Invention Grant
- Patent Title: Method and device for measuring the contamination of LEDs and inkjet printing machine and offset printing press having the device
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Application No.: US15215900Application Date: 2016-07-21
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Publication No.: US09969195B2Publication Date: 2018-05-15
- Inventor: Oliver Gottschalt , Michael Kohlmann
- Applicant: HEIDELBERGER DRUCKSMASCHINEN AG
- Applicant Address: DE Heidelberg
- Assignee: Heidelberger Druckmaschinen AG
- Current Assignee: Heidelberger Druckmaschinen AG
- Current Assignee Address: DE Heidelberg
- Agent Laurence A. Greenberg; Werner H. Stemer; Ralph E. Locher
- Priority: DE102015213785 20150722
- Main IPC: B41J29/38
- IPC: B41J29/38 ; B41J2/45 ; B41F7/02 ; G01K13/00 ; B41F33/00 ; B41F23/04
Abstract:
A method and a device are provided for measuring the contamination of a transparent covering of a plate having LED emitters which are cooled individually or in groups by cooling units. The temperatures of the individual or grouped cooling units are measured and conclusions about contamination are drawn from a comparison of the temperatures with one another. An inkjet printing machine and an offset printing press having the device are also provided.
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