High lift sewing machine
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United States of America Patent
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-
May 10, 1994
Grant Date -
N/A
app pub date -
Aug 19, 1992
filing date -
Aug 19, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention comprises improvements to sewing machines for increasing the throat clearance of the machine. The improvements relate to 1) modifications to mechanical components of the machine to increase the throw and upper travel limits of the presser foot, upper feeding foot, needle and spreader, 2) an adjustment for allowing the speed of the upper walking foot to be variable relative to the speed of the lower walking foot, and 3) an improved biasing spring for biasing the presser foot downward.
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Family
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Cited Art Landscape
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