Patent US5189092A successfully refreshed from Google Patents.
US5189092A
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Method and apparatus for the continuous extrusion of solid articles
Assignee: Koslow Technologies Corp
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Filing: 1991-04-08
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Granted: 1993-02-23
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Expires: 2011-04-08
Abstract
Abstract A method and apparatus for the continuous extrusion of composite solid articles from feed mixtures comprising a substantially uniform mixture of particulate binder material and particulate primary material in which the feed mixture is forced through an extrusion die of substantially uniform cross-section and subject to heat, pressure and cooling which consolidates the feed mixture whereby it emerges from the die as a solid composite article and in which the pressure in the extrusion die is supplied by back-pressuring means external of the die. Solid filter elements of activated carbon particles for a wide variety of filtering applications may be formed using the process and apparatus.
Inventors
- 👤 Evan E. Koslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:10
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2055; B01D39/2058; B01D39/2062; B01D39/16; B01D39/1638; B01D39/1653; B01D39/1661; B01J; B01J20/00; B01J20/02; B01J20/20; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/09; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/903; B29C48/92; C; C04; C04B; C04B38/00; B01D2239/00; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1241; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C48/885; B29C48/911; B29C48/9115; B29C48/912; B29C48/9135
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
226 words
A method of extruding a solid composite material which comprises: providing a quantity of first particles of a binder material, said first particles having diameters between about 0.1 and about 250 micrometers; providing a quantity of second particles of a primary material having a softening temperature substantially greater than the softening temperature of said binder material, said second particles having diameters between about 0.1 and about 3,000 micrometers; combining the first and second quantities of particles in a substantially uniform mixture wherein said binder material is present in a amount of at least about 3% by weight of the mixture; extruding said substantially uniform mixture from an extruder barrel into a die of substantially uniform cross-section which cross-section is not substantially smaller than the cross-section of the inside diameter of the extruder barrel; heating said substantially uniform mixture within said die to a temperature substantially above the softening temperature of said binder material but to a temperature less than the softening temperature of said primary material; applying sufficient back pressure, from without said die, to the heated mixture within said die to convert said heated mixture into a substantially homogeneous composite material; rapidly cooling said composite material to below the softening point of the binder material to produce the composite material; and extruding said composite material from said die as an extruded solid composite material product.
Claim 2
Independent Claim
226 words
A method of extruding a solid composite material which comprises: providing a quantity of first particles of a binder material, said first particles having diameters between about 0.1 and about 250 micrometers; providing a quantity of second particles of a primary material having a softening temperature substantially greater than the softening temperature of said binder material, said second particles having diameters between about 0.1 and about 3,000 micrometers; combining the first and second quantities of particles in a substantially uniform mixture wherein said binder material is present in a amount of at least about 3% by weight of the mixture; extruding said substantially uniform mixture from an extruder barrel into a die of substantially uniform cross-section which cross-section is not substantially smaller than the cross-section of the inside diameter of the extruder barrel; heating said substantially uniform mixture within said die to a temperature substantially above the softening temperature of said binder material but to a temperature less than the softening temperature of said primary material; applying sufficient back pressure, from without said die, to the heated mixture within said die to convert said heated mixture into a substantially homogeneous composite material; rapidly cooling said composite material to below the softening point of the binder material to produce the composite material; and extruding said composite material from said die as an extruded solid composite material product.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the back pressure is applied to the extruded solid composite material product.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein the back pressure applied to the heated mixture in the die cavity is a pressure of between about 5 to about 400 psi.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein the back pressure applied to the heated mixture in the die cavity has a pressure of between about 20 to about 400 psi.
Claim 6
Dependent Claim
28 words
The method of claim 2 wherein the substantially uniform mixture is heated to a temperature at least about 25° C. above the softening temperature of said binder material.
Claim 7
Dependent Claim
28 words
The method of claim 3 wherein the substantially uniform mixture is heated to a temperature at least about 25° C. above the softening temperature of said binder material.
Claim 8
Dependent Claim
87 words
The method of claim 1 wherein the substantially uniform mixture comprises: a) about 50% to about 70% by weight activated carbon particles; b) about 27.5% to about 37.5% by weight lubricating oil; c) about 4.0% to about 22.5% by weight binder particles having diameter of from about 0.1 to about 250 micrometers and optionally d) up to about 3% by weight solid state lubricant, and wherein said activated carbon particles have a softening temperature at least about 25° C. above the softening temperature of the binder particles.
Claim 9
Dependent Claim
53 words
The method of claim 7 wherein the substantially uniform mixture comprises: a) about 58% by weight of activated carbon particle of mesh size about 12×40; b) about 35% by weight of lubricating oil; c) about 5% by weight nylon binder particles of about -60 mesh, and d) about 2% by weight sodium stearate.
Claim 10
Dependent Claim
84 words
The method of claim 1 wherein the substantially uniform mixture comprises: a) about 50 to about 60% by weight activated carbon particles; b) about 27.5% to about 37.5% by weight micronized manganese dioxide particles of at least about -100 mesh size, and c) about 12.5% to about 22.5% by weight binder particles having diameters between about 0.1 and about 250 micrometers, and wherein said activated carbon particles have a softening temperature at least about 25° C. above the softening temperature of the binder particles.
Claim 11
Dependent Claim
67 words
The method of claim 9 wherein the substantially uniform mixture comprises: a) about 55% by weight activated carbon particles of a mesh size of about 50×200; b) about 30% by weight of micronized manganese dioxide; and c) about 15% by weight polyethylene binder particles; and wherein said activated carbon particles have a softening temperature at least about 25° C. above the softening temperature of the binder particles.
Claim 12
Dependent Claim
65 words
The method of claim 1 wherein the substantially uniform mixture comprises: a) about 80% to about 88.5% by weight activated carbon particles; and b) about 12.5% to about 20% by weight binder particles having diameters between about 0.1 and about 250 micrometers, and wherein said activated carbon particles have a softening temperature at least about 25° C. above the softening temperature of the binder particles.
Claim 13
Dependent Claim
40 words
The method of claim 11 wherein the substantially uniform mixture comprises: a) about 65% by weight 20×50 mesh activated carbon particles and about 20% by weight 80×325 mesh activated carbon particles, and b) about 15% by weight polyethylene binder particles.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
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