Patent · US Expired

Buttonhole sewing machine

US6647905B2 · kind B2 · utility

0Cited by

3References

4Claims

0Family size

Assignee

Dürkopp Adler AG · DE

Inventors

Heinz Fransing · Melle, DE
Andreas Oberndörfer · Bielefeld, DE
Theodor Janocha · Bielefeld, DE

Key dates

Filing date	Apr 9, 2003
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Apr 9, 2023

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B29/00
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A buttonhole sewing machine comprises work piece clamps with displacement drives for displacement from an initial position of spread by a length of spread into a final position of spread. The work piece clamp comprises a supporting plate for accommodation of a work piece and a clamping plate mounted on the supporting plate. A clamping drive for actuation of the clamping plate supports itself on the supporting plate.

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