Slide frames formed from identical halves - having projecting, flat, hollow cylinders at corners pressed together to form complete frame

摘要

The slide frames are in two parts but manufactured from a single mould. The latter is used in a continuous injection moulding process producing many non-interchangeable half-pieces. The latter are pressed together to form a complete frame and can be separated again. The frame halves have identical side walls with corresponding fixing elements having a clamping effect. They are in the form projecting, flat-ended, hollow cylinders. The diametrically opposite fixing elements (6, 6a) are of identical form. This construction creates a compact double clamping effect. The hollow cylinders (7) can contain co-operating ledges and ring segments (8).