| 发明名称 |
Variable presser bar pressure control arrangement |
| 摘要 |
A sewing machine having a presser bar operated by a lever having a movable fulcrum to vary the mechanical advantage of the lever and thereby vary the effective pressure on the presser bar.
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| 申请公布号 |
US4214540(A) |
申请公布日期 |
1980.07.29 |
| 申请号 |
US19790043779 |
申请日期 |
1979.05.30 |
| 申请人 |
SINGER CO THE |
发明人 |
COOK, ALBERT N |
| 分类号 |
D05B29/02;(IPC1-7):D05B29/00 |
主分类号 |
D05B29/02 |
| 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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