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MANAGERS AND PROJECTIONISTS
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the sprocket holes perfectly, which in practice means using either a splicer or some sort of metal teeth for a guide.
In many projection rooms the practice is to make splices with the unaided fingers. Film cement welds, more than it glues the film together, hence evenly applied pressure, of considerable amount, is necessary to the making of a perfect joint, and while it is quite possible to apply sufficient pressure with the fingers, it certainly cannot be applied evenly, with the almost inevitable result that even though the finger-made splice be strong in part of its width, it will be weak in another part.
In Fig. 78 you see a compact and very effective film splicer. It is made by the General Machine Company, New York City. We have had this device tested and have tested it personally. It is excellent and well worth its price, which latter is quite reasonable. We advise the installation of this device or a similar one in all projection rooms, and that the making of hand-made splices be Figure 78.
absolutely prohibited.
WIDTH OF SPLICE.— A too-narrow splice is apt to be weak, and a too-wide one objectionably stiff. Provided a good film splicer be used, there is no necessity for a splice of greater width than .125 (%) of an inch. Such a splice will be amply strong and at the same time sufficiently flexible to go through the projector without any indication of its presence in the film showing on the screen.
There has been a machine used by some producers which makes a splice about 1/32 of an inch wide. There is no practical advantage in the use of such a splice in positive film, and these very narrow splices have been an unending source of annoyance to the projectionists. The maker of the machine places the blame on those handling it, but that is no excuse, because a machine which does not function well in the hands of the employees who must be depended on to handle it is not a good machine, notwithstanding the fact that it would produce good results if expertly operated.