# US 4,395,622 A · Transparent heating pane

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- Number: US 4,395,622 A
- Document ID: US4395622A
- Status: Granted
- Kind: A
- Application number: 06/223,107
- Filed: 1981-01-07
- Granted: 1983-07-26
- Earliest claimed: 1980-01-08
- Assignees: Saint-Gobain Vitrage
- Inventors: Maurice Dran; Bernard Jamet
- Web page: https://patentgrep.com/patent/US4395622A

## CPC

- B32B 17/10376: {Laminated safety glass or glazing containing metal wires}
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10761: {containing vinyl acetal}
- H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
- H05B 2203/016: Heaters using particular connecting means
- H05B 2203/031: Heaters specially adapted for heating the windscreen wiper area
- Y10T 29/49083: Heater type
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heating glass plate (15, 20, 27, 34) has a heating network (17, 24, 31, 36) made up of wires embedded in a thermoplastic layer following curved directrices. A device for making a heating glass plate having a plate (39) for supporting thereon a plastic sheet. A bridge (44) is slidably supported on the plate and has thereon a sliding carriage (45) carrying wire-laying members (46). Means are provided for imparting reciprocal motion to the carriage. A rod (51) connects the carriage to a vertical spindle (52).

## Claims

### Claim 1

A laminated glass pane comprising a transparent thermoplastic layer interposed between two glass plates including a heating network of fine metallic wires inlaid in said thermoplastic layer between two collector strips, characterized in that the metallic wires have a diameter of approximately 15 .mu.m to be substantially invisible to the naked eye, are undulated along directrices forming arcs of circles are separated from each other and do not impair vision through the laminated glass pane.

### Claim 2 (depends on 1)

A glass plate in accordance with claim 1, further characterized in that the heating network is adapted to be coextensive with an area to be swept by a windshield wiper.

### Claim 3 (depends on 1)

A glass plate in accordance with claim 1, further characterized in that the arcs are of concentric circles.

### Claim 4 (depends on 1)

A glass plate according to claim 1, further characterized in that the arcs are of circles having equal radii.