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The position of a metal type belt can be maintained without supporting guide rolls by providing an idler pulley which is mounted on its support shaft with a self-aligning bearing.
English (United States)
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Type Belt Drive
The position of a metal type belt can be maintained without supporting guide
rolls by providing an idler pulley which is mounted on its support shaft with a self-
In the figure, type belt 1 is supported for rotation about drive pulley 2 and idler
pulley 3. Drive pulley 2 is fixed in position and rotated by drive motor 4. The
shaft 5 supporting idler pulley 3 is adjustable in the direction of the arrow to
tension belt 1, and the idler is formed with a crowned surface. The idler is fitted
with upper and lower flanges 6 having outwardly curved edges that provide slight
clearance for belt 1. Pulley 3 is supported on shaft 5 for rotation on bearing 7
which allows pulley 3 to change its plane of rotation with respect to the axis of
supporting shaft 5.
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