Method of making a laminated windshield

• US 4,744,844 A
• Filed: 01/12/1987
• Issued: 05/17/1988
• Est. Priority Date: 01/12/1987
• Status: Expired due to Fees

• Current Assignee: Ford Motor Company
• Original Assignee: Ford Motor Company
• Inventors: Hurst, Garfield W.
• Primary Examiner(s): Gallagher, John J.
• Application Number:
  US07/002,485
• Time in Patent Office: 491 Days
• Field of Search: 156/99, 156/102, 156/106, 219/203, 219/345, 65/24, 65/26
• US Class Current: 156/101
• 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 17/10293 Edge features, e.g. inserts or holes
• CPC Class Codes: B32B 17/10807 Making laminated safety glass or glazing; Apparatus therefor
• CPC Class Codes: B32B 17/10889 shaping the sheets, e.g. by using a mould B32B17/10816 takes precedence
• CPC Class Codes: B32B 17/10935 as a preformed layer, e.g. formed by extrusion

Abstract

A method of making a windshield is disclosed. A first glass template (10) is cut. An opaque material is bonded to a surface of the glass template. A conductive material is bonded to portions of the opaque and portions of the surface of the glass template to form electrically conductive terminals. A slippage inducing material is placed on portions of the opaque area not having electrically conductive terminal material thereon. A second glass template (24) is cut. The first and second glass templates are placed in a glass bending device (26). The glass templates are bent with the electrically conductive terminal areas and slippage inducing material permitting relative movement between the templates during the bending thereof without the production of glass chips. The first and second glass templates are separated and an electrically conductive coating is applied between terminal areas of opposite polarity on the first glass template. The glass templates are reunited with an interposed laminating interlayer and laminated to form a laminated glass windshield.

Claims

1. A method of making a windshield having two sheets of glass laminated together by a laminating interlayer which comprises the steps of:

cutting a first glass template from a sheet of glass;

placing on a selected surface of said first glass template opaque material which is bondable to said selected surface to form opaque areas on said selected surface which do not transmit light in the visible wave length area;

bonding said opaque material to said selected surface of said first glass template to form said opaque areas;

placing on portions of both said opaque areas and said selected surface of said first glass template conductive material which is bondable to portions of both said opaque areas and said selected surface to form electrically conductive terminal areas for an electrically conductive coating to be applied between terminal areas of opposite polarity;

placing on portions of said opaque areas not having electrically conductive terminal areas thereon a slippage inducing material which is bondable to portions of said opaque areas to permit slippage of a glass template thereover;

bonding said conductive material to said portions of said opaque areas and said selected surface area;

bonding said slippage inducing material to portions of said opaque areas;

cutting a second glass template from a sheet of glass;

placing said second glass template and said first glass template in a glass bending device in such a manner that said selected surface of said first glass template is in facing relationship with a surface of said second glass template;

bending said first and said second glass templates, said electrically conductive terminal areas and slippage inducing material permitting relative movement between said first and said second glass templates during said bending thereof without the production of glass chips;

separating said first and said second glass templates;

applying an electrically conductive coating between said terminal areas of opposite polarity on said first glass template;

reuniting said first and said second glass templates with an interposed laminating interlayer; and

laminating said first and said second glass templates together to form a laminated glass windshield.

2. The method of claim 1 in which said slippage inducing material is the same as said conductive material and is applied in the same step as said conductive material is applied.

3. A method of making a windshield having two sheets of glass laminated together by a laminating interlayer which comprises the steps of:

cutting a first glass template from a sheet of glass;

placing on a selected surface of said first glass template opaque material which is bondable to said selected surface to form opaque areas on said selected surface which do not transmit light in the visible wave length area;

bonding said opaque material to said selected surface of said first glass template to form said opaque area;

placing on portions of both said opaque areas and said selected surface of said first glass template conductive material which is bondable to portions of both said opaque areas and said selected surface to form electrically conductive terminal areas for an electrically conductive coating to be applied between terminal areas of opposite polarity;

placing on portions of said opaque areas not having electrically conductive terminal areas thereon a slippage inducing material which is bondable to portions of said opaque areas to permit slippage of a glass template thereover;

bonding said conductive material to said portions of said opaque areas and said selected surface area;

bonding said slippage inducing material to portions of said opaque area;

applying an electrically conductive coating between said terminal areas of opposite polarity on said first glass template;

cutting a second glass template from a sheet of glass;

placing said second glass template and said first glass template in a glass bending device in such a manner that said selected surface of said first glass template is in facing relationship with a surface of said second glass template;

bending said first and said second glass templates, said electrically conductive terminal areas and slippage inducing material permitting relative movement between said first and second glass templates during said bending thereof without the production of glass chips;

separating said first and said second glass templates;

reuniting said first and said second glass templates with an interposed laminating interlayer; and

laminating said first and second glass templates together to form a laminated glass windshield.

4. The method of claim 3 in which said slippage inducing material is the same as said conductive material and is applied in the same step as said conductive material is applied.