Tensioned projection screen

A method of making a projection screen apparatus comprising:

• obtaining a perimeter frame and a projection screen, wherein the perimeter frame includes an upper frame member, a lower frame member, a left frame member and a right frame member,
• forming in at least two of the frame members a groove or track,
• wherein the projection screen has fastening edges on at least two opposite sides, the method comprising further fastening the projection screen to the perimeter frame by inserting the fastening edge in the groove or track of a frame member, and
• inserting an auxiliary element in the groove or track next to a fastening edge, to prevent the fastening edge from exiting the groove,
• wherein the fastening edge and the auxiliary element are pressed against each other by the walls of the groove.

A method of constructing a projection screen on site, comprising:

• providing a perimeter frame as a kit of parts with a projection screen, the perimeter frame including an upper frame member, a lower frame member, a left frame member and a right frame member,
• wherein in at least two of the frame members there is a groove or track, the projection screen being provided with fastening edges on at least two opposite sides, and
• fastening the projection screen to the perimeter frame by inserting the fastening edge in the groove or track of a frame member,
• wherein an auxiliary element is insertable in the groove or track next to a fastening edge, to prevent the fastening edge from exiting the groove, and wherein the fastening edge and the auxiliary element are pressed against each other by the walls of the groove.

A kit of parts comprising projection screen apparatus, the kit comprising a perimeter frame and a projection screen, wherein the perimeter frame includes an upper frame member, a lower frame member, a left frame member and a right frame member,

• wherein at least two of the frame members have a groove or track,
• wherein the projection screen has fastening edges on at least two opposite sides for fastening the projection screen to the perimeter frame by inserting the fastening edge in the groove or track of a frame member, and
• the projection screen apparatus including an auxiliary element can be inserted in the groove or track next to a fastening edge, to prevent the fastening edge from exiting the groove,
• wherein the fastening edge and the auxiliary element are pressed against each other by the walls of the groove.