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1. WO2019059940 - DETECTING INK STATES FOR PRINTERS BASED ON MONITORED DIFFERENTIAL PRESSURES

Publication Number WO/2019/059940
Publication Date 28.03.2019
International Application No. PCT/US2017/053180
International Filing Date 25.09.2017
IPC
B41J 2/175 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005characterised by bringing liquid or particles selectively into contact with a printing material
01Ink jet
17characterised by ink handling
175Ink supply systems
CPC
B41J 2/175
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005characterised by bringing liquid or particles selectively into contact with a printing material
01Ink jet
17characterised by ink handling
175Ink supply systems ; ; Circuit parts therefor
B41J 2/17566
BPERFORMING OPERATIONS; TRANSPORTING
41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, ; e.g. INK-JET PRINTERS, THERMAL PRINTERS; , i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
2Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
005characterised by bringing liquid or particles selectively into contact with a printing material
01Ink jet
17characterised by ink handling
175Ink supply systems ; ; Circuit parts therefor
17566Ink level or ink residue control
Applicants
  • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. [US]/[US]
Inventors
  • JANSSEN, Matthew J.
  • COLE, James R.
  • RING, James W.
Agents
  • MORRIS, Jordan E.
  • PRUNER, JR, Fred G.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DETECTING INK STATES FOR PRINTERS BASED ON MONITORED DIFFERENTIAL PRESSURES
(FR) DÉTECTION D'ÉTATS D'ENCRE POUR IMPRIMANTES SUR LA BASE DE PRESSIONS DIFFÉRENTIELLES SURVEILLÉES
Abstract
(EN)
A technique includes coupling outlets of a first ink supply and a second ink supply together to provide ink to a printhead of a printer; and pressurizing the first ink supply and the second ink supply with air so that an air pressure of the first ink supply has a different air pressure than an air pressure of the second ink supply. The technique includes monitoring an ink-to-air differential pressure of the first ink supply or the second ink supply; and detecting an ink state for the printer based on the monitored ink-to-air differential pressure.
(FR)
L'invention concerne une technique comprenant le couplage des sorties d'une première alimentation en encre et d'une deuxième alimentation en encre ensemble pour fournir de l'encre à une tête d'impression d'une imprimante ; et la mise sous pression de la première alimentation en encre et de la deuxième alimentation en encre avec de l'air de telle sorte qu'une pression d'air de la première alimentation en encre soit différente d'une pression d'air de la deuxième alimentation en encre. La technique comprend la surveillance d'une pression différentielle encre-air de la première alimentation en encre ou de la deuxième alimentation en encre ; et la détection d'un état d'encre pour l'imprimante en se basant sur la pression différentielle encre-air surveillée.
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