EP 0263278 A3 19881207 - PROCESS FOR PRODUCING OXIDE CATHODE WIRES BY CATAPHORESIS COATING
Title (en)
PROCESS FOR PRODUCING OXIDE CATHODE WIRES BY CATAPHORESIS COATING
Publication
Application
Priority
DE 3630224 A 19860905
Abstract (en)
[origin: US4806218A] Oxide cathode wires are produced by coating tungsten wires with emissive material by cataphoretic coating. It is important for the coating to have a substantially uniform thickness over the entire surface of the wire. This is achieved in a simple manner by reversing the polarity of the direction of current flow for a short time at the beginning of the coating process, so that the tungsten wire to be coated is connected as an anode. The remainder of the coating process is performed in a known manner with a tungsten wire connected as a cathode.
IPC 1-7
IPC 8 full level
C25D 13/02 (2006.01); C25D 13/16 (2006.01); H01J 9/04 (2006.01)
CPC (source: EP US)
C25D 13/02 (2013.01 - EP US); C25D 13/16 (2013.01 - EP US)
Citation (search report)
[X] FR 2149561 A1 19730330 - PHILIPS NV
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0263278 A2 19880413; EP 0263278 A3 19881207; DE 3630224 A1 19880317; DE 3630224 C2 19940105; JP H0426174 B2 19920506; JP S6376228 A 19880406; US 4806218 A 19890221
DOCDB simple family (application)
EP 87112194 A 19870822; DE 3630224 A 19860905; JP 21929187 A 19870903; US 9340687 A 19870904