what may be termed a low - boy machine is provided with a side - positioned air - supplying blowing chamber , an air heating and upwardly and directing chamber - defining base part , a centrally disposed upright support post or column , an upright steam burst and heat - applying pipe assembly , an upper platform frame on the column that carries cap - finishing means , and a non - permeable bag positioned to extend upwardly between the base part and the upper frame to define a fluid - directing and mixing chamber for supplying steam and hot air to the cap - finishing means . the cap - finishing means has a pair of perforated cap - receiving and stretching parts through which steam and heated air is supplied to the inside of a fabric cap to be finished . the pair of parts have means for relatively moving them towards and away from each other to release and stretch a cap that is positioned thereon .