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US 5,417,859 AGranted
Undulating screen for vibratory screening machine and method of fabrication thereof
AssigneeDerrick Manufacturing Corporation
InventorJohn J. Bakula
Life of this patent
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AssigneeDerrick Manufacturing Corporation
InventorJohn J. Bakula
Estimating the term…
A screening screen assembly for a vibratory screening machine including an apertured plate, and a bonded subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate, and bonding the undulating bonded subassembly to the apertured plate.
A screening screen assembly comprising a substantially planar apertured plate, and an undulating subassembly of a fine screening screen and a support screen, said fine screening screen being bonded in contiguous relationship to said support screen by areas of fused plastic with unobstructed portions of said contiguous screens therebetween, said subassembly being bonded to said apertured plate to form said screen assembly.
A screening screen assembly for a vibrating screening machine comprising a substantially planar apertured plate, and a bonded undulating subassembly of a coarse support screen and a fine screening screen bonded to each other by a fused perforated plastic grid, said subassembly including a fine screening screen side and a coarse support screen side, said screen assembly further including means bonding said substantially planar apertured plate to the coarse support screen side of the bonded undulating subassembly.
A screening screen assembly for a vibrating screening machine comprising a substantially planar apertured plate, and a bonded undulating subassembly of a coarse support screen and a fine screening screen bonded to each other by a fused perforated plastic grid, said subassembly including a fine screening screen side and a coarse support screen side, said screen assembly further including means bonding said substantially planar apertured plate to the fine screening screen side of the bonded undulating subassembly.
A screening screen assembly for a vibratory screening machine comprising a substantially planar apertured plate, an undulating subassembly of a support screen and a fine screening screen having ridges and troughs, fused plastic bonding means bonding said fine screening screen to said support screen at spaced locations while leaving unobstructed portions of said screens therebetween, undersides on said troughs, and means bonding said undersides of said troughs to said apertured plate.
Dependencies are inferred from the claim text.