| 摘要 |
The apparatus comprises at least two opposed gauges (1, 2), between which the object (3) e.g. a banknote is intended to pass, and a recording or corresponding unit (10). Each gauge (1, 2) of substantially known kind comprises a pneumatically operated gauge head (4, 5), of which the end (6) facing toward the object (3) consists of a preferably axial-symmetric disc- shaped portion (6) with at least one central outlet aperture (7) preferably for compressed air, which portion (6) aerodynamically is designed so that a definite air flow through said outlet aperture (7) is related to a definite distance to the object (3). The gauge head (4) of at least one gauge (1) is movable to and from the object (3), and a transducer unit (9) preferably for inductive measurement of said movement is provided and connected to said recording unit (10). <IMAGE> |
