Screen deck construction

Claim 1

IN A VIBRATING SCREEN APPARATUS, A SCREEN DECK INCLUDING A FRAME SUPPORTING A SCREENING MEANS ON WHICH THE MATERIAL TO BE SCREENED IS DEPOSITED, SAID SCREENING MEANS INCLUDING AT LEAST TWO JUXTAPOSED SECTIONS OF SCREEN EACH EXTENDING LONGITUDINALLY OF THE DECK FRAME SUBSTANTIALLY COEXTENSIVELY THEREWITH, SAID SECTIONS HAVING DOWNWARDLY PROJECTING PORTIONS ON THE INNER MARGINS THEREOF, AN ELONGATE LONGITUDINALLY EXTENDING MEMBER DISPOSED BELOW THE LEVEL OF THE SCREEN SECTION AND FEXIDELY SECURED AT LEAST AT ITS ENDS AND SEVERAL INTERMEDIATE POINTS TO SAID FRAME AND PROVIDING AN UPEARDLY FACING LONGITUDINAL GROOVE, AND PORTIONS PROJECTING DOWNWARDLY INTO SAID GROOVE, CLAMPING MEANS ENGAGING THE TOP SURFACES OD SAID MARGINS AND BEING CONNECTED TO SAID MEMBER AT A PLURALITY OF PLACES INCLUDING AT LEAST SEVERAL PLACES INTERMEDIATE THE ENDS OF SAID MEMBER FOR CLAMPING SAID MARGINS AGAINST PORTIONS OF SAID MEMBER ADJACENT SAID GROOVE, AND MEANS CONNECTED TO EACH OF THE OUTER MARGINS OF THE SECTIONS AND APPLYING TENSION TO SAID SECTIONS INDEPENDENTLY OF ONE ANOTHER.