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US 4,393,798 AGranted
Rotary shuttle for a sewing machine
OwnerHaw-Lin Chenginventor
Life of this patent
Estimating the term…
Abstract
An internal housing comprises an upper part 1, a lower part 3 and a middle part 2. The middle part 2 connects the internal housing to an external housing 4 to form a rotary loop taker. The external housing 4 comprises an elastic piece 6 for engaging thread as well as a tail base 42 and an internally tapered ring 5 for fitting the loop taker into a sewing machine. The middle part 2 provides a ring about which the external housing 4 is rotatable, and to facilitate this rotation, this middle part is of or coated with Teflon.
Claims2
A rotary loop taker for a sewing machine comprising:
- (a) an internal housing comprising an upper part and a lower part held together by a ring which forms a middle part of the internal housing;
- (b) an external housing comprising a tail base over which can be fitted an internally tapered member for fitting the loop taker into a sewing machine;
- and
- (c) a flexible piece fixed to the external housing, the external housing and flexible piece being free of screw holes and the ring having a Teflon coating so that the internal and external housings are rotatable relative to each other.
1 more element
Dependencies are inferred from the claim text.