Patent ID: 6327054
Filing Date: 2001-12-04
Classification: B23B,H04N

Abstract:
A clamping device system for an interchangeable scanning drum seated at one side in a drum scanner for scanning of opaque or transparency image originals for achieving an adequate stable connection and reliable, dynamic operation, comprising:a scanning drum having a mounting flange centrally positioned relative to an acceptance flange of a drive motor, the mounting flange of the scanning drum being connected to the acceptance flange of the drive motor with a plurality of clamping devices, each clamping device being formed of a tension lever, a connecting rod, and a clamp lever;each clamping device having at least one spring for generating a basic gripping force for initial fixing and for preventing sliding upon run-up rotation of the scanning drum, the basic gripping force being transmitted via said tension lever, said connecting rod, and said clamp lever;each said clamping device being designed such that upon rotation of the scanner, centrifugal force is acted on a toggle lever mechanism formed of said tension lever, said connecting rod, and said clamp lever such that the gripping force of the clamp lever against the mounting flange of the scanning drum is greatly increased in a simple way in order to generate a stable and reliable coupling between the mounting flange of the scanning drum and the acceptance flange of the drive motor despite tilting forces produced by residual imbalances; andsaid at least one spring in each coupling device being designed such that only a relatively slight release switch force is necessary for a drum change due to said basic gripping force being relatively low in absence of centrifugal forces generated upon rotation of the scanning drum.