upper end of the coupling 29 is connected to a hose 30 which extends to the outlet of an air blower 31 the blower 31 is driven by a motor 32 and draws air in through a heater 33 the heater 33 may typically be a 34 series 68 34 athena flameless torch made by the athena company of plymouth meeting pa the heater 33 has its temperature controlled by a control box 34 that is connected to a temperature sensing device 35 such as a thermocouple that is in contact with the gravure roll thus it can be seen that heated air will be delivered to the interior of the gravure roll 10 through the hose 30 the controller may be a 34 watlow controller 34 the heated air that enters from the top of the gravure roll will pass down into the interior of the roll 10 and be deflected toward the inner surface by a cover plate 36 that overlies a distributor 37 the distributor 37 is in the form of a circular disk or bottom closing member 38 shown in perspective in fig4 a plurality of circumferentially spaced apart semi cylindrical passages 39 are formed in the outer surface of said member 38 these passages 39 do not extend through the bottom of the member 38 but communicate adjacent their lower ends with a series of horizontal passages 40 which have their inner ends terminating in a series of vertical passages 41 the vertical passages 41 extend upward through the top of the disk or member 38 the cover plate 36 is mounted on the disk 38 but is spaced from the upper surface so as to confine heated air to an area above the passages 41 a central.