Apparatus to be fitted up on a conventional sewing machine for s

Details Apparatus to be fitted up on a conventional sewing machine for s Apparatus to be fitted up on a conventional sewing machine for s

1991-10-04

1992-12-01

Schroeder, Werner H.

Sewing

Stitch forming

Multiple machines

112163, D05B 2500

Patent

active

051671956

ABSTRACT:
The present apparatus (1) can be attached to a conventional sewing machine (2) and consists essentially of upper and lower frames. A needle bar unit (8) along with relative driving means is attached to the upper frame. A rotating hook (11) is attached to the lower frame. The upper frame and the lower frame are situated in front of and around a working head of a sewing machine (2) in order to cooperate with the head itself, there being thus the possibility of sewing double, parallel seams simultaneously. The needle bar unit (8) and the rotating, hook (11) are set in motion through secondary shafts (7, 10), which are connected through kinematic transmission belts (4,6) to a main driving pulley (3) of the complete sewing unit.

REFERENCES:
patent: 447880 (1891-03-01), Kern
patent: 913598 (1909-02-01), White
patent: 1578324 (1925-02-01), Klau
patent: 3332381 (1965-07-01), Dobner et al.
patent: 3783811 (1974-01-01), Schmedding et al.
patent: 4043283 (1977-08-01), Jung
patent: 4147119 (1979-04-01), Dunn
patent: 4641591 (1987-02-01), Draghicchio

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