Detachable top feed unit for sewing machines

Details Detachable top feed unit for sewing machines Detachable top feed unit for sewing machines

1993-01-14

1993-10-19

Crowder, Clifford D.

Sewing

Stitch forming

Feeding work material

112168, 112259, D05B 2704, D05B 7302

Patent

active

052536017

ABSTRACT:
A top feed unit comprises a vertical-movement kinematic mechanism (19) and a horizontal-movement kinematic mechanism (20) acting on a rocking arm (18) supporting a top feed dog (17) and operated by respective eccentrics (21, 29) fitted to an auxiliary shaft (37). The vertical- and horizontal-movement kinematic mechanisms (29, 20) and the auxiliary shaft (37) are contained in a housing structure (34) which can be detachably engaged to the sewing machine head (7). The auxiliary shaft (37) is connected to an interconnecting stem (41) rotatably connected to the sewing machine arm (6) and driven in rotation, through a toothed belt (46), by the upper drive shaft (8) of the sewing machine (2).

REFERENCES:
patent: 4422398 (1983-12-01), Dusch
patent: 4590875 (1986-05-01), Sanrito et al.
patent: 4996934 (1991-03-01), Lue
patent: 5113773 (1992-05-01), Klundt

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