US3836302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face plate ring assembly for an extrusion die
Assignee: Corning Glass Works
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Filing: 1972-03-31
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Granted: 1974-09-17
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Expires: 1992-03-31
Abstract
Abstract A mask or face plate, having an orifice or opening formed therethrough of desired size and configuration, is positioned against the discharge face of an extrusion die. The mask restricts the flow of extrudable material through the die so that such material will conform to the size and configuration of the opening or orifice provided in such mask or face plate. The mask or face plate is preferably part of a ring assembly which may be removably attached to the extrusion die structure. When such die is provided with a plurality of core pins for forming cellular or honeycomb structures, the orifice formed in the face plate is preferably provided with a tapered inlet opening in communication with the discharge face of such die, so as to partially collapse the peripheral cells engaging the tapered surface as they are moved radially inwardly by such surface, and thereby form an integral skin or sheath about the remainder of the honeycomb structure as it is being extruded.
Inventors
- 👤 R Kaukeinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
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; B29C48/345; C; C03; C03B; C03B17/00; C03B17/04; B29C48/07; B29L; B29L2031/00; B29L2031/60; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
In combination with extrusion die means for forming honeycomb structures having an inlet face provided with a plurality of separate feed passageways and an outlet face provided with a gridwork of interconnected discharge slots communicating with said feed passageways, the improvement comprising a face plate ring assembly including a face plate and means releasably retaining said face plate in direct communication with the outlet face of said extrusion die means, said face plate including an orifice extending longitudinally therethrough, blocking surface means surrounding an inlet portion of said orifice in abutting relationship with portions of the outlet face of said extrusion die means for blocking-off the flow of extrudable material through peripheral portions of said die means, said orifice having a tapered inlet portion in communication with the ouTlet face of said die means and an outlet portion extending through the remainder of said face plate, and said tapered inlet portion providing means for radially moving peripherally edge portions of extruded material contacting said tapered inlet portion radially inwardly to form a skin about the remainder of the honeycomb structure being extruded through said orifice.
Claim 2
Dependent Claim
185 words
In combination with extrusion die means for forming honeycomb structures having an inlet face provided with a plurality of separate feed passageways and an outlet face provided with a gridwork of interconnected discharge slots communicating with said feed passageways, the improvement comprising a face plate ring assembly including a face plate and means releasably retaining said face plate in direct communication with the outlet face of said extrusion die means, said face plate including an orifice extending longitudinally therethrough, blocking surface means surrounding an inlet portion of said orifice in abutting relationship with portions of the outlet face of said extrusion die means for blocking-off the flow of extrudable material through peripheral portions of said die means, said orifice having a tapered inlet portion in communication with the ouTlet face of said die means and an outlet portion extending through the remainder of said face plate, and said tapered inlet portion providing means for radially moving peripherally edge portions of extruded material contacting said tapered inlet portion radially inwardly to form a skin about the remainder of the honeycomb structure being extruded through said orifice.
Claim 3
Dependent Claim
61 words
A face plate assembly as defined in claim 1 wherein said tapered wall means is provided with a taper of between about 5* and 60* with respect to the axis of extrusion, and said inlet portion is provided with an entry zone between said tapered wall means and said blocking surface means which is substantially parallel to said axis of extrusion.
Claim 4
Dependent Claim
75 words
A face plate ring assembly as defined in claim 1 wherein said outlet portion is substantially parallel to the axis of extrusion through said orifice, said tapered inlet portion is provided with a taper between about 5* and 60* with a longitudinal axis extending therethrough, and said tapered inlet end portion is provided with a straight entry zone adjacent said outlet face which extends longitudinally along a portion of said orifice from said blocking surface.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |