Arrangement of a cloth feeder in a sewing machine
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United States of America Patent
Stats
-
Aug 9, 1988
Grant Date -
N/A
app pub date -
Mar 5, 1987
filing date -
Mar 11, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Modern sewing machines comprise an automatic control of cloth feeding in a form of a guide mechanism or a link mechanism. This invention solves the problem of the several points of play in the guide and link mechanisms by substituting a linear driving motor (12) for these mechanisms, which motor drives the feeder directly in a linear movement without intervening mechanical transmission. The number of parts has been essentially reduced by this solution. The vertical movement of the feeder is brought about by a curve disc (22) driven by the sewing machine motor or by a separate motor for the vertical movement. The longitudinal and the vertical movements are synchronized to the other functions in other units of the sewing machine in an electrical or combined electronical/mechanical way.
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