HEATABLE LAMINATED WINDSHIELD CONSTRUCTION

• US 3,790,752 A
• Filed: 03/26/1973
• Issued: 02/05/1974
• Est. Priority Date: 03/26/1973
• Status: Expired due to Term

• Current Assignee: Premakaran T. Boaz, Roman Surowiex
• Original Assignee: Premakaran T. Boaz, Roman Surowiex
• Inventors: Boaz, Premakaran T., Surowiex, Roman
• Primary Examiner(s): Mayewsky, Volodymyr Y.
• Application Number:
  US05/345,168
• Time in Patent Office: 316 Days
• Field of Search: 219/203,522,541,543,544 161/192 244/134 296/84
• US Class Current: 219/522
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/06 Heater elements structurally combined with coupling elements or holders
• CPC Class Codes: H05B 3/86 the heating conductors being embedded in the transparent or reflecting material H05B3/845 takes precedence

Abstract

A heatable, laminated windshield construction is disclosed in which an electrical connection is made to a transparent interlayer which has a conductive coating thereon. When power is supplied to the conductive coating, the result is a heating of the windshield. The connection to the conductive coating is completely sealed so that the moisture is unable to penetrate the laminated construction.

Claims

1. A heatable, laminated windshield construction which comprises:

a transparent interlayer having a pair of principal faces with a conductive coating on at least one of said faces, said conductive coating being one which produces heat when an electrical current is applied thereto, said transparent interlayer having a notched out portion, first and second laminating transparent interlayers positioned adjacent both principal faces of said transparent interlayer, first and second transparent glass sheets positioned adjacent and bonded to said laminating interlayers;

a circuit board including a non-conductive base with conductive paths thereon, said circuit board extending at least in part into said notch of said transparent interlayer;

electrical circuit path means in part on said conductive coating of said transparent interlayer and in part on said conductive paths of said circuit board for electrically connecting said conductive paths of said circuit board to said conductive coating; and

sealing means for filling in the free volume about said notch of said transparent interlayer when said windshield is subjected to heat and pressure in a laminating operation.

2. The windshield construction of claim 1 wherein:

said sealing means is formed of the same material as said laminating interlayers.

3. The windshield construction of claim 2 wherein:

said sealing means is a U-shaped piece of material in which each of the legs thereof in part overlays a juxtaposed portion of both a side of said circuit board and a portion of said notched out portion of said transparent interlayer, and in which the connecting portion of said U-shaped piece of material overlies the juxtaposed portion of the front of said circuit board and said transparent interlayer.

4. The windshield construction of claim 3 wherein:

said electric circuit path means are formed by thin paths of copper foil.