in cell forming process

Claims

1. A METHOD OF MAKING FOAM PRODUCTS ON A POROUS SURFACE HAVING INTERSTICES OF SUFFICIENT SIZE THAT LATEX FROTH WOULD ORDINARILY PASS THERETHROUGH, COMPRISING THE STEPS OF:

APPLYING FOAM COAGULANT TO SAID SURFACE WITHOUT BLOCKING THE INTERSTICES THEREOF;

AND POURING LATEX FROTH UPON SAID SURFACE;

WHEREBY, THE FROTH THAT CONTACTS SAID COAGULANT RAPIDLY GELS TO PREVENT PASSAGE OF SAID LATEX FROTH THROUGH SAID INTERSTICES.