Core box seal strip

Claim 1

A SEALING STRUCTURE FOR A PAIR OF MATING CORE BOX SECTIONS COMPRISING, IN COMBINATION, A FIRST CORE BOX SECTION HAVING A PARTING LINE SURFACE THEREON, A SECOND CORE BOX SECTION HAVING A MATCHING PARTING LINE SURFACE THEREON FOR ABUTTING SURFACE TO SURFACE CONTACT WITH THE CORRESPONDING SURFACE OF SAID FIRST SECTION, ONE OF SAID SECTIONS HAVING A GROOVE FORMED INTO ITS PARTING LINE SURFACE TO PROVIDE A CAVITY LOCATED ENTIRELY TO ONE SIDE OF SAID PARTING LINE DIVISION BETWEEN SAID SECTIONS WITH THE PARTING LINE SURFACE OF THE OTHER SECTION PROVIDING THE CLOSURE MEANS FOR THE GROOVE ALONG THE COMMON PARTING PLANE OF SAID CORE BOX SECTIONS, AND A RESILIENT DEFORMABLE SEAL STRIP TIGHTLY SECURED INTO SAID GROOVE COMPRISING A HOLLOW BASE PORTION NORMALLY FILLING SAID GROOVE UNDER UNDEFORMED CONDITIONS PROVIDED WITH AN EXTERIOR SURFACE SHAPED TO FOLLOW THE CONTOUR OF SAID GROOVE, SAID STRIP HAVING A CONVEX CROWN PORTION NORMALLY EXTENDING BEYOND SAID GROOVE OVER THE ENTIRE WIDTH OF SAID GROOVE UNDER UNDERFORMED CONDITIONS, FOR DIRECT SURFACE CONTACT WITH THE OUTER PARTING LINE SURFACE OF THE MATCHING SECTION TO INDUCE GROOVE BODY DEFORMATION BY THE EXPOSED BOWED FACE THEREOF AND ACROSS THE GROOVE WIDTH BY SAID MATCHING SECTION, SAID GROOVE HAVING A CROSS SECTIONAL AREA AT LEAST AS GREAT AS THAT OF SAID SEAL STRIP AND THE EDGE OF THE CONVEX CROWN PORTION OF SAID SEAL EXTENDING IN THE SAME PLANE AS THE PARTING LINE SURFACE OF THE CORE BOX SECTIONS WITH SAID EDGE OF SAID STRIP BEING SUBSTANTIALLY COLINEAR WITH THE EDGE OF SAID GROOVE.