EP 0022175 B2 19851009 - ELECTROPHOTOGRAPHIC COPIER WITH VARIABLE ORIGINAL DOCUMENT TO IMAGE SIZE RATIO
Title (en)
ELECTROPHOTOGRAPHIC COPIER WITH VARIABLE ORIGINAL DOCUMENT TO IMAGE SIZE RATIO
Publication
Application
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
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