Apparatus for scanning indicia traces on record medium

Claim 1

FOR USE IN APPARATUS HAVING A SCANNING SLIT FOR SCANNING A SERIES OF ELONGATED INDICIA TRACES RECORDED ON A RECORD MEDIUM AND DISPOSED IN A ROW THEREON EXTENDING IN A DIRECTION TRANSVERSELY OF THE TRACES, AND HAVING DRIVING MEANS SERVING TO FEED THE RECORD MEDIUM IN THE DIRECTION OF THE ROW SO AS TO CARRY EACH OF SAID TRACES INTO PARALLEL COINCIDENCE WITH A SCANNING PLANE NORMAL TO THE RECORD MEDIUM AND PASSING THROUGH THE SLIT PARALLEL TO THE AXIS THEREOF, AN ATTACHMENT APPARATUS FOR ESTABLISHING PRECISE PARALLELISM BETWEEN SAID TRACES AND SAID SCANNING PLANE COMPRISING A SUPPORT PLATE ADAPTED TO CARRY THE RECORD MEDIUM FIXED THEREWITH, A GUIDE BAR CARRYING SAID SUPPORT PLATE, SAID BAR BEING ADAPTED TO BE ENGAGED BY THE DRIVING MEANS AND ADVANCED IN THE DIRECTION OF SAID ROW TO MOVE THE PLATE AND THE MEDIUM IN SAID DIRECTION, SAID SUPPORT PLATE BEING PIVOTABLE WITH RESPECT TO SAID GUIDE BAR TO PIVOT SAID MEDIUM ABOUT AN AXIS NORMAL THERETO AND PARALLEL SPACED FROM SAID PLANE, MEANS SERVING TO INFINITESIMALLY PIVOT SAID SUPPORT PLATE THROUGH A PREDETERMINED ANGLE TO VARY THE ANGLE BETWEEN THE AXES OF SAID TRACES AND SAID PLANE, MEANS FOR VARYING THE POSITION OF THE MEDIUM IN A DIRECTION PARALLEL TO SAID PLANE TO REGISTER THE MID-POINT OF THE TRACES WITH RESPECT TO THE ENDS OF THE SLIT, A REGISTRATION SURFACE GENERALLY PARALLEL TO SAID PLANE, THE LAST NAMED MEANS SERVING TO CONVERT AN APPLIED MOVEMENT ENTAILING SUBSTANTIAL LOST MOTION TO A MOVEMENT VIRTUALLY FREE OF LOST MOTION WHILE CAMMING SAID MEDIUM CONTINUOUSLY INTO A GUIDING RELATIONSHIP TO SAID REGISTRATION SURFACE.