Abstract: A pin-registered film transport assembly provides an interlacing motion for moving and guiding a photographic film through a film gate. The assembly includes a first carriage mounted for movement parallel to a direction of film travel and a first pin assembly including a first pair of registration pins which are engageable in oppositely disposed perforations of the film, where the first pin assembly is mounted on the first carriage for movement perpendicular to the direction of film travel for engaging and disengaging the film perforations. The assembly also includes a second carriage mounted for movement parallel to the direction of film travel and a second pin assembly including a second pair of registration pins which are engageable in oppositely disposed perforations of the film, where the second pin assembly is mounted on the second carriage for movement perpendicular to the direction of film travel.
September 21, 2000
Date of Patent:
November 12, 2002
Eastman Kodak Company
Richard L. Druzynski, Martin E. Oehlbeck
Abstract: An improved film transport assembly is provided for intermittently advancing film, without pulldown claws or similar mechanisms for engaging film perforations to obtain intermittent transport, with extended dwell period past the film gate of a camera or projector, particularly such as a motion picture camera or projector adapted for high speed film transport or for handling relatively large film formats. The transport assembly includes film supply and takeup sprockets for constant velocity film transport respectively to and from the film gate, with the film passing over a primary roller and a compensation roller interposed between each sprocket and the film gate.
Abstract: A motion picture camera of the type which advances the film through a film gate in a stop-and-go motion and particularly designed for high speed operation, and comprising a film drive mechanism having a sprocket and two guide assemblies for forming and guiding a loop of film through the film gate, one of the guide assemblies being mounted on an eccentric for continuous rotation while moving the loop of film against a stationary registration pin in intermittent fashion, the registration pin being disposed for insertion through a perforation of the film when the eccentric crosses dead center, and the other guide assembly being a compact structure for cooperating with the first guide assembly to reduce any accumulation of the composite error in the perforations of the film; the camera is also constructed in two sections which are removably secured together by a release mechanism which is readily separable by one hand of the operator of the camera, one section of the camera containing a film supply reel and take-
Abstract: A video film projector has a pin registration transport mechanism which employs inherent spring means in a loop of film to advance the film, and a synchronizing shutter to inhibit projection of light during transport of the film. The shutter comprises a rotating arcuate member rotatable to interrupt a light path of the projector, and an eccentric spindle rotatable with the shutter member and adapted to engage the film to `trigger` transport in synchronization with shuttering.The projector also includes a unique film guide construction for self-threading of the projector, a co-axial film reel mounting and driving mechanism, and a film storage cartridge which includes a mechanism for retaining the free end of the film strip in proper orientation for self-threading of the projector.