James M Schultz

US Patent:

44321694, Feb 21, 1984

Filed:

May 15, 1981

Appl. No.:

6/264034

Inventors:

James R. Schultz - Akron OH
Francis E. Smith - South Russell OH
Ralph J. Jurecki - Cleveland OH

Assignee:

Cole National Corporation - Cleveland OH

International Classification:

B24C 304
B24C 504
B24C 900

US Classification:

51424

Abstract:

The glassware etching apparatus etches glassware or other workpieces with abrasive grit which is entrained in an air flow. The etching apparatus includes a cabinet having a work surface, a transparent shield over the work surface and upper and lower supporting shelves below the work surface. A foamed plastic workholder for receiving the workpiece to be etched is mounted on the work surface. A venturi structure for entraining abrasive grit in the air flow is mounted in alignment with the workholder on the upper shelf. A linear tube extending from the venturi structure directs the air flow with entrained grit toward the workholder. The air flow is generated by vacuum cleaner-type motor-impellers in fluid connection with the venturi structure. Grit rebounding from the workpiece is trapped by a fabric filter which extends from the bottom of the work surface around the directing tube. A tapered element is connected with the bottom of the filter and the venturi structure for channelling the collected grit back to the venturi structure for reentrainment.