发明名称 |
Ink and dampening solution determination in offset printing |
摘要 |
An optical instrument for determining properties of the imaging and non-imaging areas of offset printing plates is disclosed. A laser light source (30) directs a laser beam (35) at the surface layer (50) of an offset printing plate (60). A specularly reflected beam (45) is detected by a light detector (40). Additionally. scattered light (55) is detected by a light detector (50). The detectors (40, 50) produce light intensity signals for the reflected and scattered light, respectively. A data processor (70) processes the intensity signals to determine various properties relating to the dampening solution and ink present on the non-imaging and imaging areas of the printing plate, respectively. These properties include the thickness of dampening solution in non-imaging areas, the image density in imaging areas of a moving printing plate, and the occurrence of scumming in non-imaging areas of a printing plate. The processed intensity signals also may be utilised to control the application of ink and dampening solution to an offset printing press.
|
申请公布号 |
US6832550(B2) |
申请公布日期 |
2004.12.21 |
申请号 |
US20020221085 |
申请日期 |
2002.10.24 |
申请人 |
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION |
发明人 |
MARTIN ALISTAIR SCOTT;NETTERFIELD ROGER PRYCE;FREUND CHRISTOPHER HAYES;GLASS MONTY;FARRANT DAVID IAN;BROTHERS MICHAEL LAWRENCE |
分类号 |
B41F33/14;B41F31/02;B41F33/00;G01B11/06;G01F23/28;G01N21/47;(IPC1-7):B41F31/02;B41F33/10 |
主分类号 |
B41F33/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|