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:
Dec. 20, 2011
Filed:
Mar. 24, 2011
Carl-gustaf Ek, Vastra Frolunca, SE;
Yutaka Mizutani, Hiroshima, JP;
Takayuki Yamazawa, Hiroshima, JP;
Junichi Iwai, Hiroshima, JP;
Shigeki Inoue, Hiroshima, JP;
Arne Syre, Strathelle, NO;
Jari Aarila, Porvoc, FI;
Carl-Gustaf Ek, Vastra Frolunca, SE;
Yutaka Mizutani, Hiroshima, JP;
Takayuki Yamazawa, Hiroshima, JP;
Junichi Iwai, Hiroshima, JP;
Shigeki Inoue, Hiroshima, JP;
Arne Syre, Strathelle, NO;
Jari Aarila, Porvoc, FI;
Borealis Technology Oy, Porvoo, FI;
Japan Steel Works, Ltd., Hiroshima, JP;
Abstract
A screw extruder having a body forming a chamber of two barrels housing two counter-rotating axis-parallel rotors, a supply port for the material to be mixed in the chamber at one end of the body, a discharge port for discharging the mixed material at the other end of the body, a conveying section with screws for feeding the material from the supply port downstream to a mixing section which comprises at least two mixing zones, each mixing zone having at least one forward-conveying wing and at least one backward-conveying wing downstream of the forward-conveying wing on each rotor characterized in that a throttle valve is provided in the chamber downstream of the mixing section, and downstream of the throttle valve a second conveying section with screws and a second mixing section are provided.