Intermittent film transport registration stabilization device

Details Intermittent film transport registration stabilization device Intermittent film transport registration stabilization device

1976-05-24

1977-08-02

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With continuous feed and intermittent film arresting means

226 55, 226 95, 226 97, 226113, 226155, G03B 100

Patent

active

040392562

ABSTRACT:
The invention provides a modification of the conventional rolling loop transport system, which enables the system to operate at the relatively high pull-down speeds required to match the 1.3 millisecond vertical blanking times of a video format, thereby allowing use of the improved transport in a video system. The instant transport utilizes two gaps in a rotor set apart at 180.degree., entrance of the film at a selected shallow angle, a shortened distance from the exposure gate to the film outlet with no decay of the film loop until expulsion, and a secondary pair of fixed registration pins disposed at the point of expulsion of the film at the film outlet which, in conjunction with a vacuum platen extending from the exposure gate to the film outlet, significantly reduces the jitter at the exposure gate, to allow the use of the transport in high density laser or electron beam recorders.

REFERENCES:
patent: 3135159 (1964-06-01), Fabregat
patent: 3494524 (1970-02-01), Jones
patent: 3600073 (1971-08-01), Shaw
patent: 3794415 (1974-02-01), Jones
patent: 3944349 (1976-03-01), Jones

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