| 摘要 |
1,209,855. Intermittent film feed apparatus. D.B. MILLIKEN CO. Feb.27, 1969 [March 11, 1968]. No. 10569/69. Heading G2E. A continuously supplied perforated film is fed intermittently past framing aperture 14 by means of a rotating eccentric cam 44 which intermittently pushes the film against rollers 58 to disengage the film from a register pin 34 adjacent blocks 36, 38 defining film guide surface 40, a second rotating eccentric cam 54 drawing the film past aperture 14 until the next perforation engages pin 34 as cam 44 withdraws from the film. Film 12 is fed continuously from and to two coaxially mounted reels by sprocket 26 by way of an inclined roller (not shown). A film loop intermittently forms adjacent block 36 while cam 54 takes up the differential film velocity between block 38 and sprocket 26. A sectored shutter 60 rotates in synchronism with cams 44, 54. |
