Olivetti Lexikon S.p.a.

Franco Fabbri

Enrico Manini

Pier Luigi Soriani

An ink-jet print head (12) for a dot printer, in which the drops of ink are expelled from one or more expulsion chambers (16) through corresponding pluralities of nozzles (30), each plurality communicating with each individual chamber. The nozzles (30) communicating with each chamber may be three to nine in number and are suitably arranged so as to obtain a high print quality in particular for the printing of characters with straight edges free from irregularities.

Ink-jet print head with multiple nozzles per expulsion chamber

A parallel thermal ink jet printing device is produced by assembling a plurality of modules on a frame or base plate. Each of the modules is tested beforehand both from the electrical point of view and from the hydraulic point of view. In order also to allow for testing from the hydraulic point of view, each module is provided with an associated respective reservoir capable of being filled with a certain quantity of ink before the said module is assembled with the rest of the device. The reservoir preferably forms an appendix to the module capable of being inserted in a corresponding opening formed in the frame of the device so as to allow for precise alignment of the ink ejection nozzles provided on the various modules.

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Pavone, Italy

Franco Fabbri