Marking mechanism for use with sheet material

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, MARKING MEANS FOR MARKNG ON SHEET MATERIAL ADVANCED RELATIVE THERETO AND MOVABLE PERIODICALLY BETWEEN ACTIVE AND INACTIVE POSITIONS INTO AND OUT OF ENGAGEMENT WITH THE SHEET MATERIAL, RESPECTIVELY, MEANS SUPPORTING SAID MARKING MEANS FOR MOVEMENT BETWEEN SAID ACTIVE AND INACTIVE POSITIONS, OPERATING MEANS CONNECTED TO SAID MARKING MEANS FOR MOVE SAID MARKING MEANS BETWEEN ITS SAID POSITIONS AND INCLUDING A MEMBER MOVABLE BETWEEN FIRST AND SECOND POSITIONS FOR EFFECTING MOVEMENT OF SAID MARKING MEANS BETWEEN SAID INACTIVE AND ACTIVE POSITIONS, A LATCH PART OPERATIVELY ASSOCIATED WITH SAID MEMBER AND ENGAGEABLE THEREWITH TO RELEASABLY HOLD SAID MEMBER IN ITS FIRST AND SECOND POSITIONS, FIRST AND SECOND TRIP MEANS MOVABLE IN TIMED RELATIONSHIP TO THE ADVANCE OF SAID MATERIAL AND OPERATIVELY CONNECTED TO SAID MEMBER TO FORCE SAID MEMBER FROM SAID FIRST POSITION TO SAID SECOND POSITION AND FROM SAID SECOND POSITION TO SAID FIRST POSITION, RESPECTIVELY, AND MEANS FOR CHANGING THE TIME OF OPERATION OF ONE OF SAID FIRST AND SECOND TRIP MEANS RELATIVE TO THE OTHER, SAID LATCH PART COMPRISING A HOOKLIKE PART CONNECTED TO SAID HOOK-LIKE PART INCLUDES A PAIR MENT THEREWITH, AND SAID HOOK-LIKE PART INCLUDES A PAIR OF RECESSES FOR RECEIVING A PORTION OF SAID MEMBER WHEN SAID MEMBER IS IN ITS FIRST AND SECOND POSITION, RESPECTIVELY, AND WHEREIN SAID DEVICE FURTHER INCLUDES SPRING MEANS BIASING SAID HOOK-LIKE PART INTO ENGAGEMENT WITH SAID PORTION OF SAID MEMBER AND FRICTIONALLY HOLDS SAID MEMBER IN THE RECESSES.