Patents Assigned to Fits Holding B.V.
  • Patent number: 10369726
    Abstract: A method and device for manufacturing a sandwich structure comprising at least one foam layer of a first thermoplastic comprising a chemical blowing agent and two fibre-reinforced cover layers of a second thermoplastic. The decomposition temperature of the chemical blowing agent is higher than the melting point or range of the first thermoplastic. The method comprises a series of steps performed on a starting structure including heating under pressure in order to cause decomposition of the blowing agent, cooling, foaming and further cooling in contact with the press tools.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: August 6, 2019
    Assignee: FITS HOLDING B.V.
    Inventor: Martin Theodoor De Groot
  • Patent number: 9242425
    Abstract: A sandwich structure based on a composite panel made of a thermoplastic core layer connected to at least one fiber-reinforced thermoplastic layer, in particular in-situ manufactured sandwich panels, comprises a thermoplastic core, which is arranged between two cover layers, in which the core is reinforced with fiber-reinforced thermoplastic reinforcing ribs which extend between the cover layers. Preferred methods for the manufacture are also described.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: January 26, 2016
    Assignee: FITS Holding B.V.
    Inventor: Martin Theodoor de Groot
  • Patent number: 8932422
    Abstract: A sandwich structure based on a composite panel made of a thermoplastic core layer connected to at least one fiber-reinforced thermoplastic layer, in particular in-situ manufactured sandwich panels, comprises a thermoplastic core, which is arranged between two cover layers, in which the core is reinforced with fiber-reinforced thermoplastic reinforcing ribs which extend between the cover layers. Preferred methods for the manufacture are also described.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: January 13, 2015
    Assignee: FITS Holding B.V.
    Inventor: Martin Theodoor de Groot
  • Patent number: 8426006
    Abstract: An exemplary method for manufacturing and reinforcing a corner in an object made from a sandwich structure, having a thermoplastic core layer (18), which is arranged between two cover layers (16), at least one of which is a plastic cover layer, which method includes the steps of: producing an object including a corner between two object parts; positioning a thermoplastic core part (24) and an additional fiber-reinforced thermoplastic layer (26) in the corner, which thermoplastic core part has a shape adapted to the corner, in such a manner that the additional fiber-reinforced thermoplastic layer (26) substantially covers the exposed surface of the core part (24); and connecting a cover layer (16) of the sandwich structure to the additional fiber-reinforced thermoplastic layer (26).
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: April 23, 2013
    Assignee: FITS Holding B.V.
    Inventor: Martin Th. de Groot
  • Patent number: 8110133
    Abstract: A method for producing a composite construction element is disclosed. In one embodiment, the method includes the steps of: a) providing a composite construction element, which comprises a thermoplastic core layer between two fiber-reinforced thermoplastic cover layers; b) providing one or more interruptions in a fiber-reinforced thermoplastic cover layer of the panel; c) positioning a fiber-reinforced thermoplastic reinforcing layer over and/or near the interruption; d) deforming at least the edges situated along the interruption and, if desired, the thermoplastic reinforcing layer, preferably while simultaneously locally compacting the core layer, so that a thermoplastic construction element having a recess which is delimited by fiber-reinforced thermoplastic walls is obtained.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: February 7, 2012
    Assignee: FITS Holding B.V.
    Inventor: Martin Theodoor de Groot
  • Patent number: 7807093
    Abstract: A method for arranging a thermoplastic insert unit (2) in a thermoplastic sandwich product (1) having at least one planar or virtually planar section by the application of ultrasonic energy (6, 8). A thermoplastic sandwich product (1) comprises at least one fiber-reinforced thermoplastic covering layer (7) and a thermoplastic core which is not completely solid (8). Examples of thermoplastic sandwich products include: a flat plate, a slightly curved product, a folded product, etc. The production of a recess in the surface of the thermoplastic sandwich product, with the plastic insert unit being welded into the recess.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: October 5, 2010
    Assignee: Fits Holding B.V.
    Inventor: Martin Theodoor de Groot
  • Publication number: 20090297758
    Abstract: A sandwich structure based on a composite panel made of a thermoplastic core layer connected to at least one fiber-reinforced thermoplastic layer, in particular in-situ manufactured sandwich panels, comprises a thermoplastic core, which is arranged between two cover layers, in which the core is reinforced with fiber-reinforced thermoplastic reinforcing ribs which extend between the cover layers. Preferred methods for the manufacture are also described.
    Type: Application
    Filed: May 7, 2007
    Publication date: December 3, 2009
    Applicant: FITS HOLDING B.V.
    Inventor: Martin Theodoor de Groot
  • Publication number: 20090115097
    Abstract: A method for producing a composite construction element comprises the steps of: a) providing a composite construction element, which comprises a thermoplastic core layer between two fiber-reinforced thermoplastic cover layers; b) providing one or more interruptions in a fiber-reinforced thermoplastic cover layer of the panel; c) positioning a fiber-reinforced thermoplastic reinforcing layer over and/or near the interruption; d) deforming situated along the interruption and, if desired, the thermoplastic reinforcing layer, preferably while simultaneously locally compacting the core layer, so that a thermoplastic construction element having a recess which is delimited by fiber-reinforced thermoplastic walls is obtained.
    Type: Application
    Filed: May 7, 2007
    Publication date: May 7, 2009
    Applicant: FITS HOLDING B.V.
    Inventor: Martin Theodoor de Groot
  • Publication number: 20090047463
    Abstract: The invention relates to a method of manufacturing a sandwich panel (10). Such a sandwich panel consists of a foamed core layer (12) and at least one thermoplastic cover layer (14). The sandwich panel is made by in situ foaming. In a first assembling step a core web, comprising at least one sheet of a thermoplastic material (12) containing an amount of a suitable physical blowing agent is positioned between two cover layers (14). The assembly of core web and cover layers is arranged between two press plates. Due to heat and pressure applied in a subsequent foaming step, foaming of the core web and effective bonding thereof to the cover layers is achieved. Subsequently the foamed assembly is allowed to cool down. Remaining physical blowing agent is removed during a subsequent drying step at elevated temperature while the outflow of physical blowing agent via the peripheral edges of the panel (10) is restricted, e.g. by taping (24) or clamping by clamps (16, 20).
    Type: Application
    Filed: January 24, 2006
    Publication date: February 19, 2009
    Applicant: FITS HOLDING B.V.
    Inventor: Martin Theodoor de Grooi