The ink jet printer has a head unit with a base (22) of glass or similar material and this has heating elements (23) coupled to control electrodes (24) and a common electrode (25). The electrodes are of Al,Ac,Ag, Pt or Cu. A protective layer protects the surface of the electrodes agaisnt ink. Positioned above the electrode arrangement is a protective layer of plastic, and a spacer (32) with formed chambers provides a mounting for the nozzle plate (33). When heat energy is applied air bubbles are formed on each heating element. These rapidly expand and cause ink droplets to be discharged through the nozzles (34). ADVANTAGE - Improved reliability of ink droplet generation.

Verfahren zum tintenstrahldrucken sowie schreibkopf fuer einen tintenstrahldrucker

Ink bubble jet printer - has multiple nozzles each with associated heating electrode to generate air bubble causing rapid discharge of defined ink droplet

An ink for a thermal ink jet printer comprises two fluids, X and Y. The X fluid is selected for its vapor bubble characteristics and the Y fluid is selected so that the XY ink has certain desired printing medium characteristics. If the superheat limit of the XY ink is kept below the midpoint temperature between the boiling point and the superheat limit of the Y fluid, then the characteristics of the vapor bubble generated during ink droplet emission are dominated by the characteristics of fluid X.

Ink for thermal ink jet printers

Heizwiderstand sowie aufzeichnungskopf mit diesem widerstand und ansteuerungsverfahren hierfuer

PURPOSE:To provide an ink jet printer which can perform the high quality printing not depending on the paper quality of a recording paper and carry out the high speed drying and printing by pressure welding and heat drying the surface of a material to be recorded in an area just before printing by a belt type preheater and printing on the surface while vacuum suction carrying is carried out for the material to be recorded in the heat drying. CONSTITUTION:Materials 6 to be recorded are heated successively by a belt type preheater 2 just before printing, and in the case the material 6 to be recorded is a recording paper, the water content included therein is steam dispersed, suction fixed to a porous carrying belt 34 of a vacuum suction carrier 3 while the temperature is lower to some extent, and carried right unclear a full color line head 1. The recording paper fed into the preheater after five seconds from the start of energization is heated to 100-110 deg.C, and the water content is dispersed quickly and almost completely dried paper of 90-100 deg.C is carried under the full color line head 1. Even when the paper is put through the material to be recorded of narrow width, excessive electric current flows through PTC heater exclusively for the temperature lowered area because of the insertion of paper to recover the lowered temperature and uniformize the temperature all over the area.

Ink jet printer

Verfahren und vorrichtung zur fluessigkeitsstrahl-aufzeichnung

A thermal head consists of a substrate with a resistance heating element on the substrate and electrical conductors to carry the current to the heating element The resistance heating element consists of a metal boride, pref Hf, Zr, La, Ta, V, Nb, W, Cr, Ti or Mo borides or their mixts Alternatively, the heating element contains a metal boride and oxygen The element may be coated with a layer of SiO2 and/or a protective layer of Ta2O5, Al2O3, MgO, or ZrO2 The substrate pref consists of a glazed base of a material with good thermal conductivity and a glass layer On this glazed base is another glass layer consisting of a glass with low alkali content and a softening pt of 745 degrees C This glass layer may be quartz The thermal head is used for the thermal recording of information The specific resistance of the heating element mah be set to a high value The head is suitable for high speed printing and has a long operational life

Verfahren zum tintenstrahldrucken sowie schreibkopf fuer einen tintenstrahldrucker

Citations

Ink bubble jet printer - has multiple nozzles each with associated heating electrode to generate air bubble causing rapid discharge of defined ink droplet

Ink for thermal ink jet printers

Heizwiderstand sowie aufzeichnungskopf mit diesem widerstand und ansteuerungsverfahren hierfuer

Ink jet printer

References

Verfahren und vorrichtung zur fluessigkeitsstrahl-aufzeichnung

Head for thermal printing with stable resistance - obtd. by sputtering a metal boride resistance heating element onto a glazed substrate