Method of prestressing at least one bent sheet of a sandwich typ

Details Method of prestressing at least one bent sheet of a sandwich typ Method of prestressing at least one bent sheet of a sandwich typ

1979-08-29

1981-05-19

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65107, 65114, 65115, C03B 2704

Patent

active

042682975

ABSTRACT:
A method of prestressing at least one of the glass sheets of a sandwich safety glass, while being bent in a furnace, the glass sheet, after passing through a bending zone, being passed by a blow system and cooled by cooling air in the furnace in a temperature zone above the transformation point but below the deformation point of the glass, and an apparatus for such prestressing comprising a travelling die supporting superimposed sheets, a bending furnace zone to soften the sheets, and a cooling zone, the cooling zone having a blow system that subjects the bent sheet or sheets to cooling air.

REFERENCES:
patent: 2118183 (1938-05-01), Fowler
patent: 2680936 (1954-06-01), Grotefeld
patent: 3008272 (1961-11-01), Black et al.
patent: 3125430 (1964-03-01), Richardson

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