Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Reexamination Certificate
2002-06-13
2010-02-02
Sorkin, David L (Department: 1797)
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
C425S204000
Reexamination Certificate
active
07654725
ABSTRACT:
The invention relates to a multiple-screw extruder that comprises a first process chamber (1) and a second process chamber (2). In the degassing zones of said extruder, at least the first process chamber is provided with at least one degassing opening. The radius R of the conveyor element in the degassing zones, in at least one conveyor element (7; 9) of at least one screw (5, 7; 5, 9) configured as a passage screw, in a subsection configured as a passage subsection (71a, 71e; 91a, 91e), along the peripheral direction of the at least one conveyor element (7; 9) is by ΔR smaller than the full radius Rv of the conveyor element (6; 8) required for the mutual stripping of adhering product in a closely intermeshing screw operation with die adjacent conveyor elements (6; 8) of adjacent conventional screws (5, 6; 5, 8). The invention also relates to a method for degassing viscous or elasticoviscous flowable masses in such a multi-screw extruder having several process chambers, the respective process chambers communicating by means of a connecting opening.
REFERENCES:
patent: 1356296 (1920-10-01), La Casse
patent: 2968836 (1961-01-01), Colombo
patent: 3104420 (1963-09-01), Selbach
patent: 3254367 (1966-06-01), Erdmenger
patent: 3310837 (1967-03-01), Wittrock
patent: 4300839 (1981-11-01), Sakagami
patent: 5743178 (1998-04-01), Babbini
patent: 5836682 (1998-11-01), Blach
patent: 6190031 (2001-02-01), Blach et al.
patent: 6838496 (2005-01-01), Goedicke et al.
patent: 7040798 (2006-05-01), Innerebner et al.
patent: 7080935 (2006-07-01), Innerebner et al.
patent: 2004/0094862 (2004-05-01), Sturm et al.
patent: 198 54 689 (2000-06-01), None
patent: 0 788 868 (1997-08-01), None
Christel Andreas
Innerebner Federico
Schweikle Jürgen
Sturm Achim-Phillipp
Buhler AG
Carella Byrne Bain et al.
Hand Francis C.
Sorkin David L
LandOfFree
Degassing of flowable masses in a multiple-screw extruder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Degassing of flowable masses in a multiple-screw extruder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Degassing of flowable masses in a multiple-screw extruder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4175697