Patent GB-770088-A (GB)
Title: Improvements in or relating to apparatus for mounting pairs of stereo transparencies
IPC: G03D15/10
Filed: 1955-04-21
Abstract: 770,088. Picture mounting. KODAK, Ltd. April 21, 1955 [April 23, 1954], No. 11537/55. Class 11. Apparatus for mounting stereo transparencies comprises a device operable to advance a film strip bearing pairs of interocularly spaced stereo images one image area at a time, a device for successively severing single image areas from the strip, a support for a mount formed with a pair of apertures, and means for moving the support relatively to the strip so as to position the apertures in correct stereo relation to a pair of image areas. The machine comprises a base supporting a face plate 25, Fig. 1, upon which is supported a platen 34. Stereo film strips, Fig. 10, are wound onto a roll 26 rotatably supported on a bracket 27 and the film is passed over an idler roller 28 through a tensioning device 29, comprising two frictionally engaged rollers mounted on an arm pivoted and spring biased to effect the tensioning, and along a track 23. The film then passes under a cutter knife 30 and a tailing arm 41 both operated from a cam shaft driven by a one revolution electric motor operated by a foot pedal 47. The platen 34 supports a mount having four apertures, the mount being positioned on the platen 34 by guide blocks 36, 37 over which the upper two apertures are located. The film is aligned with the lower two apertures upon which the stereo transparencies are mounted by the tacker 41 and the mount is subsequently folded over on itself so that the upper apertures register with the lower ones. The platen is mounted for longitudinal movement along a stationary track through a sequence of four positions. To this end a cam follower 110, Fig. 5, is provided on a spring biased toggle arm 111 pivoted on a bracket 113 depending from the platen 34. When the platen is moved from the extreme right hand position shown in Fig. 5 the cam follower 110 rides up a cam surface 121 so that the arm 111 passes dead centre and the platen can be moved without hindrance to the extreme left hand position when the cam follower 110 is brought back to its operative position by a cam surface 122. In moving the platen to the right the cam follower co-operates with a cam having four depressions 123 with which the cam follower 110 co-operates thus defining four positions of the platen 34. In operation the film is first positioned by means of indications 42, 43 which are registered with the first image area. The film is then advanced by means of a film advance knob 40 which operates a claw 130 which engages the film perforations. The film is advanced two frames so that the leading edge of the film may be severed by manual depression of the knife 30. The film is then advanced one more frame thus bringing the first right hand transparency 1R over the lower left hand aperture 33 of a mount positioned on the platen 34 which latter is in its extreme right hand position. The platen is then moved in sequence through the positions indicated in Fig. 11 and each time the platen. is moved the film is advanced one frame. Corresponding right and left transparencies are thereby tacked to each mount, and as each mount is completed so it is removed and a further mount placed on the platen.