Abstract: A multipane window unit is provided in which a sash frame is formed having an integral spacing structure upon which glazing panes are directly affixed. The spacing structure is formed integrally with the sash frame at internal glazing surfaces. Adhesive can be affixed to the internal glazing surfaces to attach the glazing panes. In this manner, a rigid, structural sash frame can be formed prior to attachment of the glazing panes, thereby eliminating the need for using separately manufactured insulating glass units while obtaining similar and improved benefits.

Abstract: Methods and apparatus are provided for mounting one or more glazing panes or insulating glass units into a window sash frame member having spaced side walls joined by an inner facing frame surface with a spacing structure disposed on the frame surface. Glazing panes are placed against strips of adhesive sealant within the window sash frame. Folding glazing beads hingedly attached to the side or inner walls of the frame member are folded against the glazing panes to secure them to the window sash frame member and/or to cover the glazing pane edges.

Abstract: Various desiccant, vapor barrier and/or sealant components are provided for a multipane window unit sash assembly having an integral glazing pane mounting structure. The components have varying shapes and features, which may include glazing pane mounting surfaces, spacer functions, dual seal capabilities and muntin bar retaining functions. Various materials can be used to fabricate the components, including adhesive, sealant, sealant strip, tape, foam, resin, metallic or plastic materials, or combinations of such materials. The components may be preformed, extruded onto the sash, or otherwise applied. Automated assembly of the components to the sash is also disclosed.

Abstract: A multipane window unit is provided in which a sash frame is formed having an integral spacing structure upon which glazing panes are directly affixed. The spacing structure is formed integrally with the sash frame at internal glazing surfaces. Adhesive can be affixed to the internal glazing surfaces to attach the glazing panes. In this manner, a rigid, structural sash frame can be formed prior to attachment of the glazing panes, thereby eliminating the need for using separately manufactured insulating glass units while obtaining similar and improved benefits.