Scraper device and grater device

The invention relates to a scraper device (1) comprising a scraper blade (2) for interacting with a movable surface (6), a holding device (3) for the scraper blade, a device (5) for generating a contact pressure for pressing the scraper blade (2). to the movable surface (6) and a device (8) for at least indirect detection of a pressing force and / or the contact pressure over at least a portion of the extension of the doctor blade (2) at least indirectly characterizing size. The invention further relates to a squeegee device comprising a blade for equalizing a medium on a movable surface, a holding device for the blade, a device for generating a pressure for positioning the blade relative to the movable surface and a device for at least indirect detection of a pressure force over at least a portion of the extension of the blade at least indirectly descriptive size. The device (8) for the at least indirect detection of a size which at least indirectly characterizes the contact force and / or the contact pressure comprises at least one piezoelectric sensor (9, 9.1 to 9.n, 9.1, 9.21, 9.22, 9.31 to 9.3n, 9.41, 9.42, 9.5).