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Microfilm camera for unusually large copy
482
C U R R E N T TOI'ICS.
l.[. t;. I.
Microfilm Camera for Unusually Large Copy.--A new revolutionary triplepurpose microfilm camera capable of photographing unusually large copy up to 42 in. in width by any length in one continuous exposure was exhibited recently at the showrooms of Diebold Incorporated, New York City. The camera, which also serves as a film printer and enlarger, is the result of years of experiment by Diebold Laboratories to broaden the application of the automatic flow principal of microphotography to include records and documents wider than the present limitation of 14 in. Its principal applications are in the microreproduction of engineering drawings, newspapers, blueprints, maps, surveys, and large production control and accounting records. Development of the new Flofilm 42-in. camera, a compact unit which resembles a home laundry mangle and is fed much the same as a blueprint printer, necessitated new engineering designs which would make possible satisfactory photographic results at higher reduction ratios. A reduction ratio of 34 times which reduces the microfilm image to less than 1/1000 the area of the original copy is made possible by inverting the camera so that copy passes over the lens instead of underneath it. The flow-type camera is capable of microfilming the longest copy in existence in one operation. A 100-ft. roll of film can take copy up to ~ of a mile in length. Through use of the enlarging feature of the camera, images can be "blown back" at reduced size, original size or larger on a single sheet or roll of paper in one printing operation. Any desired number of inexpensive contact prints can be made from the original roll of negative film. The camera when converted to a flow enlarger will print blow-ups of any desired image on photosensitive paper or cloth from the roll of negative film. Copy can be moved through the camera at two speeds of 30 or 60 ft. per minute. At the speed of 60 ft. per minute, a drawing 10 ft. long can be microfilmed at 10 sec. Through a series of five buttons on the control panel, propel" light intensity is controlled by the operator by merely touching the button offering the best lighting for any type of cop3,. Du Pont Announces New Synthetic--Orlon (Textile World, Vol. 98, No. 9). --Orlon, formerly called Fiber A, is the name given by Du Pont to the acrylic yarn it is producing in small quantities at its Waynesboro, Va., plant. Largescale production is rumored as planned for Du Pont's projected plant at Camden, S. C. Orlon is technically a polyacrylontrile fiber, commonly called acrylic, its properties place it between nylon and rayon. Work on it was begun in 1940, and for several years laboratory and pilot-plant production has been used to explore the possibilities of the new fiber in continuous-filament form. Yarn sizes from 30 to 600 den. have been produced. Filaments range from 1 to 5 den. The new fiber can be used on conventional equipment for winding, twisting, knitting, slashing, weaving, braiding, dyeing, and finishing. Some ultimate uses for Orion include: automobile tops, cordage, fish nets, laundry bags, electrical insulation, rainwear, bathing suits, curtains, window shades and awnings.
C U R R E N T TOI'ICS.
l.[. t;. I.
Microfilm Camera for Unusually Large Copy.--A new revolutionary triplepurpose microfilm camera capable of photographing unusually large copy up to 42 in. in width by any length in one continuous exposure was exhibited recently at the showrooms of Diebold Incorporated, New York City. The camera, which also serves as a film printer and enlarger, is the result of years of experiment by Diebold Laboratories to broaden the application of the automatic flow principal of microphotography to include records and documents wider than the present limitation of 14 in. Its principal applications are in the microreproduction of engineering drawings, newspapers, blueprints, maps, surveys, and large production control and accounting records. Development of the new Flofilm 42-in. camera, a compact unit which resembles a home laundry mangle and is fed much the same as a blueprint printer, necessitated new engineering designs which would make possible satisfactory photographic results at higher reduction ratios. A reduction ratio of 34 times which reduces the microfilm image to less than 1/1000 the area of the original copy is made possible by inverting the camera so that copy passes over the lens instead of underneath it. The flow-type camera is capable of microfilming the longest copy in existence in one operation. A 100-ft. roll of film can take copy up to ~ of a mile in length. Through use of the enlarging feature of the camera, images can be "blown back" at reduced size, original size or larger on a single sheet or roll of paper in one printing operation. Any desired number of inexpensive contact prints can be made from the original roll of negative film. The camera when converted to a flow enlarger will print blow-ups of any desired image on photosensitive paper or cloth from the roll of negative film. Copy can be moved through the camera at two speeds of 30 or 60 ft. per minute. At the speed of 60 ft. per minute, a drawing 10 ft. long can be microfilmed at 10 sec. Through a series of five buttons on the control panel, propel" light intensity is controlled by the operator by merely touching the button offering the best lighting for any type of cop3,. Du Pont Announces New Synthetic--Orlon (Textile World, Vol. 98, No. 9). --Orlon, formerly called Fiber A, is the name given by Du Pont to the acrylic yarn it is producing in small quantities at its Waynesboro, Va., plant. Largescale production is rumored as planned for Du Pont's projected plant at Camden, S. C. Orlon is technically a polyacrylontrile fiber, commonly called acrylic, its properties place it between nylon and rayon. Work on it was begun in 1940, and for several years laboratory and pilot-plant production has been used to explore the possibilities of the new fiber in continuous-filament form. Yarn sizes from 30 to 600 den. have been produced. Filaments range from 1 to 5 den. The new fiber can be used on conventional equipment for winding, twisting, knitting, slashing, weaving, braiding, dyeing, and finishing. Some ultimate uses for Orion include: automobile tops, cordage, fish nets, laundry bags, electrical insulation, rainwear, bathing suits, curtains, window shades and awnings.