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:
Jun. 06, 2006
Filed:
Jan. 24, 2005
Kazuyoshi Kurashima, Yokohama, JP;
Yoshiteru Sumi, Ichihara, JP;
Yasuo Etoh, Chiyoda-ku, JP;
Kumiko Minezaki, Yokohama, JP;
Daisuke Ninomiya, Yokohama, JP;
Kazuyoshi Kurashima, Yokohama, JP;
Yoshiteru Sumi, Ichihara, JP;
Yasuo Etoh, Chiyoda-ku, JP;
Kumiko Minezaki, Yokohama, JP;
Daisuke Ninomiya, Yokohama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
The present invention provides a continuous resin recovery method for recovering resin from which foreign matters and volatile components are sufficiently removed and which is highly purified and suitable for optical use. The continuous resin recovery method comprises heating a resin solution in a heating pipe at a temperature at least the boiling point of the solvent, introducing the resin solution heated at a temperature at least the boiling point of the solvent into a rough drying chamber maintained at a reduced pressure, separating the resin from the solvent vapor in the rough drying chamber, melting the separated resin, introducing the molten resin in a precise drying chamber kept at a reduced pressure, and passing the molten resin through a perforated plate in the precise drying chamber.