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US 5,211,187 AGranted
String doffer mechanism
AssigneePhilip Morris Incorporated
InventorsGeorge S. Boswell, Joao C. A. Gomes, Joseph P. Maciejczyk
Life of this patent
Estimating the term…
Abstract
A mechanism for removal of contaminants from a stream of material having a plurality of rotatable cylindrical doffer elements each having flights supplied with cleaning means thereon mounted substantially parallel to one another within a frame. The mechanism is provided with means for adjusting both the positions along the frame of the doffer elements as well as the vertical elevation of the doffer elements with respect to the frame.
Claims49
A doffer mechanism for removing contaminants from a stream of material comprising:
- a frame having at least two oppositely disposed sides;
- a plurality of doffer elements, each doffer element having two ends and an axis of rotation passing through the two ends;
- means for mounting the two ends of each of the doffer elements to opposite sides of the frame at positions along the sides of the frame, such that the doffer elements are positioned across the plane of the frame and the axes of rotation of the plurality of doffer elements are substantially parallel, the means for mounting further comprising pivotal means for pivoting the doffer elements between a first position and a second position, the first position being substantially within the plane of the frame and the second position being substantially out of the plane of the frame;
- means for rotating the plurality of doffer elements about their respective axes of rotation, the rotation of the doffer elements causing agitation of the stream of material such that the stream of material travels substantially in the direction of the rotation;
- and
- means for adjusting the elevation above or below the plane of the frame of at least one of the plurality of doffer elements.
3 more elements
A doffer mechanism for removing contaminants from a stream of material comprising:
- a frame having at least two oppositely disposed sides;
- a plurality of doffer elements, each doffer element having two ends and an axis of rotation passing through the two ends;
- means for mounting the two ends of each of the doffer elements to opposite sides of the frame at positions along the sides of the frame, such that the doffer elements are mounted across the frame and the axes of rotation of the plurality of doffer elements are substantially parallel;
- means for rotating the plurality of doffer elements about their respective axes of rotation, and
- means for adjusting the elevation above or below the frame of at least one of the plurality of doffer elements, the means for adjusting the elevation comprising a pair of bearing mounts, a pair of blocks which attach to opposite sides of the frame and means for adjustably fastening the bearing mounts to the blocks in at least two configurations, the means for fastening including a plurality of holes in the block, with at least one hole corresponding to each possible elevation of at least one of the plurality of doffer elements.
2 more elements
A doffer mechanism for removing contaminants from a stream of material comprising:
- a frame having at least two oppositely disposed sides;
- a plurality of doffer elements, each doffer element having two ends and an axis of rotation passing through the two ends;
- means for mounting the two ends of each of the doffer elements to opposite sides of the frame at positions along the sides of the frame, such that the doffer elements are positioned across the plane of the frame and the axes of rotation of the plurality of doffer elements are substantially parallel, the means for mounting further comprising pivotal means for pivoting the doffer elements between a first position and a second position, the first position being substantially within the plane of the frame and the second position being substantially out of the plane of the frame;
- means for rotating the plurality of doffer elements about their respective axes of rotation, the rotation of the doffer elements causing agitation of the stream of material such that the stream of material travels substantially in the direction of the rotation;
- and
- means for selectively adjusting the positions along the sides and in the plane of the frame at which the ends of at least one doffer element are mounted to the frame.
3 more elements
A doffer mechanism for removing contaminants from a stream of material comprising:
- a subframe;
- a pair of frames of substantially the same size and shape, each of the frames being pivotally attached to the subframe so that each frame pivots about the subframe;
- a plurality of doffer elements each having two ends and an axis of rotation, the ends of the doffer elements mounted to each of the frames such that the doffer elements are mounted across each of the frames, the axes of rotation of the doffer elements in each frame being substantially parallel;
- means for rotating the plurality of doffer elements about their axes;
- and
- means for selectively pivoting each of the frames between a first, substantially horizontal position and a second, substantially vertical position.
3 more elements
A doffer mechanism for removing contaminants from a stream of material comprising:
- at least two frames of substantially the same size and shape;
- a plurality of doffer elements, each doffer element having two ends and an axis of rotation passing through the two ends;
- means for mounting the two ends of each of the doffer elements to opposite sides of the frames at positions along the sides of the frames, such that the doffer elements are mounted across the frames and the axes of rotation of the plurality of doffer elements in each frame are substantially parallel;
- means for rotating the plurality of doffer elements about their respective axes of rotation;
- means for selectively directing the stream of material to a selected one of the frames of doffer elements for removal of contaminants from the stream by the selected one of the frames of doffer elements.
2 more elements
A doffer element for removing contaminants from a stream of material comprising:
- a hollow tube having two ends and a central longitudinal axis passing through each of the two ends;
- a pair of circular plates affixed at the ends of the hollow tube;
- a shaft attached to each of the circular plates, each shaft having two ends such that the central longitudinal axis of the hollow tube passes through each of the two ends of each shaft;
- and;
- means for affixing a cleaning surface to the doffer element.
2 more elements
A doffer mechanism comprising:
- a continuous chain, the chain having an inner surface and an outer surface;
- means for driving the continuous chain;
- a plurality of doffer elements, each doffer element having a doffer sprocket for converting the motion of the continuous chain into rotational motion for rotating the doffer element, at least one of the doffer sprockets being in contact with the outer surface of the continuous chain;
- and
- at least one idler sprocket, the idler sprocket contacting the inner surface of the continuous chain.
2 more elements
A doffer mechanism comprising:
- a continuous belt, the belt having an inner surface and an outer surface;
- means for driving the belt;
- a plurality of doffer elements, each doffer element having a doffer drum for converting the motion of the continuous belt into rotational motion for rotating the doffer element, at least one of the doffer elements being in contact with the outer surface of the continuous belt;
- and
- at least one idler drum, the idler drum contacting the inner surface of the continuous belt.
2 more elements
Dependencies are inferred from the claim text.