Disposable protective film accessory for the lens of a respirator hood

摘要

A disposable protective film accessory for use with a hood assembly including an optically transparent lens panel. The accessory includes an elongated sheet of thin, flexible transparent film having a length many times the length of the lens panel and a width which is at least a substantial portion of the width of the lens panel. The sheet of film is tightly rolled about an axis normal to the length thereof. The roll of film is loosely contained in a housing comprising an open sided cavity which is mounted on the exterior surface of the lens panel at one end thereof with the open side of the cavity against the lens panel. A tensioning bar member is mounted across the other end of the lens panel in contact with the exterior surface thereof. The free end of the protective film is pulled out of the cavity between the housing and the lens panel, across the exterior surface of the lens panel and between the lens panel and the tensioning bar member. The edge of the sheet of protective film projecting beyond the tensioning bar member is slit to promote the tearing of the free end of the sheet of protective film by a twisting movement thereof against the tensioning bar member to enable the removal of contaminated portion of the film for disposal.