Patent ID: 6351923
Filing Date: 2002-03-05
Classification: E06B

Abstract:
A spacer frame bar comprising:an elongate tubular spacer member having first and second side webs for engaging first and second glass panes of a window assembly in spaced relationship, and an upper web for facing inwardly towards an interpane space between said panes and a lower web for facing outwardly from a perimeter of said window assembly; said lower web of said spacer member being substantially free of openings; and said upper web of said spacer member having a plurality of openings for passage of air therethrough and comprising: at least first and second corrugations formed in said upper web, each said corrugation defining an upwardly extending ridge portion and a downwardly extending channel portion, so that said corrugations form an elongate thermal energy conductive path across said upper web which is greater in length than said spacer width between said side webs; said corrugations further being oriented so that only an upper edge of each said ridge portion is exposed to solar radiation in said interpane space between said glass panes and said channel portions of said corrugations are substantially shaded from solar radiation by adjacent corrugations, so that said upper web of said spacer member forms said elongate conductive path without causing increased thermal gain of said spacer member when said window assembly is exposed to said solar radiation.