Patent GB-1254705-A (GB)
Title: Strip handling mechanism, and cinematographic projector incorporating the same
Inventor: BUNDSCHUH JOHN JOSEPH
IPC: G03B1/56
Filed: 1968-11-21
Abstract: 1,254,705. Cine projectors; cartridges. EASTMAN KODAK CO. Noy. 21, 1968 [Nov.24, 1967], No,55365/68. Heading G2E. A cine projector has a spindle 18 which supports and may drive a film supply roll either within a cartridge 23 or on a reel 40, the spindle being carried on a support arm 21 movable about shaft 22 from a lower position for the cartridge mode of operation to a raised position for the reel mode, there being an automatic film stripping and threading mechanism operative in the cartridge mode whereby the film-end is fed to engage teeth on the driven take-up reel 16, it being necessary to feed the film-end manually to the threading mechanism in the reel mode. Film threading. Depression of ear 26 causes stripper finger 27 to enter a slot in the cartridge base and contact the film roll, while member 28 is swung about pivot 29 to bring driven belt 30 into driving contact with the roll periphery whereby the film-end is drawn out of the cartridge, the drive to spindle 18 being disconnected. The film then enters the curved channel defined by fixed member 31 and spring-loaded film-tensioning snubber 32 pivoted at 33 and is directed on to the claw feed mechanism. A shoe 39 on snubber 32 actuates rewind mechanism, when, at the end of projection, film-tension increases and lowers the snubber. For reel-mode threading, a guide roller 47 moves along slot 132 to engage and form a nip with belt 30 to which the film-end is manually led. Cartridge. The film spool 51, Fig. 4, is enclosed by lower and upper separable members 49, 50, the film-end being secured to hub 59 in an axial bale by wedging pin 61. Vertical slot 58 in the cartridge base provides access for the stripper finger and belt. Rib structure 65, 66 mates with recess 68 in mechanism plate 19 of the projector to align the cartridge, latches 76, 77 engaging recesses 84, 85 of the cartridge. Differently sized cartridges may be used, only the rib structure being of the same dimensions. Cam control means. A multiple lobe cam member 156, Fig. 15, is freely rotatable on a constantly driven shaft 29 to which it is intermittently clutched. Stripper finger 27 is controlled through a slide bar 191 which engages lobe 186 with follower 197, while the stripper belt member 28 is controlled a lever 199 having a follower 202 engaging lobe 189. A lever 133 with follower 227 engaging lobe 188 controls the movement of guide roller 47. Lobe 188 also controls a snubber blocking lever 239 with follower 240 to reduce the spring-loading of snubber 32 during projection. Selector slide bar 215 is spring urged upwardly to engage arm 21 by the lip 219 and when that arm is raised to the reel mode position, surface 233 blocks stripper finger and inter-linked belt member 28 from engaging the film coil. Gate and claw feed. Vertical film channel 258, Fig. 17, is defined between fixed gate member 251 and a movable member with a projection aperture and claw receiving slots. These members are separated during cartridge rewind by means of a cam finger member 291 with tongues 308, 313 which respectively retract the movable gate member and plate 271 of a shuttle claw feed device. Plate 271 slides and pivots between ball-bearings 272 in response to engagement with the edge and face respectively of a cam 275 rotating on the shaft 276 of bladed shutter 274. Control lever 36, Fig. 1, is used to change the phase relationship of cam followers to give reverse projection. Still projection is also possible. Film take-up and supply spindles. The take-up spindle (14) has a spring key (362) to retain the reel, and has a flange (359) frictionally engaging a cup-shaped member (358) at the end of a sleeve (356) freely rotatable on fixed shaft (351), as in Fig. 22 (not shown). Sleeve (356) is selectively engageable with and driven by belt-driven hub member (364) axially shiftable along shaft (351) by means of bar (411). Spindle (14) tilts on shaft (351) under the load for a film reel to give a weight dependent engagement with driven member (358). A similar weight-sensitive coupling is provided for the supply-spindle 18.