Vibratory screening system and screen therefor
AssigneeEmerson Electric Co.
InventorBrian S. Carr
Life of this patent
Estimating the term…
Abstract
A screen having a frame, three screen cloth layers and a laminating solidified layer with perforations therethrough. The screening layer of the screen cloth is typically of the finest mesh with increasing coarseness to the support mesh. The solidified layer is positioned by placement on the supporting mesh where it is fused to impregnate through each of the screen layers to form surfaces on either side of the lamination. A heat press is employed to so configure the solidified layer. A nonstick sheet between the screening mesh and the heat press molds texture into the surface of the solidified layer for reduced slippage of material being screened on the assembly. The screen lamination is stretched and bonded to a screen frame.
Claims14
A screen comprising
- a frame;
- a first porous layer fixed in tension about the periphery thereof to the frame and including first screen cloth;
- a second porous layer including second screen cloth having larger interstices than and being layered with the first screen cloth and fixed in tension about the periphery thereof to the frame;
- a solidified layer having perforations therethrough, the solidified layer impregnating the first screen cloth and the second screen cloth.
A screen comprising
- a first porous layer including first screen cloth;
- a second porous layer having larger interstices than and being layered with the first porous layer;
- a solidified layer having perforations therethrough, the solidified layer impregnating the first screen cloth and fixed to the second porous layer, the layer being textured at the surface of the first screen cloth.
A process for manufacturing a screen, comprising
- layering at least two porous layers and a fusible layer having perforations therethrough;
- heating and compressing the juxtaposed porous layers and fusible layer to fuse the fusible layer and impregnate at least one of the two porous layers with the fusible layer;
- resolidifying the fusible layer;
- tensioning the layered porous layers and resolidified fusible layer;
- bonding the tensioned layered porous layers and resolidified fusible layer to a frame.
A process for manufacturing a screen, comprising
- layering at least two porous layers and a fusible layer having perforations therethrough;
- layering a first nonstick sheet to one side and a second nonstick sheet to the other side of the at least two porous layers and the fusible layer, one of the nonstick sheets including texture on the side in contact with one of the at least two porous layers and the fusible layer;
- heating and compressing the layered porous layers, fusible layer and nonstick sheets to fuse the fusible layer and impregnate at least one of the two porous layers with the fusible layer;
- resolidifying the fusible layer, resolidifying the fusible layer including molding the texture on the nonstick sheet into one surface of the resolidifying fusible layer;
- removing the nonstick sheets.
Dependencies are inferred from the claim text.