Pelikan Produktions Ag

Pelikan Hardcopy Production Ag

Joachim Kretschmer

Joachim Heinzl

Alfred Zollner

Daniel Sulser

Roland Steiner

Luzius Betschon

Peter M&ouml;stl

André Huber

Gerhard Beurer

Alfred Wirch

Markus B&uuml;rgin

Philippe Georges Locher

René Butty

Migjen Rahimi

A system is provided for registration of a fluid level of a fluid in the fluid chamber of an invention-specific receptacle ( ), in particular of ink in an ink cartridge, with a light source ( ) which beams into the chamber of the receptacle, a reflection body ( ) which is designed as a float, which moves in the chamber of the receptacle in dependency upon the filling level of the fluid and which variably reflects the light in dependency upon its movement, and a light detector ( ) which receives a variable amount of light.

System for registration of a fluid level in a receptacle

The printhead has a multitude of adjacently arranged channels with piezo-electrical shear converters. The impulse form for activation of the converters&mdash;depending upon the number of simultaneously activated neighboring channels&mdash;is changed in such manner that the exit velocity of the ink droplets is constant. This makes it possible to obtain a better print image.

Method of controlling piezo elements in a printhead of a droplet generator

Process for re-coding of print heads equipped with electronic codings, whereby the coding of an original print head A is altered in such manner that it is identical to that of another print head B. This is attained by interruption of conductive connections between contacts and the placement of new conductive connections between contacts of the print head A in accordance with the conductive connections of print head B. The re-coding can be designed in reversible as well as irreversible form.

Re-coding of ink print heads

The device has a current supply (1) connected to a control unit (2) including operating keys (3). The operating keys (3) provide for the inputting of a selectable dose amount or dosage per time unit or dose period. A liquid reservoir (5) stores fluid to be expelled. A droplet generator (8) includes a plurality of jets (13) connected to piezo-electrical or thermo-electrical converters which generate heat. Each jet and associated converter is individually controlled by the control unit. The device provides exact dosing of extremely small amounts of liquid, for example in the medicinal field, specifically with respect to inhalators or infusion instruments.

Device for dosing of liquid

Growing community of inventors

Rüti, Switzerland

Joachim Kretschmer