Patent US4940502A successfully refreshed from Google Patents.
US4940502A
Expired / Lapsed
US
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Relating to bonded non-woven polyester fiber structures
Assignee: Invista North America LLC
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Filing: 1988-12-27
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Granted: 1990-07-10
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Expires: 2008-12-27
Abstract
Abstract A process is provided with apparatus for molding fiberballs into bonded polyester fiber structures in a continuous line system, whereby novel structures may be economically provided with advantages over bonded batts.
Inventors
- 👤 Ilan Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:20
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/04; D04H1/08; D04H1/10; D06; D06C; D06C15/00; A; A47; A47G; A47G9/00; B; B68; B68G; B68G1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/4382; D04H1/43835; D04H1/54; D04H1/558; D04H1/70; D06C7/00; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/507; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A continuous process for making a molded block of bonded polyester fiber having a cross-section of predetermined dimensions from fiberballs consisting essentially of a blend of polyester fiber with binder fiber, characterized in that said fiberballs are formed into a shaped mass, that has a cross-section with a dimension that is larger than one of said predetermined dimensions, and that is continuously advanced through a compressing stage, in which said mass is compressed transversely, and wherein said binder fiber is activated and caused to bond the polyester fiber by first heating and then cooling the mass while said mass is maintained in compressed condition.
Claim 2
Dependent Claim
104 words
A continuous process for making a molded block of bonded polyester fiber having a cross-section of predetermined dimensions from fiberballs consisting essentially of a blend of polyester fiber with binder fiber, characterized in that said fiberballs are formed into a shaped mass, that has a cross-section with a dimension that is larger than one of said predetermined dimensions, and that is continuously advanced through a compressing stage, in which said mass is compressed transversely, and wherein said binder fiber is activated and caused to bond the polyester fiber by first heating and then cooling the mass while said mass is maintained in compressed condition.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the bonded mass is cut into separate blocks.
Claim 4
Dependent Claim
18 words
A process according to claim 1 or 2, wherein the mass is heated by passing heated air therethrough.
Claim 5
Dependent Claim
12 words
A process according to claim 3, wherein the mass is heated dielectrically.
Claim 6
Dependent Claim
14 words
A process according to claim 1 or 2, wherein the mass is heated dielectrically.
References Cited (Backward Citations)
US4663225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |