Global Patent Index - EP 0022175 B1

EP 0022175 B1 19830413 - ELECTROPHOTOGRAPHIC COPIER WITH VARIABLE ORIGINAL DOCUMENT TO IMAGE SIZE RATIO

Title (en)

ELECTROPHOTOGRAPHIC COPIER WITH VARIABLE ORIGINAL DOCUMENT TO IMAGE SIZE RATIO

Publication

EP 0022175 B1 19830413 (EN)

Application

EP 80103074 A 19800603

Priority

US 5084979 A 19790621

Abstract (en)

[origin: EP0022175A1] An electrophotographic copier, of the type in which a line of light scans the original document and in which the lens is movable to effect variations in the ratio of original document to image size, has a field stop mask positioned to intercept light from a document being scanned before it is passed to the lens. The mask has an aperture configured to minimise image intensity variations caused by changes in the ratio, to correct for lens cos<4> losses and to compensate for uneven intensity along the line of light scanning the document.

IPC 1-7

G03G 15/052; G03B 27/50

IPC 8 full level

G03G 15/041 (2006.01)

CPC (source: EP)

G03G 15/041 (2013.01)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0022175 A1 19810114; EP 0022175 B1 19830413; EP 0022175 B2 19851009; DE 3062716 D1 19830519

DOCDB simple family (application)

EP 80103074 A 19800603; DE 3062716 T 19800603