Muntin assembly and method of installing

DETAILED DESCRIPTION The present invention is best summarized as a muntin bar assembly in which muntin bar molded anchor elements are nailed to a window sash or door frame at spaced intervals by utilizing a two-part implement which holds and stabilizes the anchor while driving a nail provided in a bore of the anchor into the interior edge of a window sash or sliding door frame with precision.
A coacting molded clip includes a split shank engaged frictionally in a recess formed in the end of each muntin bar.
Each clip includes a pair of opposing spring arms having interior detents which interlock with detent recesses of the anchor element when the clip is forced over a crowned surface of the anchor element to complete the installation of the muntin bar assembly.
The primary object of the invention is to simplify to the greatest possible extent the installation of simulating muntin bar assemblies on window sash or sliding doors by homeowners, while minimizing the likelihood of breaking window panes or damaging the window sash or sliding door frames during the installation process.
A further object of the invention is to provide a muntin bar assembly of extremely low cost which employs molded plastics anchor elements and clips, and in which the muntin bars can be formed of wood or can be molded or extruded from plastics.
Another important object of the invention is to provide a holding, stabilizing and nail driving device to simplify attaching the muntin bar anchor elements to the interior edges of sash or sliding door frames while minimizing the likelihood of breaking the window or door glass, or damaging the frames.
Other features and advantages of the invention will become apparent to those skilled in the art during the course of the following description.