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:
May. 21, 2002
Filed:
Aug. 06, 2001
Masahiko Nishikawa, Osaka, JP;
Pegasus Sewing Machine Mfg. Co., Ltd., Osaka, JP;
Abstract
In a double chainstitch sewing machine, a movable thread guide is fixed to the lower end of a needle bar A fixed thread guide and a thread take-up cam are fixed to a jaw of a sewing machine arm The thread take-up cam has a cam section to be engaged with needle threads from the fixed thread guide to the movable thread guide and takes up the needle threads oscillating up and down by vertical motion of the movable thread guide Thread take-up members such as movable thread guide fixed thread guide and thread take-up cam are disposed centrally at the lower end of the needle bar near the needle and in the jaw of the sewing machine arm As a result, there is no member for thread take-up moving at the upper side and front side of the sewing machine arm, and dangerous positions for the operator can be decreased. Further, the thread pathway length from the workpiece to the thread tension device is shortened, and the effects of thread stretch properties can be decreased.