Patent · US Expired

Buttonhole sewing machine

US6694901B2 · kind B2 · utility

0Cited by

3References

10Claims

0Family size

Assignee

Dürkopp Adler AG · DE

Inventors

Karsten Filges · Bielefeld, DE
Theodor Janocha · Bielefeld, DE
Jochen Fischer · Whitehall, US

Key dates

Filing date	May 28, 2003
Grant date	Feb 24, 2004
Priority date	—
Expiry date	May 28, 2023

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05D2207/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A buttonhole sewing machine comprises a buttonhole cutting device which includes a knife and a cutting block unit with several cutting blocks, one of which at a time being movable into a position of cooperation with the knife. The cutting blocks are mounted on an anvil that is stationarily joined to the sewing machine. The knife is movable from above against the anvil.

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