Sewing – Elements – Needles
Patent
1992-05-27
1993-06-01
Crowder, Clifford D.
Sewing
Elements
Needles
D05B 8500
Patent
active
052150216
ABSTRACT:
A sewing machine needle has a piston for clamping the needle into a sewing machine, a needle shaft comprised of a shaft portion and an end piece with a tip, whereby the needle shaft has a needle eye between the shaft portion and the end piece for receiving a sewing thread. A conical portion connected to the piston forms a transition into the needle shaft. The end piece, between the tip and the needle eye, has a triangular radial cross-section with rounded corners, whereby the size of the triangular cross-section increases from the tip toward the needle eye, and whereby the triangular cross-section has its greatest size in the vicinity of the needle eye. The needle shaft, in the area of the needle eye, has an essentially circular cross-section, and this circular cross-section has a size that is smaller than the greatest size of the triangular cross-section.
REFERENCES:
patent: 568946 (1886-10-01), Hanna
patent: 2092929 (1937-09-01), Ovington
patent: 3521583 (1970-07-01), Pozzolo
patent: 3929082 (1975-12-01), Zocher
patent: 3986468 (1976-10-01), Szostak et al.
patent: 4194457 (1980-03-01), Parsons
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patent: 4519330 (1985-05-01), Zylbert et al.
patent: 5046438 (1991-09-01), Hakui
Das ABC der Schuele Fabrikatics, 1934, p. 1747.
Crowder Clifford D.
Izaguirre Ismael
Singer Spezialnadelfabrik GmbH
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