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FILM COOLING BY EVAPORATION

IP.com Disclosure Number: IPCOM000023046D
Original Publication Date: 1976-Jul-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

One problem experienced in all present day film projectors is that of heat damage to the film, This disclosure relates to a method for reducing and/or eliminating heat damage to films by employing a projector having a film gate built around two manifolds which act to bathe the film being illu- minated by an ionized fog of water vapor. The fog of water vapor is directed across the film gate on both sides of the film and the water droplets that are charged negatively will impinge the positively charged film as it enters the gate, The heat that is generated by absorption from the light beams will heat the water droplets and cool the film surface by evaporation.