Device for cutting and grinding a doughnut shaped substrate and

Details Device for cutting and grinding a doughnut shaped substrate and Device for cutting and grinding a doughnut shaped substrate and

1993-01-19

1994-08-30

Lavinder, Jack

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51283E, 51206R, 408 1R, 125 20, B23B 3500

Patent

active

053416066

ABSTRACT:
A device and method for cutting and grinding a hard but brittle material (such as glass plate, etc.) for producing a doughnut-shaped substrate are provided. The device of the present invention comprises a tubular core rod and shank extending therefrom and coaxial therewith. A plate is attached to the rod and shank and extends therefrom. A skirt is attached to the plate and surrounds the rod. Both the rod and skirt include at least one circumferential cavity. A core drill and a skirt drill are integral with the core rod and skirt, respectively. The cavities, skirt, and drills include diamond whetstone parts.

REFERENCES:
patent: 3822516 (1974-07-01), Huber
patent: 4541758 (1985-09-01), Frank
patent: 4800686 (1989-01-01), Hirabayashi
patent: 4843766 (1989-07-01), Umeda
patent: 4872289 (1989-10-01), Yukawa
Phamphlet: Semi Automatic Simultaneous Processing Machine of Glass Disk Inside & Outer Circumstances Shiba R & D.
Magazine: Lens. Prism Working Techniques '80 Publ. Nov. 2, 1985.

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