# US 11,027,889 B1 · Flexible magnetic and interlocking sealing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,889 B1 - Document ID: US11027889B1 - Status: Granted - Kind: B1 - Application number: 16/407,172 - Filed: 2019-05-08 - Granted: 2021-06-08 - Earliest claimed: 2018-05-08 - Assignees: Fidlock GmbH - Applicants: Fidlock GmbH - Inventors: Donald Western; William Lee - Web page: https://patentgrep.com/patent/US11027889B1 ## CPC - B65D 33/1658: {Elements for flattening or folding the mouth portion (B65D33/30 takes precedence)} - B65D 33/1675: {Hinged clips} - E06B 7/16: Sealing arrangements on wings or parts co-operating with the wings ({specially adapted for fireproof or similar closures E06B5/164; } E06B7/098 takes precedence {; fixed sealing joints E04B1/68; devices for fitting sealing strips E04F21/00}) - H01F 7/0263: {Closures, bags, bands, engagement devices with male and female parts} - B65D 2313/04: of magnetic type - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract The present invention provides a sealing closure made of flexible magnetic strips with a non-uniform thickness, which provide an improved interlocked seal in addition to a magnetic seal. The sealing closure has strips with at least one guide that aligns automatically with another strip when the two strips are brought together to create a more secure sealing closure. ## Claims ### Claim 1 A magnetic sealing closure, comprising: a first flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein, the second side of the first flexible strip having a raised portion; a second flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein; a third flexible strip, having first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein, the second side of the third flexible strip having a recessed portion corresponding to the raised portion of the second side of the first flexible strip; a first membrane coupled to said first side of said first strip, such that said plurality of magnetic elements of said first strip are flush mounted and embedded within said plurality of cavities between said first strip and said first membrane, said first membrane further coupled to said first side of said third strip, such that said plurality of magnetic elements of said third strip are flush mounted and embedded within said plurality of cavities between said third strip and said first membrane; and a second membrane coupled to said first side of said second strip, such that said plurality of magnetic elements of said second strip are flush mounted and embedded within said plurality of cavities between said second strip and said second membrane; wherein said first and said second strips provide a first seal when said first and said second strips are brought together from said first sides of said first and said second strips and magnetic elements of said first and said second strips magnetically attract each other, wherein said first and said third strips provide a second seal when said first, said second, and said third strips are subsequently brought together from said second sides of said first and said third strips and magnetic elements of said first and said third strips magnetically attract each other. ### Claim 2 (depends on 1) The magnetic sealing closure of claim 1, wherein each of said membranes have a predetermined static friction coefficient which substantially prevents movement of said membranes with respect to each other. ### Claim 3 (depends on 1) The magnetic sealing closure of claim 1, wherein said membranes are walls of a sealable device. ### Claim 4 (depends on 1) The magnetic sealing closure of claim 1, wherein said magnetic elements of said strips comprise a material selected from the group consisting of: Neodymium, Neodymium Iron Boron (NdFeB), Samarium-Cobalt, or Electromagnet. ### Claim 5 (depends on 1) The magnetic sealing closure of claim 1, wherein said first seal is stable to mechanical deformations selected from the group consisting of: bending, rotation, twisting, and/or tilting. ### Claim 6 (depends on 1) The magnetic sealing closure of claim 1, wherein said first seal is flexible and water impermeable. ### Claim 7 (depends on 1) The magnetic sealing closure of claim 1, wherein said strips and said membranes are sealingly connected via mechanical connection means, and wherein said mechanical connection means are selected from the group consisting of: RF welding, ultrasonic welding, heat welding, sewing, via a seal tape, or gluing. ### Claim 8 (depends on 1) The magnetic sealing closure of claim 1, wherein said sealing closure is incorporated in a sealable device which is selected from the group consisting of: a pouch, a bag, a sack, a pocket, a device useful for sterile purposes, a door with a frame, a tent, a greenhouse, or a waterproof pocket. ### Claim 9 (depends on 1) The magnetic sealing closure of claim 1, wherein the second flexible strip has a non-uniform thickness. ### Claim 10 (depends on 1) The magnetic sealing closure of claim 1, wherein said plurality of cavities of said first strip, said second strip, and said third strip are selected from the group consisting of: niches, recesses, pits, openings, holes, full openings, or apertures. ### Claim 11 (depends on 1) The magnetic sealing closure of claim 1, wherein said sealing closure is manufactured according to a method selected from the group consisting of: extrusion, coextrusion, or molding. ### Claim 12 (depends on 1) The magnetic sealing closure of claim 1, wherein said membranes each have a predetermined thickness of between 0.05 mm and 0.6 mm. ### Claim 13 (depends on 1) The magnetic sealing closure of claim 1, wherein said membranes each have a predetermined thickness of between 0.2 mm and 0.4 mm. ### Claim 14 (depends on 1) The magnetic sealing closure of claim 1, wherein said plurality of cavities of said strips are equally spaced between each other at a distance of between 2 mm and 8 mm, such that each magnetic element within each cavity of said plurality of cavities has a diameter of between 4 mm and 10 mm, and a thickness of between 1 mm and 3 mm. ### Claim 15 (depends on 1) The magnetic sealing closure of claim 1, wherein said first strip and said second strip have a width of between 10 mm and 20 mm, and wherein said uniform predetermined thickness of said first strip and said second strip is between 1 mm and 3 mm. ### Claim 16 (depends on 1) The magnetic sealing closure of claim 1, wherein said membranes and said strips comprise polymeric materials selected from the group consisting of: elastomer, rubber, TPR, TPE, TPU, HPU, Neoprane, Polyacrylates, Polyamides, Polyesters, Polycarbonates, Polyimides, Polystyrenes, acrylonitrile butadiene styrene (ABS), polyacrylonitrile (PAN) or Acrylic, polybutadiene, poly (butylene terephthalate) (PBT), poly (ether sulfone) (PES, PES/PEES), poly(ether ketone)s (PEEK, PES/PEEK), polyethylene (PE), polyethylene glycol) (PEG), poly (ethylene terephthalate) (PET), polypropylene (PP), polytetrafluoroethylene (PTFE), styrene-acrylonitrile resin (SAN), poly(trimethylene terephthalate) (PTT), polyurethane (PU), polyvinyl butyral (PVB), polyvinylchloride (PVC), polyvinylidenedifluoride (PVDF), or polyvinyl pyrrolidone (PVP). ### Claim 17 (depends on 2) The magnetic sealing closure of claim 2, wherein said predetermined static friction coefficient of said membranes is between 0.01 and 0.99. ### Claim 18 (depends on 2) The magnetic sealing closure of claim 2, wherein said predetermined static friction coefficient of said membranes is between 0.1 and 0.6. ### Claim 19 A magnetic sealing closure, comprising: a first flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein, the second side of the first flexible strip having a recessed portion; a second flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein; a third flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein, the second side of the third flexible strip having a raised portion corresponding to the recessed portion of the second side of the first flexible strip; a first membrane coupled to said first side of said first strip, such that said plurality of magnetic elements of said first strip are flush mounted and embedded within said plurality of cavities between said first strip and said first membrane, said first membrane further coupled to said first side of said third strip, such that said plurality of magnetic elements of said third strip are flush mounted and embedded within said plurality of cavities between said third strip and said first membrane; and a second membrane coupled to said first side of said second strip, such that said plurality of magnetic elements of said second strip are flush mounted and embedded within said plurality of cavities between said second strip and said second membrane; wherein said first and said second strips provide a first seal when said first and said second strips are brought together from said first sides of said first and said second strips and magnetic elements of said first and said second strips magnetically attract each other, wherein said first and said third strips provide a second seal when said first, said second, and said third strips are subsequently brought together from said second sides of said first and said third strips and magnetic elements of said first and said third strips magnetically attract each other. ### Claim 20 A magnetic sealing closure, comprising: a first flexible strip, having a non-uniform thickness with one or more recesses or protrusions, a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein; a second flexible strip, having a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein; a third flexible strip, having a non-uniform thickness with one or more recesses or protrusions, a first side and a second side, with a plurality of cavities having a plurality of magnetic elements therein, the one or more recesses or protrusions of the third flexible strip mating to the one or more recesses or protrusions of the first flexible strip; a first membrane coupled to said first side of said first strip, such that said plurality of magnetic elements of said first strip are flush mounted and embedded within said plurality of cavities between said first strip and said first membrane, said first membrane further coupled to said first side of said third strip, such that said plurality of magnetic elements of said third strip are flush mounted and embedded within said plurality of cavities between said third strip and said first membrane; and a second membrane coupled to said first side of said second strip, such that said plurality of magnetic elements of said second strip are flush mounted and embedded within said plurality of cavities between said second strip and said second membrane; wherein said first and said second strips provide a first seal when said first and said second strips are brought together from said first sides of said first and said second strips and magnetic elements of said first and said second strips magnetically attract each other, wherein said first and said third strips provide a second seal when said first, said second, and said third strips are subsequently brought together from said second sides of said first and said third strips and magnetic elements of said first and said third strips magnetically attract each other.