Presser bar pressure regulating module

Details Presser bar pressure regulating module Presser bar pressure regulating module

1976-05-26

1977-11-29

Schroeder, Werner H.

Sewing

Elements

Presser devices

D05B 2902

Patent

active

040600459

ABSTRACT:
A pressure regulating module for a sewing machine, the module supporting a pressure regulating cam, and a cam follower mechanism for cooperative engagement with the cam, the cam follower mechanism having a laterally extending ear impressed with a spherical surface impinging against a platform on a plunger slidably received in a bore in a presser bar of the sewing machine, the plunger being in abutment with a compression spring also received in the bore. The spherical surface, plunger, compression spring and presser bar are in substantial alignment when the module is assembled to the sewing machine frame. The cam includes a darning position where little or no pressure is applied to the presser bar, by which assembly to the sewing machine frame may be facilitated.

REFERENCES:
patent: 3055326 (1962-09-01), Greulich
patent: 3294047 (1966-12-01), Graham
patent: 3303804 (1967-02-01), Lesort
patent: 3410239 (1968-11-01), Doerner
patent: 3433193 (1969-03-01), Takahashi
patent: 3793969 (1974-02-01), Adams

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