Abstract An air roller is constructed using the steps of forming a cylindrical porous metal core by bonding more porous end portions on a less porous center section, fixing the core on a shaft containing air passages leading to the center section and the end portions, rotating the shaft to grind the outer surface of the core to close tolerances and close its pores, coating the ground ends of the outer surface of the core to prevent etching, etching the uncoated center of the outer surface to open pores therein, and placing an outer cylindrical shell having end flanges about the core, and end flanges containing air escape apertures so that air escaping through the etched portion of the center section radially supports the shell and air escaping through the more porous end portions longitudinally supports the shell.
In the process of manufacturing an air roller, the steps of; a. forming a porous metal cylindrical core containing an axial bore by cementing end portions on a center section and allowing cement to block pores of the ends of the center section; b. mounting the core on a shaft containing air passages leading to the center section and the end portions of the core; c. rotating the shaft and finishing the outer surface of the core to a final finish dimension allowing the finishing to smear and close pores of the outer surface of the core; d. coating the ends of the outer surface of the core with an etching resistant material; e. etching the uncoated center portion of the outer surface of the core to open pores therein; f. removing the coating applied in step (d); and g. placing a cylindrical shell having end flanges about the porous metal core.
Claim 2
Dependent Claim
152 words
In the process of manufacturing an air roller, the steps of; a. forming a porous metal cylindrical core containing an axial bore by cementing end portions on a center section and allowing cement to block pores of the ends of the center section; b. mounting the core on a shaft containing air passages leading to the center section and the end portions of the core; c. rotating the shaft and finishing the outer surface of the core to a final finish dimension allowing the finishing to smear and close pores of the outer surface of the core; d. coating the ends of the outer surface of the core with an etching resistant material; e. etching the uncoated center portion of the outer surface of the core to open pores therein; f. removing the coating applied in step (d); and g. placing a cylindrical shell having end flanges about the porous metal core.
Claim 3
Dependent Claim
22 words
The process according to claim 1 wherein in step (a) the end portions are of a greater porosity than the center section.
Claim 4
Dependent Claim
22 words
The process according to claim 1 wherein in step (c) the finishing of the outer surface of the core is by grinding.