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  2. Induction sealing - Wikipedia

    en.wikipedia.org/wiki/Induction_sealing

    Induction sealing is the process of bonding thermoplastic materials by induction heating. This involves controlled heating an electrically conducting object (usually aluminum foil) by electromagnetic induction, through heat generated in the object by eddy currents. Induction sealing is used in many types of manufacturing.

  3. Tamper-evident technology - Wikipedia

    en.wikipedia.org/wiki/Tamper-evident_technology

    Tamper-evident currency bags have a seal that reveals if the bag has been tampered with A foil inner seal on a bottle Main articles: Security bag , Security tape , and Tamper-evident band Tamper-evident design is perhaps most visible in the process of product packaging and labeling , where it can be vital to know that the product has not been ...

  4. Security bag - Wikipedia

    en.wikipedia.org/wiki/Security_bag

    Envelopes with security features are called security envelopes as well as security bags. Cash for deposit in a bank is often placed in a special deposit bag with security features. [ 1 ] [ 2 ] When they are used to contain items related to a crime, special evidence bags are used. [ 3 ]

  5. Seal (emblem) - Wikipedia

    en.wikipedia.org/wiki/Seal_(emblem)

    The seal-making device is also referred to as the seal matrix or die; the imprint it creates as the seal impression (or, more rarely, the sealing). [1] If the impression is made purely as a relief resulting from the greater pressure on the paper where the high parts of the matrix touch, the seal is known as a dry seal ; in other cases ink or ...

  6. Glass-to-metal seal - Wikipedia

    en.wikipedia.org/wiki/Glass-to-metal_seal

    Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...

  7. Hermetic seal - Wikipedia

    en.wikipedia.org/wiki/Hermetic_seal

    A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases). The term originally applied to airtight glass containers but, as technology advanced, it applied to a larger category of materials, including metals , rubber , and plastics .

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