US3847530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved extrusion die plate
Assignee: Mallay Corp
•
Filing: 1973-07-19
•
Granted: 1974-11-12
•
Expires: 1993-07-19
Abstract
Abstract An improved extrusion die plate including a die plate discharge face having nozzle portions, radially directed, wear-resistant strips and a facing material cooperating to provide a planar discharge surface.
Inventors
- 👤 W Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:17
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/03; B29C48/05; B29C48/30; B29C48/345; B29C48/80; B29C48/83; B29C48/832; B29C48/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
An extrusion die plate for use in a pelletizing machine for extruding flowable material outwardly where such extruded material is sectioned by rotating knife blades, comprising: a die plate body having sets of extrusion passageways angularly spaced about said die plate body for passing such flowable material outwardly into engagement with the rotating knife blades; said die plate body including a die plate face on the discharge side thereof; said extrusion passageways extending through said die plate body and terminating in nozzle portions protruding from said die plate face such that said die plate face is recessed around said nozzle portions; a facing material of greater hardness than said die plate body being positioned on said die plate face; and strips of wear-resistant material mounted with said die plate face between said sets of passageways for increasing the operating life of said extrusion die plate.
Claim 2
Dependent Claim
145 words
An extrusion die plate for use in a pelletizing machine for extruding flowable material outwardly where such extruded material is sectioned by rotating knife blades, comprising: a die plate body having sets of extrusion passageways angularly spaced about said die plate body for passing such flowable material outwardly into engagement with the rotating knife blades; said die plate body including a die plate face on the discharge side thereof; said extrusion passageways extending through said die plate body and terminating in nozzle portions protruding from said die plate face such that said die plate face is recessed around said nozzle portions; a facing material of greater hardness than said die plate body being positioned on said die plate face; and strips of wear-resistant material mounted with said die plate face between said sets of passageways for increasing the operating life of said extrusion die plate.
Claim 3
Dependent Claim
19 words
The structure set forth in claim 1, wherein: said passageways in said sets of extrusion passageways are radially aligned.
Claim 4
Dependent Claim
21 words
The structure set forth in claim 2, including: said strips of wear-resistant material being radially positioned between said radially aligned passageways.
Claim 5
Dependent Claim
17 words
The structure set forth in claim 1, including: said facing material being positioned about said wear-resistant strips.
Claim 6
Dependent Claim
23 words
The structure set forth in claim 4, including: said facing material being positioned about both sides and both ends of said wear-resistant strips.
Claim 7
Dependent Claim
29 words
The structure set forth in claim 1, wherein: said nozzle portions, said facing material and said wear-resistant strips cooperate to provide a plane of discharge for said extruded material.
Claim 8
Dependent Claim
31 words
The structure set forth in claim 1, including: said die plate having radially directed grooves in said die plate face; and said wear-resistant strips are mounted in said radially directed grooves.
Claim 9
Dependent Claim
27 words
The structure set forth in claim 2, wherein: the length of said wear-resistant strips is greater than the length of said sets of radially aligned extrusion passageways.
Claim 10
Dependent Claim
41 words
The structure set forth in claim 1, wherein: said wear-resistant material mounted in said die face cooperates with said facing material to provide means for minimizing stresses acting on said facing material thereby increasing the working life of said die plate.
Claim 11
Dependent Claim
34 words
The structure set forth in claim 1, wherein: said wear-resistant material mounted in said die plate face provides means for at least partly preventing the transfer of stress exerted by said die plate body.
Claim 12
Dependent Claim
23 words
The structure set forth in claim 3, including: said strips of wear-resistant material extend radially inwardly and outwardly of said extrusion passageways sets.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |