Sealing strip comprising rubber base coated with rubbery cement containing silicone gum

Claim 1

A SELAING STRIP ADAPTED TO SEAL A CLOSURE MEMBER TO A FRAME MEMBER AND TO BE CARRIED BY ONE OF SAID MEMBERS, SAID SEALING STRIP BEING FLEXED UPON EACH OPENING AND CLOSING MOVEMENT OF THE CLOSURE MEMBER AND CONSISTING ESSENTIALLY OF A RUBBERY BASE TAKEN FROM THE CLASS CONSISTING OF NATURAL RUBBER AND POLYCHLOROPRENE, A COEXTENSIVE SLIP COAT COVERING THE ENTIRE EXTERNAL SURFACE OF SAID BASE, SAID SLIP COAT CONSISTING ESSENTIALLY OF AN INITIALLY FLUID RUBBERY CEMENT WHICH INCLUDES A DEVOLATILIZED METHYL VINYL SILICONE GUM HAVING A VERY HIGH MOLECULAR WEIGHT OF ABOUT 200,000 AND CONTAINING ABOUT .2 MOL PERCENT OF A VINYL GROUP THEREIN IN QUANTITIES OF ABOUT 20% BY WEIGHT OF THE RUBBERY INGREDIENTS IN THE CEMENT AND DISPERSED THROUGHOUT THE SLIP COAT IN AN UNCURED CONDITION AND ADAPTED TO BLEED TO THE SURFACE THEREOF FOR ENHANCING THE LUBRICATING QUALITIES OF THE SLIP COAT.