Abstract: A method of manufacturing a resonant tag on which at least two resonant circuits having different resonant frequencies are formed so as to enable the tag to be identified, the method including coating a conductive thin film on two surfaces of an insulating thin film, printing a plurality of first conductive patterns on a surface of one of the conductive thin films and a corresponding plurality of second conductive patterns on a surface of the other conductive thin film using an anti-etching ink, each of the first conductive patterns and an opposite one of the second conductive patterns defining a separate and distinct resonant circuit, each of the first and second conductive patterns respectively containing one element of a capacitor which corresponds to a distinct resonant frequency of a separate resonant circuit and another element of the capacitor which corresponds to the distinct resonant frequency of the separate resonant circuit, etching the conductive thin films to remove non-printed portion of the con

Abstract: A resonant tag carries a plurality of resonant circuits having different resonant frequencies. The resonant circuit is composed of a first conductive pattern formed by a conductive metal foil on one surface of an insulating thin film and a second conductive pattern formed by a conductive metal foil on the other surface of the insulating thin film. The first conductive pattern contains an inductor element and an element of the capacitor, which correspond to a resonant frequency of the resonant circuit. The second conductive pattern contains the other element of the capacitor element. The capacitor element of the second conductive pattern, which corresponds to the resonant frequency, is disposed at a position where it faces the capacitor element of the first conductive pattern formed on one surface of the insulating thin film.

Abstract: A resonant frequency characteristic tag has a thin dielectric film made of a polymer such as polyethylene, and a pair of resonant frequency characteristic circuits each formed on each side of the thin dielectric film, made of a metal foil and having a particular resonant frequency, the two resonant frequency characteristic circuits have terminal sections short-circuited to one another. A release paper is applied by a pressure sensitive adhesive to the surface of one of the two resonant frequency characteristic circuits, and a through hole or opening(s) with a diameter in a range between 0.5 and 3 mm is formed at an electrode plate in a capacitor section of the circuit. The distance between the two electrode plates is adjusted to a predetermined dimension by heating and pressing a portion at the periphery of the through hole or opening(s) with a suitable tool.

Abstract: A resonant frequency characteristic tag is disclosed, which comprises an electrically insulating thin film having an electric characteristic, an electric circuit consisting of a metal foil formed on one side surface of the thin film and having a predetermined length and having opposite end portions respectively formed with a capacitor section and a terminal section, the capacitor section having a piercedly formed hole extending from the side of the metal foil to the other side surface of the thin film, the metal foil being deformed in the formation of the hole into a burr-like portion extending toward the other side surface of the thin film, and an electrode metal foil formed on the other side surface of the thin film and having a size capable of containing the hole, the electrode metal foil being laminated to the other side surface of the thin film with an electrically insulating adhesive having a dielectric characteristic such that the free end of the burr-like portion and the electrode metal foil is spaced

Abstract: A surface protecting material is prepared by having a soft aluminum foil having a thickness of 15 to 50.mu. superposed on the surface of a substrate of plastic film such as polyethylene, polyvinyl chloride, or polyester and further having a layer of resin containing at least 10% fluorine resin or silicone resin and having not more than 1.mu. in surface coarseness superposed directly on the surface of the aluminum foil or indirectly thereon through the medium of a colored layer formed thereon. This surface protecting material is useful for decorating and repairing various kinds of goods and to obtain a flat surface thereon.

Abstract: A fin for a heat exchanger which is highly hydrophilic and rustproof comprises a substrate of aluminum or an aluminum alloy having thereon a hydrophilic coat including therein a proteinaceous substance having a peptide bond, e.g., gelatin. Further enhancement of the fin's affinity for water is obtained by using a hydrophilic coat prepared by mixing a water soluble coating material, such as acrylic paint, with the proteinaceous substance. The coat is made by applying a water-based coating composition including the proteinaceous substance to a substrate and drying it in the temperature range of 100.degree. to 250.degree. C., and preferably 180.degree. to 220.degree. C.

Abstract: A laminated thermal insulation sheeting for covering ducts and pipes wrapped up by a thermal insulator such as glass wool and rock wool, includes an aluminum sheet and a metal network disposed on and over a surface of the aluminum sheet. A substantially transparent film of synthetic resin is placed on the metal network and has portions bonded to the surface of the aluminum sheet through interstices in the metal network. The aluminum sheet comprises aluminum foil or an aluminum-metallized film of synthetic resin, and may be lined with a backing material.

Abstract: Substrate materials are prevented from deteriorating from exposure to intense heat by protecting the substrate with aluminum foil having at least one surface thereof roughened and subjecting said substrate to heat. The foil is capable of resisting temperatures in excess of 1,000.degree. C.