 |
|
|
|
|
|
 Title: |
US6136246:
Screw extruder with improved dispersive mixing elements
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Rauwendaal, Chris J.; Los Altos Hills, CA
Gramann, Paul J.; Madison, WI
Davis, Bruce A.; Oregon, WI
Osswald, Tim A.; Madison, WI
|
| Assignee: |
Rauwendaal Extrusion Engineering, Los Altos Hills, CA
other patents from RAUWENDAAL EXTRUSION ENGINEERING, INC. (754520) (approx. 3)
News, Profiles, Stocks and More about this company
|
| Published / Filed: |
2000-10-24
/ 1999-02-01
|
| Application Number: |
US1999000241822
|
| IPC Code: |
Advanced:
B29C 47/00;
B29C 47/38;
B29C 47/40;
B29C 47/60;
B29C 47/62;
B29C 47/64;
B29C 47/66;
Core:
B29C 47/58;
more...
IPC-7:
B29C 47/60;
B29C 47/62;
B29C 47/66;
|
| ECLA Code: |
B29C47/38; B29C47/38F2; B29C47/38J2; B29C47/40A; B29C47/60B; B29C47/60D; B29C47/60F; B29C47/62C; B29C47/64B; B29C47/64B3; B29C47/64H; B29C47/66;
|
| U.S. Class: |
Current:
264/211.21;
264/211.23;
264/349;
366/079;
366/081;
366/084;
366/085;
366/089;
366/300;
366/301;
366/318;
366/319;
366/322;
366/323;
366/324;
425/200;
425/204;
425/208;
425/209;
Original:
264/211.21;
264/211.23;
264/349;
366/079;
366/081;
366/084;
366/085;
366/089;
366/300;
366/301;
366/318;
366/319;
366/322;
366/323;
366/324;
425/200;
425/204;
425/208;
425/209;
|
| Field of Search: |
264/211.21,211.23,349
425/200,204,208,209
366/079,81,84,85,89,300,301,318,319,322,323,324
|
| Priority Number: |
| 1999-02-01 |
US1999000241822 |
|
| Abstract: |
A screw extruder (10) having a barrel (18) which has a bore (26) defining an inner surface (44) and one or more extruder screws (28), positioned within the bore (26). The extruder screw or screws (28) include a central shaft (34) and one or more screw flights (30). The extruder screw or screws (28) farther including one or more dispersive mixing elements (204), (234), (308), (406), (508), (558), which interact with the inner surface of the barrel (44) to form one or more progressively narrowing passages (46) through which material is forced into multiple regions of high elongational and shear stress (480, (120), (214), (310), (410), (510), (564).
A second preferred embodiment is a screw extruder (10) having a barrel (18) having a bore (26) defining an inner surface (44) and one or more extruder screws (600), (701), positioned within the bore (26). The extruder screw or screws (600), (701) include a central shaft (602), (706) and a number of dispersive mixing elements (604), (608), (714), which are configured and positioned to form a number of progressively narrowing passages (606), (716) through which material is forced into multiple regions of high elongational and shear stress (608), (718).
|
| Attorney, Agent or Firm: |
Guernsey, Larry B.Hickman Stephens Coleman & Hughes, LLP ;
|
| Primary / Asst. Examiners: |
Tentoni, Leo B.;
|
| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
|
|
|
|
|
|
|
| Foreign References: |
None
|
| Other Abstract Info: |
DERABS C1999-327287
|
| Other References: |
Cheremisinoff, Nicholas P.; "Polymer Mixing and Extrusion Technology" (1987, Marcel Dekker, Inc.), pp. 372-375.
Levy, Sidney; "Plastics Extrusion Technology Handbook, second edition" (1989, Industrial Press Inc.), pp. 14-15 and 82-93.
Rauwendaal, Chris J.; "Polymer Extrusion, 3rd rev. ed." (1994, Carl Hanser Verlag), pp. 322-323, 332-333, 416-417, and 432-433.
|
|
 Nominate this for the Gallery...
|
|
