US3768171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying wet elastomeric material
Assignee: US RUBBER RECLAIMING CO Inc
•
Filing: 1971-08-16
•
Granted: 1973-10-30
•
Expires: 1991-08-16
Abstract
Abstract Excess water is removed from wet elastomeric material such as clean-up from the floor of a synthetic rubber plant by advancing the material along a vented system of passageways of decreasing size to compress the material and progressively drive water out of it, and regurgitate it along the way, while maintaining a pressure of from 400 to 1,200 pounds per square inch and a temperature of from 200* to 350* F, and straining to provide materials adapted for normal utilization in producing rubber and like products.
Inventors
- 👤 W Bird
- 👤 Grone B La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/12; B29; B29B; B29B13/00; B29B13/06; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/03; B29C48/04; B29K; B29K2021/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A process of drying wet elastomeric material which comprises simultaneously advancing through a restricted area and compressing continuously-supplied wet elastomeric material while venting water therefrom, regurgitating the material by moving it against a barrier during its further advance to release and expel additional water, further compressing the material during its further advance to exert an increased squeezing action which expels still more water, and then advancing the material against an outlet having a still more restricted area while building up in the wet material a pressure of from 400 to 1,200 lbs. per square inch and a temperature from about 15* to 350* F. to eliminate additional water, said advancing actions being substantially unidirectional.
Claim 2
Dependent Claim
114 words
A process of drying wet elastomeric material which comprises simultaneously advancing through a restricted area and compressing continuously-supplied wet elastomeric material while venting water therefrom, regurgitating the material by moving it against a barrier during its further advance to release and expel additional water, further compressing the material during its further advance to exert an increased squeezing action which expels still more water, and then advancing the material against an outlet having a still more restricted area while building up in the wet material a pressure of from 400 to 1,200 lbs. per square inch and a temperature from about 15* to 350* F. to eliminate additional water, said advancing actions being substantially unidirectional.
Claim 3
Dependent Claim
14 words
A process as in claim 1 wherein said venting is principally of liquid water.
Claim 4
Dependent Claim
18 words
A process as in claim 1 wherein said venting is principally of vaporized water through the continuously-supplied material.
Claim 5
Dependent Claim
43 words
A prOcess as in claim 1 wherein the material is strained through a multiplicity of small openings at the outlet where the pressure at said temperatures exceeds the vapor pressure of the water, and there is a venting of steam at the outlet.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |