Heated glass panels and methods for making electrical contact with electro-conductive films

• US 20070188842A1
• Filed: 02/10/2006
• Published: 08/16/2007
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Radiant Glass Industries, LLC
• Original Assignee: Radiant Glass Industries, LLC
• Inventors: Figurelli, Gino, Busick, Steve
• Granted Patent: US 7,362,491 B2
• Time in Patent Office: Days
• US Class Current: 359/267
• CPC Class Codes: F25D 21/04 Preventing the formation of frost or condensate
• CPC Class Codes: H05B 3/84 Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
• CPC Class Codes: Y10T 29/49083 Heater type
• CPC Class Codes: Y10T 29/49172 by molding of insulating material

Abstract

A heated glass panel assembly according to one embodiment of the invention may include a substrate having an electro-conductive film provided thereon. A conductor is positioned in contact with the electro-conductive film. A resilient material is positioned in contact with the conductor so that at least a portion of the conductor is located between the resilient material and the electro-conductive film. A retainer is positioned in contact with the resilient material so that at least a portion of the resilient material and at least a portion of the conductor are located between the retainer and the electro-conductive film. The retainer applies a compressive pressure to the resilient material which transfers at least a portion of the compressive pressure to the conductor to hold the conductor in contact with the electro-conductive film.

Claims

1. A heated glass panel, comprising:

a first glass sheet having an electro-conductive film provided thereon;

a first conductor positioned at a first location on the electro-conductive film;

a second conductor positioned at a second location on the electro-conductive film;

a resilient material positioned on at least said first and second conductors so that said first and second conductors are located between said resilient material and said electro-conductive film;

a second glass sheet positioned on said resilient material so that said first and second glass sheets are in generally parallel, spaced-apart relation; and

means for holding said first and second glass sheets together so that said first-and second glass sheets exert a compressive pressure on said resilient material and said first and second conductors, said compressive pressure holding said first and second conductors in contact with said electro-conductive film.

2. The heated glass panel of claim 1, further comprising an electrically conductive adhesive positioned between said first and second conductors and the electro-conductive film.

3. The heated glass panel of claim 1, wherein said resilient material comprises silicone foam.

4. The heated glass panel of claim 1, wherein means for holding said first and second glass sheets together comprises an adhesive adhered between said first and second glass sheets.

5. The heated glass panel of claim 4, wherein said adhesive comprises a butyl-based material.

6. The heated glass panel of claim 1, wherein means for holding said first and second glass sheets together comprises a frame positioned around at least a portion of a perimeter of said first and second glass sheets.

7. The heated glass panel of claim 1, wherein said first and second conductors comprise a generally elongate, bar-like configuration having a generally rectangular cross-section.

8. The heated glass panel of claim 1, wherein said first and second conductors comprise braided wire strands.

9. The heated glass panel of claim 1, wherein said first and second conductors comprise a generally elongate, rod-like configuration having a generally circular cross-section.

10. The heated glass panel of claim 1, wherein said first and second conductors comprise stranded wire.

11. The heated glass panel of claim 1, wherein said first and second conductors comprise one or more selected from the group consisting of copper, silver, gold, aluminum, and alloys thereof.

12. The heated glass panel of claim 1, wherein said first and second conductors have respective thicknesses greater than about 0.15 mm.

13. The heated glass panel of claim 12, wherein said first and second conductors have respective thicknesses in a range of about 0.76 mm to about 2.1 mm.

14. A method for making a heated glass panel, comprising:

providing a first glass sheet having an electro-conductive film provided thereon;

positioning a first conductor at a first location on the electro-conductive film;

positioning a second conductor a second location on the electro-conductive film;

positioning a resilient material on at least portions of said first and second conductors so that said first and second conductors are located between said resilient material and said electro-conductive film;

positioning a second glass sheet on said resilient material so that said first and second glass sheets are in generally parallel, spaced-apart relation; and

securing said first and second glass sheets together so that said first and second glass sheets exert a compressive pressure on said resilient material and said first and second conductors, said compressive pressure holding said first and second conductors in contact with said electro-conductive film.

15. The method of claim 14 further comprising attaching a first wire lead to said first conductor and attaching a second wire lead to said second conductor.

16. The method of claim 14, wherein securing said first and second glass sheets together further comprises:

urging the first and second glass sheets together to exert the compressive pressure; and

applying an adhesive between said first and second glass sheets.

17. The method of claim 14, wherein securing said first and second glass sheets together further comprises mounting said first and second glass sheets within a frame.

18. The method of claim 14, wherein positioning said first and second conductors at respective first and second locations on the electro-conductive film further comprises placing an adhesive between said first and second conductors and the electro-conductive film.

19. The method of claim 18, wherein placing an adhesive between the electro-conductive film and said first and second conductors comprises positioning an electrically conductive tape between said first and second conductors and the electro-conductive film.

20. The method of claim 19, wherein placing an electrically conductive tape between said first and second conductors and the electro-conductive film comprises adhering a first side of the electrically conductive tape to said first and second conductors and adhering a second side of the electrically conductive tape to the electro-conductive film.

21. An assembly, comprising:

a substrate having an electro-conductive film provided on at least one side of said substrate;

a conductor positioned in contact with the electro-conductive film;

a resilient material positioned in contact with said conductor so that at least a portion of said conductor is located between said resilient material and the electro-conductive film; and

a retainer positioned in contact with said resilient material so that at least a portion of said resilient material and at least a portion of said conductor are located between said retainer and the electro-conductive film, said retainer applying a compressive pressure to said resilient material, said resilient material transferring at least a portion of the compressive pressure to said conductor to hold said conductor in contact with the electro-conductive film.

22. The assembly of claim 21, wherein said conductor comprises one or more selected from the group consisting of copper, silver, gold, aluminum, and alloys thereof.

23. The assembly of claim 21, wherein said conductor has a thickness greater than about 0.15 mm.

24. The assembly of claim 21, wherein said substrate comprises glass.

25. The assembly of claim 24, wherein said retainer comprises glass.

26. The assembly of claim 25, further comprising an adhesive material provided between said glass substrate and said glass retainer, said adhesive material holding together said glass substrate and said glass retainer.

27. The assembly of claim 26, wherein said adhesive material comprises a butyl-based adhesive material.

28. The assembly of claim 21, further comprising an electrically conductive adhesive positioned between said conductor and said electro-conductive film.

29. The assembly of claim 28, wherein said electrically conductive adhesive comprises an electrically conductive adhesive transfer tape.

30. The assembly of claim 21, wherein said resilient material comprises silicone foam tape.

31. A method for making electrical contact with an electro-conductive film provided on a substrate, comprising:

providing a length of conductor;

positioning the length of conductor on the electro-conductive film;

positioning a resilient material over at least a portion of the conductor so that the at least a portion of the conductor is located between the resilient material and the electro-conductive film; and

positioning a retainer over at least a portion of the resilient material so that the at least a portion of the resilient material and the at least a portion of the conductor are located between the retainer and the electro-conductive film, the retainer applying a compressive pressure to the resilient material, the resilient material transferring at least a portion of the compressive pressure to the conductor to hold the conductor in contact with the electro-conductive film.

32. The method of claim 31, wherein positioning the length of conductor on the electro-conductive film further comprises placing an adhesive between the electro-conductive film and the conductor.

33. The method of claim 32, wherein placing an adhesive between the electro-conductive film and the conductor comprises positioning an electrically conductive tape between the electro-conductive film and the conductor.

34. The method of claim 33, wherein placing an electrically conductive tape between the electro-conductive film and the conductor comprises adhering a first side of the electrically conductive tape to the conductor and adhering a second side of the electrically conductive tape to the electro-conductive film.

35. The method of claim 31, wherein positioning a retainer comprises:

placing a transparent material over the resilient material;

moving the transparent material and substrate together to compress the resilient material; and

fixing together the transparent material and substrate.

36. An assembly, comprising:

a substrate having an electro-conductive film provided on at least one side of said substrate;

a conductor having a thickness of at least about 0.15 mm; and

an electrically conductive adhesive positioned between said conductor and said electro-conductive film.