Method for making bowling balls

Claim 1

A METHOD OF MAKING A BOWLING BALL COMPRISING THE STEPS OF: (A) PLACING A PRE-DETERMINED QUANTITY OF SELF-POLYMERIZING SYNTHETIC RESIN IN THE BOTTOM OF A HOLLOW SPERICAL CORE MOLD TO FORM A HARD SEGMENT OF A SPHERE; (B) FILLING THE REMAINDER OF SAID HOLLOW SPHERICAL CORE MOLD WITH A FLUID MIXTURE OF A SYNTHETIC RESIN AND A DENSITY CONTROL MEDIUM, AT LEAST A SUBSTANTIAL PORTION OF WHICH IS COMPOSED OF HOLLOW SYNTHETIC RESIN PARTICLES; (C) CAUSING SAID MIXTURE TO POLYMERIZE AND INTEGRALLY BOND TO SAID SEGMENT TO FORM A HARDENED SUBSTANTIALLY SPHERICAL CORE IN SAID CORE MOLD; (D) REMOVABLY AFFIXING SAID CORE IN A HOLLOW SHELL MOLD HAVING A SPHERICAL ARTICLE-FORMING SURFACE SUBSTANTIALLY CONCENTRICALLY SPACED WITH RESPECT TO SAID CORE TO DEFINE A SHELL-FORMING SPACE, SAID SHELL MOLD HAVING A TOP-FILLING OPENING; (E) FILLING SAID SHELL-FORMING SPACE WITH SYNTHETIC RESIN THROUGH SAID FILLING OPENING; (F) SAID SHELL MOLD BEING PROPORTIONED TO PROVIDE A SLIGHT EXCESS OF SAID SYNTHETIC RESIN SHELL MATERIAL NOT PROTRUDING SUBSTANTIALLY OUTWARDLY BEYOND SAID SPHERICAL ARTICLE-FORMING SURFACE AND BEING OF BROAD LATERAL EXTENT GREATER THAN SAID FILLING OPENING TO PROVIDE SLIGHT BUMP ON THE UPPER PORTION OF THE SAME SUFFICIENT TO COMPENSATE FOR SETTING OF SAID SHELL MATERIAL-TENDING TO BE CAUSED IN THE AREA OF SAID FILLING OPENING BY UPWARD MIGRATION AND VENTING OF AIR BUBBLES THROUGH SAID SHELL MATERIAL IN SAID AREA DURING POLYMERIZATION OF SAID SHELL MATERIAL; (G) CAUSING SAID SHELL MATERIAL TO POLYMERIZE AND INTEGRALLY BOND TO SAID CORE; (H) REMOVING THE RESULTANT BALL FROM SAID SHELL MOLD; AND (I) REDUCING SAID BALL TO PRE-DETERMINED FINISHED SPHERICAL SIZE.

Claim 2

A METHOD OF MAKING A BOWLING BALL COMPRISING THE STEPS OF: (A) PLACING A PRE-DETERMINED QUANTITY OF SELF-POLYMERIZING SYNTHETIC RESIN IN THE BOTTOM OF A HOLLOW SPERICAL CORE MOLD TO FORM A HARD SEGMENT OF A SPHERE; (B) FILLING THE REMAINDER OF SAID HOLLOW SPHERICAL CORE MOLD WITH A FLUID MIXTURE OF A SYNTHETIC RESIN AND A DENSITY CONTROL MEDIUM, AT LEAST A SUBSTANTIAL PORTION OF WHICH IS COMPOSED OF HOLLOW SYNTHETIC RESIN PARTICLES; (C) CAUSING SAID MIXTURE TO POLYMERIZE AND INTEGRALLY BOND TO SAID SEGMENT TO FORM A HARDENED SUBSTANTIALLY SPHERICAL CORE IN SAID CORE MOLD; (D) REMOVABLY AFFIXING SAID CORE IN A HOLLOW SHELL MOLD HAVING A SPHERICAL ARTICLE-FORMING SURFACE SUBSTANTIALLY CONCENTRICALLY SPACED WITH RESPECT TO SAID CORE TO DEFINE A SHELL-FORMING SPACE, SAID SHELL MOLD HAVING A TOP-FILLING OPENING; (E) FILLING SAID SHELL-FORMING SPACE WITH SYNTHETIC RESIN THROUGH SAID FILLING OPENING; (F) SAID SHELL MOLD BEING PROPORTIONED TO PROVIDE A SLIGHT EXCESS OF SAID SYNTHETIC RESIN SHELL MATERIAL NOT PROTRUDING SUBSTANTIALLY OUTWARDLY BEYOND SAID SPHERICAL ARTICLE-FORMING SURFACE AND BEING OF BROAD LATERAL EXTENT GREATER THAN SAID FILLING OPENING TO PROVIDE SLIGHT BUMP ON THE UPPER PORTION OF THE SAME SUFFICIENT TO COMPENSATE FOR SETTING OF SAID SHELL MATERIAL-TENDING TO BE CAUSED IN THE AREA OF SAID FILLING OPENING BY UPWARD MIGRATION AND VENTING OF AIR BUBBLES THROUGH SAID SHELL MATERIAL IN SAID AREA DURING POLYMERIZATION OF SAID SHELL MATERIAL; (G) CAUSING SAID SHELL MATERIAL TO POLYMERIZE AND INTEGRALLY BOND TO SAID CORE; (H) REMOVING THE RESULTANT BALL FROM SAID SHELL MOLD; AND (I) REDUCING SAID BALL TO PRE-DETERMINED FINISHED SPHERICAL SIZE.