IMPROVEMENTS RELATING TO HEATING UNITS

摘要

A heating unit comprises a heat conductive block (3) with cooling fins (4). Grooves (6) are formed in the one face of the block (3) and these receive correspondingly shaped heating elements (7) whose outer faces are flush with the face of the block (3). Because the heating elements are situated directly on the face of the block desired heating effects can be readily achieved in extruded blocks which can adopt quite detailed design shapes.