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:
Dec. 30, 2003
Filed:
Nov. 26, 2002
Shih-Fang Chen, Taipei, TW;
Ching Chi Machine Co., Ltd., Taipei Hsien, TW;
Abstract
A sewing machine includes a first and a second lower rotary shafts coaxially coupled with each other by a shaft and disposed in a lower housing of the sewing machine. A looper thread take-up cam includes a first and a second take-up cam plates slidably key-fitted on the second lower rotary shaft. A slide interval is defined between the take-up structure and the shaft coupler, whereby the second cam plate can slide along the second lower rotary shaft to the slide interval and separate from the first cam plate for easily clearing up the tangling thread. A guide plate of the take-up structure is movably connected with a bracket of the lower housing, whereby by means of changing the position of the guide plate relative to the second lower rotary shaft, the take-up timing can be adjusted.