Nathan R Gleit

US Patent:

60812931, Jun 27, 2000

Filed:

Apr 11, 1997

Appl. No.:

8/827788

Inventors:

Brian K. Brown - Grayson GA
Larry D. Bisel - Canton GA
Nathan R. Gleit - Atlanta GA
Walter K. Chambliss - Atlanta GA

Assignee:

Steadi-Film Corp. - Atlanta GA

International Classification:

H04N 340

US Classification:

348 97

Abstract:

A linear motor driven film gate for a motion picture telecine and methods for operation. A housing associated with a telecine optical block is operative to support and transport a single film frame in a precisely controlled linear motion past a telecine scanning aperture for scanning. An entry guide sprocket on the telecine receives the film from a feed spool, stabilizes the film, and directs the film across the aperture. A pin assembly carrying precision milled registration pins on a film transport carriage engages with the film sprocket holes in a path perpendicular to the film plane. After the registration pins are engaged with the sprocket perforations, a precision linear motor with integrated optical position encoder pulls a single frame across the scanning aperture. When a single frame has passed by the aperture, the linear motor stops, and the registration pins are removed from engagement with the film. The linear motor then returns to an initial position to engage a subsequent frame of film.