EP 0142265 A1 19850522 - Hydraulic systems for ink jet printers.
Title (en)
Hydraulic systems for ink jet printers.
Title (de)
Hydraulische Systeme für Tintenstrahldrucker.
Title (fr)
Systèmes hydrauliques pour imprimantes à jet d'encre.
Publication
Application
Priority
GB 8327999 A 19831019
Abstract (en)
A hydraulic system, suitably an ink supply system for an ink jet printer, wherein an upstanding tube (59) of a viscometer (55) is connected to supply line for liquid and a ball is movably upwardly and downwardly within the tube. A valve (57) controls a flow of liquid from the supply line to the tube (59). Control means cause the valve to open and allow liquid to flow into the tube so that the ball (58) is moved to an upper part of the tube. The valve is then closed and the time taken for the ball to fall through a predetermined distance through liquid within the tube is determined. This line represents the viscosity of the liquid within the system. If the value of viscositv determined from the time taken for the ball to descend is different from an optimum value, the control means operating a charging means which add a component to the liquid so as to move the viscosity towards the optimum value.
IPC 1-7
IPC 8 full level
B41J 2/175 (2006.01)
CPC (source: EP)
B41J 2/175 (2013.01)
Citation (search report)
- DE 3111987 A1 19820107 - SHARP KK [JP]
- DE 3125194 A1 19820304 - SHARP KK [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0142265 A1 19850522; EP 0142265 B1 19880921; DE 142265 T1 19860227; DE 3474124 D1 19881027; GB 8327999 D0 19831123
DOCDB simple family (application)
EP 84306916 A 19841010; DE 3474124 T 19841010; DE 84306916 T 19841010; GB 8327999 A 19831019