Device for inscribing additional information on microfilms

Details Device for inscribing additional information on microfilms Device for inscribing additional information on microfilms

1975-03-31

1977-05-31

Stephan, Steven L.

Optics: image projectors

Simultaneous projection and manual delineation

33 23R, 33 23J, 353 95, G03B 2100, B43L 1310

Patent

active

040266443

ABSTRACT:
A device for inscribing additional informations on microfilms of a construction, wherein informations already recorded on microfilms are projected on an image screen by means of an enlarging and projecting device, additional informations to be entered on this microfilm are written in on the projected enlarged information images on the screen by a pen through guide means which moves on the projected image on the screen, the additional informations thus written-in on an appropriate portion on the projected image on the screen are reduced by a scale reducing means interlinked with the guide means and which reduces the movement of the guide means, and the thus reduced additional informations are then inscribed on the microfilm by means of write-in needle attached to the scale-reducing means.

REFERENCES:
patent: 3102448 (1963-09-01), Hammer
patent: 3324762 (1967-06-01), Walter et al.
patent: 3501838 (1970-03-01), Agliata et al.
patent: 3659933 (1972-05-01), Weitz

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