Patent ID: 7640712

Claim:
A muntin framework for supporting and separating individual panes of glass within the sash of a window or door, said muntin framework comprising: a) at least one exterior muntin bar, said at least one exterior muntin bar having a length extending continuously from one end of said sash to an opposite end thereof; b) at least one interior muntin cap configured for connection with said at least one exterior muntin bar for supporting and separating a plurality of windowpanes, said at least one interior muntin cap is configured to receive interior thereof at least a portion of said at least one exterior muntin bar so as to provide a connection therewith; c) at least one insert member formed from carbon fiber, said at least one carbon fiber insert member comprising a channel portion and at least one flange member, said channel portion is disposed between said at least one exterior muntin bar and said interior muntin cap and at said connection thereto, said at least one flange member is configured for engaging a peripheral edge of the windowpane to be supported so that wind load or impact against the windowpane is caused to be damped.