El.en. S.p.a.

Hunkeler.it S.r.l.

Consiglio Nazionale Delle Ricerche

Elesta S.p.a.

Giovanni Masotti

Leonardo Masotti

Luca Breschi

Angelo Bove

Carlo Giovannucci

Quirino Fausto Sestini

Quirino Sestini

Fabio Andreola

Marina Mazzoni

Lorenzo Capineri

A method for making laser engravings on a web of paper, including prearranging a paper web conveying device; defining a working area along a path of the web; prearranging an emitter of laser pulses; prearranging a movable pointing device, selecting an engraving pattern to be engraved on the web; calculating an instruction file containing pointing instructions; selecting an emission power of the emitter of laser pulses; emitting laser pulses through the emission power; and operating the movable pointing device according to the instruction file.

Method and an apparatus for making laser engravures on a moving web

The optical device for determining the angular position of a rotating element comprises: a concave mirror () integral to one rotating element (); an electromagnetic radiation emitter (); at least one electro-optical detector (R,L). The concave mirror, the emitter, and the detector are arranged in such a way that at least a part of the radiation emitted by said emitter is focused by the concave mirror on said at least one detector. The detector produces a signal, which can vary as a function of the position in which the radiation is focused by the mirror on the detector.

Reflection optical sensor for determining the angular position of a rotating element

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Sesto Fiorentino, Italy

Giovanni Masotti