Patent ID: 8752354

Claim:
A frame assembly for sheet material, comprising: an inner frame section having at least one recess for receiving the sheet material therein, wherein the at least one recess of the inner frame section is fittable around the peripheral edge of the sheet material; a first outer frame for receiving the sheet material with the inner frame section fitted thereon; a second outer frame for receiving the sheet material with the inner frame sect fitted thereon; and means to connect the first and second outer frames together; wherein the first and second outer frames together define a space for receiving the inner frame section, wherein the first and second outer frames are adapted to apply a compressive force to the inner frame section to clamp the inner frame section and substantially prevent movement of the inner frame section relative to the first and second outer frames, and wherein a geometry of the inner frame section is such that the inner frame section has a neck portion and a base portion, the neck portion including a mouth of the at least one recess, wherein the outer cross-sectional shape of the inner frame section is such that the base portion is wider than the neck portion.