Intaglio printing machine with cover assemblies and removable ink trough

Claim 1

IN A ROTARY INTAGLIO PRINTING MACHINE HAVING A PRINTING CYLINDER ROTATABLY SUPPORTED ON A FRAME AND MEANS FOR ROTATING SAID CYLINDER IN OPPOSITE DIRECTIONS, AN INK TROUGH HAVING A CAVITY DISPOSED BELOW SAID CYLINDER WITH THE LOWER PORTION OF SAID CYLINDER IMMERSED IN INK IN SAID CAVITY, MEANS SUPPORTING SAID TROUGH FOR SELECTIVE VERTICAL DISPLACEMENT BETWEEN A RAISED POSITION WHERE THE LOWER PORTION OF SAID CYLINDER IS IMMERSED IN THE INK IN SAID CAVITY AND A LOWERED POSITION WHERE SAID TROUGH IS REMOVABLE FROM SAID MACHINE, SAID TROUGH HAVING UPWARDLY FACING SURFACES ON OPPOSITE SIDES OF SAID CAVITY AND SAID CYLINDER AND EXTENDING LONGITUDINALLY OF SAID CYLINDER, MEANS COOPERATING WITH SAID TROUGH FOR ENCLOSING SAID PRINTING CYLINDER DURING OPERATION COMPRISING TWO SIMILAR MULTI-PART COVER ASSEMBLIES DISPOSED ONE ON EACH SIDE OF SAID CYLINDER AND EACH HAVING (A) UPPER AND LOWER PARTS AND (B) MEANS MOUNTING SAID UPPER PART ON SAID LOWER PART, MEANS PIVOTALLY MOUNTING THE LOWER PART OF EACH OF SAID COVER ASSEMBLIES ON PARALLEL AXES ON SAID FRAME FOR MOVEMENT OF SAID COVER ASSEMBLIES TOWARD AND