The vacuum copying frames allowing perfect contact of positive film original to coated photosensitive screen printing matrix. The frame consists of rack at which the special glass plate is rotary seated; the plate position can be fixed both in vertical and in horizontal direction. The sub-frame with special membrane made from antistatic silicone rubber. The frame in the open position is held by gas struts.
The apparatus is equipped with oil-free vacuum pump which evacuates the air between the glass plate and the membrane resulting in perfect pushing the diapositive against the screen. The vacuum pump is operated via the built-in switch and may work during the whole copying period. In the lower part the special yellow fluorescent-tube lamp is mounted to make the handling with photosensitive material easier. The rack for type Gama is designed for wall hanging, the rack for Delta types is mounted on wheels and it is movable.