Abstract: An integrated multipane window sash is fabricated from a sash frame having an inside perimeter. An adhesive material is applied to the inside perimeter. The adhesive material has sufficient stiffness to function as a mounting structure for glazing panes, and may also function as a spacing structure. A first glazing pane is mounted to a first side of the adhesive mounting structure. A second glazing pane is mounted to a second side of the adhesive mounting structure or to a separate adhesive mounting structure. The adhesive mounting structure can be applied by co-extrusion with the sash profile, by post-extrusion, manually or automatically and can comprise, for example, a bead of adhesive, a preformed adhesive foam, a preformed adhesive tape, or a chemical sealant. The adhesive mounting structure can be combined with a desiccant.

Abstract: A window sash frame is provided with a glazing pane installation opening accessible from a first side thereof and a glazing pane support surface on a second side thereof. A first glazing pane is inserted into the installation opening and an outside surface perimeter of the pane is placed adjacent to the support surface. A second glazing pane is then inserted into the opening. An inside surface perimeter of the second pane is mounted (e.g., via an adhesive bead, strip, tape or foam) to an inside surface perimeter of the first glazing pane. The adhesive thickness is such that the panes are separated by a space, which can contain air or an inert insulating gas. A glazing bead is installed along at least a portion of the glazing pane installation opening after the glazing panes have been inserted. A spacer can alternatively or additionally be provided between the glazing panes.

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: 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 integrally spacing structure is formed integral with the sash frame at vertical internal glazing surfaces. Adhesive can be affixed to the vertical internal glazing surfaces 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.