Automotive windshield

Abstract

A windshield for automotive vehicles is disclosed wherein one or more scraping edges are disposed on its external side in the area wiped by the wiper blades. The scraping edges are an enamel-type material which is formed into strip-shaped profiles and bonded in in raised form to the surface of the glass plate. Varying amounts of metal particles may be added to the enamel material to make it conductive, and, when connected to the vehicle's electrical system, able to thaw ice and snow which accumulates on the lower part of the windshield immobilizing the wiper blade arm. The scraping edges or profiles are positioned at appropriate angles on the windshield to permit water scraped from the windshield wiper blades to run off easily to both sides.

I claim: 
     
       1. A windshield of plate glass for an automobile vehicle comprising on its external surface in the area covered by the path of the wiper blades at least one continuous scraping edge for each of the wiper blades, in which each scraping edge is formed by a raised strip-shaped profile disposed on the surface of the glass plate above the parked position of each blade and .[.arranged in the shape of a roof, each of said roof-shaped scraping edges.]. having the form of an inverted V with an obtuse angle included between the two arms of the inverted V, the length of each strip-shaped profiles being approximately equal to the length of each blade. 
     
     
       2. A windshield according to claim 1 for a vehicle with windshield wipers which lie in their rest position below the level of the engine hood, in which the strip-shaped profiles are located in the lower section of the windshield which lies below the level of the hood. 
     
     
       3. A windshield according to claim 1 in which the strip-shaped profiles are located below the normal lower reversing point of the wiper blades and above the .[.lower reversing point of the.]. parked position of the wiper blades and are passed over by the wiper blades after a number of normal wiper cycles as a result of an appropriate control circuit for the wiper movement. 
     
     
       4. A windshield according to claim 1 in which the windshield consists of laminated glass. 
     
     
       5. A windshield according to claim 1 in which the strip-shaped profiles consist of an electrically conducting material and are provided with connections to the electrical system of the vehicle and serve as heating conductors. 
     
     
       6. A windshield according to claim 5 in which the windshield consists of laminated glass and in which the strip-shaped profiles are baked on during the bending operation of the glass plates. 
     
     
       7. A windshield according to claim 1 in which the strip-shaped profiles are molded onto a base plate which is attached to the windshield as a whole. 
     
     
       8. A windshield according to claim 7 in which the strip-shaped profiles and the base plate consist of transparent plastic. .Iadd. 
     
     
       9.  A windshield of plate glass for an automobile vehicle, comprising on its external surface in the area covered by the path of the wiper blades at least one continuous scraping edge for each of the wiper blades, in which each scraping edge is formed by a raised strip-shaped profile disposed on the surface of the glass plate above the parked position of each blade and having the form of an inverted U, the length of each of said strip-shaped profiles being approximately equal to the length of each blade. .Iaddend. .Iadd.10. A windshield according to claim 9 in which both arms of each said inverted-U-shaped profile are positioned at a sufficient angle with the horizontal to facilitate the running off of water therefrom. .Iaddend. .Iadd.11. A windshield of plate glass for an automobile vehicle having at least one windshield wiper, comprising on its external surface in the area covered by the path of the wiper blade at least one continuous scraping edge for the wiper blade, in which said scraping edge is formed by a raised elongated profile disposed on the surface of the glass entirely above the parked position of the blade, said profile comprising a ceramic baking enamel material of the type which is applicable in paste form to plate glass, and   said profile being bonded by fusion directly to the plate glass material of   
     
     
        the windshield. .Iaddend. .Iadd.12.  A windshield according to claim 11 in which said scraping edge extends over substantially the entire width of said windshield. .Iaddend. .Iadd.13. A windshield according to claim 11 in which substantially all of said elongated profile is positioned at a sufficient angle with the horizontal to facilitate the running off of water therefrom. .Iaddend. .Iadd.14. A plate glass windshield for a motor vehicle having at least one windshield wiper, comprising on its external surface in the area covered by the path of the wiper at least one continuous scraping edge for cleaning the blade thereof, said scraping edge being formed by a raised elongated strip disposed on the surface of the windshield entirely above the parked position of said blade,   said strip having a principal raised portion, and a tapered portion of decreasing thickness between the principal raised portion and the surface of the windshield, and   said strip including enamel-type material bonded by fusion directly to the   
     
     
        plate glass material of the windshield. .Iaddend. .Iadd.15.  A windshield according to claim 14 in which said enamel-type material is a ceramic baking enamel material of the type which is applicable in the form of paste to cold plate glass. .Iaddend. .Iadd.16. A windshield according to claim 14 in which said enamel-type material is a screen-printable material. .Iaddend. .Iadd.17. A windshield according to claim 14 in which said enamel-type material includes fused material which has been fused at a high temperature. .Iaddend. .Iadd.18. A windshield according to claim 17 in which said high temperature is approximately 580° to 620° C. .Iaddend. .Iadd.19. A windshield according to claim 14 in which said enamel-type material is a ceramic baking enamel material of the type which is applicable in the form of paste to cold plate glass by screen printing and includes fused material which has been fused at a high temperature. .Iaddend. .Iadd.20. A windshield according to claim 19 in which said high temperature is approximately 580° C. to 620° C. .Iaddend. .Iadd.21. A windshield according to claim 14 in which said windshield includes thermally treated glass and said enamel-type material includes thermally treated enamel-type material which has been thermally treated at substantially the same temperature as said thermally treated glass. .Iaddend. .Iadd.22. A windshield according to claim 21 in which said windshield includes thermally bent glass. .Iaddend. .Iadd.23. A windshield according to claim 21 in which said windshield includes thermally prestressed glass. .Iaddend. .Iadd.24. A windshield according to claim 21 in which said windshield includes thermally bent and prestressed glass. .Iaddend. .Iadd.25. A windshield according to claim 21 in which said 
     
     
        windshield includes thermally tempered glass. .Iaddend. .Iadd.26.  A windshield according to claim 14 in which said elongated strip includes electrically conducting material adapted for connection to the electrical system of the vehicle for heating said windshield. .Iaddend. .Iadd.27. A windshield according to claim 9 in which substantially all of each said inverted-U-shaped profile is positioned at a sufficient angle with the horizontal to facilitate the running off of water therefrom. .Iaddend. .Iadd.28. A plate glass windshield for a motor vehicle having at least one windshield wiper, comprising at least one scraping edge on the external surface of the windshield in the area swept by the wiper for scraping debris from the wiper,   said scraping edge being formed by a raised elongated strip on the windshield located entirely above the parked position of said wiper so as to scrape such debris from said wiper at least during upward wiper movement,   said strip consisting of a ceramic baking enamel material of the type which is applicable in paste form to plate glass, and   said strip being bonded by fusion directly to the plate glass material of   
     
     
        the windshield. .Iaddend. .Iadd.29.  A windshield according to claim 28, in which said enamel material is a screen-printable material. .Iaddend. .Iadd.30. A windshield according to claim 29, in which said enamel includes fused material which has been fused at a high temperature. .Iaddend. .Iadd.31. A windshield according to claim 30, in which said high temperature is approximately 580° to 650° C. .Iaddend. .Iadd.32. A windshield according to claim 31, in which said high temperature is approximately 580° to 620° C. .Iaddend. .Iadd.33. A windshield according to claim 28, in which said strip has a principal raised portion, and a tapered portion of decreasing thickness between said principal raised portion and the surface of the windshield. .Iaddend. .Iadd.34. A windshield according to claim 33, in which said enamel material is screen-printable and includes material which has been fused at high temperature. .Iaddend. .Iadd.35. A windshield according to claim 34, in which said high temperature is approximately 580° to 
     
     
        620° C. .Iaddend. .Iadd.36.  A windshield according to claim 35, in which said windshield includes thermally treated glass and said enamel material includes material which has been thermally treated at substantially the same temperature as said thermally treated glass. .Iaddend. .Iadd.37. A plate glass windshield for a motor vehicle having at least one windshield wiper, comprising at least one scraping edge on the external surface of the windshield in the area swept by the wiper for scraping debris from the wiper,   said scraping edge being formed by a raised elongated strip located entirely above the parked position of said wiper so as to scrape debris from the wiper at least during upward wiper movement, substantially all of said strip being oriented at an angle to the horizontal so as to facilitate the running off of water and debris from the strip,   said strip consisting of a ceramic baking enamel material of the type which is applicable in paste form to plate glass, and   said strip being bonded by fusion directly to the plate glass material of   
     
     
        the windshield. .Iaddend. .Iadd.38.  A windshield according to claim 37, wherein said strip has a principal raised portion, and a tapered portion of decreasing thickness between the principal raised portion and the surface of the windshield. .Iaddend. .Iadd.39. A windshield according to claim 38, in which said enamel material is screen-printable and includes material which has been fused at high temperature. .Iaddend. .Iadd.40. A windshield according to claim 39, in which said high temperature is approximately 580° to 620° C. .Iaddend. .Iadd.41. A windshield according to claim 40, in which said windshield includes thermally treated glass and said enamel material includes material which has been thermally treated at substantially the same temperature as said thermally treated glass. .Iaddend.