Patent · US Expired

Collapsible microfilm reader

US4131348A · kind A · utility

3Cited by

1References

5Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Wilfried Hofmann · Munich, DE
Guenther Leuder · Taufkirchen, DE
Walter Rauffer · Munich, DE
John Krueger · Munich, DE
Adolf Koopmann

Key dates

Filing date	Apr 27, 1977
Grant date	Dec 26, 1978
Priority date	—
Expiry date	Apr 27, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG03B21/115
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A collapsible microfilm reader having a lower body part with a micro-fiche projector and a cover hinged thereto and having a rectangular projection surface or screen on its inner surface which is operatively positioned when the cover is in its open position. The hinge or hinges which connect the body and cover are readily disconnectable and connectable so that the cover can selectively be mounted on the body with the long or short axis of the screen aligned with the central axis of the projector thereby permitting the optimum projection of micro-fiches of different formats by changing when necessary the orientation of the positioning of the cover on the body rather than requiring different positioning of micro-fiches of different formats with respect to the projector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.