Flat transmission belt
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United States of America Patent
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N/A
Issued Date -
Jan 29, 2009
app pub date -
May 15, 2006
filing date -
May 16, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
There is provided a flat transmission belt that suppresses occurrence of cracks in the belt surfaces to extend the life of cover rubber layers and hence the life of the belt as a whole. A flat transmission belt of the present invention has a first cover rubber layer and a second cover rubber layer formed on a side of the belt opposite to the side on which the first cover rubber layer is formed, and is wound between driving and driven pulleys when in use. The first cover rubber layer and the second cover rubber layer are respectively formed of rubber materials that are of the same kind but differ in mixing ratio of the components thereof, and the first cover rubber layer, which contacts a smaller number of the driving and driven pulleys, has an extension ratio higher than the extension ratio of the second cover rubber layer, which contacts a larger number of the driving and driven pulleys.
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