Flachglass Aktiengesellschaft

Wolfgang Zernial

Hans-Henning Nolte

Jurgen Reiss

A motor-vehicle window comprises a glass pane having an outer edge and a peripheral black obscuration band extending around the pane edge and leaving a central portion of the pane clear and unobstructed. This band is at least partially formed of a coating-deposited black conductor capable of generating heat when an electric current is passed through it. Thus an electrical current can be passed through the conductor to heat at least a portion of the pane at the obscuration band. The conductor may be positioned side-by-side with the band, disposed in a recess in the band or overlie the band. The conductor may define a heated wiper rest zone on the window.

Vehicle window with black obscuration band incorporating a black

The drying of a hydrated alkali metal silicate aqueous solution on a substrate to produce a light-transmissive fire-resistant layer is carried out at a temperature of about 100.degree. C. in a drying chamber which is initially filled with water vapor. An operation of the water vapor is condensed and the atmosphere is replenished with helium, oxygen, nitrogen or a mixture thereof so that during the drying, the atmosphere consists at least 90% by volume of water vapor and one or more of these gases, the balance being nitrogen and/or argon and/or sulfur hexafluoride.

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Gelsenkirchen, Germany

Wolfgang Zernial