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.
Jan., 1936 J CONTINUOUS PROCESSING 47
for swelling and shrinkage of the film while impaled by its sprocket holes upon the chain, and the question may also be raised as to the mechanical efficiency of a pair of chains carried in a spiral path.
Another of the flat-tank type of machines is disclosed in Patent No. 1,377,887, issued to Hubbard. The construction shown is of shafts at the ends of the shallow tanks to carry the film in a spiral path, the tanks being positioned one above the other. This system did not utilize the sprocket holes in the film for carrying purposes, but depended upon a friction drive between the rollers and the film.
It is, of course, desirable that as little solution as possible shall be carried from tank to tank, and, accordingly, various means have been suggested for removing excess fluid, such as the form shown in Patent No. 1,380,279, issued to Wescott. This mechanism consists of two pairs of opposed air jets acting upon opposite sides of the film to remove the loose moisture by air-blast. Such a mechanism is much less dangerous to the film and occupies much less space than the vertical rise of film required to remove the moisture by gravitational drainage.
Still another of the tube type of processing machines is shown in Patent No. 1,385,403, issued to Sentou and Jacquet. This machine includes crowned rollers with guards, and the bottom roller is carried on cords running to the bottom of the tank.
Another form of moisture-removing jet device is shown in Patent No. 1,407,543, issued to Hubbard, disclosing an elaborate system of two opposed flat air jets co-acting on opposite sides of the film.
Patent No. 1,435,764 shows another form of shallow tank with the film floated upon the surface for imbibition of die solution in the manufacture of colored film.
A somewhat odd and unusual structure is to be found in Patent No. 1,444,818, also issued to Wescott. This patent discloses an elaborate system of skewed rollers mounted both over a narrow tank and at the bottom of the tanks in the loops between sections. The structure is peculiar, and the purpose not clearly brought out.
In any continuous processing system, there is more or less constant danger of injury to the film. This is particularly the case where the sprocket holes are utilized for carrying the film forward, and various workers have attempted to minimize this danger. Patent No. 1,461,794, issued to DeMoos, discloses a tube type of machine, utilizing sprockets for conveying the film through the solutions, the sprockets