International projectionist (Jan-Dec 1951)

The Neu-Zip' Combo Film Scraper for Safety Film r Wrong The ever-increasing use of safety film has occasioned the development of a new combination wire brush-scraper blade device for use in splicing film. This new unit, known as "Neu-Zip" and developed by Neumade Products Corp., is now available at the very low price of $2.95 through all theater supply dealers. Neu-Zip was developed at the suggestion of film handlers of long experience in theaters and exchanges, who found that there is an essential difference between nitrate and safety stock. In the latter, there is a binder between the base and the photographic emulsion which is tough and glossy, making proper splicing more difficult than with nitrate film. The Neu-Zip combines the conventional scraper blade with a stiff wire brush, both of which are used on the film. After scraping with the blade, a flick or two with the wire brush across the area to be spliced removes all traces of the emulsion and the binder and "fogs" the base to allow film cement to penetrate and make a perfect weld. Before using Neu-Zip a minor adjustment of the splicer is necessary. For example, on the Griswold splicer the cement guard is a fraction of an inch FIGURE 1 Correct away from the scraping blade. This guard on the upper left jaw should be moved FIGURE 2 to the right so that it comes just barely to the edge of the blade, as shown in Fig. 1. In Fig. 2 is shown the use of the wire brush so that the film has the frosty appearance shown in the right-hand section. If desired, both the emulsion and the binder may be removed by the use of the steel brush alone. To clean the brush and restore to original shape requires only a simple twisting between the thumb and forefinger. The unit, individually boxed with instruction sheet, is recommended by Eastman Kodak Co. U.S. Air Force Stereo Color Film A three-dimensional color process invented by Maj. Robert V. Bernier, Air Force, employs a single film, requires some alteration of the projector, and spectators wear Polaroid glasses. The Air Force has taken out patents in Major Bernier's name. Process, in development for 16 years, employs a system of alternate frames to eliminate projection of a second film, Your Very Best Buy BUY U. S. SAVINGS BONDS ^PROJECTORS havc eveay thing m CENTURY'S high-efficiency projector with! the NEW 4-inch diam. lens provides pic-| tures of increased brightness and appeal— | for even the largest drive-in screens. CENTURY'S water-cooled aperture gives) as much light with a 90 ampere arc as i other projectors using a 180 ampere arc I and heat filters!— Reduce power cost— Gera sharper pictures— Save film. CENTURY'S sealed, oil-less bearings and glass-hard gears reduce maintenance costs. No oil sprays or baths to mess up film or projection room. tyou ca*t SEE eutd HEAR t6e cU^ene*itef CENTURY PROJECTION AND SOUND SYSTEMS See your dealer or write for information URY PROJECTOR CORPORATION New York, N. Y. while a revolving shutter with alternate concave and convex mirrors is attached to the projector. 16-mm color film is used. A Sprocketless Developer A SPROCKETLESS developing machine for motion picture film has been developed in Europe in which the film in a flattened helical path is carried on racks whose single upper and lower rollers have neither flanges nor sprocket teeth. Overlapping of adjacent strands of film is prevented by fixed separator fingers at the sides of the rack where the film approaches the rollers. Swelling and shrinkage of the film are accommodated by a change in effective roller diameter in response to tension in the film strands. It is said this machine can be converted from 35 to 16-mm film merely by changing the strand-spacing fingers, with a corresponding increase in film capacity. Alternatively, 16-mm film can be spliced to 35-mm and permitted to follow it through the machine with mechanical adjustment. French Lenticular Film System THE LENTICULAR color film process employing a lenticular positive has been revived in France under the name "Opticolor" by the Societe Civile de Recherches Scientifiques B.L.V. The problem of printing from a lenticular negative is avoided by making three colorseparation negatives simultaneously in a beam-splitting camera provided with a prism block and three lenses working at an aperture of F:2, and of variable focus from 30 lo 68 mm. A special printer has been developed in which the three separation images are printed on a lenticular positive film having 30 minute lenses to the mm. in the picture area only. RCA and NBC joined in urging the FCC to take immediate steps to lift the Tv "freeze" and permit new stations. Considering the amount of critical materials which go into Tv stations and transmitters, no less than the tough attitude of NPA, the hid likely will fail. 26 INTERNATIONAL PROJECTIONIST June 1951