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US 4,265,742 AGranted
Screen element
AssigneeHermann Screens Manufacturing Company (Proprietary) Limited
InventorsFritz O. Bucker, Henning F. W. M. A. Lambrecht
Life of this patent
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AssigneeHermann Screens Manufacturing Company (Proprietary) Limited
InventorsFritz O. Bucker, Henning F. W. M. A. Lambrecht
Estimating the term…
The invention provides screen elements of polyurethane, or a material having similar characteristics, having metal reinforcing rods embedded in and extending only in a single direction and across the full width of the screen element between lateral support zones. A plurality of screen elements can be replaceably secured to a complementally shaped support frame member by a combined elongate fastening formation formed by two abutting elongate fastening formations respectively of two screen elements in edge-to-edge abutting relationship. For this purpose each screen element has an elongate fastening formation along the under side of each of its two opposite lateral edges, in addition to one or more securing formations at each end to secure screen formations together in end-to-end relationship. The invention also provides a screen deck consisting of screen elements secured to support frame members, as described above. The invention further provides a screening apparatus, such as a sieve bend, including such a screen deck.
A replaceable plastic or elastomeric screen element having an apertured body portion extending between two opposite sides and two opposite ends, each side including a continuous elongate protruding fastening means extending along substantially the entire length of the side for fastening the screen element along each side to a screen support member, each fastening means being adapted to form, with a corresponding fastening means of an adjoining similar screen element, a matching combined pair when two screen elements are fitted closely together in edge-to-edge relationship, the pair being adapted to be brought into releasable substantially unyielding positive engagement with a complementary elongate fastening recess of the screen support member.
A replaceable plastic or elastomeric screen element having an apertured body portion extending between two opposite sides and two opposite ends, each side including a continuous elongate recessed fastening means extending along substantially the entire length of the side for fastening the screen element along each side to a screen support member, each fastening means being adapted to form, with a corresponding fastening means of an adjoining similar screen element, a matching combined pair when two screen elements are fitted closely together in edge-to-edge realtionship, the pair being adapted to be brought into releasable substantially unyielding positive engagement with a complementary elongate fastening protrusion of the screen support member.
Dependencies are inferred from the claim text.