Patents by Inventor Probir Kumar Guha

Probir Kumar Guha 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).

  • Patent number: 11135742
    Abstract: A unitary reinforced composite based panel component, and methods of construction thereof is provided. The unitary reinforced panel component eliminates the need for adhesively joining an offset piece to the backside of a panel, to provide additional reinforcing strength thereby improving efficiency and eliminating bond-line read-through (BLRT). A vehicle component is prepared with resort to a preform made of selective comingled fiber bundle positioning (SCFBP) to selectively place co-mingled fibers that are enriched in carbon fiber as a reinforcement relative to other region that rely on a relatively higher percentage of glass fiber reinforcement to create such a preform.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: October 5, 2021
    Assignee: COATS GROUP PLC
    Inventor: Probir Kumar Guha
  • Patent number: 11135816
    Abstract: A process is provided for molding a resin matrix around a distribution of well distributed epoxy coated glass fibers to produce an article. The article is mass produced by the molding process based on a one or more layer structure, with an outer panel having a high degree of surface smoothness common to automotive body panels and a comparatively high tensile strength joinder thereto. The epoxy coated glass fibers are present in a single panel of an article or all such panels of a multiple layer article. The epoxy coated glass fibers can be present in an articles in a form of: chopped glass fibers that are intermixed and vary in orientation, a woven roving containing predominately epoxy glass fibers with carbon fibers dispersed there through, or non-woven fiber mats.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: October 5, 2021
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Philippe Bonte, Marc-Philippe Toitgans, Dominique Boyer, Michael J. Siwajek, Probir Kumar Guha, Michael J. Hiltunen, Shane Skop
  • Publication number: 20210237316
    Abstract: A fiber preform for use in a composite material molding process is provided that includes a fiber bundle containing reinforcing fibers. The fiber bundle arranged in parallel switchbacks forming a first layer of the fiber preform. The parallel switchbacks define a principal orientation. A roving is provided that contains reinforcing fibers in a coating. The roving forms stitches on the fiber bundle in a direction substantially perpendicular to the switchbacks so the stitches join the fiber bundle to itself. A method of forming such a fiber preform includes the fiber bundle in the parallel switchbacks being arranged to form the first layer of the fiber preform. The roving forms stitches on the fiber bundle in a direction perpendicular to the switchbacks to join the fiber bundle to itself.
    Type: Application
    Filed: February 1, 2021
    Publication date: August 5, 2021
    Applicant: COATS & CLARK, INC.
    Inventor: Probir Kumar Guha
  • Patent number: 11072092
    Abstract: A process and system are provided for introducing a blend of chopped and dispersed fibers on an automated production line amenable for inclusion in molding compositions as a blended fiber mat for structural applications. The blend of fibers are simultaneously supplied to an automated cutting machine illustratively including a rotary blade chopper disposed above a vortex supporting chamber. The blend of chopped fibers and binder form a chopped mat. The chopped mat has a veil mat placed on either side, and is consolidated with the veil mat using heated rollers maintained at the softening temperature of thermoplastic binder, with consolidated mats being amenable to being stored in rolls or as flat sheets. A charge pattern is made using the consolidated mat, and the charge pattern can be compression molded in a mold maintained at a temperature lower than the melting point of the thermoplastic fibers.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: July 27, 2021
    Assignee: CONTINENTAL STRUCTURAL PLASTICS
    Inventors: Probir Kumar Guha, Philippe Bonte, Marc-Philippe Toitgans, Dominique Boyer, Gaetan Boivin, Anais Harbonner
  • Patent number: 11066762
    Abstract: A system for debundling fiber tow into chopped fibers is provided that has one or more reels of fiber tow, a cutting element configured to receive the fiber tow to form chopped fiber, and a tube with introduced gas flow configured to receive the chopped fiber. A moving belt is positioned under the tube to collect the chopped fiber. A dispenser is positioned along the moving belt for applying a binder or additive. A treatment chamber receives the treated chopped fiber. A process for debundling fiber tow into chopped fibers is provided that supplies one or more reels of fiber tow to a cutting system, drops the chopped fiber into a tube with introduced gas flow to debundle the chopped fiber with a vortex, collects the chopped fiber exiting the tube onto a moving belt, chemically treats the chopped fiber, and provides the chemically treated chopped to a treatment chamber.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: July 20, 2021
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Philippe Bonte, Marc-Philippe Toitgans, Dominique Boyer, Michael Z. Asuncion, Probir Kumar Guha
  • Publication number: 20210206024
    Abstract: A process and system are provided for introducing a blend of chopped and dispersed fibers on an automated production line amenable for inclusion in molding compositions as a blended fiber mat for structural applications. The blend of fibers are simultaneously supplied to an automated cutting machine illustratively including a rotary blade chopper disposed above a vortex supporting chamber. The blend of chopped fibers and binder form a chopped mat. The chopped mat has a veil mat placed on either side, and is consolidated with the veil mat using heated rollers maintained at the softening temperature of thermoplastic binder, with consolidated mats being amenable to being stored in rolls or as flat sheets. A charge pattern is made using the consolidated mat, and the charge pattern can be compression molded in a mold maintained at a temperature lower than the melting point of the thermoplastic fibers.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Applicant: Continental Structural Plastics, Inc.
    Inventors: Probir Kumar GUHA, Philippe BONTE, Marc-Philippe TOITGANS, Dominique BOYER, Gaetan BOIVIN, Anais HARBONNIER
  • Publication number: 20210107236
    Abstract: A process is provided for thermal molding an article with at least one layer of thermoplastic fibers that are non-woven and uni-directionally oriented in combination with at least one layer of reinforcing fibers. The reinforcing fibers including glass, carbon, nature based, and combinations thereof; alone or mixed with chopped thermoplastic fibers. Upon subjecting the layers to sufficient heat to thermally bond in the presence of non-oriented filler fibers, thermoplastic fiber fusion encapsulates the filler fibers. The filler fibers impart physical properties to the resulting article and the residual unidirectional orientation of the thermoplastic melt imparts physical properties in the fiber direction to the article. By combining layers with varying orientations of uni-directional fibers relative to one another, the physical properties of the resulting article may be controlled and extended relative to conventional thermoplastic moldings.
    Type: Application
    Filed: November 28, 2017
    Publication date: April 15, 2021
    Inventors: Probir Kumar GUHA, Philippe BONTE, Marc-Philippe TOITGANS, Dominique BOYER
  • Publication number: 20210101247
    Abstract: A process for automated sanding of a vehicle component surface is provided and includes providing a sanding mechanism having a sanding head engaged with a housing, a rotary motor contained within the housing, the rotary motor having a drive shaft rotatable about an axis and extending outwardly therefrom, a radial plate attached to a first end of the drive shaft, and a sanding disk having an abrasive surface releasably attached to the radial plate; attaching the sanding head to a gimbal having a pressure sensor; powering the rotary motor driving rotation of the drive shaft, the radial plate and the sanding disk in at least one of a clockwise or counterclockwise direction; movably applying the sanding disk to the surface at a maintained constant pressure; and achieving a desired finish on the surface prepared to be primed and painted to a class A auto high sheen surface finish.
    Type: Application
    Filed: November 29, 2017
    Publication date: April 8, 2021
    Inventors: Probir Kumar GUHA, Philippe BONTE, Marc-Philippe TOITGANS, Dominique BOYER, Mayur S. SHAH, Ohiole AKE
  • Publication number: 20210053304
    Abstract: A form for a vehicle component includes a commingled fiber bundle composed of thermoplastic fibers and a reinforcement fiber. The reinforcement fiber being glass fibers, aramid fibers, carbon fibers, or a combination thereof. The commingled fiber bundle is laid out in a two-dimensional base layer that defines a shape of the form. An optical fiber is stitched to the commingled fiber bundle. A method of forming a unitary reinforced composite component having a sensor system includes the form being placed onto a mold platen. The preform is heated to promote fusion of the thermoplastic fibers therein. The preform is cooled until solidified with contours of the component. The vehicle component is then removed from the mold platen.
    Type: Application
    Filed: August 20, 2020
    Publication date: February 25, 2021
    Applicant: COATS & CLARK, INC.
    Inventor: Probir Kumar Guha
  • Publication number: 20210008816
    Abstract: A form for a thin reinforced composite material includes a plurality of separate linear fiber strips, each having a rectangular cross section composed of reinforcement fibers. The linear fiber strips laid out in a two-dimensional base layer defining a shape of the form. A first successive layer formed with the plurality of separate linear fiber strips contacting the base layer, the linear fiber strips laid out in the first successive layer interspersed from the separate linear fiber strips in the two-dimensional base layer. A method of forming the form includes arranging the plurality of separate linear fiber strips on a substrate and tacking the plurality of separate linear fiber strips to the substrate with a plurality of stitches. A method of forming a unitary reinforced composite component from the form is further provided. The resulting component having high strength and light weight and being efficient to manufacture.
    Type: Application
    Filed: March 19, 2019
    Publication date: January 14, 2021
    Applicant: COATS & CLARK, INC.
    Inventor: Probir Kumar Guha
  • Patent number: 10875213
    Abstract: A process is provided to reclaim carbon fiber from a cured vinyl ester, crosslinked unsaturated polyester, or epoxy thermoset matrix. The composite pieces are added to a polyol solvent composition under to conditions to free more than 95% by weight of the carbon fiber from the composite. The freed carbon fibers are washed and dried to reclaim carbon fiber reusable to reinforce a polymer to form a new FRC article. Solvents are chosen that are low cost and low toxicity. Processing is further facilitated by techniques such as solvent pre-swell of the particles, microwave heating, and sonication to promote thermoset matrix digestion to free reinforcing carbon fibers.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 29, 2020
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael Siwajek, David J. Krug
  • Patent number: 10844204
    Abstract: A molding composition formulation is provided that includes polypropylene, glass fiber, and a cellulosic powder used as a filler. The filler may be at least one of coconut shell powder, walnut shell powder, or rice hull. The molding composition formulation may further include natural cellulosic fiber illustratively including at least one of coconut fibers, bamboo fibers, sugar cane fibers, or banana skin fibers. The molding composition may be compression moldable long fiber thermoplastic (LFTD). The molding composition formulation may be used in thermoforming. In a specific embodiment of the molding composition, the formulation proportion of the polypropylene is 50 to 60 percent of the formulation; and the polypropylene substitute is 5 to 15 percent of the formulation, and in an alternative embodiment, the formulation proportion of the polypropylene is 40 to 80 percent, the cellulosic powder is 1 to 25 percent, and the glass fiber is 1 to 50 percent.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 24, 2020
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Probir Kumar Guha, Michael J. Siwajek, Michael J. Hiltunen, Shane Skop
  • Publication number: 20200262107
    Abstract: A process is provided for forming a pre-consolidated fiber preform for use in a molding process. The process includes layering a plurality of preform sheets on a pre-consolidation mold. Heating the plurality of preform sheets to a first temperature. Applying a first pressure to the plurality of preform sheets using the pre-consolidated mold. Maintaining the first temperature and the first pressure and heating for a first duration of time. A second pressure and a second temperature are then applied to the plurality of preform sheets for a second duration of time.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 20, 2020
    Applicant: COATS & CLARK, INC.
    Inventors: Probir Kumar Guha, Gokhan K. Coban
  • Patent number: 10730990
    Abstract: A monomer is provided for a thermoset molding compound. The monomer is also polymerized with conventional monomers to form thermoplastic polymers. Graphene oxide is used to chelate metal ions to form a graphene oxide chelate that is coupled to a monomer retaining an aliphatic unsaturation capable of free radical polymerization reaction. Inclusion of a metal ion chelated to the graphene oxide affords control over the conductivity of the resultant article. In some embodiments, the monomer is found polymerized into a resulting article proximal to the article surface.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: August 4, 2020
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Michael Z. Asuncion, Probir Kumar Guha, David J. Krug, Michael J. Siwajek
  • Publication number: 20200224340
    Abstract: A system for debundling fiber tow into chopped fibers is provided that has one or more reels of fiber tow, a cutting element configured to receive the fiber tow to form chopped fiber, and a tube with introduced gas flow configured to receive the chopped fiber. A moving belt is positioned under the tube to collect the chopped fiber. A dispenser is positioned along the moving belt for applying a binder or additive. A treatment chamber receives the treated chopped fiber. A process for debundling fiber tow into chopped fibers is provided that supplies one or more reels of fiber tow to a cutting system, drops the chopped fiber into a tube with introduced gas flow to debundle the chopped fiber with a vortex, collects the chopped fiber exiting the tube onto a moving belt, chemically treats the chopped fiber, and provides the chemically treated chopped to a treatment chamber.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 16, 2020
    Applicant: Continental Structural Plastics, Inc.
    Inventors: Philippe Bonte, Marc-Philippe Toitgans, Dominique Boyer, Michael Z. Asuncion, Probir Kumar Guha
  • Patent number: 10689781
    Abstract: A system for debundling fiber tow into chopped fibers is provided that has one or more reels of fiber tow, a cutting element configured to receive the fiber tow to form chopped fiber, and a tube with introduced gas flow configured to receive the chopped fiber. A moving belt is positioned under the tube to collect the chopped fiber. A dispenser is positioned along the moving belt for applying a binder or additive. A treatment chamber receives the treated chopped fiber. A process for debundling fiber tow into chopped fibers is provided that supplies one or more reels of fiber tow to a cutting system, drops the chopped fiber into a tube with introduced gas flow to debundle the chopped fiber with a vortex, collects the chopped fiber exiting the tube onto a moving belt, chemically treats the chopped fiber, and provides the chemically treated chopped to a treatment chamber.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 23, 2020
    Assignee: CONTINENTAL STRUCTURAL PLASTICS, INC.
    Inventors: Philippe Bonte, Marc-Philippe Toitgans, Dominique Boyer, Michael Z. Asuncion, Probir Kumar Guha
  • Publication number: 20200148279
    Abstract: A vehicle component is provided that includes a first cured layer of a molding composition having a predominant fiber filler chopped glass fibers, a second cured layer of molding composition having a predominant fiber filler chopped carbon fibers, and an elastomeric bonding agent with elongation properties configured to accommodate the differential coefficients of linear thermal expansion between the first cured layer and the second cured layer. The second cured layer is substantially devoid of glass fiber. The bonding agent is an elastomeric adhesive, which is operative from ?40 to 205° C. The first cured layer forms an outer skin layer surface of a vehicle and the second cured layer forms an interior layer, where the outer skin layer surface has a class-A finish.
    Type: Application
    Filed: January 17, 2020
    Publication date: May 14, 2020
    Applicant: Continental Structural Plastics, Inc.
    Inventors: Probir Kumar Guha, Michael Siwajek, Michael J. Hiltunen, Shane Skop, Satish Haryadi
  • Publication number: 20200139583
    Abstract: A fiber preform for use in a resin transfer molding or liquid composite molding process and process of making the same are provided. The preform includes a substrate, a fiber bundle arranged on the substrate in a predetermined pattern and attached to the substrate by a plurality of stitches of a thread. The fiber preform is capable of being pre-formed into a three-dimensional shape. The fiber preform along with a sheet of preformed thermoset resin that impregnates at least a portion of the fiber preform forms a composite material. The fiber preform reinforces areas of stress concentration of a core to form a vehicle component.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Inventor: Probir Kumar Guha
  • Publication number: 20200139584
    Abstract: A process of forming the fiber preform includes providing a substrate, applying a first layer of a fiber bundle to the substrate in a predetermined pattern having a principal orientation, stitching the first layer of the fiber bundle to the substrate using a thread, building up subsequent layers of the fiber bundle from the first layer, and stitching each of the subsequent layers to a preceding layer using the thread. A process of forming a unitary reinforced composite material includes the fiber preform. The process of forming a unitary reinforced composite component includes placing the fiber preform a mold platen, heating the perform to promote fusion of the thermoplastic fibers therein, cooling the perform until solidified with contours of the component, and removing the vehicle component from the mold platen.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Applicant: Coats Group PLC
    Inventor: Probir Kumar Guha
  • Publication number: 20200139651
    Abstract: A vehicle component that includes at least one fiber preform. The fiber preform includes a substrate, a fiber bundle having one or more types of reinforcing fibers, and a thread. The fiber bundle is arranged on the substrate and attached to the substrate by a plurality of stitches of the thread to form a first preform layer having a principal orientation. The vehicle component includes a core having a geometry with at least one edge and at least one the fiber preforms positioned along the at least one edge, the core and the fiber preform being overmolded in a resin. A process of making the vehicle component includes providing the core having the at least one edge, positioning the at least one fiber preform along the at least one edge, and overmolding the core and the at least one fiber preform in the resin.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Inventor: Probir Kumar Guha