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US 4,947,743 AGranted
Apparatus for feeding a mass of particulate or fibrous material
AssigneeStake Technology Ltd.
InventorsDouglas B. Brown, Henri Malys
Life of this patent
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AssigneeStake Technology Ltd.
InventorsDouglas B. Brown, Henri Malys
Estimating the term…
Apparatus for compacting and advancing a mass of particulate or fibrous material to a discharge end of a conduit combines an auger with a reciprocating annular piston. The improvement of the invention is in driving the piston by way of a flywheel equipped crankshaft which also drives a dynamically counter balancing member to reduce vibrations transmitted to the frame of the apparatus. Special hydrostatic guide sleeves are used to guide the reciprocating piston at a high speed. Further improvements include gas and liquid vents and a cooling jacket, both associated with the conduit to increase efficiency of the compacting. A density sensor controlled conical choke member at the discharge end assists in maintaining uniform density of the highly compacted plug of the material. Also, it breaks up the exiting plug to improve subsequent processing of the material. The uniformity of the compacting is assisted by a modified shape of the leading face of the piston which is flat at the outer periphery and frusto conical near the minor diameter of the piston. The conduit preferably tapers at about 7' to 21' toward its discharge end.
Apparatus for feeding a mass of material comprised of solid particles and/or fibres, including a conduit provided with screw conveyor means, reciprocating annular piston means coaxial with and disposed in said conduit and around the screw conveyor means, first drive means for driving said screw conveyor means, and second drive means for driving the annular piston means in reciprocating fashion coaxially with the axis of the screw conveyor means, wherein said second drive means includes:
Apparatus for feeding a mass of material comprised of solid particles and/or fibres, including a generally cylindric conduit provided with screw conveyor means, reciprocating annular piston means coaxial with and disposed around the screw conveyor means, first drive means for driving said screw conveyor means, and second drive means for driving the annular piston means in reciprocating fashion coaxially with the screw conveyor means, wherein a frontal face portion of the piston means, when viewed in an end view, covers an area whose size is about 35% to about 60% of the entire inside cross-sectional area of the conduit, said frontal face portion comprising a frustoconical angled surface coaxial with the axis of the piston means, convergent in a direction upstream of the conduit and having an apex angle of about 140.degree. to about 170.degree..
Dependencies are inferred from the claim text.