A laminated electroconductive window

Abstract

Abstract A laminated, electrically heated window comprising accordionfolded bus bars making surface to surface contact with a transparent electroconductive film on a surface of a rigid transparent panel to insure intimate sliding contact between the bus bars and the film when the panel and the bus bars expand or contract at different rates as the temperature of the window changes during use. A specific embodiment of the present invention suitable for an automobile windshield comprises a laminated, electroconductive window comprising one or two glass sheets, a layer of transparent, electroconductive coating on the inner surface of one or both of said glass sheets, a layer of plastic interlayer material, and a pair of accordion-folded bus bars extending along the opposite side edges of the interlayer material. Each bus bar has one surface bonded to a surface of said layer of transparent interlayer material that faces an electroconductive coating and the other surface of the folded bus bars is in sliding surface to surface contact with said coating. The folded bus bars flex in response to differences in expansion and contraction between the layer of interlayer material and the coated glass and maintain good electrical contact with the coating due to the surface to surface contact therebetween. Intimate surface to surface contact is obtained during lamination of the glass to the layer of plastic interlayer material.

Inventors

• 👤 W Wagner

Bibliographic Details