Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1989-11-24
1990-12-04
Goldberg, Howard N.
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
291161, 29124, 29125, 29130, 29132, 100162B, 241293, 355 27, B02C 108
Patent
active
049747827
ABSTRACT:
A two roll pressure developer for a microencapsulated web or medial material includes rolls which have a support shaft through the center, a hollow annular shell, and load-bearing elastomer material between the shaft and the shell supporting the shell and controlling the deflection of the shaft under development loads. The elastomer material is formed as a plurality of discrete annular segments with inside diameters mounted on the shaft and outer diameters mounted in the shell. The segments are distributed along the length of the shaft so as to provide the roll with a variable modulus of elasticity which is highest at the axial center of the shaft and lower at the ends. In one embodiment, the segments are identical in width and are varied in pitch or axial spacing. In another embodiment, the segments are spaced at the same pitch but are varied in axial thickness. In a third embodiment, the segments are of equal size and spacing and are formed with a modulus of elasticity which is greatest at the axial center of the roll, and progressively lower toward the roll ends.
REFERENCES:
patent: 1837925 (1931-12-01), Thompson
patent: 3750246 (1973-08-01), Pessen
patent: 3812782 (1974-05-01), Funahashi
patent: 4727392 (1988-02-01), Stone et al.
patent: 4864343 (1989-09-01), Nelson
Cuda Irene
Goldberg Howard N.
The Mead Corporation
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