or more than 62 fins the fin configuration of the apparatus 510 simplifies construction of the apparatus and allows for simple modifications by pressing only the desired number of fins onto the tubular bodies 514 moreover although the fins may incorporate four heat transfer devices 513 not all of the assemblies need be incorporated or activated in the illustrated embodiment the heating elements 525 are in direct contact with the tubular bodies 513 so that the bodies are heated by conduction thermal grease may be applied between the heating elements and the inside of the tubular bodies to enhance the conduction path it will be appreciated that various of the above described features and functions as well as other features and functions or alternatives thereof may be desirably combined into many other different systems or applications various presently unforeseen or unanticipated alternatives modifications variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims for example the fin 512 of the fin array 511 described herein are constructed as generally rectangular flat plates however the configuration of the plates may vary according to space considerations within the particular printing machine thus the fins may be curved or incorporate a zig zag configuration provided the plates in the array are generally parallel with proper spacing moreover the plates within a given array may have different configurations to help ensure a uniform temperature across the surface 541 or more particularly across the portion of the surface onto which the phase change pellets are dispensed likewise the heat transfer devices 513 may be modified provided they are capable of heating the fin array 511 to a proper.