Patent · US Expired

Material clamp for sewing machines

US4549492A · kind A · utility

3Cited by

2References

7Claims

0Family size

Assignee

PFAFF INDUSTRIES MASCHINEN AG · DE

Inventors

Ernst Albrecht · Hochspeyer, DE
Edgar Busch · Trippstadt, DE

Key dates

Filing date	May 23, 1984
Grant date	Oct 29, 1985
Priority date	—
Expiry date	May 23, 2004

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B3/06
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The cloth clamp comprises a pivot arm provided with a clamp foot, which arm can automatically assume a closed position through a toggle lever drive, a setting lever connected therewith, and an extension spring acting on the setting lever counter to the force of a leaf spring packet acting on the toggle lever drive. An actuating mechanism is needed only for opening the cloth clamp.

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