发明授权
- 专利标题: Recessed top feed for sewing machines
- 专利标题(中): 嵌入式缝纫机顶部进料
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申请号: US432810申请日: 1982-10-05
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公开(公告)号: US4448140A公开(公告)日: 1984-05-15
- 发明人: Robert E. Porter
- 申请人: Robert E. Porter
- 专利权人: Porter Robert E
- 当前专利权人: Porter Robert E
- 主分类号: D05B27/04
- IPC分类号: D05B27/04
摘要:
A top feed arrangement for cooperation with a lower feed dog of a sewing machine, the lower feed dog cyclically engaging and disengaging the lower surface of material to be sewn in order to move that lower surface along a predetermined path through and past the sewing machine. The top feed arrangement comprises an upper feed dog carried by an arm that is linked to an oscillatory take-off from the primary drive system of the sewing machine. The arm is connected to the device at one end in a pivotal connection and the upper feed dog is carried at the other end of the arm. The arm is resiliently urged in a direction to cause the upper feed dog normally to approach the lower feed dog. A lifter device also responsive to the primary drive system of the sewing machine, periodically moves the upper feed dog in a direction away from the lower feed dog against the resilient force. The linkage from the sewing machine drive to the top feed is housed in a recessed area removed from the work and an uncluttered large work area is provided.
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