Test device

Claim 1

IN A ROTARY PRINT TEST DEVICE, A PLURALITY OF CYLINDERS HAVING THEIR AXES IN PARALLEL ALIGNMENT IN A COMMON PLANE AND SAID CYLINDERS FORMING PRESSURE NIPS, ONE OF SAID CYLINDERS SERVING AS AN IMPRESSION CYLINDER, ANOTHER OF SAID CYLINDERS SERVING AS A PLATE CYLINDER, AND A THIRD ONE OF SAID CYLINDERS SERVING AS A TRANSFER CYLINDER, SAID PLATE CYLINDER HAVING A PRINTING PLATE WHICH IS NORMALLY RECESSED FROM PRINTING POSITION AND SAID IMPRESSION CYLINDER HAVING MEANS FOR REMOVABLY SECURING THEREAROUND A SHEET TO BE PRINTED; MEANS FOR EFFECTING CONTINUOUS DRIVING OF SAID PLURALITY OF CYLINDERS IN ROTATION AT A PRE-DETERMINED TEST SPEED; FIRST POWER OPERATED MEANS CONNECTED TO SAID PRINTING PLATE FOR MOVING SAID PRINTING PLATE TO AND FROM PRINTING POSITION; OTHER REVERSIBLY OPERABLE POWER OPERATED MEANS RETAINING SAID IMPRESSION CYLINDER IN POSITION TO FORM ONE OF SAID PRESSURE NIPS WITH AN ADJACENT TRANSFER CYLINDER; AND MEANS TO CYCLE THE ACTUATION OF SAID FIRST AND SAID OTHER POWER OPERATED MEANS SUCCESSIVELY AT SAID PREDETERMINED TEST SPEED SUCH THAT SAID PRINTING PLATE IS IN PRINTING POSITION FOR ONLY ONE PASS OF SAID PRINTING NIP AND SAID IMPRESSION CYLINDER IS WITHDRAWN FROM SAID NIP POSITION AFTER SAID SHEET RECEIVES ONE PRINT IMPRESSION.