EP 0989214 B1 20030423 - Method and apparatus for removing foreign substances from fiber material, especially from raw cotton
Title (en)
Method and apparatus for removing foreign substances from fiber material, especially from raw cotton
Title (de)
Verfahren und Vorrichtung zum Ausscheiden von Fremdstoffen in Fasermaterial, insbesondere in Rohbaumwolle
Title (fr)
Procédé et appareil pour éliminer les corps étrangers de la matière fibreuse, en particulier du coton brut
Publication
Application
Priority
EP 98810885 A 19980907
Abstract (en)
[origin: EP0989214A1] To separate dirt and impurities and other debris from fiber materials, and especially raw cotton, a sensor system (2) is used to detect the foreign matter in the fiber flow channel (1) carried in an air stream. The sensor triggers a mechanism to eject the foreign matter by air bursts to blow it through an opening (7) into a waste collection container (8). The sensor system (2) to detects foreign matter in the fiber flow channel (1) carried in an air stream. The sensor triggers a mechanism to eject the foreign matter by air bursts to blow it through an opening (7) into a waste collection container (8). The volume of the waste collection container (8) is increased at least during the duration of an air pulse, or air is extracted from the container (8) through an air suction opening (11). An air movement system is activated to extract a volume of air from the collection container (8), and the extracted air is returned to the fiber flow channel (1) or it is passed into an outflow channel (20). An underpressure source is connected to the waste collection container, for the air extraction by suction. The volume increase or air extraction at the waste collection container (8) is triggered by the sensor system (2), and the action is maintained for the duration of a compressed air burst. An Independent claim is included for a fiber cleaning assembly, where the waste collection container (8) has a system to increase its volume or extract air (14) from it temporarily, to compensate for the volume of air blown into it while foreign matter is ejected from the fiber flow channel. Preferred Features: The waste collection container (8) is linked to the underpressure source through a controlled barrier (15). A control (12) activates the operating units, in response to signals from the sensor system (2). At least one flow guide plate (10) is within the waste collection container (8).
IPC 1-7
IPC 8 full level
D01G 31/00 (2006.01)
CPC (source: EP)
D01G 31/003 (2013.01)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0989214 A1 20000329; EP 0989214 B1 20030423; DE 59808078 D1 20030528
DOCDB simple family (application)
EP 98810885 A 19980907; DE 59808078 T 19980907