APPARATUS FOR KEEPING A PROTECTIVE HOUSING CLEAN

摘要

The invention relates to an apparatus for keeping clean a protective housing (1) for a sensor, a monitoring camera, a light source (2), or the like, which is part of a device (3) for continuously measuring and/or determining properties and/or monitoring and/or analyzing the operating states of a running paper web, cardboard web, or other fibrous web (4) and is used within a paper production or finishing machine. According to the invention, the protective housing (1) comprises a protective pane (5) for a sensory or optically effective path (6) of said device (3). Means (7) which continuously keep at least the protective pane (5) clean are associated with the protective housing (1).