Upper thread guide mechanism for sewing machines
CA 1263568 C · Owner: Matsuda, Kimikazu · Inventors: Matsuda, Kimikazu; Tanaka, Osamu; Mikuni, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An upper thread guide mechanism for a sewing machine is disclosed which includes a slit which lies in a vertical plane and extends from an upper surface of the sewing machine frame to a front surface. A tension device, a thread take-up spring, and upper and lower thread guides are disposed along the direction in which the slit extends. A thread take-up lever is installed so that it can reciprocate horizontally across the space between the pair of thread guides. The placement of the thread in the tension device, the thread take-up spring and the two thread guides can be attained simply by pulling the upper thread vertically downward through the slit. When the thread take-up lever is …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 5, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.