Laser sealed vacuum insulation window

Details Laser sealed vacuum insulation window Laser sealed vacuum insulation window

1985-08-19

1987-07-28

Kittle, John E.

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

52171, 52741, 52788, 156107, 156109, E06B 324, E06B 712, B32B 1700

Patent

active

046831541

ABSTRACT:
A laser sealed evacuated window panel is comprised of two glass panes held spaced apart in relation to each other by a plurality of spherical glass beads and glass welded around the edges to provide an evacuated space between the glass panes that is completely glass sealed from the exterior. The glass welded edge seal is obtained by welding the edges of the glass panes together with a laser beam while the glass panes and bead spacers are positioned in a vacuum furnace and heated to the annealing point of the glass to avoid stress fracture in the area of the glass weld. The laser welding in the furnace can be directed around the perimeter of the glass panel by a combination of rotating the glass panel and linearly translating or aiming the laser with a relay mirror.

REFERENCES:
patent: 3960534 (1976-06-01), Oates
patent: 3990201 (1976-11-01), Falbel
patent: 4039718 (1977-08-01), Kallenborn
patent: 4198254 (1980-04-01), LaRoche et al.
patent: 4204015 (1980-05-01), Wardlaw et al.
patent: 4339482 (1982-07-01), Glaser et al.

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