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:
Nov. 27, 1990
Filed:
Jul. 18, 1989
Hidetsugu Umezawa, Tokyo, JP;
Yoshio Nitta, Tokorozawa, JP;
Tetsuji Watanabe, Tokyo, JP;
Takao Takahashi, Tokyo, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A tack-in selvage forming apparatus for tacking in the end portion of a picked weft yarn to form a selvage structure in weaving a towel. The tack-in selvage forming apapratus is comprised of a tack-in needle which is controllably driven by a driving mechanism including a cylindrical grooved cam rotatable in timed relation to a main shaft of a loom. The grooved cam is formed at its periphery with generally annular shallow and deep cam grooves. The shallow cam groove is parallel with a plane perpendicular to the axis of the grooved cam, while the deep cam groove is curved relative to the same plane. A part of the shallow cam groove and a part of the deep cam groove is common and the same in depth. The shallow cam groove has a profile corresponding to a resting state of the tack-in needle, while the deep cam groove has a profile corresponding to a tack-in operational state of the tack-in needle. A cam follower drivingly connected to the tack-in needle is selectively put into the shallow and deep cam grooves. Thus, the tack-in needle is rested when the cam follower is in the shallow cam groove and operated to accomplish tack-in of a weft yarn end portion when the cam follower is in the deep cam groove.