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. 23, 2004
Filed:
Oct. 07, 2002
Harumichi Tokuyama, Odawara, JP;
Makoto Nishizawa, Numazu, JP;
Jun Koike, Shizuoka-ken, JP;
Akihide Okube, Numazu, JP;
Fumiyuki Katoh, Shizuoka-ken, JP;
Hiroyuki Onuma, Numazu, JP;
Katsuhito Ogura, Numazu, JP;
Katsuyoshi Kido, Numazu, JP;
Toshiba Machines Co., Ltd., Tokyo, JP;
Abstract
A screw is incorporated in a heating barrel, and the tail end of the screw is rotatably supported by the front surface of an intermediate plate. Behind the intermediate plate, two linear motor units are connected in parallel and arranged around the shaft of the screw to form axial symmetry. The output shafts of the linear motor units are connected to the tail end of a driving shaft through a common connecting arm, and the leading end of the driving shaft is fixed to the rear surface of the intermediate plate. Each of the liner motor units is constituted by a plurality of voice coil linear motors connected in parallel. Each of the linear motor units can be independently controlled. Voice-coil linear motors to be used are selected according to the type of product to be manufactured.