MULTIPLE GLAZING UNIT

• US 3,837,129 A
• Filed: 10/20/1972
• Issued: 09/24/1974
• Est. Priority Date: 10/29/1971
• Status: Expired due to Term

• Current Assignee: Ernst Ingvar Losell
• Original Assignee: Ab Emmaboda Glasverk
• Inventors: Losell, Ernst Ingvar
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Epstein, Henry F.
• Time in patent office: 704 Days
• Field of Search: 52/304,305,308,616,627-628 161/45,183,100 156/99,107,109
• US Class Current: 52/309.14
• CPC Class Codes: E06B 5/10 for protection against air-raid or other war-like action; for other protective purposes
• CPC Class Codes: F41H 5/0407 Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66

Abstract

A multiple glazing unit comprising two glass sheets and at least one impact resistant middle sheet of plastic material which to compensate for the elongation of the plastic and for temperature changes is so mounted that there is an additional space for the middle sheet in which to expand in its own plane. The means for mounting the middle sheet is a U-shaped strip which engages the middle sheet only by means of the extremities of the U-limbs and which clamps the middle sheet solely by its inherent resilience.

Claims

1. A multiple glazing unit including two glass sheets and an intermediate means comprising at least one sheet of polycarbonate plastic material of high impact resistance interposed between said glass sheets, said intermediate means being mounted in a metal mounting strip positioned between the glass sheets along the edges thereof and, wherein the mounting strip has U-profile, and at at least one of each pair of opposite edges the intermediate means has clearance in the strip for thermal expansion in its own plane greater than the corresponding expansion of the glass sheets, and the U-profile mounting strip, in which the intermediate means is inserted, on the inner side of its flanges at the free edges thereof is formed with a pair of beads engaging the intermediate means while the remaining part of the flanges has a clearance larger than the thickness of the intermediate means, and the U-profile mounting strip on the outer sides of its flanges has projections resting on a pair of hollow metal spacing strips which are localized between the intermediate means and the glass sheets and which are retained together with the U-profile mounting strip between the glass sheets by a sealing composition.

2. A multiple glazing unit as claimed in claim 1, wherein the intermediate means consists of a single sheet of polycarbonate resin.

3. A multiple glazing unit as claimed in claim 1, wherein the intermediate means consists of two sheets of polycarbonate resin spaced apart by a strip of a soft elastic material at the marginal portions of said sheets.