Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1996-11-26
1998-12-08
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 462, 264 465, 264145, 264293, 264912, B29C 4420, B29C 4424, B29C 4406
Patent
active
058464611
ABSTRACT:
A novel polyurethane foam is shown which uses ground vehicle tires as a filler material. A method of manufacturing a carpet pad using the novel polyurethane composition is also shown. A frame is provided to which is mounted a conveyor belt. The conveyor belt feeds a first liner having an exposed surface of the polyurethane foam along a conveyor path from a forward end to a rearward end. A foam spray assembly is connected to a conventional uncured polymeric foam supply having a spray nozzle mounted adjacent to the forward end of the conveyor path. The spray nozzle dispenses uncured, resilient polymeric foam as a generally uniform layer on a surface of the first liner of previously cured polyurethane. A second conveyor belt, parallel to the first conveyor belt, feeds a second liner sheet along the conveyor path so that the second liner sheet is positioned over the layers of foam laminate. As the layers of foam laminate pass along the conveyor path, the foam material is sandwiched between the first and second liners and is compressed between the conveyor belts to a selected thickness. This laminated foam is then heated to cure the upper layer of foam.
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Collins Burley Burk
Collins Miller Durrett
Ridge Charles A.
Gunter Jr. Charles D.
Kuhns Allan R.
National Foam Cushion Manufacturing, Inc.
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