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:
Jul. 06, 2021
Filed:
Jan. 30, 2019
Mitsubishi Aluminum Co., Ltd., Minato-ku, JP;
Yusuke Nakaura, Mishima, JP;
Yuki Hateruma, Numazu, JP;
Mitsubishi Aluminum Co., Ltd., Minato-ku, JP;
Abstract
An apparatus for producing an inner spiral grooved tube, the apparatus includes first and second bobbins, one of which is an unwinding bobbin and the other of which is a winding bobbin; a floating frame that supports a shaft of the first bobbin; a rotary shaft that supports the floating frame though bearings and rotates in a direction perpendicular to an axis of a bobbin in the floating frame; a revolving flyer configured to invert a tube route of a tubular material between the first bobbin and the second bobbin, to convey the tubular material, and to revolve the tubular material around the floating frame as being supported by the rotary shaft; and first and second drawing dies positioned on a front stage and a rear stage of the revolving flyer, respectively, in the tube route of the tubular material