Back to results
US 5,254,149 AGranted
Process for determining the quality of temper of a glass sheet using a laser beam
AssigneeFord Motor Company
InventorsAmin H. Hashemi, Timothy L. Kelly
Life of this patent
Estimating the term…
Abstract
The quality of temper in a glass sheet is determined by repeatedly scoring the glass sheet with a laser beam, to incrementally penetrate the compression zone, until the glass sheet shatters.
Claims11
a process for determining temper quality in a glass sheet, comprising the steps of:
- A) scoring a major surface of a tempered glass sheet with a laser beam;
- and
- B) repeating step A a number of times sufficient to cause the glass sheet to shatter.
A process for determining temper quality in a glass sheet, comprising the steps of:
- A) scoring a major surface of a tempered glass sheet a first number of times with a laser beam;
- and
- B) scoring the major surface of the tempered glass sheet with a laser beam a second number of times sufficient to cause the glass sheet to shatter;
- wherein time intervals between the scorings of step A are shorter than the time intervals between the scorings of step B.
1 more element
Dependencies are inferred from the claim text.