Patents by Inventor Silvano Freti
Silvano Freti 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: 8883319Abstract: Improved coating blades are disclosed, as well as processes for manufacturing such blades. The inventive blades have an intermediate edge deposit effective to reduce heat transfer from a wear resistant top deposit to the blade substrate. In one embodiment, the intermediate layer is comprised of NiCr, possibly with embedded oxide particles. Suitably, the intermediate layer and the top deposit are applied by an HVOF process. It is also envisaged that the intermediate layer may be deposited by plasma spraying. The intermediate layer may comprise stabilized zirconia.Type: GrantFiled: June 29, 2006Date of Patent: November 11, 2014Assignee: BTG Eclepens S.A.Inventors: Silvano Freti, Jean Francois Laithier
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Patent number: 8048481Abstract: There is disclosed a method for the manufacture of coating or doctoring blades, wherein an elastomeric wear-resistant material at the blade tip is provided in a continuous process. During the manufacturing, the thickness of the applied elastomeric material is determined by winding the blade (containing the applied polymer composition) into a coil before the applied composition is fully cured. Successive turns of the coil are separated by a distance which is smaller than the initial thickness of the applied composition, such that the only partly cured composition is deformed by adjacent turns of the coil into the desired thickness and/or shape.Type: GrantFiled: December 21, 2005Date of Patent: November 1, 2011Assignee: BTG Eclepens, S.A.Inventors: Günter Bellmann, Silvano Freti
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Patent number: 7513976Abstract: A material for dewatering elements at the wet end of a paper-making machine is disclosed. The material comprises an elastomeric polymer matrix, and a filler added to the matrix at a level of 10 to 50 percent by weight, and the material has a hardness according to Shore A between 60 and 85. The invention also relates to a dewatering element comprising such material, and to the use of such material for the preparation of a dewatering element.Type: GrantFiled: November 17, 2004Date of Patent: April 7, 2009Assignee: BTG Eclepens, S.A.Inventors: Silvano Freti, Lothar Burchardt, Günter Bellmann
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Publication number: 20090053423Abstract: Improved coating blades are disclosed, as well as processes for manufacturing such blades. The inventive blades have an intermediate edge deposit effective to reduce heat transfer from a wear resistant top deposit to the blade substrate. In one embodiment, the intermediate layer is comprised of NiCr, possibly with embedded oxide particles. Suitably, the intermediate layer and the top deposit are applied by an HVOF process. It is also envisaged that the intermediate layer may be deposited by plasma spraying. The intermediate layer may comprise stabilized zirconia.Type: ApplicationFiled: June 29, 2006Publication date: February 26, 2009Applicant: BTG ECLÉPENS S.A.Inventors: Silvano Freti, Jean Francois Laithier
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Publication number: 20080050563Abstract: There is disclosed a method for the manufacture of coating or doctoring blades, wherein an elastomeric wear-resistant material at the blade tip is provided in a continuous process. During the manufacturing, the thickness of the applied elastomeric material is determined by winding the blade (containing the applied polymer composition) into a coil before the applied composition is fully cured. Successive turns of the coil are separated by a distance which is smaller than the initial thickness of the applied composition, such that the only partly cured composition is deformed by adjacent turns of the coil into the desired thickness and/or shape.Type: ApplicationFiled: December 21, 2005Publication date: February 28, 2008Inventors: Gunter Bellmann, Silvano Freti
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Patent number: 7244340Abstract: A blade for creping has been described. The blade according to the invention has a ceramic top layer covering the working edge of the blade, as well as the surface upon which the web impacts during creping. The ceramic top layer is a ceramic composition having a content of chromia. Preferably, the ceramic composition of the top layer comprises chromia-titania, with a titania content of up to 25% by weight, and preferably between 10% and 15% titania.Type: GrantFiled: March 24, 2004Date of Patent: July 17, 2007Assignee: BTG Eclepens S.A.Inventors: Jean Francois Laithier, Silvano Freti
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Publication number: 20070068646Abstract: A material for dewatering elements at the wet end of a paper-making machine is disclosed. The material comprises an elastomeric polymer matrix, and a filler added to the matrix at a level of 10 to 50 percent by weight, and the material has a hardness according to Shore A between 60 and 85. The invention also relates to a dewatering element comprising such material, and to the use of such material for the preparation of a dewatering element.Type: ApplicationFiled: November 17, 2004Publication date: March 29, 2007Inventors: Silvano Freti, Lothar Burchardt, Gunter Bellmann
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Publication number: 20050172889Abstract: A coating blade for the application of coating color onto a travelling web, the blade having an edge section with a profile conformed to the surface of the web when in engagement therewith is provided. The coating blade is characterized by a sacrificial layer covering at least the edge section and protecting the underlying edge section during the web loading phase. The invention also relates to a method of preparing a coating blade by applying a film forming solution onto an edge section of the blade, and allowing the solution to dry so as to form a solid film.Type: ApplicationFiled: July 11, 2003Publication date: August 11, 2005Inventors: Gunter Bellmann, Silvano Freti
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Publication number: 20050051292Abstract: A blade for creping has been described. The blade according to the invention has a ceramic top layer covering the working edge of the blade, as well as the surface upon which the web impacts during creping. The ceramic top layer is a ceramic composition having a content of chromia. Preferably, the ceramic composition of the top layer comprises chromia-titania, with a titania content of up to 25% by weight, and preferably between 10% and 15% titania.Type: ApplicationFiled: March 24, 2004Publication date: March 10, 2005Applicant: BTG Eclepens S.A.Inventors: Jean Laithier, Silvano Freti
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Patent number: 6733834Abstract: A process for the manufacture of a coating or doctoring blade comprising a band of steel or other form-stable material and a wear-resistant polymer coating applied on said band along a longitudinal edge section thereof subjected to wear, said process comprising the following steps: (a) providing continuous relative movement between said band and an application and treatment station; (b) continuously applying at said station a fast-curing polymer composition along said edge section; (c) allowing the applied composition to spread out so as to reach the very extreme of said edge section and then to cure to form an elastic and tacky-free coating; and, optionally (d) post-curing the coating at an increased temperature; as an alternative to such process there can be used a blade of double width compared to said first band and continuously supplying a fast-curing composition along a longitudinal central section of double width compared to said edge section and longitudinally cutting said second band along the middleType: GrantFiled: August 30, 2001Date of Patent: May 11, 2004Assignee: ETG Eclepens S.A.Inventors: Günter Bellmann, Silvano Freti, André Gerber
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Patent number: 6681692Abstract: A self-adjusting blade for engagement with a moving work surface, comprising a steel strip elongated in a first direction between first and second sides, said strip having an edge section along said first side for contact with said work surface, and said edge section being hardened to a hardness exceeding that of the remaining part of said strip. The self-adjusting blade is provided with a coating of a low wear resistance material covering substantially all of said edge section at least on the part thereof contacting the work surface.Type: GrantFiled: February 11, 2002Date of Patent: January 27, 2004Assignee: BTG Eclépens S.A.Inventors: Antoine Beran, Silvano Freti
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Publication number: 20020182437Abstract: A coating blade having a covering comprising a nickel-based matrix and particles of ceramic, diamond or carbide dispersed in said matrix, on the functional part of said blade.Type: ApplicationFiled: April 26, 2002Publication date: December 5, 2002Inventors: Ibrahim Brah Adamou, Silvano Freti
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Publication number: 20020157548Abstract: A self-adjusting blade for engagement with a moving work surface, comprising a steel strip elongated in a first direction between first and second sides, said strip having an edge section along said first side for contact with said work surface, and said edge section being hardened to a hardness exceeding that of the remaining part of said strip.Type: ApplicationFiled: February 11, 2002Publication date: October 31, 2002Inventors: Antoine Beran, Silvano Freti
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Patent number: 6431066Abstract: A doctor blade for direct contact with a ceramic roll surface. The doctor blade includes a strip of metallic carrier material, which, along one edge section is provided with a ceramic coating. The ceramic coating on the blade has a hardness ranging from approximately 850 to 950 microvickers, thereby substantially increasing wear resistance of the blade without substantially increasing wear on the ceramic roll surface for which the blade is adapted for use.Type: GrantFiled: January 27, 2000Date of Patent: August 13, 2002Assignee: BTG Eclepens S.A.Inventors: Jaime Perez, Philippe Crevoisier, Silvano Freti
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Patent number: 6207021Abstract: Creping blade for the detachment of a travelling paper web from a dryer cylinder, said blade having an edge or tip section engaging said cylinder and being constantly hit by the traveling web during its detachment from the cylinder. The invention resides in the improvement of said edge or tip section being provided with a wear-resistant coating on a first part of said edge section hit by the web, the other part of said edge section engaging the cylinder being uncoated or coated with a non-wear-resistant material so that said other part is subjected to sliding wear. A recess is located in the side surface so that the wear land surface that contacts the cylinder remains essentially constant throughout the operative cycle of the blade.Type: GrantFiled: December 2, 1998Date of Patent: March 27, 2001Assignee: BTG Eclepens S.A.Inventors: Tore Eriksson, Silvano Freti
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Patent number: 5824154Abstract: A coating blade (5) for controlled application and smoothing of a coating composition on a travelling paper web (7) supported by a co-rotary roll (9), said blade (5) comprising a steel strip (13) elongated in a first direction between first and second edge sections, said first edge section engaging the paper web (7) and being provided with an abrasive wear resistant deposit (15) to extend the life of the blade, wherein an intermediate layer (17) positioned between said deposit (15) and said steel strip (13), said layer (17) having a higher resistance to abrasive wear than said deposit (15).Type: GrantFiled: March 10, 1997Date of Patent: October 20, 1998Assignee: BTG Eclepens S.A.Inventor: Silvano Freti
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Patent number: 4842674Abstract: A process for measuring the rate of oxidation on the surface of a metal melt wherein the oxide skin on the melt surface is removed at constant temperature and the electromagnetic radiation during the subsequent oxidation is measured with an infra-red radiation pyrometer such that the variation in intensity of the electromagnetic radiation indicates the rate of oxidation. The process can also be employed for measuring the concentration in a metal melt of the elements influencing the rate of oxidation.Type: GrantFiled: April 29, 1983Date of Patent: June 27, 1989Assignee: Swiss Aluminium Ltd.Inventors: Silvano Freti, Kurt Buxmann