EP 3867427 A1 20210825 - CLOSED-LOOP PRESSURE CONTROL IN A DRAFTING SYSTEM
Title (en)
CLOSED-LOOP PRESSURE CONTROL IN A DRAFTING SYSTEM
Title (de)
DRUCKREGELUNG AN EINEM STRECKWERK
Title (fr)
RÉGULATION DE LA PRESSION DANS UN BANC D'ÉTIRAGE
Publication
Application
Priority
- DE 102018125547 A 20181015
- EP 2019074976 W 20190918
Abstract (en)
[origin: WO2020078651A1] In a closed-loop pressure control method for drafting system upper drums (125 - 28), an operating parameter which influences the load on a drafting system upper drum (125 - 128) is detected. In a sub-process, the pressure of the drafting system upper drum (125 - 128) is detected by means of the detected operating parameter and is displayed. The method enables a user to vary the pressure on the drafting system upper drum (125 - 128). The method may comprise ascertaining whether the detected operating parameter lies within a predetermined range or undershoots or overshoots a particular threshold value. If not, the pressure on the drafting system upper drum (125 - 128) is varied such that it is to be assumed that the stated condition is satisfied. A pressure drive portion (139; 132, 133; 134, 135; 141) of a drafting system apparatus (120) with drafting system (120) with multiple drafting system lower drums and upper drums and pressure arms (121 - 124) is configured to press a drafting system upper drum (125 - 128) against a drafting system lower drum (129 - 131) by means of a pressure arm (121 - 124). A controller (141) carries out the method by means of a pressure drive portion (139; 132, 133; 134, 135; 141) for a drafting system upper drum (125 - 128). The pressure drive portion (139; 132, 133; 134, 135; 141) has a pressure controller (141) connected between a pneumatic drive for the drafting system upper drum (125 - 128) and the associated pressure arm (121 - 124).
IPC 8 full level
D01H 5/52 (2006.01)
CPC (source: EP)
D01H 5/525 (2013.01)
Citation (search report)
See references of WO 2020078651A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102018125547 A1 20200416; CN 112840068 A 20210525; CN 112840068 B 20230428; EP 3867427 A1 20210825; WO 2020078651 A1 20200423; WO 2020078651 A9 20200611
DOCDB simple family (application)
DE 102018125547 A 20181015; CN 201980067433 A 20190918; EP 19772703 A 20190918; EP 2019074976 W 20190918