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Class 209/270 - Drum


Subclass of Class 209 - Classifying, separating, and assorting solids
Definition: Means and methods wherein rotating cylindrical or drum sifters
No. of patents: 102
Last issue date: 06/03/2008


1      
NumberTitleIssue Date
7380671Process for size classifying ammonium sulfate crystals which are present in a suspension
The invention relates to a process for size classifying ammonium sulfate crystals using a screen, said process comprising feeding a feed suspension to the screen, said feed suspension comprising said ammonium sulfate crystals in an ammonium sulfate solution, size cl...
06/03/2008
7347163Microbial feedstock for filter feeding aquatic organisms
The present invention provides a method of cultivating filter feeders such as Artemia by substituting special microorganisms for naturally occurring microscopic algae, and providing conditions optimal for the growth of these organisms. These subsituted special micro...
03/25/2008
7293658Drum filter assembly
A drum filter assembly comprising a hollow drum filter having a longitudinal axis and an outer filter screen or mesh material, the drum filter being supported on external rollers for rotation about its longitudinal axis and an inlet for introducing liquid to be filt...
11/13/2007
7284665Method and apparatus for processing articles
Apparatus is described for processing articles. It has a hollow drum having permeable walls. At one end there is an inlet for receiving articles onto an inside surface of the permeable walls. At the other end is an outlet for discharging articles from the drum. The ...
10/23/2007
7229526Method and apparatus for the feeding of fibers
A system for feeding fibres from a fibre separation step at a first pressure to a drying step at a second, lower pressure, the system comprising a sluice feeder (3) provided between the fibre separation step and the drying step. At least an outlet (14)...
06/12/2007
7163106Strainer for cleaning fibrous suspensions
A strainer for fibrous suspensions, having a container, a filtering basket inside the container and a rotor inside the filtering basket coupled to motorization means suited to set it rotating. In the container there are a drain chamber of the rejected suspension, a ...
01/16/2007
7117995Concrete reclamation apparatus
An apparatus which is useful in the separation of solids from a diluted, wet, concrete mixture has (a) a free-standing first container with a drain port and a top opening, (b) a strainer disposed within the first container, (c) a drain port shut-off valve, (d) a sec...
10/10/2006
7097740Method and screen for screening at least two pulp mixtures
The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cyli...
08/29/2006
7093719Transportable, self-contained, recirculation, wash plant
A combination of prospecting equipment and apparatus, for the purpose of collecting precious minerals from mineral bearing sand and gravel, located in regions that are arid in nature, have little water or limited water usage, due to environmental concerns. The Wash ...
08/22/2006
7055697System for separating fluid-borne material from a fluid that carries particulate matter along with the material
A system for screening fluid-borne material from a fluid that carries particulate matter along with the material, e.g. for screening usable fibers in papermaking or tissue making white water that also contains waste material such as fines and ash. The system employs...
06/06/2006
6938846Screening apparatus with slot ring moveable in axial direction
Apparatus for screening pulp suspensions is provided, including a housing, a rotary screen within the housing, a screen chamber between the rotary screen and the housing, a reject outlet, an accept outlet, an outer screen surface defining the outer surface of the sc...
09/06/2005
6923329Screen apparatus
A screen apparatus includes a tank, a first cylidrical screen disposed inside the tank to form a first chamber, and a second cylidrical screen disposed outside the first cylindrical screen. The second cylindrical screen defines a second′ chamber facing the first c...
08/02/2005
6868973Drum type refining or washing apparatus
The present invention provides a drum type refining or washing apparatus in which the refining or washing efficiency of a pulp suspension or a food suspension is remarkably enhanced by the filtration function of a rotary drum and by the filtrate sucking force of a f...
03/22/2005
6786335Pyrolysis plant for refuse and method for screening solid residues
A pyrolysis plant for refuse and a method for screening solid residues provide a sure and trouble-free sieving of a solid material using a sieving device having a configuration which is as simple as possible. A spiral formed by a rod which is wound in a helicoidal m...
09/07/2004
6719145Arrangement and rotor for screening of pulp
An arrangement and a rotor for screening of pulp is disclosed that is suitable for the screening of chemical and mechanical pulps, i.e. fiber suspensions of the wood processing industry. A feature of the arrangement and rotor is that inside the rotor (16) the...
04/13/2004
6702120Screening apparatus including two screen means
Apparatus for separating a fiber suspension is provided including a housing with an upper chamber in the upper portion thereof, a rotor rotatably mounted in the housing, a first rotary screen mounted for rotation with the rotor and dividing the housing in...
03/09/2004
6631809Screen for cleaning a pulp suspension
A screen for cleaning a pulp suspension includes a stationary installation in the infeed area between the infeed branch and the free end of the rotor....
10/14/2003
6622868System for recovering and recycling usable fibers from white water in a papermaking process
A system for recovering and recirculating usable fibers contained in papermaking white water. The system employs a flexible and pliable screen to which the papermaking white water is applied. The screen is supported in a suspended manner from a frame. The...
09/23/2003
6446812Removal of elemental phosphorus from mixtures with other solids
Disclosed is a separator for separating a meltable solid from a mixture with other solids. The separator has a tank for holding a fluid; a container at least partially inside the tank, made at least in part of a screen through which the fluid can pass and...
09/10/2002
6261454Device for treating, in particular washing, gluten or the like
Device for washing gluten, provided with at least one drum screen rotatably supported on a corrosion-resistant shaft, and equipped with means for supplying and discharging washing water and also with means for supplying the material to be treated at the o...
07/17/2001
6244446Method and apparatus for continuously separating a more dense fraction from a less dense fraction of a pulp material
A method and centrifugal separator apparatus for separating more dense particles from less dense particles contained in a slurry. The separator apparatus receives slurry into a rotor assembly which includes a bowl open upwardly and a surrounding hutch cha...
06/12/2001
6227379Rotary separator apparatus and method
A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is support...
05/08/2001
6206199Method and an apparatus for recycling different components in a multiple layer material
In order to recover the various components of multiple layer materials, a method uses a refiner or disperser including mutually opposing rotating discs having material engaging surfaces or elements such as teeth. The method includes: adjusting a gap betwe...
03/27/2001
6171448Apparatus for screening waste paper pulp
A casing has a pulp slurry inlet, a reject outlet and an accept stock outlet and accommodates a rotor. The rotor has a hollow cylinder with scraper blades at its outer periphery. A screen plate is disposed outside of the scraper blades to provide between ...
01/09/2001
6155427Zoned pressure screen
Pressure screening apparatus for screening a suspension of papermaking stock employing an enclosing housing and a cylindrical screen, with a drum type rotor, has the screen divided or formed with axially spaced annular screening zones and a corresponding ...
12/05/2000
6109450Apparatus for separating unwanted contaminants from fibrous slurry
The invention provides an apparatus for screening a fibrous slurry including a rotatable drum whose circumferential wall includes a screen. The screen has spaced openings with longitudinal axes or elongations which are large relative to the transverse axe...
08/29/2000
5972229Method for filtering out particles from a fluid
A method for filtering out particles from a fluid is disclosed, wherein unfiltered fluid is guided into a filter housing of a filter apparatus and filtered fluid is guided from the filter housing, and wherein a rotary filter element, which has a filter st...
10/26/1999
5968315Process and apparatus for screening a fibre suspension in a pressurized screen having a rotating screen-drum
The present invention relates to an apparatus and a process for screening a fibre suspension such as papermaking stock in a pressurized screen especially in connection with pumping the liquid. The invention also relates to the use of the apparatus in a pr...
10/19/1999
5915569Device for separation and proportioning of different sized objects such as hulls and end pieces originating from cutting irradiated nuclear fuel assemblies
A device comprising two coaxial drums (22, 24) is proposed in order to separate and then proportion objects of different sizes. The objects are introduced into one end of the inner drum consisted mainly of a coil (32) wound in a spiral. Large objects are ...
06/29/1999
5894936Drum separator for brine shrimp eggs
A drum separator for separating brine shrimp eggs from a slurry containing an agglomeration of adult brine shrimp, brine shrimp eggs and debris includes a fluid source to maintain a slurry. The fluid source may be an internal spray jet disposed to spray a...
04/20/1999
5853585Rotary separator apparatus
A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is support...
12/29/1998
5836456Discrete material washing apparatus
A discrete material washing apparatus comprises a structure mounting an elongate trough having an inlet and an outlet. A dished tray is mounted on the structure and shaped to feed into the inlet. The tray is to receive disposal of a cementitious mixture t...
11/17/1998
5806684Fractionator for fractioning particulates in suspension
A fractionator for fractioning a suspension in at least two fractions, including a drum rotatable about a substantially horizontal access and having axially spaced end walls, a centrally arranged inlet for suspension, a flow channel for suspension in the ...
09/15/1998
5733450Rotary screening apparatus having a screening cylinder casing
A rotary screening device is disclosed which includes a rotating cylinder having an inlet end, an outlet end and a cylindrical wall formed at least partly from the screening surface. The cylinder is rotatably supported on wheels which are in turn mounted ...
03/31/1998
5630513Apparatus for fractionating suspensions
An apparatus for fractionating suspensions includes a tubular strainer (1) rotatable about a horizontal axis, and a spray device (5,7) arranged to spray the suspension against the strainer. The strainer has at least two strainer sections (2) spaced from e...
05/20/1997
5628912Rotary separator method for manure slurries
A method and apparatus for efficiently separating solids from liquid/solid slurries are disclosed. The slurry to be separated is retainably placed within a container having one or more lift paddles secured within its inner cavity. The container is support...
05/13/1997
5624578Separation apparatus nozzle assembly
A nozzle assembly (1) for use in a separation apparatus for separation of liquid suspensions the separation including such nozzle assembly, and a method for its use. In the nozzle assembly, the outlet end of the nozzle is biasable towards the inner surfac...
04/29/1997
5622625Method of manufacturing a drum
A rotary drum type device for separating solid particles from a liquid includes a rotary screen drum having support rods extending in the axial direction and arranged cylindrically and having a projecting portion in a radially outward end portion, and a w...
04/22/1997
5607587Screening apparatus for wood pulp
A rotary screening device is disclosed which may be advantageously used to increase the solid content of influent. The apparatus includes a rotating cylinder having an inlet end, an outlet end and, depending on the material to be screened, a cylindrical w...
03/04/1997
5575395Method and apparatus for screening fibrous suspensions
A fiber suspension, such as an in a pulp mill, is treated in an manner which minimizes both the investment and the operating costs associated with a screening plant. A single pump has an outlet connected to a knotter and primary and secondary screening st...
11/19/1996
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