Looper changeover device for an edge stitching sewing machine

Details Looper changeover device for an edge stitching sewing machine Looper changeover device for an edge stitching sewing machine

1978-06-29

1980-12-09

Schroeder, Werner H.

Sewing

Stitch forming

Convertible

112162, 112199, D05B 108, D05B 120, D05B 5706

Patent

active

042378044

ABSTRACT:
The tip end of the upper looper of an edge stitching sewing machine is adapted to have a different profile by engagement with a pawled looper arm provided on the upper looper itself or on a mounting post of the upper looper. When the pawled looper arm is engaged with the upper looper, the sewing machine performs one-needle two-thread edge stitching, while it performs its original one-needle three-thread edge stitching when the pawled looper arm is detached from the upper looper in a disengaged position.

REFERENCES:
patent: 967804 (1910-08-01), Merritt et al.
patent: 1864393 (1932-06-01), Zeier et al.
patent: 1929323 (1933-10-01), Maier
patent: 3121413 (1964-02-01), Sigoda
patent: 3373706 (1968-03-01), Armstead, Jr.
patent: 3395660 (1968-08-01), Lewis, Jr. et al.
patent: 3753410 (1973-08-01), Kostenowczyk
patent: 3885509 (1975-05-01), Cox

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