Tensioning arrangement for a rotational printer ensures that teeth and grooves of the gear wheels are correctly aligned in both coupled and uncoupled states, so that secure teeth surface contact is maintained

摘要

First (3) and second (5) gear wheels are positioned by device (19) that moves second wheel relative to first between coupled and uncoupled positions. A tensioning device aligns teeth and grooves of the wheels with a first tensioning element (9) for tensioning a circumferential tensioning loop (7). The first tensioning element (9) is tensioned using a spring (8), while a second tensioning element (11) connected to the tensioning loop can be moved between first and second positions.