We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
Continuous Processing Machine for Wide Film
By Herbert E. Hews ton and Carlos H. Elmer
A new continuous processing machine for wide film carries the principles of motion picture film processing into the field of processing black-andwhite film ranging in width from 70 mm to 12 in. Details of design and operation are outlined.
AT THE NAVAL ORDNANCE TEST STATION many kinds of quantitative data from test firings of rockets and guided missiles are recorded on special cameras which use film wider than 35 mm. These cameras include the Bo wen Ribbon-Frame camera, described by Green and Obst,1 which uses 53^-in. film; K-17 aircraft cameras modified for ground-to-air recording which use 9^-in. film; and various types of oscillographs which use film up to 12 in. in width. Until recently, these film records have been processed in smallcapacity aerial roll-film processing units of the Smith-Fairchild or Morse types. After processing, the films were dried on a revolving drum.
Since a single day's test firing may result in exposure of several thousand feet of wide film, the inability of small tank processing to handle this material was evident. This was especially true
Presented on April 30, 1951, at the Society's Convention in New York by Herbert E. Hewston and Carlos H. Elmer, Photographic Laboratory Branch, U.S. Naval Ordnance Test Station, Inyokern, China Lake, Calif.
because of the rigorous time limits imposed on the processing laboratory so that the film records might be examined in time to change subsequent firing conditions.2 There was also a need for a processing method which would provide greater uniformity in the finished film product than was possible with the small tank method. To meet the requirements of this Station, design of a continuous wide film processing machine was initiated in 1948.
In June, 1949, the design and performance specifications had been formulated. The contract for construction was awarded to Imagineering Associates, Inc., of Pasadena, Calif., where the machine was constructed under the general supervision of Irving W. Akers. The machine was delivered to this Station in December, 1949. After installation and some subsequent modification, it was placed in production during September, 1950.
The components are shown schematically in Fig. 1. The machine is divided into three main parts: the darkroom wet-end section, the wash section and the dry box. Figure 2 shows the entire machine.
June 1951 Journal of the SMPTE Vol. 56
613