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I December, 1937 • American Cinematographer 519 WALTER BELL COMPLETES 8mm. REVERSAL MACHINE Mr. Bell demonstrated these features by deliberately stopping the film at the drying cabinet while the machine was still in motion, thus throwing a surplus of loose film in the machine. Immediately this slack would be transmitted through the machine to the feed-in reel, which would stop long enough to take it up, following which the tension again would be normal throughout the entire mechanism. The builder likewise demonstrated that by even putting excessive drag on the film at the feed-in end it would not tighten up the film in the machine at any point other than the first loop or so over the immediate rollers at the feed-in end. This machine, like previous 16mm. models he has built, drives the film by means of the bottom rollers. At no place throughout the entire ma- chine does the emulsion side of the film come in contact with any surface. The total thread-up is approx- At left, upper, showing the top rollers and main line drive shaft in the developing end of the machine. Lower, view shows five of the ten tiers of bottom rollers lifted from the developing tanks. At right, upper, showing front view of the dry- ing cabinet with glass doors removed. Lower, showing rollers which take finished film from dry box and take up reel that receives film. I N a recent article we described an automatic machine for the proc- essing of 16mm. reversible ama- teur film which was designed and built for a local laboratory. We have just had an opportunity to see in actual demonstration another machine built on the same principle, and by Walter W. Bell, the same man, but for use in processing stiaight 8mm. revers- ible film. This machine we predict will be the forerunner of many more machines that will take their place in the small and large laboratories of the country for the mechanical processing of this new and popular sized amateur film. The entire unit is compact, taking up a space less than ten feet in length by 15 inches in width. It is so con- structed that all accessories are an integral part of the machine and with the developing tanks and drying cab- inet are mounted on one frame. Due to the extreme narrow width of this type film it has been considered nearly an impossibility to design a machine that would handle this size film through all the solutions that are necessary for the reversing of ama- teur film without breakage, but appar- ently Designer Bell has overcome this stumbling block. At a demonstration given the editor it was shown the machine is fully capable of running film through with- out tension at any point and also that it is fully capable of compen- sating for automatic stretch and shrink to which the film is subjected during processing and drying. Builder Demonstrates imately 850 feet of film and the ma- chine will accomodate 2000 foot feed- in and receiving reels for the fin- ished film. It has a capacity com- pletely to process, polish and dry 1200 feet of 8mm. film an hour and one or more machines can be operated by one man, since all the attention neces- sary is to change film reels every 2000 feet, which may be done without in- terruption of operation. The entire mechanism in the devel-