US4769202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a conveyor belt
Assignee: Goodrich Corp
•
Filing: 1987-07-07
•
Granted: 1988-09-06
•
Expires: 2007-07-07
Abstract
Abstract An apparatus and method for producing a conveyor belt made of urethane having reinforcement embedded therein which reinforcement permits the stretching of the belt under controlled conditions. The reinforcement consists of a fabric or a plurality of aligned strands that are embedded in the urethane body of the belt proper that allow for a controlled stretch in the conveyor belt until such fabric or cords limit the stretching of such belt.
Inventors
- 👤 Richard E. Eroskey
- 👤 Winthrop S. Worcester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:20
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C39/00; B29C39/14; B29C70/28; B29C70/40; B29C70/50; B29D; B29D29/00; B29D29/06; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/34; B65G15/36; B29K; B29K2075/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2105/10; B29K2105/101; B29L; B29L2031/00; B29L2031/709; B29L2031/7092; B65G2201/00; B65G2201/06; Y; Y10; Y10S; Y10S425/00; Y10S425/818; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A method of making a reinforced conveyor belt comprising the steps of feeding a single ply fabric in a longitudinal direction wherein said fabric has a plurality of warp cords disposed in a non-linear path that is parallel to said longitudinal direction, pouring a quick setting liquid polyurethane onto a moving carrier member, embedding said fabric into said liquid polyurethane along the mid center thereof, curing said liquid polyurethane to form a polyurethane with said fabric embedded along the mid center thereof to provide a limited stretch to said polyurethane belt as limited by said warp codes of said fabric in said belt.
Claim 2
Independent Claim
103 words
A method of making a reinforced conveyor belt comprising the steps of feeding a single ply fabric in a longitudinal direction wherein said fabric has a plurality of warp cords disposed in a non-linear path that is parallel to said longitudinal direction, pouring a quick setting liquid polyurethane onto a moving carrier member, embedding said fabric into said liquid polyurethane along the mid center thereof, curing said liquid polyurethane to form a polyurethane with said fabric embedded along the mid center thereof to provide a limited stretch to said polyurethane belt as limited by said warp codes of said fabric in said belt.
Claim 3
Dependent Claim
34 words
The method of making a reinforced conveyor belt as set forth in claim 1, wherein said fabric has weft cords woven in with said warp cords to provide said limited stretch to said belt.
Claim 4
Independent Claim
120 words
A method of making a reinforced polyurethane conveyor belt comprising the steps of directing a plurality of parallel cords in laterally spaced alignment along a horizontal plane in a longitudinal direction, imparting a non-linear wavy configuration in a horizontal plane to said cords as said cords are delivered to a moving belt forming mold, embedding said cords in said non-linear configuration along a horizontal plane in a gelling liquid polyurethane body that is delivered to said moving mold, and curing said polyurethane body with said cords embedded therein in said non-linear wavy configuration that lie in a single horizontal plane that lies along the central mid plane of said belt as said belt is discharged from said moving belt mold.
Claim 5
Independent Claim
120 words
A method of making a reinforced polyurethane conveyor belt comprising the steps of directing a plurality of parallel cords in laterally spaced alignment along a horizontal plane in a longitudinal direction, imparting a non-linear wavy configuration in a horizontal plane to said cords as said cords are delivered to a moving belt forming mold, embedding said cords in said non-linear configuration along a horizontal plane in a gelling liquid polyurethane body that is delivered to said moving mold, and curing said polyurethane body with said cords embedded therein in said non-linear wavy configuration that lie in a single horizontal plane that lies along the central mid plane of said belt as said belt is discharged from said moving belt mold.
Claim 6
Dependent Claim
25 words
The method of making a reinforced polyurethane belt as set forth in claim 3 wherein said imparting of a non-linear configuration is a sine-wave configuration.
Claim 7
Dependent Claim
37 words
The method of making a reinforced polyurethane belt as set forth in claim 4 wherein said liquid polyurethane is a low molecular weight polymer basic intermediate with a hydroxyl end group that solidifies into a transparent solid.
Claim 8
Dependent Claim
39 words
The method of making a reinforced polyurethane belt as set forth in claim 5 wherein said imparting of a non-linear configuration is provided to limit the stretching of said cured polyurethane belt to 10 percent of its original length.
Claim 9
Dependent Claim
22 words
The method of making a reinforced polyurethane belt as set forth in claim 6 wherein said directing of cords are textile cords.
Claim 10
Independent Claim
87 words
A method of making a reinforced conveyor belt comprising the steps of directing a plurality of laterally spaced cords in a longitudinal direction, feeding a carrier member with side portions in said longitudinal direction, imparting a serpentine configuration to said cords while feeding in said longitudinal direction, pouring a quick setting polyurethane onto said carrier member while embedding said cords therein along a horizontal plane, and curing said polyurethane while embedding said cords therein with said serpentine configuration and with said cords lying in said horizontal plane.
Claim 11
Independent Claim
87 words
A method of making a reinforced conveyor belt comprising the steps of directing a plurality of laterally spaced cords in a longitudinal direction, feeding a carrier member with side portions in said longitudinal direction, imparting a serpentine configuration to said cords while feeding in said longitudinal direction, pouring a quick setting polyurethane onto said carrier member while embedding said cords therein along a horizontal plane, and curing said polyurethane while embedding said cords therein with said serpentine configuration and with said cords lying in said horizontal plane.
Claim 12
Dependent Claim
42 words
A method of making a reinforced conveyor belt as set forth in claim 8 wherein said cords are fed in said longitudinal direction along said horizontal plane that is equidistant from the top surface and bottom surface of the formed conveyor belt.
References Cited (Backward Citations)
AT40360B
Cited
US1923710A
Cited
US2425575A
Cited
US2828795A
Cited
GB826412A
Cited
US3007205A
Cited
US3301932A
Cited
US3415700A
Cited
US3278667A
Cited
US3509006A
Cited
US3441641A
Cited
US3443003A
Cited
US3615152A
Cited
US3616496A
Cited
US3616129A
Cited
US3791900A
Cited
US3876485A
Cited
US3972667A
Cited
US3917439A
Cited
US3973670A
Cited
US4094402A
Cited
US4064915A
Cited
US4165955A
Cited
GB2009270A
Cited
US4226417A
Cited
US4375920A
Cited
US4209089A
Cited
FR2446876A1
Cited
US4216177A
Cited
CA1161385A
Cited
EP0074325A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |