US3642406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing, extruding, and severing apparatus
Assignee: Baker Perkins Inc
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Filing: 1971-01-07
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Granted: 1972-02-15
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Expires: 1991-01-07
Abstract
Abstract A mixer and extruder of the type employing a reciprocating and revolving material advancing shaft in a mixing chamber has a die mounted on its front end for reciprocation and rotation with the shaft, there being generally radially extending extrusion ports provided in the die and a cutter for severing the material extruded in strands radially from the die.
Inventors
- 👤 Henry F Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:35
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/345; B29C48/05; B29C48/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
In a mixer and extruder: a barrel having a chamber; means for supplying material to be mixed and extruded to said chamber; a shaft in said chamber with material advancing means thereon for advancing material toward one end of said chamber; means for revolving and reciprocating said shaft to mix and advance the material; a die assembly mounted on the front end of said shaft for reciprocation therewith and having generally radially extending extrusion die port means through which said material is extruded, said die assembly including a rearwardly extending sleeve spaced radially from said shaft to define material issuing passage means therebetween leading to said port means; and cutting means radially exteriorly adjacent said port means for cutting off lengths of material extruded through said port means.
Claim 2
Dependent Claim
128 words
In a mixer and extruder: a barrel having a chamber; means for supplying material to be mixed and extruded to said chamber; a shaft in said chamber with material advancing means thereon for advancing material toward one end of said chamber; means for revolving and reciprocating said shaft to mix and advance the material; a die assembly mounted on the front end of said shaft for reciprocation therewith and having generally radially extending extrusion die port means through which said material is extruded, said die assembly including a rearwardly extending sleeve spaced radially from said shaft to define material issuing passage means therebetween leading to said port means; and cutting means radially exteriorly adjacent said port means for cutting off lengths of material extruded through said port means.
Claim 3
Dependent Claim
22 words
The combination defined in claim 1 in which a screen member having radially disposed openings is provided within said die port means.
Claim 4
Dependent Claim
77 words
The combination defined in claim 2 in which said die assembly includes: a die plate with a series of circumferentially spaced apart discharge ports in said plate and an annular recess in the rear face of said plate leading to said ports, forming said port means; and a die holder, from which said sleeve extends rearwardly, having a front plate portion covering said recess; said front plate portion being axially ported to communicate said recess and sleeve.
Claim 5
Dependent Claim
33 words
The combination defined in claim 1 in which said die assembly is forward of said chamber throughout its stroke and said sleeve moves axially in and seals the front end of said chamber.
Claim 6
Dependent Claim
17 words
The combination defined in claim 2 in which said screen member comprises an axially extending screen pack.
Claim 7
Dependent Claim
37 words
The combination defined in claim 5 in which said screen pack comprises an upstream support with radial ports therethrough, and a plurality of downstream screens are provided, fixed on said pack and covering said latter mentioned ports.
Claim 8
Dependent Claim
30 words
The combination defined in claim 6 in which said die port means downstream of said screen pack support comprises a convergent annular portion leading to circumferentially spaced cylindrical discharge ports.
Claim 9
Dependent Claim
37 words
The combination defined in claim 3 in which said shaft is provided with a reduced diameter front end portion relative to said sleeve to define a material channeling passage therebetween, and said die holder is fixed thereto.
Claim 10
Dependent Claim
42 words
The combination defined in claim 8 in which said die plate is releasably secured to said die holder front plate and a screen pack is trapped therebetween which can be readily changed by simply removing the die plate from the die holder.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |