Industrial smoothing iron installation - has temp. regulator remote from iron making possible use of electronic circuits

摘要

The temp. detector positioned in the sole plate of an industrial smoothing iron consists of an NTC resistance, and is connected to a temp. regulating device arranged completely separately from the iron and connected to the power supply. The iron has a steam supply controlled by an electromagnetic valve via a microswitch in the iron handle, which is aligned parallel to the sole plate. The surface of the sole plate is given a micropore coating by a thermal atomising process. The edges of the sole plate are protected by a hard trim of aluminium oxide, and the whole is surfaced with PTFE. Problems arising in industrial irons from the use of bimetallic thermostats and their hysteresis, together with the relatively large heating power which has to be controlled, and the much higher frequency of use are overcome and the life time of the iron is extended.