US3837783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: Corning Glass Works
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Filing: 1973-11-14
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Granted: 1974-09-24
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Expires: 1993-11-14
Abstract
Abstract A die for extruding a matrix with essentially circumferential walls is formed by helically winding a slotted and grooved strip of material about a central hub, and bonding or otherwise joining the thus-wound strip material together as an integral body. The strip material is provided with a longitudinal groove and a plurality of transverse slots communicating with such groove which combine to form discharge outlets for extruding thinwalled, small cell sized matrices.
Inventors
- 👤 R Bagley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/20; B28B3/26; B28B3/269; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/11; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/07; B29C48/12; B29C48/13; B29L; B29L2031/00; B29L2031/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
An improved die structure for extruding a honeycomb matrix with essentially circumferential walls comprising, a substantially cylindrical die body having a central hub portion extending between an inlet face and an outlet face of said die body, said outlet face having a plurality of radially spaced apart curved open portions connected together by a plurality of discontinuous radially extending slots, and a plurality of feed channels communicating between said inlet face and said curved open portions for feeding extrudable material to a curved gridwork of discharge slots formed in said outlet face by said curved open portions and said radial slots.
Claim 2
Dependent Claim
101 words
An improved die structure for extruding a honeycomb matrix with essentially circumferential walls comprising, a substantially cylindrical die body having a central hub portion extending between an inlet face and an outlet face of said die body, said outlet face having a plurality of radially spaced apart curved open portions connected together by a plurality of discontinuous radially extending slots, and a plurality of feed channels communicating between said inlet face and said curved open portions for feeding extrudable material to a curved gridwork of discharge slots formed in said outlet face by said curved open portions and said radial slots.
Claim 3
Dependent Claim
49 words
An improved die as defined in claim 1 wherein said radially offset curved open portions are formed by a single continuous spirally extending discharge slot formed in the outlet face of said die body, and said radially extending discharge slots extend between adjacently wound portions of said spiral slot.
Claim 4
Dependent Claim
33 words
A die structure as defined in claim 1 wherein said feed channels are contoured adjacent their communication with said discharge slots so as to facilitate the flow of extrudable material within such slots.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |