# US 5,705,006 A · Fire resistant repair patch and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,006 A - Document ID: US5705006A - Status: Granted - Kind: A - Application number: 08/306,674 - Filed: 1994-09-15 - Granted: 1998-01-06 - Earliest claimed: 1990-11-23 - Assignees: Akro Fireguard Products, Inc. - Inventors: Thomas Roudebush; Thomas Haxton; Robert L. McGeary; Bill Clarke - Web page: https://patentgrep.com/patent/US5705006A ## CPC - B64F 5/40: Maintaining or repairing aircraft - A62C 2/065: {having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent} - B29C 73/10: using patches sealing on the surface of the article (B29C73/14 takes precedence) - B29K 2063/00: Use of {EP, i.e.} epoxy resins {or derivatives thereof}, as moulding material - B29K 2105/06: containing reinforcements, fillers or inserts - Y10S 428/92: Fire or heat protection feature - Y10S 428/921: Fire or flameproofing - Y10T 428/197: with noncoplanar reinforcement - Y10T 428/24999: Inorganic - Y10T 428/28: Web or sheet containing structurally defined element or component and having an adhesive outermost layer - Y10T 442/133: Inorganic fiber-containing scrim - Y10T 442/198: Coated or impregnated - B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A fire resistant patch for aircraft composite cargo bay liners. The patch includes a base member consisting of at least one inner sheet of woven fiberglass with outer layers of flame resistant plastic. A scrim consisting of a fiberglass lattice netting having a periphery larger than that of the base member includes a pressure sensitive adhesive on a bottom side thereof is also provided. A layer of resin containing a flame retardant additive is applied to the bottom side of the base member, and the base member is applied to the liner to cover the damaged area thereof. The resin layer is allowed to partially cure to retard movement of the base member. Strips of flame resistant tape may be affixed over the base member to hold it in place instead of the partial curing. The scrim is then placed over the base member and tape on the liner using the pressure sensitive adhesive. The scrim is placed such that the periphery thereof extends beyond the entire periphery of the base member. The peripheral area of the scrim extending beyond the base member is fixed to the liner using the adhesive on the scrim. The epoxy resin containing the flame resistant additive is then applied over the scrim, tape and base member. The resin coating is continuous and extends beyond the periphery of the scrim. Upon curing the resin provides structural strength and protects the base member from impinging flame. ## Claims ### Claim 1 A method of repairing a damaged area of a fire resistant container comprising the steps of: providing: a fire resistant base member having a top side, a bottom side and a periphery a scrim defining an open mesh lattice; and at least one quantity of fire resistant resin which swells the temperature of impinging flames; applying a layer of said resin to said bottom side of said base member or the fire resistant container surrounding the damaged area, and thereafter securing said base member to the fire resistant container with said layer completely surrounding the damaged area and said periphery of said base member surrounding the damage area such that said base member completely covers the damaged area; placing said scrim in a position overlying said top side of said base member; applying a coating of said resin to said top side of said base member and said scrim to thereby embed said scrim within said resin; and allowing said resin to cure. ### Claim 2 (depends on 1) A method as in claim 1, wherein said step of providing a scrim comprises said scrim including a pressure sensitive adhesive on at least said portions of said bottom surface of said scrim. ### Claim 3 (depends on 1) A method as in claim 1, wherein said step of providing a scrim comprises said scrim comprising fiberglass elements. ### Claim 4 (depends on 3) A method as in claim 3, wherein said step of providing fiberglass elements comprises providing a first plurality of elements arranged substantially parallel to each other and a second plurality of elements arranged substantially parallel to each other and substantially perpendicular to, and within the plane of, said first plurality of elements, each plurality of elements having a spacing of 9 to 11 elements per inch. ### Claim 5 (depends on 4) A method as in claim 4, wherein said step of providing a scrim comprises said scrim including a pressure sensitive adhesive on at least said portions of said bottom surface of said scrim. ### Claim 6 (depends on 1) A method as in claim 1, wherein said providing step further comprises providing at least one strip of adhesive tape, and said method further comprising, subsequent to said step of securing said base member, and prior to said step of placing said scrim, the step of: placing said adhesive tape at a position crossing said periphery of said base member and adhesively securing said adhesive tape to said base member and the fire resistant container, whereby said adhesive tape resists movement of said base member with respect to the fire resistant container container. ### Claim 7 (depends on 6) A method as in claim 6, wherein said step of providing at least one strip of adhesive tape comprises providing at least one strip of glass cloth, each said strip having pressure sensitive adhesive on one side thereof. ### Claim 8 (depends on 1) The method of claim 1, wherein said step of providing said scrim further comprises said scrim including a periphery, said scrim periphery being larger than said base member periphery, and wherein said step of placing said scrim further comprises completely surrounding said base member periphery with said scrim such that a peripheral portion of said scrim extends beyond said base member periphery. ### Claim 9 (depends on 8) The method of claim 8, wherein said step of providing said scrim further comprises said scrim including an adhesive on a bottom side of said scrim, and wherein said step of placing said scrim further comprises at least adhesively securing said peripheral portion of said scrim to the fire resistant container. ### Claim 10 A method of repairing a damaged area of a fire resistant container comprising the steps of: applying a layer of fire resistant resin which swells under the temperature of impinging flames around the damaged area of the container or to a bottom side of a fire resistant patch member; securing the patch member to the container with the patch member extending over the damaged area and the layer of intumescent material; applying a second layer of the fire resistant resin over a top side of the patch member; and allowing the layers of resin to cure. ### Claim 11 (depends on 10) The method as claimed in claim 10, further comprising the step of: placing a scrim over the top side of the patch member before said step of applying a second layer.