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Class Information
Number: 366/156.2
Name: Agitating > Having specified feed means > Agitation of material in feeder or supply reservoir > Rotatable impeller > Screw conveyor > Plural screw feeders
Description: Subject matter wherein there is more than one rotatable impeller structure having a continuous helical blade which rotates about its longitudinal axis in the feed means.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8322272 Method for positive feeding of preconditioned material into a twin screw extruder Dec. 4, 2012
8322907 Process and apparatus for continuously producing an elastomeric composition Dec. 4, 2012
8206027 Use of an apparatus for adding at least one additive to a reactor interior Jun. 26, 2012
7842221 Process and apparatus for the production of filled thermoplastic polymers Nov. 30, 2010
7028932 Machine for mixing and distributing products used to feed livestock Apr. 18, 2006
6994464 Control system and method for continuous mixing of slurry with removal of entrained bubbles Feb. 7, 2006
6979116 Apparatus for injecting dry bulk amendments for water and soil treatment Dec. 27, 2005
6616320 Combined blending and pumping apparatus Sep. 9, 2003
6588928 System for mixing product streams including a combined preblender and pumping device Jul. 8, 2003
6520671 Rotatable hopper having twin screws Feb. 18, 2003
6267495 Blender apparatus with precision low-rate metering unit Jul. 31, 2001
6203185 Feed mixer having third auger and method for using Mar. 20, 2001
5967655 System for mixing cementing material and mineral aggregate Oct. 19, 1999
5951159 Satellite extruder arrangement and method for the addition of an additive in a polymer melt within a dynamic mixer Sep. 14, 1999
5913602 On-the-go mixing system Jun. 22, 1999
5873654 Twin screw extruder type batch mixers Feb. 23, 1999
5558433 Conical tiltable auger apparatus for continuously feeding extrusion and/or rolling machines with viscous material. Sep. 24, 1996
5556196 Cement charging, mixing and pouring apparatus attached on a heavy duty machine Sep. 17, 1996
5547276 Method and apparatus for continuously dispersing fine particle-sized solids in a liquid Aug. 20, 1996
5527107 Plant for continuous mixing and homgenization Jun. 18, 1996
5524796 Screw feeder with multiple concentric flights Jun. 11, 1996
5471917 Apparatus for treating ground roasted coffee Dec. 5, 1995
5458415 Apparatus for making bread Oct. 17, 1995
5433520 Method and apparatus for continuously processing particulate cementitious material and fly ash solids and mixing them with a liquid to provide a liquid slurry of consistent proportions Jul. 18, 1995
5409605 Apparatus and method for treating waste sludge Apr. 25, 1995
5401402 Process and apparatus for treating sewage sludge Mar. 28, 1995
5381837 Mixing apparatus for powder materials Jan. 17, 1995
5375925 Material blender mixer and method therefor Dec. 27, 1994
RE34776 Programmable apparatus and method for delivering microingredient feed additives to animals by weight Nov. 8, 1994
5352035 Concrete mixing system with cement/water premixer Oct. 4, 1994
5333762 Screw feeder with progressively decreasing screw confinement Aug. 2, 1994
5245548 Grain cargo automatic metering and dispensing system Sep. 14, 1993
5240324 Continuous flow system for mixing and processing bulk ingredients Aug. 31, 1993
5213414 Mixing apparatus May. 25, 1993
5005980 Sludge/soil mixing machine Apr. 9, 1991
4961887 Batch control system and process for insulating a metallic rod Oct. 9, 1990
4889433 Programmable apparatus and method for delivering microingredient feed additives to animals by weight Dec. 26, 1989
4830508 Controlling method and a measuring mixer for liquids and powders May. 16, 1989
4815042 Programmable apparatus and method for delivering microingredient feed additives to animals by weight Mar. 21, 1989
4801210 Method and apparatus for continuous mixing of small, precise quantities of bulk materials with a liquid stream Jan. 31, 1989
4795264 Arrangement for concrete production in tunnels Jan. 3, 1989
4733971 Programmable weight sensitive microingredient feed additive delivery system and method Mar. 29, 1988
4607957 Plant for the continuous preparation of floated fodder Aug. 26, 1986
4565510 Double extruder for the production of a two-layer tubular extruded product Jan. 21, 1986
4561781 Agricultural feed blending apparatus Dec. 31, 1985
4548507 Mixing apparatus for the production of mixtures Oct. 22, 1985
4544279 Apparatus for mixing and proportioning several mixing components Oct. 1, 1985
4518262 Mixer for continuously mixing granular to powdery materials May. 21, 1985
4504151 Apparatus for the treatment of waste sludge Mar. 12, 1985
4498783 Process for mixing and proportioning several mixing components Feb. 12, 1985

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