frame heater

frame heater

A device used to warm plastic spectacle frames in order to soften its material sufficiently to allow insertion of lenses and/or adjustment. Some frame heaters warm air, which is directed to the area of the frame that is to be altered. Others heat salt or glass beads to a given temperature and the part of the frame that is to be altered is placed into the heated material. Syn. frame warmer. See plastic spectacle frame.
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I'm sure I'm not alone in being defeated, after an age spent at the frame heater, by the impossible task of attempting to reduce the length to bend of a thick side.
Minimal gasket frost buildup is achieved with the Halo bypass coil frame heater.
That's why in many commercial freezer installations, the doors and frames are heated by internal frame heaters that operate 24/7 to prevent excessive condensation buildup.
An exterior mounted door frame sensor modulates the door and frame heaters as needed.