Patent · US Expired

Reproduction of transparent masters

US5959722A · kind A · utility

3Cited by

1References

35Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Markus Fussel · Hersbruck, DE
Gunter Findeis · Sauerlach, DE
Friedrich Jacob · Munich, DE
Knut Oberhardt · Holzkirchen, DE

Key dates

Filing date	Aug 25, 1997
Grant date	Sep 28, 1999
Priority date	—
Expiry date	Aug 25, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH04N1/4076
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A copying apparatus is adjusted in order to produce high-quality copies of transparent negatives or diapositives having excessive variations in brightness. The adjustment is performed using a reference master. The apparatus is properly adjusted when a copy of the reference master meets specific criteria.

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