Plunger mechanism for an I.S. machine

A plunger mechanism for an I.S. machine comprising

• a permanent plunger distribution base having a top surface and including a plurality of sets of service conduits, each set including plunger up, plunger down, and counterblow/vacuum or cooling service conduits for one plunger cylinder, each plunger distribution base service conduit having an outlet port communicating with said top surface,
• a selected number, up to the number of said sets of service conduits, of vertically extending cylindrical plunger cylinders each having a bottom surface and including a corresponding set of service conduits including plunger up, plunger down, and counterblow/vacuum or cooling service conduits, with each of said service conduits in a plunger cylinder having an inlet port communicating with the bottom surface of the plunger cylinder,
• a transition plate having a bottom surface for engaging said top surface of said plunger distribution base and a top surface, said transition plate having a number, equal to the number of plunger cylinders, of sets of service conduits, each set including plunger up, plunger down, counterblow/vacuum or cooling service conduits for one of the plunger cylinders,
• each of said sets of service conduits in said transition plate having inlet ports in the transition plate bottom surface for communicating with corresponding outlet ports of one of said sets of service conduits in said plunger distribution base and having outlet ports in the transition plate top surface selectively located to communicating with corresponding inlet ports of one of the plunger cylinders positioned on the transition plate.