Method for making foam backrests for vehicle reclining chairs

• US 3,264,382 A
• Filed: 09/18/1963
• Issued: 08/02/1966
• Est. Priority Date: 09/18/1963
• Status: Expired due to Term

• Current Assignee: Angell, Robert C., Kolk, Stephen B.
• Original Assignee: Angell, Robert C., Kolk, Stephen B.
• Inventors: Angell, Robert C., Kolk, Stephen B.
• Application Number:
  US04/309,813
• Time in Patent Office: 1,049 Days
• US Class Current: 264/46.4
• CPC Class Codes: B29C 33/14 against the mould wall
• CPC Class Codes: B29C 33/30 Mounting, exchanging or centering moulds, mould parts or cores; B29C33/485 takes precedence
• CPC Class Codes: B29C 44/0461 by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
• CPC Class Codes: B29L 2031/58 Upholstery or cushions, e.g. vehicle upholstery or interior padding mattresses, cushions B29L2031/751
• CPC Class Codes: B29L 2031/771 Seats

Claims

1. IN A METHOD FOR FORMING A CHAIR FOAM BACKREST HAVING AN OUTWARDLY-CONTOURED HEADREST OF GREATER RESILIENCE THAN THE BODY OF THE BACKREST, THE STEPS OF PREFORMING A RECTANGULAR RESILIENT THICK FOAM HEADREST CUSHION OF LOW-DENSITY TYPE FOAMABLE PLASTIC MATERIAL WITH THE BUTT ENDS OF THE CUSHION TO BEND IT INTO A CURVED DIRECTION, FLEXING SAID CUSHION TO BEND IT INTO A CURVED BODY WITH SAID BUTT ENDS FACING SUBSTANTIALLY IN THE SAME DIRECTION, SECURING SAID BODY WHILE IN SAID FLEXED AND CURVED POSITION WITHIN A MOLD CONFORMING GENERALLY TO THE SHAPE OF THE FINISHED BACKREST, INTRODUCING A HIGHDENSITY TYPE FOAMABLE PLASTIC MATERIAL INTO THE MOLD TO