Extrusion method for forming thinwalled honeycomb structures
Abstract
Abstract Method for forming thin-walled honeycomb structures is provided in the use of an extrusion die having an outlet face provided with a gridwork of interconnected discharge slots and an inlet face provided with a plurality of feed openings extending partially through said die in communication with said discharge slots. Extrudable material is fed to said die under pressure wherein the extrudable material flows longitudinally through the feed opening in the inlet face of the die and is directed thereby to the interconnected discharge slots communicating with the outlet face, wherein a portion of the material flows laterally within such slots to form a continuous mass before being discharged longitudinally therefor to thereby form a thin-walled structure having a multiplicity of open passages extending throughout. The longitudinally discharged mass is rigidified to prevent deformation of said passages.
Inventors
- 👤 R Bagley
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |