Vibrating screen with coupling means

Claim 1

A SCREENING COMPRISING: A FIRST SET OF TRANSVERSELY SPACED SUPPORTING GRATE BARS; A SECOND SET OF TRANSVERSELY SPACED SUPPORTING GRATE BARS, THE GRATE BARS OF SAID SECOND SET BEING INTERDIGITATED BETWEEN THE GRATE BARS OF SAID FIRST SET, AND THE GRATE BARS OF SAID FIRST AND SECOND SETS BEING MOVABLE RELATIVE TO ONE ANOTHER THROUGH ARCUATE PATHS IN PARALLEL VERTICAL PLANES; EXTENDED SURFACE MESH SCREEN MEANS SUPPORTED IN SUPERIMP OSED RELATION ON THE GRATE BARS OF SAID FIRST AND SECOND SETS; SAID GRATE BARS INCLUDING FIRST AND SECOND SETS OF RESPECTIVE CROSS MEMBERS AFFIXED THERETO, ENTRAINING MEMBERS DEPENDING FROM THE UNDER SURFACE OF SAID MESH SCREEN MEANS, EACH OF SAID ENTRAINING MEMBERS CONTAINING A VERTICALLY EXTENDING SLOT, THE VERTICAL LENGTH OF SAID SLOT BEING GREATER THAN THE COSS-SECTIONAL DIMENSION OF SAID CROSS MEMBERS, SAID CROSS MEMBERS OF AT LEAST ONE OF SAID SETS OF GRATE BARS BEING SLIDINGLY ENTRAINED IN RESPECTIVE ONES OF THE SLOTS OF SAID ENTRAINING IN RESPECTIVE ONES OF THE MEANS FOR IMPARTING RELATIVE ROTATIONAL MOVEMENT TO THE GRATE BARS OF SAID FIRST AND SECOND SETS.