Patent US4163640A successfully refreshed from Google Patents.
US4163640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding a honeycomb structural body
Assignee: Institute of Technology Precision Electrical Discharge Works
•
Filing: 1978-05-30
•
Granted: 1979-08-07
•
Expires: 1998-05-30
Abstract
Abstract A die for extruding a honeycomb structural body capable of preventing the deformation of the honeycomb structural body when the honeycomb structural body is extruded.
Inventors
- 👤 Noboru Higuchi
- 👤 Shoji Futamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
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; B29L; B29L2031/00; B29L2031/60; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
In a die apparatus for extruding a honeycomb structural body comprising a second core block having discharge slits of a cross-sectional shape corresponding to the cross-section of the honeycomb, said slits having a given depth toward the rear surface of the die from the front surface of the die, and a first core block wherein a plurality of independent feed inlets are formed toward the front surface side of the die from the rear surface of the die and connect to the discharge slits, both said blocks being constituted integrally, an improvement comprising that the first core block being divided in the direction which cross-sects the feed inlets to provide a gas reservoir composed of a recess formed by remaining the periphery portion of a plurality of feed inlets, and gas discharge apertures opening at the front surface of the die and perforating the second block to flow gas from the gas reservoir through said gas discharge apertures.
Claim 2
Dependent Claim
158 words
In a die apparatus for extruding a honeycomb structural body comprising a second core block having discharge slits of a cross-sectional shape corresponding to the cross-section of the honeycomb, said slits having a given depth toward the rear surface of the die from the front surface of the die, and a first core block wherein a plurality of independent feed inlets are formed toward the front surface side of the die from the rear surface of the die and connect to the discharge slits, both said blocks being constituted integrally, an improvement comprising that the first core block being divided in the direction which cross-sects the feed inlets to provide a gas reservoir composed of a recess formed by remaining the periphery portion of a plurality of feed inlets, and gas discharge apertures opening at the front surface of the die and perforating the second block to flow gas from the gas reservoir through said gas discharge apertures.
Claim 3
Dependent Claim
36 words
The apparatus for extruding the honeycomb structural body as claimed in claim 1, wherein the gas reservoir connecting to the gas discharge apertures is supplied with gas from gas inlets provided on the first core block.
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) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |