US3869304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric coating by extrusion die-calendering apparatus and method
Assignee: UG Licensing Services Inc
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Filing: 1972-11-20
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Granted: 1975-03-04
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Expires: 1992-11-20
Abstract
Abstract Method and apparatus for coating a fabric with elastomeric stock, wherein improved impregnation of the interstices of the fabric is achieved, the method comprising concomitantly feeding both elastomeric stock and a fabric in pressurized contact with one another between mutually confronting stationary and movable surfaces. The mutually confronting surfaces converge toward one another and cooperatively define a pressure chamber terminating in a restriction orifice. The movable surface is driven in a direction of feed of both the stock and fabric to frictionally carry and wedge both into and through the pressure chamber, thereby causing the interstices of the fabric to be increasingly impregnated by the stock.
Inventors
- 👤 Jan Janusz Bogulslawski
- 👤 Paul Geyer
- 👤 Frederick Nishwitz Taff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:16
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/02; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/30; B29C48/305; B29C48/35; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92571; B29C2948/9258; B29C2948/9259; B29C2948/92609; B29C2948/92647; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C48/06; B29C48/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A METHOD OF COATING A FABRIC WITH ELASTOMERIC STOCK WHEREIN IMPROVED IMPREGNATION OF THE INTERSTICES OF THE FABRIC IS ACHIEVED, SAID METHOD COMPRISING CONCOMITANTLY FEEDING A FABRIC AND EXTRUDING ELASTOMERIC STOCK IN PROGRESSIVELY INCREASING PRESSURIZED CONTACT WITH SAID FABRIC BETWEEN MUTUALLY CONFRONTING STATIONARY AND MOVABLE SURFACES, ONE SURFACE CONVERGING TOWARD THE OTHER AND COOPERATIVELY DEFINING A WEDGE SHAPED PRESSURE CHAMBER TERMINATING IN A RESTRICTION ORIFICE; AND MOVING SAID MOVABLE SURFACE IN THE DIRECTION OF FEED OF BOTH SAID STOCK AND FABRIC TO FRICTIONALLY CARRY AND WEDGE SAID STOCK AND FABRIC INTO AND THROUGH BOTH SAID CHAMBER AND RESTRICTION ORIFICE DURING WHICH INTERSTICES OF SAID FABRIC ARE INCREASINGLY IMPREGNATED BY SAID STOCK AS THE LATTER
Claim 2
Independent Claim
114 words
A METHOD OF COATING A FABRIC WITH ELASTOMERIC STOCK WHEREIN IMPROVED IMPREGNATION OF THE INTERSTICES OF THE FABRIC IS ACHIEVED, SAID METHOD COMPRISING CONCOMITANTLY FEEDING A FABRIC AND EXTRUDING ELASTOMERIC STOCK IN PROGRESSIVELY INCREASING PRESSURIZED CONTACT WITH SAID FABRIC BETWEEN MUTUALLY CONFRONTING STATIONARY AND MOVABLE SURFACES, ONE SURFACE CONVERGING TOWARD THE OTHER AND COOPERATIVELY DEFINING A WEDGE SHAPED PRESSURE CHAMBER TERMINATING IN A RESTRICTION ORIFICE; AND MOVING SAID MOVABLE SURFACE IN THE DIRECTION OF FEED OF BOTH SAID STOCK AND FABRIC TO FRICTIONALLY CARRY AND WEDGE SAID STOCK AND FABRIC INTO AND THROUGH BOTH SAID CHAMBER AND RESTRICTION ORIFICE DURING WHICH INTERSTICES OF SAID FABRIC ARE INCREASINGLY IMPREGNATED BY SAID STOCK AS THE LATTER
Claim 3
Dependent Claim
20 words
A method as claimed in claim 1 wherein the movable surface is an arcuate segment of a cylindrical driven roller.
Claim 4
Dependent Claim
38 words
A method as claimed in claim 2 including extruding said elastomeric stock through said chamber along a stationary die-blade having a contoured concavity confronting said arcuated section of said driven roller, said contoured concavity constituting said stationary surface.
Claim 5
Dependent Claim
71 words
A method as claimed in claim 1, including extruding said elastomeric stock and feeding said fabric in contact with one another upstream of said wedge-shaped chamber along a preliminary chamber alsO defined by said movable and stationary surfaces, and exerting a less pressure on said elastomeric stock and fabric in said preliminary chamber to effect initial penetration of the interstices of said fabric by said stock without finally shaping the latter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |