Color television display device

Claim 1

COLOR TELEVISION DISPLAY APPARATUS COMPRISING A CATHODE-RAY TUBE HAVING A TARGET AREA, SCANNING MEANS ASSOCIATED WITH SAID TUBE TO SCAN SAID TARGET AREA SUCCESSIVELY AND CYCLICLY, A COLOR MASK INTERPOSED IN A LIGHT PATH WHICH INCLUDES THE TARGET AREA OF SAID TUBE, A FIRST RIGID MEMBER OF SAID MASK HAVING A PLURALITY OF COLOR FILTER STRIAE ARRANGED IN CONSISTENT SUCCESSION, A SECOND FLEXIBLE MEMBER AT LEAST CO-EXTENSIVE WITH SAID FIRST MEMBER AND HAVING ALTERNATE OPAQUE AND LIGHT-TRANSMITTING STRIAE, A THIRD RIGID LIGHT-TRANSMITTING MEMBER FIXEDLY POSITIONED RELATIVE TO SAID FIRST MEMBER AND APPROXIMATELY CO-EXTENSIVE THEREWITH, MEANS TO MAINTAIN A CONSTANT ANGULAR RELATION BETWEEN STRIAE ON SAID FIRST MEMBER AND SAID SECOND MEMBER, AND DRIVING MEANS TO CAUSE MOVEMENT OF SAID SECOND MEMBER IN THE SPACE BETWEEN SAID FIRST MEMBER AND SAID THIRD MEMBER FOR BRINGING THE COLOR FILTER STRIAE OF SAID FIRST MEMBER SUCCESSIVELY IN REGISTER WITH THE LIGHTTRANSMITTING STRIAE OF SAID SECOND-NAMED MEMBER, THE SPACING BETWEEN SAID FLEXIBLE MEMBER AND SAID RIGID MEMBERS BEING SUCH AS TO PROVIDE FRICTIONLESS CAPTIVATION OF SAID FLEXIBLE MEMBER BY SAID RIGID MEMBERS OVER AT LEAST THE MAJOR PORTION OF ITS AREA.