US2582294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous method for cooling and shaping thermoplastics
Assignee: Dow Chemical Co
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Filing: 1947-10-31
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Granted: 1952-01-15
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Expires: 1967-10-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Stober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/16; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/38; B29B; B29B9/00; B29B9/02; B29B9/06; B29C48/00; B29C48/001; B29C48/0011; B29C48/0022; B29C48/15; B29C48/154; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29K; B29K2025/00; Y; Y10; Y10S; Y10S425/00; Y10S425/101; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
IN A METHOD OF COOLING AND SHAPING HEATPLASTIFIED ORGANIC RESINS IN THE CONTINUOUS MANNER, THE STEPS OF FEEDING A HEAT-PLASTIFIED RESIN TO THE OUTER SURFACE OF A ROTATING DRUM HAVING AT ITS PERIPHERY A SERIES OF ANNULAR GROOVES AND RIDGES, CARRYING THE RESIN ON PERIPHERAL SURFACES OF THE DRUM THROUGHOUT A SUBSTANTIAL PORTION OF THE TRAVEL INVOLVED IN A SINGLE REVOLUTION OF THE DRUM, DURING SAID TRAVEL REPEATEDLY PRESSING THE RESIN AS A LAYER AGAINST THE DRUM SURFACE TO CAUSE THE RESIN LAYER TO CONFORM TO THE PERIPHERAL SURFACES OF THE DRUM AND TO BRING THE WALL-THICKNESS OF THE RESIN LAYER TO A VALUE NOT GREATER THAN 0.5 INCH, AND AT THE SAME TIME PASSING A COOLING FLUID THROUGH THE DRUM TO COOL THE RESIN IN IMMEDIATE CONTACT THEREWITH TO APPROXIMATELY ITS HEAT DISTORTION TEMPERATURE WHILE INNER PORTIONS OF THE RESIN LAYER ARE AT TEMPERATURE AS HIGH AS THE HEAT DISTORTION TEMPERATURE OF THE RESIN AND, WHILE AT SAID TEMPERATURE, WITHDRAWING THE RESULTANT SHAPED SHEET OF RESIN (WHICH IS IN THE FORM OF A WEB CONSISTING OF DISTINCT STRIPS, OR RODS, CONNECT LONGITUDINALLY IN SIDE BY SIDE RELATION TO ONE ANOTHER) FROM THE DRUM BEFORE THE LAYER OF RESIN HAS BEEN CARRIED ON THE DRUM A DISTANCE CORRESPONDING TO A COMPLETE REVOLUTION OF THE LATTER.
Claim 2
Dependent Claim
215 words
IN A METHOD OF COOLING AND SHAPING HEATPLASTIFIED ORGANIC RESINS IN THE CONTINUOUS MANNER, THE STEPS OF FEEDING A HEAT-PLASTIFIED RESIN TO THE OUTER SURFACE OF A ROTATING DRUM HAVING AT ITS PERIPHERY A SERIES OF ANNULAR GROOVES AND RIDGES, CARRYING THE RESIN ON PERIPHERAL SURFACES OF THE DRUM THROUGHOUT A SUBSTANTIAL PORTION OF THE TRAVEL INVOLVED IN A SINGLE REVOLUTION OF THE DRUM, DURING SAID TRAVEL REPEATEDLY PRESSING THE RESIN AS A LAYER AGAINST THE DRUM SURFACE TO CAUSE THE RESIN LAYER TO CONFORM TO THE PERIPHERAL SURFACES OF THE DRUM AND TO BRING THE WALL-THICKNESS OF THE RESIN LAYER TO A VALUE NOT GREATER THAN 0.5 INCH, AND AT THE SAME TIME PASSING A COOLING FLUID THROUGH THE DRUM TO COOL THE RESIN IN IMMEDIATE CONTACT THEREWITH TO APPROXIMATELY ITS HEAT DISTORTION TEMPERATURE WHILE INNER PORTIONS OF THE RESIN LAYER ARE AT TEMPERATURE AS HIGH AS THE HEAT DISTORTION TEMPERATURE OF THE RESIN AND, WHILE AT SAID TEMPERATURE, WITHDRAWING THE RESULTANT SHAPED SHEET OF RESIN (WHICH IS IN THE FORM OF A WEB CONSISTING OF DISTINCT STRIPS, OR RODS, CONNECT LONGITUDINALLY IN SIDE BY SIDE RELATION TO ONE ANOTHER) FROM THE DRUM BEFORE THE LAYER OF RESIN HAS BEEN CARRIED ON THE DRUM A DISTANCE CORRESPONDING TO A COMPLETE REVOLUTION OF 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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |