Photo-electronic film transport

Claim 2

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third apertures on the side of film passing through said exposure section opposite said holder, and electrical means actuated by said photocell for controlling said motor for first slowing and then stopping driving of said film when a locating spot on said film interrupts transmission of light from said lamp to said photocell.

Claim 3

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a slide mounted for transverse movement in said exposure section, and an adjustment control for moving said photocell and lamp to different positions relative to the edge of said first aperture, said holder mounted on the inner end of said slide, whereby said photocell senses locating spots on said film at different distances from the edge of said film.

Claim 4

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a slide mounted for transverse movement in said exposure section, and an adjustment control for moving said photocell and lamp to different positions relative to the edge of said first aperture, said holder mounted on the inner end of said slide, whereby said photocell senses locating spots on said film at different distances from the edge of said film.

Claim 5

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure sectioN on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a lever connected to said holder and manually actuated means for moving said lever to move said holder relative to said first aperture parallel to the direction of film movement.

Claim 6

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure sectioN on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a lever connected to said holder and manually actuated means for moving said lever to move said holder relative to said first aperture parallel to the direction of film movement.

Claim 7

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a second photocell adjacent said first-mentioned photocell and spaced therefrom in the direction of movement of said film, and electrical means controlled by said second photocell to change the speed of movement of said film drive to slow speed when illumination of said second photocell is interrupted by said locating spot, whereby said second photocell senses said spot and slows film movement and said first-mentioned photocell senses said spot to accurately stop said film relative to said first aperture.

Claim 8

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a second photocell adjacent said first-mentioned photocell and spaced therefrom in the direction of movement of said film, and electrical means controlled by said second photocell to change the speed of movement of said film drive to slow speed when illumination of said second photocell is interrupted by said locating spot, whereby said second photocell senses said spot and slows film movement and said first-mentioned photocell senses said spot to accurately stop said film relative to said first aperture.

Claim 9

A transport according to claim 4 in which said motor is reversible and which further comprises a pair of one-direction clutches in said gear train, said second photocell reversing said motor and said clutches slowing rotation of sad film drive.

Claim 10

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a first shaft driven by said gear train and carrying a first roller to engage one side of said film, a yoke pivotally mounted to said second means, a second shaft rotatable in said yoke carrying a second roller in registry with said first roller on the opposite side of said film and resilient means biasing said rollers together.

Claim 11

In a film transport, a main frame, first means for mounting an input reel on one side of said frame, second means for mounting a takeup reel on the other side of said frame, a film drive for pulling film from said input reel, an electric motor, a gear train for driving said film drive from said motor, an exposure section between said first and second means having aligned first and second apertures and means for guiding film between said apertures as said film is moved by said film drive, a lamp, a light proof holder for said lamp having a third aperture positioned at the edge of said first aperture and positioned to pass light from said lamp through the edge of film positioned in said exposure section on one side of said first aperture, a photocell holder carrying a photocell in registry with said third aperture on the side of film passing through said exposure section opposite said holder, electrical means for stopping said motor when a locating spot on said film interrupts transmission of light from said lamp to said photocell, a first shaft driven by said gear train and carrying a first roller to engage one side of said film, a yoke pivotally mounted to said second means, a second shaft rotatable in said yoke carrying a second roller in registry with said first roller on the opposite side of said film and resilient means biasing said rollers together.