International Projectionist (Jan-Dec 1945)

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Anonl Itcsiii-fnfetl Screens To the Editor of I. P.: I read with great interest the article in your September issue entitled "Screens: From a Sound Engineer's Point of View". This article is an ac- curate one and is to a large extent the same story that "Pop" Richardson told for many years prior to his death. For the past several years, there has been a screen on the market known as the Walker Plastic Moulded Screen whose reflective properties and character- istic features to a large extent meet the problemsseWorth in the aforementioned article. It>ioccurs 1 to me f -however, that in the selljng of this product, these par- ticular features may not have generally come to the attention of the projectionist, as I presume it is generally discussed with the theatre owner. You might, there- fore, be Interested in bringing this in- formation to the attention of your readers. It is a fact that all makes of screens that are perforated after they have been coated do not have clearly cut hole's. To a certain extent this is the effect of the sharpness of the die. In any event, at best it is inevitable that the thread ends will project put into every hole. The results are exactly as outlined in the article. An added result which does not directly affect the sound is that these thread ends absorb moisture and after a reasonably short period of time the threads break down the smooth screen surface. This results in the general de- terioration of the reflection characteristic. For a number of reasons we never recommend resurfacing of screens, par- ticularly as the perforations are likely to fill up. Close examination of the screen will indicate that within 3 or 4 months after it. has been resurfaced, it is no better than it was before. The Walker Plastic Moulded Screen differs, among other things, from any other screen in that it is not perforated ajter it is coated. The backing material is first perforated and seamed together. The screen is then coated as a complete unit with a very heavy plastic material. It is thus seamless. The circumference of each perforation is sealed with the plastic material so that it is impossible for any thread ends to project into the holes. Since the screen is coated with a curved surface, each hole is actually shaped as an exponential horn. This re- sults in excellent sound transmission and absolutely minimizes the possibility of dust collecting in the perforations. FuftheThiore; the hard plastic surface which will not disintegrate can be more easily brushed free of dust. A special cleaner is also made available for restor- ing the original reflection characteristic NOVEMBER 1945 of the screen every 6 or 12 months, de- pending upon local conditions which in- sures the continuous high cpiality of sound transmission. James Frank, Jr. Branch Manager, N- Y. C. National Theatre Supply Co. More Kind Words for I. P. To the Editor of LP.: Within a few weeks I expect to be dis- charged from the Armed Forces, and I would like you to send future issues of International Projectionist to my home in Carteret, N. J. At this time I would like to say that during my service with the Air Corps, I. P. was my favorite reading matter, and if it were not for your very interesting publication I would have been out of touch with developments in the industry. Thank you again for sending me the magazine; each month. Joseph L. Pusillo APO, New York, N. Y. VALLEN IS BACK ON PRE-WAR DELIVERY SCHEDULES Vallen, Inc., manufacturers of noiseless tracks, automatic curtain controls, and spe- cial equipment for theatres, schools, indus- trial auditoriums, etc.. of Akron, Ohio, has returned to normal pre-war delivery sched- ules, according to a company announcement. Substantial shipments of standard Vallen all-steel tracks, rear fold track and "Round- the-Corner" track equipment already are being made, E. J. Vallen, president, ex- plained. SIGNO-MARKEll The accurate, neat method of placing changeover signals on iilm is available at your dealer, or write direct to • CLINT PHARE PRODUCTS 282 E. 214 ST. EUCLID 19, OHIO NOW AVAILABLE j Wenzel Shock-Absorbing INTERMEDIATE GEAFI PATENTED \VV/ We are ac lively re pre- ==f seated in ^ 5 every part of the world. One of our most popular sellers. To keep your present equipment operat- ing smoothly until the time when our new projec- tors are available, use Wenzel quality, precision projector replacement parts. Send for our catalog. Mention name of dealer who serves you. =s Always striv- ing to MAKE hmm IT BETTER 29