Patent ID: 6370838
Filing Date: 2002-04-16
Classification: E06B

Abstract:
A double sealed insulating unit comprising two parallel opposed panes with a spacing and sealing system therebetween defining, with said panes, a sealed gas space between them, said spacing and sealing system comprising a spacer frame with a primary seal between each side of the spacer frame and the opposing pane face and a secondary seal extending between the panes outside the outer peripheral face of the spacer frame,wherein each primary seal is greater than 0.4 mm thick on construction of the unit and comprises at least 7 grams of sealant material on each side of the spacer frame per meter of the spacer frame length, and wherein the spacer frame comprises an elongate hollow metal member having opposed outer and inner walls connected together by two opposed side walls, each side wall defining therein an elongate recess accommodating at least a part of the sealant material, each recess having an arcuate section having a center of curvature located laterally within the outward lateral edge of a respective side wall.