Etching machine

Claim 1

A MACHINE FOR ETCHING PRINTING CYLINDERS COMPRISING A FRAME, A UNITARY TROUGH MEMBER MOUNTED ON SAID FRAME AND HAVING SIDE BY SIDE WELLS ADAPTED TO CONTAIN QUANTITIES OF FIRST AND SECOND ETCHANTS RESPECTIVELY, A CARRIER MEMBER ADAPTED TO SUPPORT A PRINTING CYLINDER ABOVE SAID TROUGH MEMBER, MEANS OPERATIVELY ENGAGING AND MOUNTING SAID CARRIER MEMBER FOR VERTICAL MOVEMENT RELATIVE TO SAID TROUGH MEMBER SUCH THAT SAID PRINTING CYLINDER MAY BE SUBJECTED TO THE ACTION OF SAID ETCHANTS, RAISING AND LOWERING MECHANISMS OPERATIVELY CONNECTED TO SAID CARRIER MEMBER FOR EFFECTING VERTICAL MOVEMENT THEREOF RELATIVE TO SAID TROUGH MEMBER, MEANS OPERATIVELY ENGAGING AND MOUNTING SAID TROUGH MEMBER FOR LATERAL MOVEMENT RELATIVE TO SAID CARRIER MEMBER SUCH THAT SAID PRINTING CYLINDER MAY BE SUBJECTED IN SUCCESSION TO THE ACTION OF SAID FIRST AND SECOND ETCHANTS, SHIFTING MECHANISMS OPERATIVELY CONNECTED TO SAID TROUGH MEMBER FOR EFFECTING LATERAL MOVEMENT THEREOF RELATIVE TO SAID CARRIER MEMBER, AND MEANS FOR COORDINATING SAID RAISING AND LOWERING MECHANISMS AND SAID SHIFTING MECHANISMS.