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:
Feb. 25, 2003
Filed:
Nov. 15, 2000
Leo Hatjasalo, Helsinki, FI;
Jarkko Valtanen, Helsinki, FI;
Oy OMS Optomedical Systems Ltd., Helsinki, FI;
Abstract
The invention relates to a method for electrically controlling a flow of material, wherein a single- or multi-component, essentially polymer-based material ( ), such as plastics, elastomer or the like, is charged electrically (I) and sprayed (II) in an electrical field (E) to a three-dimensional mould ( )/target ( ). The method of the invention makes use of the mould ( )/target ( ) set at an electric potential and provided with two or more treatment blocks (Li) to be set at voltage levels different from each other, especially for coordinating the courses of sprayed material particles and the electrical field (E) affecting the same, in such a manner that each section/area of the mould/target surface forms a material layer of desirable thickness in the spraying cycle (II). The invention relates also to an apparatus operating in accordance with the method.