Nuovo Pignone Spa

Smit Textile S.p.a.

Roberto Capitanio

Gianluigi Sora

Lucio Sardella

Paolo Roso

Zanrosso Mauro

Tullio Deserti

Weaving loom

A weft cutter for an air loom in which a movable blade is hinged to the ram of a pneumatic cylinder which is pneumatically fed through a solenoid valve provided at its inlet with a pressure regulator. The ram is kept in a rest position by a return spring and the solenoid valve is directly piloted from a loom control console.

Weft cutter for air loom which is controllable as a function of weaving

A main nozzle for an air jet loom has an outer casing and is provided with a compressed air introduction duct and a mixing chamber. A mixer tube provided with an annular distributor ring is inserted into the outer casing to form with the outer casing and annular distribution chamber upstream of the distributor ring and, downstream of the distributor ring, and annular accceleration chamber which feeds into the mixing chamber. The distributor ring has annularly arranged blowing slots. The acceleration chamber is formed by an outer conical wall provided on a portion of the inside of the outer casing and an inner conical wall provided on a portion of the mixing tube. The tapered walls of the annular acceleration chamber optimize the air jet used for inserting the weft into the shed. The inclination of the taper of the outer wall of the nozzle annular acceleration chamber is 12.degree.-16.degree., and that of the inner wall is 4.degree.-8.degree.. In the preferred embodiment, the taper of the outer wall is 15.degree. and that of the inner wall is 7.degree..

Main nozzle accelerator chamber for an air-jet loom

A reed for an air-jet loom which includes an entry flare allowing several main nozzles to be used. The reed has an inclination of the lower surface of an air guide channel, and an advantageous spacing between the binding spirals which support upper and lower ends of the reeds. The arrangement provides for effective, reliable multi-weft weaving, and can increase the weaving efficiency of the loom, particularly when weaving yarns with irregularities. In a preferred embodiment, the distance between the two binding spirals is approximately 81 mm, with the lower surface of the entry flare having an inclination of approximately 6.degree. with respect to a normal to the rear surface of the channel.

Airguide channel geometry for air jet loom

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Castegnero, Italy

Roberto Capitanio