Abstract: Nozzle apparatus for hermetically sealing the edges of multi-pane window units capable of performing such sealing even though the edges of the panes are misaligned. A thermoplastic sealing compound is introduced into the spacing at the edges of substantially aligned panes, and spring biased sealant containment plates disposed on opposite sides of the nozzle, each engaging a pane edge, confines the sealing material, and a blade associated with each containment plate trims the material with respect to each pane resulting in a clean joint from which excess sealing material has been trimmed, and the position of the trimming blades is automatically oriented to the pane edges.

Abstract: Apparatus for dispensing heat meltable material from a container including a heated head adapted to engage the upper surface of the material within the container to melt the material immediately below the head. The head includes an inlet passage whereby melted liquid material may enter a reservoir defined in the head, and a dispensing pump includes an inlet communicating with the head reservoir whereby the melted material is pumped from the head reservoir for dispensing purposes. The head inlet passage includes flow control means for retaining melted material within the reservoir, and the head includes means for improving the heat exchanging characteristics between the head and the material confined within the reservoir.