conical shape however in some embodiments the flat disk section 20 may use a convex or concave arch to provide pressure integrity the separator ring 22 is a portion of the cap 14 that is defined by a structurally weakened or reduced strength zone 24 that allows the disk section 20 to separate from the cap 14 when the explosives not shown inside the case 12 are detonated a variety of mechanisms may be used to form the separator ring 22 in embodiments where the cap 14 is a single integral body for example a groove may be formed into the cap 14 alternatively as shown a fold may be formed into the cap 14 the fold or groove may be u201c v u201d shaped u201c u u201d shaped sinusoidal a square shape a rectangular or any other shape having curved or straight sides that are suited for weakening the zone 24 in other embodiments the separator ring 22 may have a reduced wall thickness section formed while the cap 14 is manufactured in still other embodiments the material at the separator ring 22 may be treated chemically to reduce strength in yet other embodiments the cap 14 may be an assembly of two or more discrete components e g the disk section 20 may be a separate element referring to fig3 there is shown a portion of a perforating tool 40 disposed in a wellbore 42 the perforating tool 40 includes a shaped charge 10.