Abstract A glazing insert for a door or a window frame is formed of a substantially rigid foam plastics material, such as polyethylene, polypropylene, P.V.C. or urea formaldehyde. The insert may be formed by moulding, extrusion, or machining operations or may be formed in situ in a channel in the door or window frame by injection of the foam plastics material into the channel. A single, double, treble, or multiple-glazed unit may be formed by positioning an insert in a frame and inserting one or more sheets of glazing material into corresponding grooves in the insert. Alternatively, the unit may be formed by supporting at least one sheet of glazing material in a channel in a frame and injecting the foam plastics material into the channel.
A METHOD OF FORMING A MULTIPLE-GLAZED DOOR OR WINDOW UNIT, COMPRISING INSERTING AT LEAST TWO SHEETS OF GLAZING MATERIAL IN PARALLEL CHANNELS IN A FRAME, EACH OF SAID CHANNELS HAVING A BOTTOM AND SIDE WALLS, SAID SIDE WALLS HAVING FLANGE PORTIONS WHICH PROJECT INWARDLY OF SAID CHANNELS AND SO CLOSELY APPROACHING OPPOSITE SURFACES OF THE RESPECTIVE SHEET OF GLAZING MATERIAL AS TO PROVIDE ONLY A SMALL CLEARANCE ADJACENT SAID SURFACES; AND INJECTING A FOAM PLASTICS MATERIAL INTO THE SPACE BETWEEN THE BOTTOM AND SIDE WALLS OF EACH CHANNEL AND THE RESPECTIVE SHEET OF GLAZING MATERIAL TO FORM A SUBSTANTIALLY RIGID FOAM PLASTICS MATERIAL INSERT, WHILE UTILIZING SAID FLANGE PORTIONS TO RETAIN THE INJECTED MATERIAL WITHIN SAID CHANNELS.
Claim 2
Independent Claim
117 words
A METHOD OF FORMING A MULTIPLE-GLAZED DOOR OR WINDOW UNIT, COMPRISING INSERTING AT LEAST TWO SHEETS OF GLAZING MATERIAL IN PARALLEL CHANNELS IN A FRAME, EACH OF SAID CHANNELS HAVING A BOTTOM AND SIDE WALLS, SAID SIDE WALLS HAVING FLANGE PORTIONS WHICH PROJECT INWARDLY OF SAID CHANNELS AND SO CLOSELY APPROACHING OPPOSITE SURFACES OF THE RESPECTIVE SHEET OF GLAZING MATERIAL AS TO PROVIDE ONLY A SMALL CLEARANCE ADJACENT SAID SURFACES; AND INJECTING A FOAM PLASTICS MATERIAL INTO THE SPACE BETWEEN THE BOTTOM AND SIDE WALLS OF EACH CHANNEL AND THE RESPECTIVE SHEET OF GLAZING MATERIAL TO FORM A SUBSTANTIALLY RIGID FOAM PLASTICS MATERIAL INSERT, WHILE UTILIZING SAID FLANGE PORTIONS TO RETAIN THE INJECTED MATERIAL WITHIN SAID CHANNELS.
Claim 3
Dependent Claim
21 words
A method according to claim 1, in which said inserts are formed in all of the channels in one injection operation.
Claim 4
Dependent Claim
26 words
A method as claimed in claim 1 in which said foam plastics material is selected from the group consisting of polyethylene, polypropylene, polyvinylchloride, and urea formaldehyde.