Method of manufacturing cushions

• US 2,785,440 A
• Filed: 10/26/1951
• Issued: 03/19/1957
• Est. Priority Date: 10/26/1951
• Status: Expired due to Term

• Current Assignee: Harry A. Toulmin Jr
• Original Assignee: Harry A. Toulmin Jr
• Inventors: Toulmin, Harry A. Jr.
• Application Number:
  US03/253,290
• Time in Patent Office: 1,971 Days
• US Class Current: 264/416
• CPC Class Codes: A47C 7/34 with springs in compression, e.g. coiled
• CPC Class Codes: B29C 33/0033 constructed for making articles provided with holes
• CPC Class Codes: B29C 33/36 continuously movable in one direction, e.g. in a closed circuit B29C49/0021 takes precedence
• CPC Class Codes: B29C 35/08 by wave energy or particle radiation B29C64/00, B29C71/04 take precedence
• CPC Class Codes: B29C 44/58 Moulds
• CPC Class Codes: B29L 2031/751 Mattresses, cushions upholstery B29L2031/58
• CPC Class Codes: B60N 2/7052 Springs using a combination of metal and rubber
• CPC Class Codes: Y10S 264/46 Molding using an electrical heat
• CPC Class Codes: Y10S 297/01 Foam
• CPC Class Codes: Y10S 521/915 Utilizing electrical or wave energy during cell forming process
• CPC Class Codes: Y10T 29/48 Upholstered article making
• CPC Class Codes: Y10T 29/481 Method

Claims

1. A METHOD OF MANUFACTURING A SPONGE RUBBER SEAT CUSHION HAVING BODY OF SPONGE RUBBER, COMPRISING SHAPING A FABRIC ENVELOPE TO DEFINE THE CONFIGURATION OF THE CUSHION, SUPPORTING THE CONFIGURATION IN A MOLD CAVITY HAVING WALLS WHICH ARE TRANSPARENT TO INFRA-RED RAYS, CLOSING THE MOLD, INTRODUCING INTO THE MOLD AND INTO THE ENVELOPE A MASS OF UNCURED RUBBER LATEX AND FOAMING GAS UNDER PRESSURE TO THEREBY FILL THE MOLD CAVITY WITH FOAMED RUBBER, INITIALLY HEATING THE RESULTANT FILLED MOLD BY INFRARED RADIATION TO CAUSE THE FOAMED RUBBER MASS TO SET UP