发明名称 |
Chain tensioning apparatus for a packaging machine. |
摘要 |
A tensioning system for an endless chain comprising a snail cam mounted on a second shaft parallel to a sprocket shaft which supports a sprocket and chain, a follower running against the snail cam and mounted on a mechanism supporting the sprocket shaft, a ratchet device which selectively limits the rotational direction of the second shaft so that the radius of the snail cam at the follower increases with rotation, a means of applying a controlled rotational force to the second shaft to advance the ratchet device if chain tension is below a predetermined level, but not advance it if chain tension is above a predetermined level. |
申请公布号 |
ZA9704851(B) |
申请公布日期 |
1997.12.30 |
申请号 |
ZA19970004851 |
申请日期 |
1997.06.02 |
申请人 |
RIVERWOOD INTERNATIONAL CORPORATION |
发明人 |
ALLEN L. OLSON;GERALD J. GEISENHOF |
分类号 |
B65G23/44;F16H7/08;F16H7/12;F16H7/14 |
主分类号 |
B65G23/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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