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Electronic seal

  • US 5,189,396 A
  • Filed: 06/06/1991
  • Issued: 02/23/1993
  • Est. Priority Date: 06/16/1990
  • Status: Expired due to Term
First Claim
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1. An electronic seal for recording the time of changes in the seal state and storing logistics data comprising:

  • a sealing strip fixed in a casing and formed as a safety loop; and

    a monitoring device located in the casing and attached to said sealing strip for monitoring the seal state, said monitoring device includingi. a power source operatively connected to said monitoring device;

    ii. an opening sensor;

    iii. a clock generator;

    iv. a counter clocked by said clock generator for generating a time value; and

    v. a memory containing starting time, time zone, loading point, destination, country, owners, forwarding agents and transportation information, said opening sensor detecting changes in the seal state and storing an associated time value in said memory, said monitoring device generating time values at periodic intervals, detecting changes in the seal state and recording time values associated with changes in the seal state so that the time and duration of seal openings as well as the logistics of the casing, determines the location of the casing at the time of a seal opening.

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