Patent · US Expired

Needle bar drive for a buttonhole sewing machine

US5797337A · kind A · utility

2Cited by

11References

10Claims

0Family size

Assignee

AMF Reece, Inc. · US

Inventors

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

Key dates

Filing date	Apr 8, 1996
Grant date	Aug 25, 1998
Priority date	—
Expiry date	Apr 8, 2016

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B55/14
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A counter-weighted eccentric or crank is clamped to an end of the upper drive shaft. A link is pivoted between the eccentric and an end of a short leg on a V-shaped rocker. The base of the V-shaped rocker is pivoted on a fixed pin. The long arm of the V-shaped rocker is connected to a needle bar to drive the needle bar up and down. The movement of the needle bar carries a main needle and thread through a workpiece to make stitches in the cloth.

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