Patent US2679469A successfully refreshed from Google Patents.
US2679469A
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Method of welding polyethylene and like plastic materials
Assignee: CIBA PHARM PROD Inc
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Filing: 1951-04-02
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Granted: 1954-05-25
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Expires: 1971-04-02
Abstract
No abstract record available.
Inventors
- 👤 John G Bedford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/24; B29; B29C; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1448; B29C65/18; B29C65/24; B29C65/26; B29C66/00; B29C66/01; B29C66/03; B29C66/032; B29C66/0324; B29C66/03241; B29C66/034; B29C66/0342; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/137; B29C66/32; B29C66/326; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/43123; B29C66/70; B29C66/71; B29C66/73; B29C66/731; B29C66/7311; B29C66/73113; B29C66/73115; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81425; B29C66/82; B29C66/822; B29C66/8221; B29C66/8226; B29C66/82265; B29C66/8227; B29C66/83; B29C66/832; B29C66/8324; B65B7/00; B65B7/14; B29C65/1403; B29C65/1412; B29C66/7314; B29C66/73143; B29C66/90; B29C66/91; B29C66/919; B29C66/96; B29C66/964; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29L; B29L2023/00; B29L2023/20; Y; Y10; Y10S; Y10S425/00; Y10S425/041; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD OF WELDING TOGETHER THE MARGINAL PORTIONS OF LAMINAE OF A PLASTIC MATERIAL HAVING A RELATIVELY SHARP MELTING POINT AND LOW HEAT CONDUCTIVITY, WHICH COMPRISES PLACING BETWEEN TEMPERATURE-CONTROLLED PLATENS THE MARGINAL PORTIONS FACE TO FACE WITH THEIR FREE EDGES UPPERMOST AND A SPACE BETWEEN THEIR INNER SURFACES CAPABLE OF BEING BRIDGED UPON MELTING OF THE MARGINAL PORTIONS, DIRECTING RADIANT HEAT DOWNWARDLY ON TO THE MARGINAL PORTIONS TO CAUSE A MOLTEN BEAD TO BUILD UP ALONG EACH PORTION UNTIL THE BEADS UNITE TO BRIDGE THE SPACE BETWEEN THOSE PORTIONS, AND CONTROLLING THE TEMPERATURE OF THE PLATEN SURFACES AND THEIR PROXIMITY TO THE OUTER SURFACES OF THE MARGINAL PORTIONS TO RETARD THE RATE OF COOLING SO AS TO PERMIT THE REGION OF FUSION TO EXTEND LATERALLY ON EACH SIDES OF THE INITIAL MOLTEN BRIDGE BEFORE THE JOINT SOLIDIFIES.
Claim 2
Independent Claim
137 words
A METHOD OF WELDING TOGETHER THE MARGINAL PORTIONS OF LAMINAE OF A PLASTIC MATERIAL HAVING A RELATIVELY SHARP MELTING POINT AND LOW HEAT CONDUCTIVITY, WHICH COMPRISES PLACING BETWEEN TEMPERATURE-CONTROLLED PLATENS THE MARGINAL PORTIONS FACE TO FACE WITH THEIR FREE EDGES UPPERMOST AND A SPACE BETWEEN THEIR INNER SURFACES CAPABLE OF BEING BRIDGED UPON MELTING OF THE MARGINAL PORTIONS, DIRECTING RADIANT HEAT DOWNWARDLY ON TO THE MARGINAL PORTIONS TO CAUSE A MOLTEN BEAD TO BUILD UP ALONG EACH PORTION UNTIL THE BEADS UNITE TO BRIDGE THE SPACE BETWEEN THOSE PORTIONS, AND CONTROLLING THE TEMPERATURE OF THE PLATEN SURFACES AND THEIR PROXIMITY TO THE OUTER SURFACES OF THE MARGINAL PORTIONS TO RETARD THE RATE OF COOLING SO AS TO PERMIT THE REGION OF FUSION TO EXTEND LATERALLY ON EACH SIDES OF THE INITIAL MOLTEN BRIDGE BEFORE THE JOINT SOLIDIFIES.
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |