Calender.

A calender is a heated cylinder press that runs goods through roll to roll, and in decoration it is the machine that carries sublimation transfer paper and fabric through the drum together under continuous pressure. Paper and goods unwind, meet at the drum, and separate on the far side, where the spent paper rewinds and the printed fabric comes off as a finished roll, so temperature and dwell are set by drum heat and line speed rather than by an operator closing a press. It only works on polyester and polymer-coated goods, because the dye moves as a gas and needs a synthetic fiber to lodge in; cotton comes out pale and washes clean. Uneven drum temperature across the working width is the failure that hurts, because it stripes a color shift down a whole roll before anyone at the cutting table sees a finished panel.