Title: Work feeding mechanism for sewing machines

Abstract: A sewing machine for sewing a material workpiece, comprises a needle holder having a sewing needle which is mounted for both pivotal movement for swinging backwardly and forwardly and vertical reciprocation. The needle is driven by a sewing machine main shaft which also drives first and second feed dogs which are independently cyclically and alternatively engageable with the material to be sewn for advancing it in timed relationship to the reciprocation and to the swinging movement of the needle.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Hager, Walter (Kaigerslautern, DT)

Application Number: 608162
Filing Date: 1975-08-27
Publication_date: 1976-07-20
Assignee: Pfaff Industriemaschinen GmbH (DT)
Primary Class(es): 112/310 112/313
Other Classes:
US Patent Ref:

1685436	Sep, 1928	Ringe	112/206.
3198154	Aug, 1965	Reeber	112/210.
3285210	Nov, 1966	Tretow et al.	112/206.
3687096	Aug, 1972	Smith	112/206.

Other Refs:
Primary Examiner: Hunter, H. Hampton
Assistant Examiner:
Attorney: McGlew and Tuttle