Teaching aid

Claim 1

AN EDUCATIONAL DEVICE COMPRISING A HOUSING, A PROGRAM ROLL HAVING QUESTIONS AND ANSWERS IN SERIAL ARRANGEMENT THEREON, A FIRST GUIDE MEANS FOR SAID PROGRAM ROLL, CONTINUOUS ANSWER BELT MEANS UPON WHICH ANSWERS TO QUESTIONS ON SAID PROGRAM ROLL CAN BE WRITTEN, A SECOND GUIDE MEANS FOR SAID CONTINUOUS ANSWER BELT MEANS, OPERATING MEANS FOR MOVING SAID PROGRAM ROLL OVER SAID FIRST GUIDE MEANS, SAID FIRST GUIDE MEANS AND SAID SECOND GUIDE MEANS BEING OPERATIVELY INTER-CONNECTED WHEREBY SAID OPERATING MEANS AS IT MOVES SAID PROGRAM ROLL OVER SAID FIRST GUIDE MEANS SIMULTANEOUSLY MOVES SAID ANSWER BELT MEANS OVER SAID SECOND GUIDE MEANS, A FIRST WINDOW OPENING SAID HOUSING TO SERIALLY EXPOSE QUESTIONS AND ANSWERS ON SAID PROGRAM ROLL, A SECOND WINDOW OPENING IN SAID HOUSING THROUGH WHICH ANSWERS TO QUESTIONS APPEARING ON SAID PROGRAM ROLL CAN BE WRITTEN ON SAID ANSWER BELT MEANS AND COMPARED FOR CORRECTNESS, AND ERASURE MEANS ON SAID SECOND GUIDE MEANS INTERMEDIATE SAID SECOND WINDOW FOR ERASING ANSWERS WRITTEN ON SAID ANSWER BELT MEANS THROUGH SAID SECOND WINDOW, SAID ANSWER BELT MEANS INCLUDING A COMPOSITE BELT COMPRISED OF A FIRST SHEET HAVING A NON-DRYING, LIGHT-TACK, COLOURED ADHESIVE COATING AND A TRANSLUCENT WRITING SCREEN, SAID FIRST SHEET BEING ADAPTED TO ADHERE TO SAID WRITING SCREEN WHERE THE TWO LAYERS ARE IN OVERLYING RELATION TO EACH OTHER AND WHERE SCRIBING PRESSURE IS APPLIED TO THE SCREEN, SAID COLOURED ADHESIVE BEING VISIBLE THROUGH SAID SCREEN WHERE IT IS CAUSED TO ADHERE TO SAID SCREEN WHEREBY ONE CAN MAKE A SCRIBED LINE VISIBLE THROUGH SAID SCREEN, SAID SCREEN BEING ADAPTED TO BREAK ADHESIVE CONTACT WITH SAID FIRST SHEET WHEREBY TO ERASE SAID SCRIBED LINE FROM VIEW THROUGH SAID SCREEN AND IN WHICH SAID ERASURE MEANS COMPRISES MEANS FOR TEMPORARILY SEPARATING SAID FIRST SHEET AND SAID SCREEN TO BREAK ANY ADHESIVE CONTACT THAT MAY EXIST BETWEN THEM AND ERASE ANY SCRIBED LINES APPARENT FROM SUCH ADHESIVE CONTACT.