Bobbin holder
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United States of America Patent
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-
Dec 25, 2012
Grant Date -
Jun 14, 2012
app pub date -
Jan 11, 2012
filing date -
Jul 15, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
The improvement relates to a bottom holder for winding up a thread, wherein a bobbin case can be slid onto a protruding bobbin spindle. In order to catch and clamp a thread on the circumference of the bobbin spindle at the beginning of a bobbin travel, a thread catching device and a thread clamping means are provided at a free insertion end of the bobbin spindle. In order to both securely clamp and automatically release the thread end when sliding off a bobbin, according to the improvement, the clamping means is formed by a hollow cylindrical clamping bushing, an outer cone thereof being fitted into an inner diameter bounded by catches, such that a clamping slit substantially axially oriented and open toward the insertion end of the bobbin spindle is formed between the clamping bushing and the catch.
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