Screening machine and associated screen panel

A method for installing a pre-tensioned screen in a gyratory sifter comprising:

• inserting the pre-tensioned screen into the gyratory sifter, the pre-tensioned screen comprising:
• a frame having a plurality of cross-members and a beveled edge extending downwardly and away from the frame;
• and
• a filtering element secureably attached to the frame;
• actuating a seal location device with a mechanical actuator;
• mating the pre-tensioned screen to a ball box;
• wherein the mating comprises placing the beveled edge of the pre-tensioned screen against an inclined face of the ball box;
• and
• securing the pre-tensioned screen with a screen deck by contacting a top portion of the pre-tensioned screen with a bottom portion of the screen deck while maintaining a contacting relationship between the beveled edge of the pre-tensioned screen and the inclined face of the ball box.

A method for installing a pre-tensioned screen panel in a screening machine comprising:

• inserting the pre-tensioned screen panel into the screening machine, the pre-tensioned screen panel comprising:
• a frame having a rigid external beveled edge that extends from the periphery of the frame on at least two sides;
• and
• a filtering screen material secureably attached to the frame;
• mating the pre-tensioned screen panel to a ball box;
• wherein the mating comprises placing the beveled edge of the pre-tensioned screen panel against an inclined face of the ball box;
• and
• securing the pre-tensioned screen with a screen deck while maintaining a contacting relationship between the beveled edge of the pre-tensioned screen and the inclined face of the ball box.