Method of and apparatus for opening scores in a glass sheet
AssigneePPG Industries, Inc.
InventorSanford M. Welton
Life of this patent
Estimating the term…
Abstract
Lateral scores in an annealed glass ribbon are opened by applying a bending moment about the score while applying additional tension to the glass ribbon adjacent its edges.
Claims19
In a method of severing a glass sheet having two opposed edges in compression relative to center of the glass sheet, wherein the method includes the steps of scoring the sheet between the opposed edges in compression with a score along an intended path of cut, and applying a bending moment at a first position about the score to sever the glass sheet, the improvement comprising:
- applying tension to the glass sheet adjacent at least a one of the edges in compression at a second position spaced from the first position;
- while
- practicing the step of applying a bending moment about the score.
An apparatus for severing a glass sheet wherein the apparatus is of the type having means for advancing the glass sheet along a sheet movement path;
- means for scoring the sheet in a direction transverse to the movement path;
- the improvement comprising:
- means mounted in the movement path for applying a bending moment to the glass sheet about the score;
- and
- means mounted in the movement path in spaced relation to said bending moment applying means for applying tension adjacent at least one edge of the glass sheet.
Dependencies are inferred from the claim text.