Photographic roll paper holder

Claim 1

A PHOTO-REPRODUCTION APPARATUS COMPRISING IN COMBINATION WITH A SENSITIZED STRIP, AND A LIGHT SOURCE AND LENS SYSTEM CONSTITUTING AN EXPOSURE STATION AT WHICH IMAGES ARE PRODUCED AS SUCCESSIVE FRAMES ON SAID STRIP, MEANS ADVANCING SAID STRIP WITH A STEP-BY-STEP MOTION TO SUCCESSIVE EXPOSURE OF FRAME AREAS OF THE STRIP AT THE EXPOSURE STATION, MEANS PRECISELY MEASURING THE NEXT APPROACING FRAME DISTANCE FOLLOWING THE FRAME AT THE EXPOSURE STATION AND PREDETERMINE THEREBY THE DISTANCE FOR ADVANCEMENT OF THE STRIP, MEANS MARKING THE SAID DISTANCE ON THE STRIP AT PRECISELY A FRAME DISTANCE FROM THE FRAME BEING EXPOSED, THEREBY EXACTLY DEFINING THE LENGTH OF THE NEXT AREA TO BE EXPOSED, MEANS STOPPING THE DVANCEMENT OF SAID STRIP PRIOR TO EXPOSURE OF SAID NEXT AREA PRECISELY AT THE MARKED FRAME POSITION TO PRODUCE THE IMAGE FRAME IN EXACT POSITION ON THE STRIP AT THE EXPOSURE STATION, WHEREBY ALL FRAMES ARE OF EQUAL AND PRECISE LENGTH AT THE EXPOSURE STATION, THE SAID MARKING ON THE STRIP BEING ELECTRICALLY CONDUCTIVE AND THE MEANS ADVANCING SAID STRIP COMPRISING AN ELECTRIC MOTOR, AND SAID MEANS STOPPING ADVANCEMENT OF SAID STRIP COMPRISING AN ELECTRIC CIRCUIT ACTIVATED BY AND SUCCESSIVELY INCLUDING CONTACTS SUCCESSIVELY ENGAGED BY SAID MARKING ON THE STRIP APPLYING BOTH A BRAKING TO ROTATION OF THE MOTOR AND A SUDDEN STOPPING THEREOF AT THE SAID PRECISE MARKED POSITION.