US5178807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making covered soft foam article
Assignee: Namba Corp
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Filing: 1991-11-26
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Granted: 1993-01-12
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Expires: 2011-11-26
Abstract
Abstract A soft foam article (20) and a method for making the article including a permeable cover (24) of a cloth type sheet construction having an interior (26) and an exterior (28) as well as including an open cell soft polyurethane foam (30) molded in situ within the cover in direct engagement with the cover interior without permeating the cover. The soft foam article (20) includes a soft toy (22) and seating components embodied by a seat cushion (52), a seat back (54), a headrest (56), and an armrest (58). The in situ molding of the soft polyurethane foam is achieved by the use of an aqueous gel coating (34) on the cover interior (26) so as to prevent a liquid foam mixture from permeating the cover while still permitting escape of any air within the cover and of gas generated during the foaming. Best results are achieved when the aqueous gel includes water and an acrylic acid polymer that is acid neutralized to increase its viscosity to the range of about 60,000 to 100,000 centipoise and most preferably to about 80,000 centipoise.
Inventors
- 👤 Christian Thary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:20
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C44/16; A; A63; A63H; A63H3/00; A63H3/02; A63H9/00; B32; B32B; B32B5/00; B32B5/18; B32B5/20; D; D06; D06N; D06N3/00; D06N3/0043; D06N3/0045; B29K; B29K2995/00; B29K2995/0037; B29K2995/0065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A method for making a soft foam article comprising: coating the interior of a permeable cover with an aqueous gel; and introducing a foamable polyurethane liquid mixture, capable of foaming to an open cell soft foam, into the cover and foaming said mixture to fill the cover while the gel permits escape of any air within the cover and gas generated by the foaming but prevents the liquid mixture from permeating the cover as in situ molding of an open cell soft foam takes place within the cover as heat generated by the foaming dries the gel on the interior of the cover such that the foam is in direct engagement with the interior of the cover without permeating the cover.
Claim 2
Independent Claim
121 words
A method for making a soft foam article comprising: coating the interior of a permeable cover with an aqueous gel; and introducing a foamable polyurethane liquid mixture, capable of foaming to an open cell soft foam, into the cover and foaming said mixture to fill the cover while the gel permits escape of any air within the cover and gas generated by the foaming but prevents the liquid mixture from permeating the cover as in situ molding of an open cell soft foam takes place within the cover as heat generated by the foaming dries the gel on the interior of the cover such that the foam is in direct engagement with the interior of the cover without permeating the cover.
Claim 3
Dependent Claim
26 words
A method as in claim 1 wherein the aqueous gel utilized includes water and an acrylic acid polymer that is acid neutralized to increase its viscosity.
Claim 4
Dependent Claim
23 words
A method as in claim 2 wherein the aqueous gel utilized has a viscosity in the range of about 60,000 to 100,000 centipoise.
Claim 5
Dependent Claim
18 words
A method as in claim 3 wherein the aqueous gel utilized has a viscosity of about 80,000 centipoise.
Claim 6
Dependent Claim
27 words
A method as in claim 1 or 2 wherein the aqueous gel utilized includes at least one cross linker that reacts with the foamable polyurethane liquid mixture.
Claim 7
Dependent Claim
29 words
A method as in claim 1 or 2 wherein the cover utilized functions as the sole mold component during the in situ molding of the foam within the cover.
Claim 8
Dependent Claim
31 words
A method as in claim 1 or 2 which further uses a shaping member that engages the exterior of the cover to provide a portion thereof with an outwardly concave shape.
Claim 9
Independent Claim
145 words
A method for making a soft foam article comprising: coating the interior of a permeable cover with an aqueous gel including water and an acrylic acid polymer that is acid neutralized to have a viscosity in the range of about 60,000 to 100,000 centipoise; and introducing a foamable polyurethane liquid mixture, capable of foaming to an open cell soft foam, into the cover and foaming said mixture to fill the cover while the gel permits escape of any air within the cover and gas generated by the foaming but prevents the liquid mixture from permeating the cover as in situ molding of an open cell soft foam takes place within the cover as heat generated by the foaming dries the gel on the interior of the cover such that the foam is in direct engagement with the interior of the cover without permeating the cover.
Claim 10
Independent Claim
145 words
A method for making a soft foam article comprising: coating the interior of a permeable cover with an aqueous gel including water and an acrylic acid polymer that is acid neutralized to have a viscosity in the range of about 60,000 to 100,000 centipoise; and introducing a foamable polyurethane liquid mixture, capable of foaming to an open cell soft foam, into the cover and foaming said mixture to fill the cover while the gel permits escape of any air within the cover and gas generated by the foaming but prevents the liquid mixture from permeating the cover as in situ molding of an open cell soft foam takes place within the cover as heat generated by the foaming dries the gel on the interior of the cover such that the foam is in direct engagement with the interior of the cover without permeating the cover.
References Cited (Backward Citations)
US3907737A
Cited
US3852090A
Cited
US3996181A
Cited
US3932252A
Cited
US4100006A
Cited
US4304812A
Cited
US5112543A
Cited
US5061420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |