Dover Europe Sarl

Imaje

Alain Pagnon

Joao Paulo Ribeiro

Pierre Rieuvernet

A device for measuring the flow rate and viscosity of ink sent to a print head of an ink jet printer comprises: a restriction of the diameter of a conduit for the flow of ink arranged in the path thereof defined by the conduit; a sensor for measuring the pressure difference (P-P) between the pressure of fluid upstream of the restriction and the pressure of ink downstream of the restriction; a viscous leak, creating a pressure drop by friction loss, the viscous leak being in series with the restriction, in the path of the ink defined by the conduit; a sensor for measuring the pressure difference (P-P) between the pressure of fluid upstream of the viscous leak and the pressure of ink downstream of the viscous leak; and a circuit for calculating the flow rate and viscosity of ink as a function of: (P-Pand (P-P).

Device for measuring the flow rate and the viscosity of ink and use thereof in a printer

A device () for measuring the flow rate of ink sent to a print head of an ink jet printer, comprising: a restriction () of the diameter of the flow of ink, arranged in the path thereof, sensors () for measuring the pressure difference (P&#x2212;P), between the pressure of fluid upstream of the restriction (P) and the pressure of ink downstream of the restriction (P).

Flow meter and use thereof in a printer

A device () for measuring the flow rate and the viscosity of ink sent to a print head () of an ink jet printer, comprising: a conduit (), for supplying the print head (), this conduit being provided with a 1pressure (Pin) sensor () at a first end and a 2pressure (PHead) sensor () at a 2end, circuit or controller () for measuring at least the pressure (PHead) of the 2pressure sensor () and the pressure difference (Pin&#x2212;PHead) between the 1pressure sensor () and the 2pressure sensor ().

Device for measuring flow rate and viscosity and use thereof in a printer

The invention relates to an ink and/or solvent cartridge () for an industrial printer, such a cartridge including at least one semi-rigid or deformable volume (), being provided with an aperture (), and having a given maximum capacity VCmax, and holding a hermetically enclosed volume of liquid comprising an ink and/or a volatile solvent, and a gas volume, the sum of these 2 volumes being lower than the maximum capacity VCmax, and in the whole temperature range between 10&#xb0; C. and 35&#xb0; C. and for a 1 bar pressure.

Cartridge without an inadmissible overpressure

Disclosed is a method to optimize the operation of an ink-jet printer provided with a circuit to collect the ink not used for the printing, comprising a gutter connected to an imperviously sealed ink tank by a conduit placed in a state of depression by a constant flow pump checking the flow rate of ink in the conduit by the measurement of the pressure in the ink tank and controlling the operation of the pump either at its minimum suction rate compatible with efficient collection of the ink or at its maximum suction rate during anomalies of collection.

Method to optimize the operation of an ink-jet printer, and a printer

An accumulating chamber has its fluid pressure regulated between the pressure of a given source pressure value and a discharge pressure value. Electronic control of the accumulating chamber pressure is accomplished by a regulator having a transfer volume and first, second, and third solenoid valves. The transfer volume is connected to the accumulating chamber by the first solenoid valve. The second solenoid valve connects the transfer volume to a pressure source at the given source pressure value. A third solenoid valve connects the transfer volume to open air. A pressure sensor measures the pressure in the accumulating chamber and is connected to an electronic control system.

Growing community of inventors

Bourg les Valence, France

Alain Pagnon