Bobbin case assembly with thread tensioning element and...

Details Bobbin case assembly with thread tensioning element and... Bobbin case assembly with thread tensioning element and...

2005-06-07

2005-06-07

Izaguirre, Ismael (Department: 3765)

Sewing

Elements

Revolving hooks

C112S254000

Reexamination Certificate

active

06901871

ABSTRACT:
A bobbin case assembly having a wall structure mountable upon a support, a bobbin for a supply of thread, and a tensioning element for engaging thread projecting from a supply of thread on the bobbin. The tensioning element has a length and a circumferential surface against which thread can be wrapped so that a frictional resistance force can be generated between the thread and circumferential surface that resists drawing of thread off of the supply. The tensioning element has a configuration that limits lengthwise shifting of a spirally wrapped portion of thread wrapped against the circumferential surface.

REFERENCES:
patent: 2379882 (1945-07-01), Clark
patent: 2892428 (1959-06-01), Zylbert
patent: 2973920 (1961-03-01), Kucmerosky
patent: 4679513 (1987-07-01), Druffel
patent: 6152057 (2000-11-01), Badillo

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