Apparatus for stenciling oval articles

Claim 1

APPARATUS FOR STENCILLING ANY PORTION OF THE CONVEX PERIPHERAL SURFACE OF AN OVAL ARTICLE HAVING A VARYING RADIUS OF SURFACE CURVATURE, SAID APPARATUS COMPRISING, IN COMBINATION; STENCILLING MEANS INCLUDING A FRAME ADAPTED TO SUPPORT A STENCIL SCREEN AND MOUNTED FOR RECIPROCATION IN A FIXED PATH; MOTIVE MEANS FOR DRIVING SAID FRAME RECIPROCALLY; A CARRIAGE INCLUDING A CARRIER MOUNTED THEREON FOR FREEDOM OF MOVEMENT IN A DIRECTION NORMAL TO THE PATH OF SAID FRAME; A DRIVE SHAFT SUPPORTED ROTATABLY IN SAID CARRIER FOR MOVEMENT THEREWITH; ROTATABLE CHUCK MEANS MOUNTED ON SAID DRIVE SHAFT FOR SUPPORTING ON OVAL ARTICLE IN A PREDETERMINED ANGUALAR RELATION TO SAID CHUCK MEANS; MEANS RESILIENTLY BIASING SAID CARRIER TOWARD SAID FRAME; A RACK CONFORMING TO SAID FIXED PATH OF RECIPROCATION AND DRIVINGLY CONNECTED WITH SAID FRAME FOR MOVEMENT THEREWITH; A FULL OVERAL GEAR WHOSE PITCH OVAL HAS A VARYING RADIUS OF CURVATURE SUBSTANTIALLY CONFORMING TO THE SURFACE OUTLINE OF AN OVAL ARTICLE TO BE STENCILED, SAID GEAR BEING AFFIXED TO SAID DRIVE SHAFT IN ANGULAR COINCIDENCE WITH SAID CHURCH MEANS AND BEING MESHED WITH SAID RACK FOR ROTATIONALLY DRIVING SAID DRIVE SHAFT AND SAID CHUCK MEANS IN SYNCHRONIZED RESPONSE TO RECIPROCATION OF SAID FRAME BY SAID MOTIVE MEANS, AND TO DRIVE SAID CARRIER TRANSVERSELY TO SAID FIXED PATH OF SAID FRAME TO MAINTAIN UNIFORM ENAGAGEMENT BETWEEN SAID ARTICLE AND A SCREEN MOUNTED IN SAID FRAME AS SURFACE PORTIONS OF SAID ARTICLE OF CHANGING RADIUS ENGAGE SAID SCREEN; THEREBY TO IMPART A LINEAR SURFACE VELOCITY TO AN ARTICLE SUPPORTED IN SAID CHUCK MEANS WHICH IS EQUAL TO THE LINEAR VELOCITY OF SAID FRAME BY ROTATING SAID ARTICLE WITH AN ANGULAR VELOCITY WHICH IS INVERSELY PROPORTIONAL TO THE VARYING LOCAL RADIUS OF CURVATURE OF SAID ARTICLE.