Apparatus for preventing backlash between the meshing teeth of a first and a second gear in a printing unit of a lithographic rotary printing press
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United States of America Patent
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Sep 29, 1998
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 18, 1996
priority date (Note) -
Expired
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Abstract
Apparatus for preventing backlash between a first gear and a second gear of a gear train. Exemplary embodiments include a supplementary gear rotatably mounted adjacent to the first gear and rotatable about the same rotational axis as the first gear, the teeth of the supplementary gear being in meshing engagement with the teeth of the second gear. The apparatus further includes a support element formed on at least one of the first gear and the supplementary gear, and a leaf spring assembly extending essentially radially with respect to the rotational axis of the first gear. The leaf spring assembly is bent out of its zero-position and engages the support element at its second end portion, thereby applying a force to the support element for biasing the supplementary gear and the first gear to rotate in opposite directions.
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