Tumbled, polished, vibrated broken tempered glass pieces

Details Tumbled, polished, vibrated broken tempered glass pieces Tumbled, polished, vibrated broken tempered glass pieces

2011-07-12

2011-07-12

Nguyen, Dung Van (Department: 3723)

Abrading

Abrading process

Tumbling

C451S033000

Reexamination Certificate

active

07976360

ABSTRACT:
An invention is provided for creating smoothed, heat-treated glass fragments. The invention includes placing a plurality of heat-treated glass fragments into a tumbling or vibrating apparatus. Each heat-treated glass fragment is formed from glass that has been heated to a temperature of at least 1000° Fahrenheit and rapidly cooled to a temperature below 700° Fahrenheit. The plurality of glass fragments are then tumbled or vibrated for a predetermined period of time such that surfaces of the heat-treated glass fragments are smoother than prior to tumbling. The glass fragments are thereafter removed from the tumbling apparatus, resulting in smoothed, heat-treated glass fragments that are suitable for direct handling without hand protection.

REFERENCES:
patent: 3030746 (1962-04-01), Firestine et al.
patent: 3498775 (1970-03-01), Simmons
patent: 5236134 (1993-08-01), Krawczyk et al.
patent: 5486135 (1996-01-01), Arpaio
patent: 6298690 (2001-10-01), Dahl et al.
patent: 6409500 (2002-06-01), Georgantas

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