Paper feed mechanism for graphic communication recording devices

Claim 1

A PAPER FEED MECHANISM FOR A GRAPHIC COMMUNICATION RECORDING DEVICE OF THE KIND IN WHICH DATA ARE RECORDED BY A STYLUS MOVING ACROSS A PORTION OF A PAPER WEB OR OTHER RECORDING MEDIUM SUPPORTED ON A PLATEN, COMPRISING: A PAIR OF DRIVE BELTS; SPROCKET MEANS FOR MOUNTING THE DRIVE BELTS ON OPPOSITE SIDES OF THE PLATEN IN SPACED PARALLEL RELATION TO EACH OTHER; GUIDE MEANS FOR HOLDING THE EDGES OF THE WEB IN CONTACT WITH THE DRIVE BELTS, SAID GUIDE MEANS INCLUDING A PAIR OF GUIDE LEG MEMBERS EACH MOUNTED ADJACENT A RESPECTIVE ONE OF THE DRIVE BELTS AND EACH MOVABLE BETWEEN A RELEASED POSITION DISPLACED FROM THE ASSOCIATED DRIVE BELT AND AN ENGAGED POSITION IN WHICH THE GUIDE LEG MEMBER BEARS UPON THE EDGE OF THE WEB AND URGES IT INTO CONTACT WITH THE BELT; LATCHING MEANS COMPRISING TWO INDIVIDUAL LATCH DEVICES FOR LATCHING THE RESPECTIVE GUIDE LEG MEMBERS IN THEIR RESPECTIVE ENGAGED POSITIONS, HOLDING THE WEB FLAT AGAINST THE PLATEN, SAID LATCHING MEANS FURTHER INCLUDING RESILIENT BIASING MEANS COMMON TO BOTH LATCHES FOR EQUALIZING THE HOLDING FORCES APPLIED TO THE OPPOSITE EDGES OF THE WEB; AND DRIVE MEANS FOR DRIVING THE BELTS SIMULTANEOUSLY TO ADVANCE THE WEB, WHILE ENGAGED BETWEEN THE GUIDE MEANS AND THE DRIVE BELTS, ACROSS THE PLATEN.