Schlegel Corporation

Schlegel Systems Inc.

Stanley R Miska

Kenneth W Hermann

Daniel T Courtney

Jay E Boyce

Disclosed is a conductive, flame-retardant polymeric fabric composed of a woven or non-woven nylon, polyester or acrylic fabric. A surface of the fabric is provided with a flame-retardant layer applied by coating the flame-retardant directly onto the fabric surface. Disposed on the flame-retardant layer is a conductive metal applied preferably by vapor deposition. The resulting article not only has a surface resistance of less than one ohm/sq, but also the article has an Underwriter Laboratories very thin material (VTM) vertical bum test rating of zero rendering the article suitable for use as an electromagnetic interference shielding fabric.

Flame retardant corrosive resistant conductive fabric article and method

A conductive electromagnetic interference (EMI) shielding gasket having a compressible non-conductive core enwrapped with a conductive sheath. The sheath is a laminate formed by laminating a conductive metal foil at least 0.2 mils thick to a flexible non-conductive substrate, preferably a non porous polyester film.

EMI foil laminate gasket

A method for making a conductive gasket for use in apparatus to block the exit or entry of electromagnetic interference (EMI) between adjacent metal surfaces of the apparatus. The gasket is formed at least in part by a polymeric film having an outward facing surface embossed so as to provide a plurality of peaks distributed over the surface. A metal is coated, by vapor deposition, onto the surface so as to over lie the peaks.

Method for making an abrasion resistant conductive film and gasket

A conductive gasket for use in apparatus to block the exit or entry of electromagnetic interference (EMI) between adjacent metal surfaces of the apparatus. The gasket is formed at least in part by a polymeric film having an outward facing surface embossed so as to provide a plurality of peaks distributed over the surface. A metal is coated, by vapor deposition, onto the surface so as to over lie the peaks. This provides the film with a conductive surface. When located between adjacent metal surfaces, abrasion of the metal coating from the peaks over time does not adversely affect the conductive properties of the film surface. This is because the wearing away of the metal from the tops of the peaks exposes a cross section of the metal at the sides of the peaks, which remain in contact with the adjacent metal surfaces of the apparatus.

Abrasion resistant conductive film and gasket

A gasket for electrical apparatus and the like, operation of which tends to generate or be adversely affected by electromagnetic and radio frequency interference (EMI/RFI), comprising a compressible, electrically conductive core. It may also comprise a flexible, electrically conductive, and substantially abrasion resistant sheath surrounding the compressible core. The apparatus may be sealed against EMI/RFI leakage, noise emission and environmental infiltration and the like.

Through conductive EMI shielding gasket

A molded rubber hanger with a reinforcing belt made from a woven fabric or a continuous yarn. The belt has perforations through which the rubber passes to form a mechanical bond. The perforations may be woven directly into a fabric, or they may be provided after fabrication of the belt.

Textile-reinforced rubber exhaust system hanger

An EMI gasket blocks electromagnetic radiation between electrically conductive bodies, is disposed to occupy an area, and can have openings for conductors or connectors. A resilient core is covered on opposite surfaces with a conductive sheet material such as a metalized polymer fabric that can be woven, nonwoven, knitted, braided, etc., for providing electromagnetic sealing when the gasket is compressed between the bodies. The polymer sheet is coupled through between the opposite faces of the gasket along lengthwise seams that are heat sealed through the core or have conductive thread, yarn, wire or fasteners that extend through the core. Preferably, the gasket is quilted using conductive thread or yarn. The conductive material extending through the core to couple the opposite faces of the gasket provides conducting paths that improve shielding efficiency as compared to a comparable structure wherein electrical conduction between the opposite faces (and the sealed bodies) is limited to the conductive surface material. The seal can be die cut to form openings for connectors or conductors, avoiding the need for perimeter seals around the openings.

Wide area emi gasket with conductors traversing core

An EMI seal or gasket blocks electromagnetic radiation between electrically conductive bodies and encompasses an area using a number of adjacent segments, each generally formed as an elongated seal with a resilient core. An electrically conductive surface bears against the conductive bodies and extends at least partway around the respective segment. The segments are attached to one another along lengthwise seams, preferably using conductive tape on one of the opposite sides of the seal. The conductive surface is preferably provided by a metallized fabric affixed to a resilient foamed polymer core, which can be molded in the fabric or otherwise formed or cut and attached, e.g., adhesively. The conductive fabric or other surface material extending substantially around the segments provides more conducting paths across the gap between the conductive bodies than a non-segmented seal of comparable size, thereby improving shielding efficiency. The seal can be die cut, including cutting through the width of one or more segments, and remains intact, providing many of the benefits of both wide seals or gaskets and elongated narrow seals.

Segmented shielding structure for connector panels

An EMI gasket blocks electromagnetic radiation between electrically conductive bodies and encompasses an area using a number of adjacent segments, each generally formed as a resilient core section. An electrically conductive surface material bears against the conductive bodies and extends over the segments, the surface material preferably being formed of a metallized polymer sheet. The polymer sheet is coupled through between the opposite faces of the gasket along lengthwise seams where either the sheet is depressed into the seam or coupled by a conductive adhesive, such that the opposite faces of the gasket are electrically coupled between the segments. The conductive material extending through the gasket to couple the opposite faces provides conducting paths that improve shielding efficiency. The seal can be die cut, including cutting through the width of one or more segments, and remains intact, providing many of the benefits of both wide seals or gaskets and elongated narrow seals.

An electronic device is shielded against electromagnetic interference using a flexible conductive sheet forming a shield barrier or enclosure. The sheet has electrically insulating polymer material exposed on the surface of at least one face. Conductive material is embedded in or laminated on the sheet so as to be exposed selectively. More particularly, a nonconductive surface area is formed, especially oriented inwardly to avoid electrical shorts, but also exposed inwardly or outwardly where necessary to ground the shield barrier or to engage with another conductive body. The flexible sheet can form a loose envelope with a flange-like gasket at an open end. The gasket can be used to improve physical contact with a conductive body, and preferably also admits I/O connectors that need to traverse the shield barrier, and advantageously have external shielding that is grounded to the shielding barrier for continuing the shielding enclosure. Alternatively or additionally, openings are provided in the sheet for access, the conductive material being insulated around a perimeter or the openings by insulating lips which prevent unwanted shorting. This permits changing or adding circuit chips without removing the shield, and can be provided with a flap closure for minimizing the gap in the shield. The flexible envelope can be joined to a circuit ground by clamping the gasket or the conductive fibers on an exposed face to a the I/O connector, to a common ground, or to an external grounded panel.

EMI shielding having flexible condustive sheet and I/O Gasket

A weatherstrip and method for making the weatherstrip for use in sealing the space between fixed and movable members. The weatherstrip comprises a backing strip having a sealing body affixed thereto to form a sealing assembly, and a barrier fin secured at one edge to the sealing assembly. The barrier fin comprises a pair of leafs transverse to the backing strip. A longitudinal fold line in each leaf defines a leaf portion extending outwardly from the backing strip and toward the other leaf portion. The leaf portions are sealed together to form a hollow fin of substantially diamond-shaped cross section.

Pile weatherstrip having a diamond-shaped barrier fin and method of

An improved pile weather strip having one or more rows of pile formed from substantially identical, closely packed monofilament yarns of non-circular cross-section whereby improved resistance to infiltration of foreign material such as air and moisture is achieved. Each monofilament yarn fiber is preferably of an enlarged X-shaped cross-section.

Pile weather strip with barrier fibers and body fibers

Weatherstrip is composed of a substrate having a pile strip upstanding from one surface thereof. In one embodiment the substrate is made of two different materials, one of which is a thermoplastic material that is heat sealed by being passed over a heated bar to prevent the edges of the weatherstrip from fraying. The other material maintains the structural integrity of the substrate during heat-sealing. Essentially the whole of the undersurface of the substrate including the portion immediately beneath the pile strip contains the aforementioned thermoplastic material, making it possible for the substrate to be surface mounted on a component such as a door or window fabricated of a material compatible to the thermoplastic material. In another embodiment the substrate may be composed entirely or partly of the thermoplastic material, and the same thermoplastic material is extruded onto the back of the substrate.

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Pittsford, NY, United States of America

Stanley R Miska