Sectional screen cylinder
AssigneeA. Ahlstrom Corporation
InventorChauncey Mason
Life of this patent
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Abstract
A screen cylinder is made up of a plurality of identical ceramic elements in arcuate form having screen openings, and opposite longitudinally extending edges carrying a tongue and groove, respectively. The elements are joined one to the other along their edges by inserting the tongues into the grooves to form a complete cylinder. Different diameter and lengths of screen cylinders may be formed by varying the number of elements in each closed arrangement of elements, and the closed arrangements may be disposed end-to-end with an intermediate connecting ring between them. End rings are provided to maintain the elements in a generally cylindrical configuration. Cinch rods connected between the end rings and under tension subject the elements in assembly to axial compression.
Claims38
Apparatus for forming a screen cylinder comprising:
- a plurality of elements formed solely of a ceramic material and having spaced opposite first and second edges;
- means defining screen openings in each element;
- and
- means for interconnecting said elements one with the other along their edges to form a substantially continuous screen cylinder.
Apparatus for forming screen cylinders of different diameters, each cylinder having an axis comprising:
- a plurality of substantially identical, generally arcuate, elements formed of a ceramic material, each having spaced opposite edges extending generally in the direction of said axis;
- means defining screen openings through each element;
- and
- means for interconnecting said elements one with the other along their edges to form substantially continuous screen cylinders, the inner or outer surface of each said element having a predetermined radius of curvature, a first predetermined number of elements of said plurality of elements being assembled to form a first generally continuous screen cylinder of one diameter, and a second predetermined number of elements of said plurality of elements being assembled to form a second generally continuous screen cylinder of a larger or smaller diameter, respectively, in comparison with said first cylinder, said first and second predetermined numbers being different one from the other.
A screen cylinder having an axis comprising:
- a plurality of generally arcuate elements each having spaced opposite edges extending generally in the direction of said axis;
- means defining screen openings through each element;
- and
- means interconnecting said elements one with the other along their edges to form a substantially continuous screen cylinder, the inner or outer surface of each said element having a predetermined curvature about an axis parallel to and not coincident with the axis of said cylinder.
A method of constructing a screen cylinder having an axis comprising the steps of:
- casting from a ceramic material a plurality of elements each having opposite, generally parallel, edges and screen openings therethrough;
- and
- joining the elements together along said edges to form a substantially continuous screen cylinder with the edges of the elements extending generally in the direction of said axis.
Apparatus for forming a screen cylinder comprising;
- a plurality of elements formed of a ceramic material and having spaced opposite first and second edges;
- means defining screen openings in each element;
- means for interconnecting said elements one with the other along their edges to form a substantially continuous screen cylinder;
- said interconnecting means including means along said first edges defining generally arcuate projecting ribs and means along said second edges defining recesses generally complementary in shape to said arcuate ribs;
- the ribs and recesses being interconnected one with the other, each said interconnected rib and recess forming a pivotal connection therebetween enabling relative pivotal action between the adjoining elements about a pivot axis generally parallel to the axis of the cylinder.
Dependencies are inferred from the claim text.