US3672641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing liquids from elastomeric polymers
Assignee: French Oil Mill Machinery Co
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Filing: 1970-09-14
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Granted: 1972-06-27
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Expires: 1990-09-14
Abstract
Abstract A continuous process and apparatus for removing liquids and/or vapors from elastomeric polymers causes the liquid containing polymer to undergo mechanical working and then a substantial reduction in pressure while contained within a chamber having small vents to atmosphere or a collection housing. Essentially all of the last traces of liquids or vapors are removed in this chamber, the material is cooled by the vaporization of contained liquids, any resulting fine particles are contained and immediately mixed into the material, and the material is subsequently discharged through an extruder section without further significant creating of fine particles in the end product as discharged.
Inventors
- 👤 Robert Kent Slaby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:33
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/12; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/761; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92571; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C48/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
242 words
In a mechanical screw press for expressing liquid from an elastomeric material and including a cage having means defining an elongated pressing section with an inlet end and a discharge end, means forming fluid vent openings extending through at least portions of said pressing section, a closed extruder section receiving the material from the discharge end of said pressing section and having a discharge opening from the cage, a rotatable screw assembly extending through said cage and including a series of longitudinally spaced spiral flights separated by collars, means for rotating said screw assembly, means for progressively compressing material within said pressing section as it moves toward said discharge end and then through said extruder section in response to rotation of said screw, and breaker bar means supported by said cage and including portions projecting into said pressing section between said flights to resist rotation of the material with said flights as the material is being compressed over said collars, the improvement comprising a ring member mounted upstream of the discharge end of said pressing section adjacent one of said collars and cooperating with said one collar to define a restricting orifice, and means forming an expansion chamber within said pressing section between said restricting orifice and said discharge end of said pressing section, said expansion chamber having fluid vent openings therein whereby the liquid content of the material is significantly reduced by flashing from the material prior to said extruder section.
Claim 2
Dependent Claim
242 words
In a mechanical screw press for expressing liquid from an elastomeric material and including a cage having means defining an elongated pressing section with an inlet end and a discharge end, means forming fluid vent openings extending through at least portions of said pressing section, a closed extruder section receiving the material from the discharge end of said pressing section and having a discharge opening from the cage, a rotatable screw assembly extending through said cage and including a series of longitudinally spaced spiral flights separated by collars, means for rotating said screw assembly, means for progressively compressing material within said pressing section as it moves toward said discharge end and then through said extruder section in response to rotation of said screw, and breaker bar means supported by said cage and including portions projecting into said pressing section between said flights to resist rotation of the material with said flights as the material is being compressed over said collars, the improvement comprising a ring member mounted upstream of the discharge end of said pressing section adjacent one of said collars and cooperating with said one collar to define a restricting orifice, and means forming an expansion chamber within said pressing section between said restricting orifice and said discharge end of said pressing section, said expansion chamber having fluid vent openings therein whereby the liquid content of the material is significantly reduced by flashing from the material prior to said extruder section.
Claim 3
Dependent Claim
30 words
A press as defined in claim 1, including means for varying the area of said restricting orifice to achieve optimum liquid removal and temperature reduction ahead of said extruder section.
Claim 4
Dependent Claim
19 words
A press as defined in claim 1, including a die mounted at said discharge opening of said extruder section.
Claim 5
Dependent Claim
30 words
Apparatus as defined in claim 1, including vent openings upstream of said restricting orifice for initial flashing and/or draining of liquid from the material as it is initially being worked.
Claim 6
Dependent Claim
221 words
In a mechanical screw press for expressing liquid from an elastomeric material and including a cage having means defining an elongated pressing section with an inlet end and a discharge end, means forming fluid vent openings extending through a major portion of said pressing section, a closed extruder section receiving the material from the discharge end of said pressing section and having a discharge opening from the cage, a rotatable screw assembly extending through said cage and including a series of longitudinally spaced spiral flights separated by collars, means for rotating said screw assembly, and breaker bar means supported by said cage and including portions projecting into said pressing section between said flights to resist rotation of the material with said flights as the material is being compressed over said collars; the improvement comprising an adjustable ring member mounted upstream of the discharge end of said pressing section surrounding one of said collars and cooperating with said one collar to define a restricting orifice, and means forming an expansion chamber within said pressing section between said restricting orifice and said discharge end of said pressing section, said expansion chamber having fluid vent openings therein of small cross-section to contain the material whereby the liquid content of the material is significantly reduced by flashing from the material prior to said extruder section.
Claim 7
Dependent Claim
221 words
In a mechanical screw press for expressing liquid from an elastomeric material and including a cage having means defining an elongated pressing section with an inlet end and a discharge end, means forming fluid vent openings extending through a major portion of said pressing section, a closed extruder section receiving the material from the discharge end of said pressing section and having a discharge opening from the cage, a rotatable screw assembly extending through said cage and including a series of longitudinally spaced spiral flights separated by collars, means for rotating said screw assembly, and breaker bar means supported by said cage and including portions projecting into said pressing section between said flights to resist rotation of the material with said flights as the material is being compressed over said collars; the improvement comprising an adjustable ring member mounted upstream of the discharge end of said pressing section surrounding one of said collars and cooperating with said one collar to define a restricting orifice, and means forming an expansion chamber within said pressing section between said restricting orifice and said discharge end of said pressing section, said expansion chamber having fluid vent openings therein of small cross-section to contain the material whereby the liquid content of the material is significantly reduced by flashing from the material prior to said extruder section.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |