Method of and apparatus for scoring a coated substrate
AssigneePPG Industries, Inc.
InventorRobert P. DeTorre
Life of this patent
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Abstract
An automotive window is manufactured by silk screening a pattern of a ceramic paste on a piece of glass having peripheral dimensions greater than the peripheral dimensions of the window. During the silk screening, portions of the screen extending beyond the pattern are supported by glass portions extending beyond the window to prevent bending of the screen near the pattern. The piece is scored through the pattern to define the window or a window blank within the piece and thereafter the glass around the window is removed. The window is then tempered at which time the ceramic paste fuses to the window.
Claims22
A method of manufacturing a sheet of refractory material having a predetermined configuration and having a pattern on a surface of the sheet with at least a portion of the pattern at the marginal edge of the sheet, comprising the steps of:
- silk screening a ceramic paste pattern within edges of a piece of refractory material having peripheral dimensions greater than the peripheral dimensions of the sheet so as to support at least a screen portion which extends beyond the ceramic paste pattern by portions of the refractory piece that extend beyond the peripheral dimensions of the sheet;
- scoring the refractory piece to define the sheet within the piece, said scoring step including scoring through the ceramic paste pattern to be at the marginal edges of the sheet;
- and
- removing the sheet from the piece.
A method of tempering a glass sheet, comprising the steps of:
- silk screening a heat absorbing ceramic paste pattern on a piece of glass to define a glass sheet to be tempered, said silk screening step being practiced while supporting screen portions extending beyond the screen pattern by trim which extends beyond the heat absorbing pattern on the glass piece;
- removing the trim to provide the glass sheet to be tempered, the glass sheet having as removed peripheral and marginal edges and heat absorbing material on the marginal edge of at least one surface of the sheet;
- and
- tempering the glass sheet having the as removed edges and heat absorbing material on the marginal edge of the sheet surface.
Dependencies are inferred from the claim text.