Patent · US Expired

Looper drive for a buttonhole sewing machine

US5865132A · kind A · utility

0Cited by

17References

26Claims

0Family size

Assignee

AMF Reece, Inc. · US

Inventors

Rudy Papajewski, deceased · Blankenloch, DE
Gerd Papajewski · Blankenloch, DE

Key dates

Filing date	Feb 21, 1996
Grant date	Feb 2, 1999
Priority date	—
Expiry date	Feb 21, 2016

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B57/32
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A looper drive assembly for a buttonhole sewing machine includes a long arm which is driven by a double cam, followers and an oscillating plate at one end and the arm generally reciprocates longitudinally. V-shaped plates are pivoted at a second end of the arm. Ends of the V-shaped plates are connected to rocking links which carry the looper needles. The links are pivoted on shafts and support the V-shaped plates and the second end of the arm. As the arm reciprocates, the V-shaped plates swing, pull and push lower ends of the link and oscillate the links around shafts for alternating engagement of the looping needles with thread carried through a fabric by a main needle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.