Patents by Inventor Renato Comotto
Renato Comotto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11434101Abstract: Piloted electromagnetic brake for controlling the tension of the weft threads in weaving machines, in particular of a weft thread which has a high number of knots, of the type including a pair of opposite elastic thin plates between which the weft thread runs, an operated thin plate being adjusted in position by an electromagnetically controlled operating piston, and a resisting thin plate being resistant against an elastic contrast unit, in order to control the intensity of the contrast force between the pair of thin plates. The resisting thin plate and the operated thin plate have fulcrum points in correspondence of a central portion thereof, so as to be able to freely oscillate in a plane containing the weft thread, during the passage of a knot between them, and the fulcrum points are offset by a set length along the weft thread running direction.Type: GrantFiled: October 14, 2016Date of Patent: September 6, 2022Assignee: ROJ S.R.L.Inventors: Renato Comotto, Matteo Fazzari, Paolo Ricci
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Patent number: 11208759Abstract: A reflection optical sensor (F1-F4) for the detection of a weft thread in a weaving weft feeder (P) comprises a light emitter (1) and a light receiver (2) assembled on a relative supply printed circuit board (3) and housed in an arm (A) of the weft feeder which projects towards the front part of the weft feeder (P) and extends alongside the weft feeder drum (D) whereon the weft thread coils are wound, so as to form a path of direct light radiation, from said light emitter (1) towards a respective reflective surface (R) placed on said drum (D), and of reflected light radiation, from said reflective surface (R) to said light receiver (2), for detecting the presence/absence of a weft thread running through said path. Said light emitter (1) and light receiver (2) are assembled with mutually parallel optical axes on said supply printed circuit board (3).Type: GrantFiled: September 4, 2019Date of Patent: December 28, 2021Assignee: ROJ S.R.L.Inventors: Renato Comotto, Enzo Dandolo, Matteo Fazzari
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Publication number: 20200080257Abstract: A reflection optical sensor (F1-F4) for the detection of a weft thread in a weaving weft feeder (P) comprises a light emitter (1) and a light receiver (2) assembled on a relative supply printed circuit board (3) and housed in an arm (A) of the weft feeder which projects towards the front part of the weft feeder (P) and extends alongside the weft feeder drum (D) whereon the weft thread coils are wound, so as to form a path of direct light radiation, from said light emitter (1) towards a respective reflective surface (R) placed on said drum (D), and of reflected light radiation, from said reflective surface (R) to said light receiver (2), for detecting the presence/absence of a weft thread running through said path. Said light emitter (1) and light receiver (2) are assembled with mutually parallel optical axes on said supply printed circuit board (3).Type: ApplicationFiled: September 4, 2019Publication date: March 12, 2020Inventors: Renato Comotto, Enzo Dandolo, Matteo Fazzari
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Publication number: 20180312367Abstract: Piloted electromagnetic brake for controlling the tension of the weft threads in weaving machines, in particular of a weft thread which has a high number of knots, of the type including a pair of opposite elastic thin plates between which the weft thread runs, an operated thin plate being adjusted in position by an electromagnetically controlled operating piston, and a resisting thin plate being resistant against an elastic contrast unit, in order to control the intensity of the contrast force between the pair of thin plates. The resisting thin plate and the operated thin plate have fulcrum points in correspondence of a central portion thereof, so as to be able to freely oscillate in a plane containing the weft thread, during the passage of a knot between them, and the fulcrum points are offset by a set length along the weft thread running direction.Type: ApplicationFiled: October 14, 2016Publication date: November 1, 2018Inventors: Renato COMOTTO, Matteo FAZZARI, Paolo RICCI
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Patent number: 7896279Abstract: A yarn braking device includes a braking body with the shape of a frustocone coat. The braking body is put over a rounded withdrawal end of a storage body and is pressed from the small diameter end by a resilient axial force against the withdrawal end. The axial force defines the braking effect between the braking body and the withdrawal end. Between a stationary holder and the braking body an axial force generator and a centering device acting in radial direction are provided. The axial force generator is formed by at least one pair of permanent magnets. The permanent magnets are axially aligned by the centering devices with an intermediate gap. The centering device neither is an axial sliding guiding system structurally and functionally separated from the pair of permanent magnets, or is formed free of contact directly by the pair of permanent magnets, respectively.Type: GrantFiled: April 28, 2005Date of Patent: March 1, 2011Assignee: IRO ABInventors: Renato Comotto, Kurt Arne Gunnar Jacobsson
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Patent number: 7661621Abstract: The invention relates to a thread tensioner comprising tensioning elements that define a thread tensioning zone. In said tensioner, the first tensioning element rests on a stop and the second tensioning element can be pressed against the first tensioning element by means of an adjustable magnet contact force produced by a magnet armature and a repelling magnet actuator. The stop is located on the opposite side of the thread tensioning zone from the first tensioning element. The first tensioning element is stressed by a spring force in the direction of the second tensioning element against the stop. Said spring force is greater in the thread tensioning zone than the respectively adjusted maximum magnetic contact force. The mass of the first tensioning element is smaller than the mass of the magnet armature.Type: GrantFiled: September 7, 2005Date of Patent: February 16, 2010Assignee: IRO ABInventor: Renato Comotto
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Publication number: 20080296425Abstract: The invention relates to a yarn tensioning device (B) comprising a braking body (K) embodied in the form of a truncated conical jacket (3) which is coaxially positioned on the rounded discharge end (2) of a storage body (1) and is pushed to a small diameter end (5) by the elastic axial force defining a braking effect between the braking body and the discharge end (2), an axial force generator (P) disposed between a fixed holding element (10) and the braking body and a centering device (C) provided with a radial working direction and disposed between the holding element (10) and the braking body, wherein said axial force generator (P) consists of at least one pair of axially superimposed permanent magnets, an intermediate slit is arranged between said permanent magnets and the centering device (C) which is embodied in the form of a axial slide guideway (9, 12, 24, 23) which is structurally and functionally separated from the permanent magnet pair or contactlessly formed thereby.Type: ApplicationFiled: April 28, 2005Publication date: December 4, 2008Applicant: IRO ABInventors: Renato Comotto, Kurt Arne Gunnar Jacobsson
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Publication number: 20080257994Abstract: The invention relates to a thread tensioner comprising tensioning elements that define a thread tensioning zone. In said tensioner, the first tensioning element rests on a stop and the second tensioning element can be pressed against the first tensioning element by means of an adjustable magnet contact force produced by a magnet armature and a repelling magnet actuator. The stop his located on the opposite side of the thread tensioning zone from the first tensioning element. The first tensioning element is stressed by a spring force in the direction of the second tensioning element against the stop. Said spring force his greater in the thread tensioning zone than the respectively adjusted maximum magnetic contact force. The mass of the first tensioning element his smaller than the mass of the magnet armature.Type: ApplicationFiled: September 7, 2005Publication date: October 23, 2008Inventor: Renato Comotto
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Patent number: 5944272Abstract: A bobbin core holder for a bobbin creel. The bobbin core holder includes a sleeve body securable on a creel rod, on which sleeve body a ring socket is fitted so as to be rotatable into at least one predeterminable rotary position by a releasable spring detent mechanism. The bobbin core holder also includes a bearing block on the ring socket having a bore therein for the bobbin core and an additional threaded bore opening into the bobbin core bore for a set screw. The bobbin core bore is open at both ends and is circumferentially closed with its axis extending transversely with respect to the axis of the ring socket. The bobbin core bore has an intermediate longitudinal section which at least partly extends through the ring socket, and the length of the bobbin core bore is approximately the same as the outside diameter of the ring socket. The threaded bore extends approximately radially relative to the ring socket axis.Type: GrantFiled: June 1, 1998Date of Patent: August 31, 1999Assignee: IRO ABInventors: Renato Comotto, Joachim Fritzson