Patent US4274821A successfully refreshed from Google Patents.
US4274821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die for extruding reinforced fabric
Assignee: Steelastic Co LLC
•
Filing: 1980-02-28
•
Granted: 1981-06-23
•
Expires: 2000-02-28
Abstract
Abstract A die (12) for extruding an elastomeric ribbon (14) reinforced with laterally spaced longitudinal filaments (13), said die having mating die blocks (17 and 18) enclosing mating die plates (15 and 16) embracing a filament guide insert (25), and said insert being undercut at (38) to form a flat surface (39) having exposed grooves (42) which are extensions of the filament guide passageways (26), whereby the exiting portions of the filaments (13) are partially encapsulated with elastomeric material while in said grooves (42).
Inventors
- 👤 Ralph F. Kiemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:07
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/525; B29C70/526; B29C48/00; B29C48/03; B29C48/07; B29C48/15; B29C48/156; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/32; B29C48/34; B29D; B29D30/00; B29D30/06; B29D30/38; B29D2030/381; B29K; B29K2021/00; B29L; B29L2030/00; B29L2030/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A die for extruding an elastomeric ribbon reinforced with laterally spaced longitudinal filaments, said die enclosing a guide insert having uniformly laterally spaced co-planar filament guide passageways therethrough, said insert being undercut on one side at its discharge end to form exposed groove extensions of said guide passageways, and said die having passageways forming a constricted throat around the discharge end of said insert for extruding elastomeric material around filaments emerging therefrom, whereby the exiting portions of said filaments are partially encapsulated before they leave the groove extensions.
Claim 2
Dependent Claim
88 words
A die for extruding an elastomeric ribbon reinforced with laterally spaced longitudinal filaments, said die enclosing a guide insert having uniformly laterally spaced co-planar filament guide passageways therethrough, said insert being undercut on one side at its discharge end to form exposed groove extensions of said guide passageways, and said die having passageways forming a constricted throat around the discharge end of said insert for extruding elastomeric material around filaments emerging therefrom, whereby the exiting portions of said filaments are partially encapsulated before they leave the groove extensions.
Claim 3
Dependent Claim
20 words
A die as described in claim 1, wherein said filament guide passageways are cylindrical and said groove extensions are semi-cylindrical.
Claim 4
Dependent Claim
25 words
A die as described in claim 1, wherein the guide insert is held between the discharge ends of mating die plates enclosed within the die.
Claim 5
Dependent Claim
39 words
A die as described in claim 3, wherein said undercut discharge end of said insert forms a flat surface in the plane of the axes of the guide passageways, and said groove extensions are formed in said flat surface.
Claim 6
Dependent Claim
38 words
A die, as described in claim 1, wherein the discharge end of said insert has converging inclined surfaces forming a nib, one of said inclined surfaces being undercut relative to the other to form the exposed groove extensions.
Claim 7
Dependent Claim
25 words
A die as described in claim 5, wherein the guide insert is held between the discharge ends of mating die plates enclosed within the die.
Claim 8
Dependent Claim
20 words
A die as described in claim 6, wherein said filament guide passageways are cylindrical and said groove extensions are semi-cylindrical.
Claim 9
Dependent Claim
39 words
A die as described in claim 7, wherein said undercut discharge end of said insert forms a flat surface in the plane of the axes of the guide passageways, and said groove extensions are formed in said flat surface.
References Cited (Backward Citations)
US2979431A
Cited
US3616496A
Cited
US3697209A
Cited
US3758247A
Cited
US3803695A
Cited
US4150929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |