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US 5,476,588 AGranted
Multi-layer composite screen
AssigneeNagaoka International Corporation
InventorTadayoshi Nagaoka
Life of this patent
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AssigneeNagaoka International Corporation
InventorTadayoshi Nagaoka
Estimating the term…
A multi-layer composite screen having filters of a plurality of layers superposed one upon another is provided. Each filter of the plurality of layers has wires of a substantially triangular or trapezoidal cross section arranged in parallel to one another with a continuous slit of a substantially V-shaped cross section being formed between respective adjacent wires, said slit widening increasingly inwardly from the surface of the screen. The wires of one filter of the respective adjacent filters cross the wires of the other filter and the respective adjacent filters are fixed to each other at crossing points of the wires of the respective filters. In one aspect of the invention, the wires are formed with linear projections extending in the longitudinal direction of the wires which facilitate electrical welding of the filters of the adjacent layers.
A multi-layer composite screen comprising filters of a plurality of layers superposed one upon another, each filter of said plurality of layers comprising wires of a substantially triangular or trapezoidal cross section arranged in parallel to one another with a continuous slit of a substantially V-shaped cross section widening increasingly inwardly from the surface of the screen being formed between respective adjacent wires, the wires of one filter of the respective adjacent filters crossing the wires of the other filter and the respective adjacent filters are fixed to each other at crossing points of the wires of the respective filters.
Dependencies are inferred from the claim text.