Patent · US Expired

Snap action thread and gimp trimming on a buttonhole machine

US5447108A · kind A · utility

0Cited by

13References

15Claims

0Family size

Assignee

AMF Reece, Inc. · US

Inventors

Joseph Hamill · Florence, US
Ronald A. Hulit · Mechanicsville, US
Anthony M. Lewandowski, II · Mechanicsville, US
Gerd Papajewski · Blankenloch, DE
Reinhold Papajewski

Key dates

Filing date	Sep 29, 1993
Grant date	Sep 5, 1995
Priority date	—
Expiry date	Sep 29, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T83/8782
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to thread trimming devices for eyelet buttonhole machines. The invention comprises a thread trimming device having a snap action spring arm knife. As the thread hook positions the thread and gimp, a cam lifts up the end of the spring arm. The cam then releases the knife whose torque snaps down and cuts the thread and gimp against a second knife edge. The thread and gimp are also held together at this point for the next buttonhole by a thread retainer which is built into the knife.

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