US3038832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the production of fiber reinforced resin tubes
Assignee: Hoganas Plastprodukter AB
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Filing: 1959-11-03
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Granted: 1962-06-12
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Expires: 1979-11-03
Abstract
No abstract record available.
Inventors
- 👤 Carlson Karl Gustav Einar
- 👤 Rydell Rolf Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:44
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/84; B29C53/845; B29C53/56; B29C53/58; B29C53/581; B29C53/60; B29C53/607; B29C53/62; B29L; B29L2009/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
A METHOD OF CONTINUOUSLY FORMING A FIBER-REINFORCED RESIN TUBE WHICH COMPRISES CONTINUOUSLY ROTATING A SUBSTANTIALLY CYLINDRICAL MANDREL IN A FIXED LOCATION, CONTINUOUSLY FORMING A TUBE ADJACENT ONE END OF SAID MANDREL, CONTINUOUSLY MOVING SAID TUBE AS IT IS FORMED ALONG SAID MANDREL THROUGH A SETTING XONE AND CONTINUOUSLY REMOVING SAID TUBE FROM THE OTHER END OF SAID MANDREL AT THE SAME RATE AS IT IS FORMED, SAID TUBE BEING FORMED BY CONTINUOULY DELIVERING A STRIP OF A THIN FOIL OF A CELLULOSE DERIVATIVE TO SAID MANDREL AT A FIXED LOCTION ADJACENT SAID ONE END THEREOF WHEREBY SAID STRIP IS WOUND HELICALLY AROUND SAID MANDREL WITH THE EDGES OF SUCCESSIVE TURNS THEREOF OVERLAPPING AND FORMING A CONTINUOUSLY LAYER OF SAID FILM ON SAID MANDREL, SIMILARLY CONTINUOUSLY DELIVERING A STRIP OF REINFORCEMENT FIBROUS WEB TO SAID MANDREL AT A FIXED LOCATION FUTHER REMOVED FROM SAID ONE END OF SAID MANDREL THAN THE FIXED LOCATION AT WHICH SAID STRIP OF FILM IS DELIVERED THERETO, THEREBY FORMING A CONTINUOUS LAYER OF WEB OVER SAID CONTINUOUS FILM AND IMPREGNATING SAID LAYER OF WEB WITH A SETTABLE RESIN IN LIQUID FORM BEFORE SAID TUBE REACHES SAID SETTING ZONE, SAID TUBE BEING REMOVED FROM SAID MANDREL WHILE BOTH THE TUBE AND MANDREL ARE ROTATING BY ENGAGING AND PULLING ONLY THE FREE END OF SAID TUBE.
Claim 2
Independent Claim
218 words
A METHOD OF CONTINUOUSLY FORMING A FIBER-REINFORCED RESIN TUBE WHICH COMPRISES CONTINUOUSLY ROTATING A SUBSTANTIALLY CYLINDRICAL MANDREL IN A FIXED LOCATION, CONTINUOUSLY FORMING A TUBE ADJACENT ONE END OF SAID MANDREL, CONTINUOUSLY MOVING SAID TUBE AS IT IS FORMED ALONG SAID MANDREL THROUGH A SETTING XONE AND CONTINUOUSLY REMOVING SAID TUBE FROM THE OTHER END OF SAID MANDREL AT THE SAME RATE AS IT IS FORMED, SAID TUBE BEING FORMED BY CONTINUOULY DELIVERING A STRIP OF A THIN FOIL OF A CELLULOSE DERIVATIVE TO SAID MANDREL AT A FIXED LOCTION ADJACENT SAID ONE END THEREOF WHEREBY SAID STRIP IS WOUND HELICALLY AROUND SAID MANDREL WITH THE EDGES OF SUCCESSIVE TURNS THEREOF OVERLAPPING AND FORMING A CONTINUOUSLY LAYER OF SAID FILM ON SAID MANDREL, SIMILARLY CONTINUOUSLY DELIVERING A STRIP OF REINFORCEMENT FIBROUS WEB TO SAID MANDREL AT A FIXED LOCATION FUTHER REMOVED FROM SAID ONE END OF SAID MANDREL THAN THE FIXED LOCATION AT WHICH SAID STRIP OF FILM IS DELIVERED THERETO, THEREBY FORMING A CONTINUOUS LAYER OF WEB OVER SAID CONTINUOUS FILM AND IMPREGNATING SAID LAYER OF WEB WITH A SETTABLE RESIN IN LIQUID FORM BEFORE SAID TUBE REACHES SAID SETTING ZONE, SAID TUBE BEING REMOVED FROM SAID MANDREL WHILE BOTH THE TUBE AND MANDREL ARE ROTATING BY ENGAGING AND PULLING ONLY THE FREE END OF SAID TUBE.
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) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |