Undercut and strengthened posts for polymeric bobbin basket

Details Undercut and strengthened posts for polymeric bobbin basket Undercut and strengthened posts for polymeric bobbin basket

1993-06-01

1994-12-27

Crowder, Clifford D.

Sewing

Elements

Revolving hooks

D05B 5726

Patent

active

053755448

ABSTRACT:
A polymeric bobbin basket having an increased mass with a partial undercut to engage a latching mechanism on a bobbin case. A dissimilar material of greater strength and fatigue resistance than the polymeric material used in the center post is embedded within the interior of the center post less than the full extent of the center post in an arrangement that absorbs vibration and increases the strength and fatigue resistance of the center post. A shoulder spacing between the materials form the undercut.

REFERENCES:
patent: 1702383 (1929-02-01), Hemlets
patent: 2154403 (1939-03-01), Karle
patent: 2204991 (1940-06-01), Haltenberger
patent: 2219308 (1940-10-01), Haas
patent: 2344110 (1944-03-01), Rubel
patent: 2815822 (1957-12-01), Ramsey
patent: 3016033 (1962-01-01), Herbst
patent: 3347193 (1967-10-01), Perri
patent: 3698333 (1972-10-01), Ketterer
patent: 4858593 (1989-08-01), Badillo
patent: 4970975 (1990-11-01), Ando et al.
patent: 5109783 (1992-05-01), Shimizu

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