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FILM DIMENSIONS
1 15
Proposed American Standard
for splices
FOR 16-MILLIMETER MOTION PICTURE FILMS FOR PROJECTION
(Third Draft)
*»f U. .«. /'.< Of
SMPE 62 May, 1949
Z22.24
Page 3 of 3 Pages
Note 5 Dimensions B, C and D and their tolerances were chosen to make the 0.070-inch diagonal splice approximately symmetrical about the frameline when the film is shrunk 0.36 percent. The slight departure from symmetry Is to insure that when 8 millimeter splices are made on a combination splicer, the cut ends of the films will not encroach on the adjacent perforations.
Note 6 Dimensions G and F were chosen to give a straight 0.100-Inch splice that is symmetrical about the included perforation (and therefore the frameline) when the film is shrunk 0.36 percent. See Note 4.
Note 7 The width of the film at the splice shall not exceed 0.630 inch. If the film has been widened during scraping, the extra width shall be removed.
Note 8 The overlapping perforations of the two films shall not be offset laterally more than 0.002 inch.
Note 9 At the splice, the edges of the two spliced films shal] not be offset laterally more than 0.002 inch, unless a difference in the lateral shrinkages of the two strips makes it Impossible to maintain that tolerance. Shoulders formed by such misalignment shall be beveled after the cement has dried*
Note 10 In the plan views, the angle between the respective
edges of the spliced films shall be 180 degrees, plus or minus 40 minutes. Thus, the spliced film shall be aligned to the extent that when one portion of the film is placed against a straight edge, the other portion will not deviate more than 0.006 inches (approximately the thickness of the film) in 6 inches.
Note 11 In order to prevent the appearance of a white line on the screen, the scraped area shall be 0.001 to 0.003 inch narrower than the area covered by the overlapping film. The presence of this narrow uncemented area will not shorten the life of the splice.
NOT APPROVED
Figure 12 (concluded)