The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1988
Filed:
Nov. 19, 1986
Paul J Leska, Sr, Coon Rapids, MN (US);
MTS Systems Corporation, Minneapolis, MN (US);
Abstract
Apparatus for reinforcing or attaching composite structural materials by chain-stitching. A reciprocating head is powered to alternate between outward and return motions. A needle is mounted for outward and return movement with the head, the needle having a material piercing end and a notch adjacent the material piercing end. A cast off has a first portion configured to overlie the notch, to maintain a thread within a notch, and a second portion configured to expand a loop in the thread on release of the thread from the notch. The needle pierces the material on outward motion of the head and withdraws through the material, with the thread in the needle notch, during the return motion of the head. The cast off first portion overlies the needle notch during a part of the needle return movement and moves in trailing relation to the needle during a part of the needle outward movement. A pressure foot may also be commonly driven, with the needle and cast off, by the head.