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. 05, 1987
Filed:
Jul. 24, 1986
Minoru Ito, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A buttonholer for forming hemstitches along the opposite legs of a buttonhole and bar tacks at the opposite ends of the same. A buttonholing feed regulating plate is mounted slidably on a feed control cam having a uniform lift cam surface formed in the circumference thereof, and the position of the buttonholing feed regulating plate relative to the feed control cam is decided by means of a buttonholing feed regulating cam to set a feed amount of the feed dog for hemstitching the legs of a buttonhole. An actuator plate is mounted slidably on a lateral jogging control cam having a cam surface formed in the circumference thereof, and the position of the actuator plate relative to the lateral jogging control cam is decided by means of a hemstitching groove cam which is driven by the main shaft of the sewing machine. The lateral oscillation of the needle of the sewing machine in forming hemstitches along the legs of the buttonhole and the lateral oscillation of the same in forming bar tacks at the opposite ends of the buttonhole are set by the engagement of a finger with the cam surface of the lateral jogging control cam and with the end of the actuator plate, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile