US2714571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding a polyethylene film to a fibrous web
Assignee: Dobeckmun Co
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Filing: 1952-04-08
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Granted: 1955-08-02
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Expires: 1972-04-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Irion
- 👤 Karl E Prindle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
B; B32; B32B; B32B27/00; D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0088; D21; D21H; D21H27/00; D21H27/30; D21H27/32; D21H27/34; D21H27/36; Y; Y10; Y10S; Y10S116/00; Y10S116/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
THE PROCESS FOR BONDING A POLYETHYLENE FILM TO A FIBROUS WEB WHICH COMPRISES THE STEPS OF EXTRUDING A FILM OF MOLTEN POLYETHYLENE ONTO A FIBROUS WEB, PRESSING SAID FILM INTO SAID WEB BY URGING SAID FIBROUS WEB AGAINST A ROLL WITH SAID FILM BETWEEN SAID FIBROUS WEB AND SAID ROLL, COOLING SAID FILM AT LEAST TO A TEMPERATURE AT WHICH IT IS NON-TACKY WITH RESPECT TO THE SURFACE OF SAID ROLL TO ESTABLISH A PRELIMINARY RELATIVELY WEAK BOND BETWEEN SAID FILM AND SAID FIBROUS WEB, REMOVING SAID FILM FROM THE SURFACE OF SAID ROLL, REHEATING SAIF FILM TO AT LEAST 225* F. AND THEREUPON RECOOLING SAID FILM TO SUBSTANTIALLY NORMAL ENVIRONMENTAL TEMPERATURE TO FINALLY ESTABLISH A STRONG BOND BETWEEN SAID FILM AND SAID WEB.
Claim 2
Dependent Claim
124 words
THE PROCESS FOR BONDING A POLYETHYLENE FILM TO A FIBROUS WEB WHICH COMPRISES THE STEPS OF EXTRUDING A FILM OF MOLTEN POLYETHYLENE ONTO A FIBROUS WEB, PRESSING SAID FILM INTO SAID WEB BY URGING SAID FIBROUS WEB AGAINST A ROLL WITH SAID FILM BETWEEN SAID FIBROUS WEB AND SAID ROLL, COOLING SAID FILM AT LEAST TO A TEMPERATURE AT WHICH IT IS NON-TACKY WITH RESPECT TO THE SURFACE OF SAID ROLL TO ESTABLISH A PRELIMINARY RELATIVELY WEAK BOND BETWEEN SAID FILM AND SAID FIBROUS WEB, REMOVING SAID FILM FROM THE SURFACE OF SAID ROLL, REHEATING SAIF FILM TO AT LEAST 225* F. AND THEREUPON RECOOLING SAID FILM TO SUBSTANTIALLY NORMAL ENVIRONMENTAL TEMPERATURE TO FINALLY ESTABLISH A STRONG BOND BETWEEN SAID FILM AND SAID WEB.
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) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |