Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1994-03-15
1998-05-26
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 464, 264 465, 2642711, 264278, 264338, B29C 4406, B29C 4412
Patent
active
057560226
ABSTRACT:
A method for forming a foamed innerspring unit is provided including releasably securing a plurality of coils to a jig, delivering a foamable reaction mixture to a tray and positioning the jig so that the ends of the coils extending away from the jig are spaced from the bottom of the tray so that the rising foam embeds the end of the coil. The process is repeated by releasing the foamed layer embedding one end of the coils, releasably holding the first foam layer with the ends thereof spaced from a tray having said foamable reaction mixture therein so that the second end of the coils is embedded a second foam layer. A mattress formed of a plurality of innerspring unit sections formed in accordance with the foregoing may be combined within a cover to define a mattress. By selecting the firmness of the coils of adjacent sections, regions of differing firmness can be provided in the mattress.
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Gamble Nolan D.
Monchiero Giovanni
Siegel Edmond
Gamble Nolan D.
Kuhns Allan R.
Siegel Edmond
Tec Mac S.r.l
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