EP 0590165 B1 19970226 - Electrostatic nozzle, in particular for injecting high-viscosity liquids
Title (en)
Electrostatic nozzle, in particular for injecting high-viscosity liquids
Title (de)
Elektrostatikdüse, insbesondere zum Ausspritzen hochviskoser Flüssigkeiten
Title (fr)
Buse électrostatique, en particulier pour injecter des matériaux fluides à haute viscosité
Publication
Application
Priority
EP 92116182 A 19920922
Abstract (en)
[origin: EP0590165A1] The invention relates to an electrostatic nozzle for the production of printing screens which are used in particular in the field of the textile industry. Said printing screens consist of a fine-meshed screen (1) bearing a pattern. The pattern is produced by spraying a highly viscous masking liquid with the aid of the electrostatic nozzle only at those points on the screen (1) at which the screen (1) has to be covered for the purposes of the pattern and leaving those parts of the screen (1) uncovered at which the screen has to remain permeable. To be able to spray the highly viscous masking liquid, a plunger (31) projects into a spray channel (30) of the nozzle (2), which plunger is excited to high-frequency oscillation. From the intense disturbances thus caused, there result pronounced regular constrictions, corresponding to the oscillation frequency, of the liquid jet leaving the spray channel, so that, outside the spray channel, drops can very rapidly form as a result of the surface tension of the liquid. This leads to a short overall length of the nozzle. <IMAGE>
IPC 1-7
IPC 8 full level
B05B 5/025 (2006.01); B05B 17/06 (2006.01); B41C 1/14 (2006.01)
CPC (source: EP)
B05B 5/025 (2013.01); B05B 17/0607 (2013.01); B41C 1/147 (2013.01)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI
DOCDB simple family (publication)
EP 0590165 A1 19940406; EP 0590165 B1 19970226; AT E149102 T1 19970315; DE 59208075 D1 19970403; ES 2099187 T3 19970516
DOCDB simple family (application)
EP 92116182 A 19920922; AT 92116182 T 19920922; DE 59208075 T 19920922; ES 92116182 T 19920922