position locating tangs 132 and stops 134 shown in fig5 are used to hold the screen frame in position the locating stops 134 and tangs 132 may be readjusted depending on a particular size for a given screen in general the size of the screen will dictate the position of locating tangs 132 according to an exemplary embodiment the locating tangs may be adjusted by electromechanical means so as to locate the screen frame and also pre stress it to prevent hour glassing of the frame according to a preferred embodiment the overall feeding process occurs within a few seconds and more preferably within about one second regardless of screen size according to alternative embodiments the inlet section may include additional adjustable guides for example the inlet section may include belts and or rollers for locating and affixing the frame for any secondary screening operations these guides may be made from materials that will be hard enough for good wear characteristics and pliable enough for effective location of the frame the guides may be adjusted so that the screen can be located in a rapid and accurate manner e g by using a screw and nut fastening arrangement a programmable end stop may be used to stop the screen in the line feed axis as described above operation of the inlet section on the screen assembly apparatus may be controlled by a computer system comprising operational software the computer system can handle safety interlocks the machine sequences and diagnostic procedures the inlet section can also be equipped with sensors for feeding basic status information to the computer system in step 105 a vacuum system 128 is used to removably secure a screen frame to.