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:
Oct. 20, 1987
Filed:
Feb. 19, 1986
Applicant:
Inventors:
Masaru Arakawa, Chigasaki, JP;
Masanori Numata, Hayamamachi, JP;
Assignee:
Nifco Inc., Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B65B / ;
U.S. Cl.
CPC ...
156 69 ; 53478 ; 156 731 ; 156 736 ; 1563096 ; 1565802 ; 220 67 ; 220D / ; 264 23 ; 264248 ; 264268 ; 264320 ;
Abstract
A high frequency welding method comprises providing two plastic workpieces to be welded together with respective ribs which face each other, extend to the same height and have their surfaces opposite their facing surfaces inclined such that their thicknesses decrease toward their tops, and applying high frequency vibration to the ribs by positioning a high frequency welder horn such that the bottom of an annular groove of the horn having an arcuate sectional profile is pressed against the tops of the ribs.