초록 ▼

An insulated glass unit formed from a pair of glass sheets, one of which has an electroconductive coating, i.e. a first sheet, is fabricated by positioning the first sheet on a vacuum support and the other sheet, i.e. second sheet, spaced above the first sheet a sufficient distance therefrom to prev

An insulated glass unit formed from a pair of glass sheets, one of which has an electroconductive coating, i.e. a first sheet, is fabricated by positioning the first sheet on a vacuum support and the other sheet, i.e. second sheet, spaced above the first sheet a sufficient distance therefrom to prevent arcing during electrical heating of the marginal edges of the second sheet. After the marginal edges of the second sheet are heated to a temperature sufficient to cause sagging of the marginal edges, the two sheets are brought together to join the marginal edges by fusion. A strip heater heats the edges of the sheet to a temperature sufficient to prevent chilling of the marginal edges of the upper sheet when contacting the marginal edges of the lower sheet. Thereafter, the sheets are separated from one another and air moved between the sheets to bloom the edes. After blooming the edges, the joined glass sheets are annealed, and an insulating gas moved into the airspace through a pore hole. Thereafter the pore hole is sealed.

대표청구항 ▼

A method of making a multiple glazed unit having two sheets with one of the sheets having an electroconductive coating, comprising the steps of: providing two sheets, the first sheet having a non-conductive major surface with a conductive stripe along the marginal edges thereof and the second sheet

A method of making a multiple glazed unit having two sheets with one of the sheets having an electroconductive coating, comprising the steps of: providing two sheets, the first sheet having a non-conductive major surface with a conductive stripe along the marginal edges thereof and the second sheet having an electroconductive coating: positioning the first and second sheets in facing spaced relationship to one another a sufficient distance to prevent arcing during the practice of the following moving step; moving electric current along the conductive stripe of the first sheet to heat the marginal edges to a temperature sufficient to sag material edges of the first sheet; discontinuing the practice of said moving step: displacing the sheets relative to one another to move marginal edges of the first and second sheets into contact with one another; and pulling the sheets apart to provide an airspace therebetween.