Printing machines

Claim 1

PRINTING MACHINE FOR PRINTING FORM SETS BY MEANS OF PRINTING MEMBERS, IN WHICH EITHER THE FORM SETS OF THE PRINTING MEMBERS OR BOTH CAN VARY IN THICKNESS, AN ANVIL DEFINING A SUPPORT SURFACE FOR RECEIVING THE PRINTS MEMBERS AND FORM SET IN SUPERPOSED RELATIONSHIP; A FORM SET AND PRINTING MEMBER GUAGE MEANS FOR DEFINING A PRINTING STATION ON THE ANVIL; SAID STATION HAVING A FIRST AND A SECOND END; A ROLLER PLATEN HAVING AN AXIS; CARRIER MEANS SUPPORTING THE ROLLER PLATEN ABOVE THE ANVIL, SAID CARRIER MEANS MOVABLE TO DRIVE THE PLATEN AXIS LATERALLY ACROSS THE ANVIL BETWEEN A HOME POSITION ADJACENT SAID FIRST END OF SAID PRINTING STATION AND AN ACTUATED POSITION ADJACENT SAID SECOND END OF SAID PRINTING STATION; LOWERING MEANS FOR MOVING THE PLATEN TOWARDS THE SUPPORT SURFACE ADJACENT SAID HOME POSITION DURING AND IN RESPONSE TO INITIAL MOTION OF THE CARRIER FROM HOME POSITION; SENSING MEANS FOR DETERMINING THE INTERFERENCE MODIFIED COMBINED PRINTING MEMBER-FORM THICKNESS ON THE SUPPORT SURFACE, AND GIVING AN INDICATION THEREOF; AND LOCK MEANS AND HOLDING THE THE INDICATION GIVEN BY SAID SENSING MEANS TERMINATING THE LOWERING ACTION OF SAID LOWERING MEANS AND HOLDING THE SAME AT THE POINT WHERE THE PLATEN IS AT THE INTERFERENCE SAID SUPPORT SURFACE CORRESPONDING TO THE INTERFERENCE MODIFIED COMBINED PRINTING MEMBER-FORM THICKNESS DURING MOVEMENT OF THE PLATEN TO THE ACTUATED POSITION.