Patent · US Expired

Microfilm reader

US4244641A · kind A · utility

1Cited by

6References

2Claims

0Family size

Assignee

AGFA-Gervaert AG · DE

Inventors

Wilfried Hofmann · Munich, DE
Guenther Lueder · Taufkirchen, DE
Peter Nassl · Gauting, DE
Peter Puechler · Munich, DE
John Krueger · Munich, DE
Walter Rauffer · Munich, DE
Herbert Lusch · Taufkirchen, DE

Key dates

Filing date	Jul 21, 1977
Grant date	Jan 13, 1981
Priority date	—
Expiry date	Jul 21, 1997

Classification

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

Abstract

A microfilm reader for enlarged projections of any desired micropicture among a number of such pictures on a microfilm. The microfilm is interleaved between two movable plates. A slidable support for the image forming objective is pressed with a tensioned spring against the upper plate. The slidable support can be connected to a slide lever for effecting its placement in proper position. Two arms of a spring can be employed for mounting the slidable support and for tilting it around an axis essentially parallel to the cover plate.

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