Photographic Film Dryer.
Use a 32 gallon galvanized garbage can and you have the main part of this efficient controlled-heat film dryer.
It will acommodate up to twenty-four 4X5 cut films or several lengths of roll film, and the novel heating element, plus the filtered air flow, together provide a constant circulation of warm air.
Four pages ( 3 sheets - front on the first and third sheet and front and back on second sheet. ) B & W photos, illustrations, expanded view and instructional narrative.
My plans are from original source materials such as books, magazines and other publications and the pages are carefully removed.