Heatable windshield
AssigneePPG Industries Ohio, Inc.
InventorsCharles Voeltzel, Bruce Bartrug, James Finley, Allen Hawk, Lewis Palka, Frank Pazul, John Winter
Life of this patent
Estimating the term…
Abstract
An electrically heatable transparency has at least one substrate, a first bus bar spaced from a second bus bar, and a conductive coating formed over at least a portion of the substrate. The first and second bus bars are in electrical contact with the coating. At least one of the bus bars has an end region in electrical contact with the coating. The end region is tapered such that the coating is of substantially uniform thickness on the end region.
Claims22
An electrically heatable transparency, comprising:
- at least one substrate;
- a first bus bar spaced from a second bus bar;
- and
- an electrically conductive coating formed over at least a portion of the substrate, with the first and second bus bars in electrical contact with the coating,
- wherein at least one of the bus bars has an edge region in electrical contact with the coating, and the edge region is tapered such that the coating is of substantially uniform thickness on the edge region.
An electrically heatable transparency, comprising:
- at least one substrate;
- at least one bus bar carried on the substrate;
- a conductive coating over at least a portion of the substrate;
- and
- a conductive bridge extending between and electrically interconnecting the bus bar and the coating.
An electrically heatable transparency, comprising:
- a substrate;
- at least one bus bar;
- and
- a conductive coating in electrical contact with the bus bar,
- wherein the conductive coating includes a cut-out area, and the bus bar comprises a first portion, a second portion, and a middle portion,
- wherein the middle portion has a first segment extending between the first and second portions and spaced from the coating and a second segment in electrical contact with the coating and generally following an outline of the cut-out area, and
- wherein the first and second portions have a first width and the first and second segments of the middle portion have a second width less than the first width.
An electrically heatable transparency, comprising:
- a substrate;
- at least one bus bar;
- and
- a conductive coating in electrical contact with the bus bar,
- wherein the bus bar comprises a plurality of separate, spaced apart metallic pieces in contact with a conductive extension strip in electrical contact with a power source.
Dependencies are inferred from the claim text.