Printing device construction

Claim 1

A PRINTER FOR ATTACHMENT TO A POWER DRIVEN MACHINE COMPRISING: AN ELONGATED FRAME; A DRIVE SHAFT ADAPTED TO BE CONNECTED TO A SOURCE OF ROTATIONAL POWER; A PRINTING HEAD MOUNTED FOR RECIPROCATING MOVEMENT RELATIVE TO SAID FRAME AND PROVIDED WITH A TYPE ELEMENT AT ONE END OF THE HEAD; CRANK MEANS ACTUATED BY ROTATION OF THE SHAFT FOR MOVING THE HEAD TO CYCLICALLY FORCE THE TYPE ELEMENT INTO EXTENDED PRINTING POSITION AND TO RETRACT THE ELEMENT; A SUPPLY ROLL OF PIGMENTED TAPE ROTATABLY MOUNTED ON A HUB; A TAKEUP SPOOL ASSEMBLY ADJACENT AND COAXIAL WITH SAID HUB INCLUDING A FLANGE DETACHABLY CARRIED ADJACENT SAID HUB FOR RETAINING SAID ROLL ON THE HUB; TRANSPORT MEANS FOR PERIODICALLY MOVING THE TAPE IN TIMED RELATION WITH RETRACTING MOVEMENT OF THE PRINTING HEAD; GUIDE MEANS FOR GUIDING THE TAPE FROM THE SUPPLY ROLL ON THE HUB, ACROSS THE FACE OF THE TYPE ELEMENT, INTO ENGAGEMENT WITH THE TRANSPORT MEANS AND ONTO THE TAKEUP SPOOL; AND MEANS ACTUATED BY THE DRIVE SHAFT FOR CONSTANTLY FRICTIONALLY URGING THE TAKEUP SPOOL TO WIND TAPE THEREON.