IMPROVEMENTS IN OR RELATING TO THERMALLY INSULATING GLAZING

摘要

A thermally insulating glazing arrangement includes a rigid sheet (1) of transparent material and spaced therefrom a thin film (7) of transparent plastics material. The film is mounted in position on at least one resilient member (5), the resilient member being deformed so that it imparts tension to the film even if the film expands thermally. The resilient member (5) is formed as part of a bead (2) which is mounted on the edge of the rigid sheet (1) of transparent material. A glazing arrangement can be fabricated by locating two beads (2) in position on two opposed edges of the rigid sheet (1) and lightly stretching the film (7) across the beads. The edges of the film (7) are secured to the outer surfaces (9, 10) of each bead (2) by means of an adhesive and pressure (11) is applied to part of the film in order to deform the resilient members (5) on the beads so that they apply tension to the film.