FIELD OF THE INVENTION
The present invention generally relates to a seal for a cargo/container; and more particularly, to provide a passive RFID based tamperproof sealing device with two phase locking mechanism.
BACKGROUND
Generally, in a cargo industry, the cargo containers are widely employed to ship goods from one location to other location. The cargo containers are widely used in ocean going ships for shipping goods among different continents. Each ship can carry hundreds of such cargo containers. The containers have doors which are locked shut with hasps. Commonly, the hasps are secured with mechanical locks or seals. Such lock includes a strip seal, a rope wire seal, a drum seal, a hex cable seal, a security seal, a padlock, a deadbolt, a lever handle lock, a handcuff seal, a cam lock, a euro profile cylinder, a interchangeable core (IC) cylinders lock, a vending/t-handle lock, a rim latch lockand a steel bolt.
Over the period of time, burgles/thieves have compromised the security of such cargo doors by compromising the aforementioned locks.The thieves compromise such locks and open the cargo doors and takeout all the valuable items are stored inside the containers. The cargo containers are shipped via a ship, a train and a truck. The cargo containers are at a higher risk of tampering, theft and vandalism, during the transportation, unloading or loading. For theft and tampering prevention, the existing seals are assigned serial numbers and such seals are then assigned to a container. The serial number, container ID, a shipment carrier, and a destination is entered in the record (i.e. computer or hand written). However, despite of all such efforts, seals are tampered.
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Prevention of such tampering is critical to safeguard the valuable goods within the cargo. Currently, available sealing devices generally include two components: a male part which is inserted into a female part to complete a lock. However, such male part, which when inserted into the female part, can move within the female part, and thereby creates an ambiguity whether, previously sealing device was tampered before reaching to a destination.
Further, when any metal part is brought in contact with the RFID chip in the sealing device, the RFID circuit is completed and with an appropriate reading device the unique RFID identifier information is subject to be stolen. The amount of information which could be learned about the goods from the stolen RFID chips is quite a lot. Plus, you never know what the thieves are planning on doing with the information. For example, the stolen RFID tag can be used to steal the contents of the container, or can be affixed in another container carrying illegal contraband or materials.
Thus, there remains a need for further contributions in this area of technology. More specifically, a need exists in the area of technology for sufficiently securing locks for the cargo containers.
OBJECTS OF THE INVENTION
An object of the present invention is to provide a device for a security seals to a cargo container.
An object of the present invention is to provide the tamperproof security seals to the cargo container.
An object of the present invention is to prevent loss of the valuable goods by theft products during a shipment, a loading and/or a unloading of the cargo container.
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An object of the present invention is to prevent loss of RFID information by providing a rotational locking mechanism that prevents loss of RFID data prior to engaging the lock.
The present invention generally relates to a seal for cargo/container; and more particularly, to an apparatus and methods for using RFID tag that can indicate the sealing condition of a container and provide the product information to a RFID reader.
SUMMARY OF THE INVENTION
The present invention generally relates to a seal for a cargo/container; and more particularly, to provide a tamperproof RFID based electronic sealing device with a rotational locking mechanism.
In an embodiment, a RFID based electronic sealing device comprises: an elongated metallic antenna member, having a top part and bottom part, and having a hollow inner space; a metal rod surrounded by an insulating member is affixed inside the hollow inner space; one end of the metal rod protrudes outside the hollow inner space near the bottom part to form a first contact; a body member comprising plurality of compartments and having a proximal end and a distal end; a first compartment at the proximal end comprises a printed circuit board (PCB) having a second contact, encompassed in a hollow cylinder having a base part and a tip part, the second contact protrudes outside the hollow cylinder from the tip part; a second compartment above the first compartment comprises a restraining disc having a metal embedded therein, the restraining disc comprises a protrusion on a first face having a third contact, and an etching on a second face to form a fourth contact, the third contact and fourth contact form a conductive path; a third compartment above the second compartment comprises an engagement ring; the bottom part of the elongated metallic antenna member is operable to fit into place with the protrusion in the restraining disc and connect the first contact
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and the third contact, and further rotated to engage the second contact with the fourth contact to activate the RFID connection.
In an embodiment, the a RFID based electronic sealing device provides a top part of the elongated metallic antenna member covered by a protective cover having a head part and a tail part, and the tail part having one or more bulges.
In an embodiment, one end a first spring is connected to the metal rod and the second end of the spring is connected to the top part of the elongated metallic antenna member.
In an embodiment, a circular groove is cut at the bottom part of the elongated metallic antenna member having a retaining ring affixed therein.
In an embodiment, one end of a second spring is connected to the PCB and the second end of the spring is connected to the base of the hollow cylinder.
In an embodiment, a spring holder is affixed to the side of the tip part of the hollow cylinder, and having affixed therein a third spring protruding towards the restraining disc.
In an embodiment, the body member is covered with a protective covering having a cylindrical opening at the distal end of the body member.
In an embodiment, the bottom part of the elongated metallic antenna member is inserted into the circular opening and passes through the engagement ring to fit into place with the protrusion in the restraining disc.
In an embodiment, the spring constant of the first spring is greater than the spring constant of second and third spring.
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In an embodiment, the cylindrical opening further comprises one or more hump on the inner surface.
In an embodiment, the one or more bulges are configured to be held in place by the one or more hump after rotation.
In an embodiment, the body member is closed by a butt plug at the proximal end.
In an embodiment, the hollow cylinder is covered by a metallic foil.
In an embodiment, the device can be configured on a cargo container, a shipment box and a wagon door.
BRIEF DESCRIPTION OF DRAWING
Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:
FIG. 1 is a schematic illustration of an elongated metallic antenna member of a RFID based electronic sealing device, in accordance with an embodiment of the present disclosure.
FIG. 2 is a schematic illustration of a body member of a RFID based electronic sealing device, in accordance with an embodiment of the present disclosure.
FIG. 3 is a schematic illustration of a locked RFID based electronic sealing device, in accordance with an embodiment of the present disclosure.
DESCRIPTION OF EMBODIMENTS
The following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other
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embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
The present invention generally relates to a seal for a cargo/container; and more particularly, to provide a tamperproof RFID based electronic sealing device with a two phase locking mechanism.
In an embodiment, a RFID based electronic sealing device comprises: an elongated metallic antenna member, having a top part and bottom part, and having a hollow inner space; a metal rod surrounded by an insulating member is affixed inside the hollow inner space; one end of the metal rod protrudes outside the hollow inner space near the bottom part to form a first contact; a body member comprising plurality of compartments and having a proximal end and a distal end; a first compartment at the proximal end comprises a printed circuit board (PCB) having a second contact, encompassed in a hollow cylinder having a base part and a tip part, the second contact protrudes outside the hollow cylinder from the tip part; a second compartment above the first compartment comprises a restraining disc having a metal embedded therein, the restraining disc comprises a protrusion on a first face having a third contact, and an etching on a second face to form a fourth contact, the third contact and fourth contact form a conductive path; a third compartment above the second compartment comprises an engagement ring; the bottom part of the elongated metallic antenna member is operable to fit into place with the protrusion in the restraining disc and connect the first contact and the third contact, and further rotated to engage the second contact with the fourth contact to lock the device.
In an embodiment, the a RFID based electronic sealing device provides a top part of the elongated metallic antenna member covered by a
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protective cover having a head part and a tail part, and the tail part having one or more bulges.
In an embodiment, one end a first spring is connected to the metal rod and the second end of the spring is connected to the top part of the elongated metallic antenna member.
In an embodiment, a circular groove is cut at the bottom part of the elongated metallic antenna member having a retaining ring affixed therein.
In an embodiment, one end of a second spring is connected to the PCB and the second end of the spring is connected to the base of the hollow cylinder.
In an embodiment, a spring holder is affixed to the side of the tip part of the hollow cylinder, and having affixed therein a third spring protruding towards the restraining disc.
In an embodiment, the body member is covered with a protective covering having a cylindrical opening at the distal end of the body member.
In an embodiment, the bottom part of the elongated metallic antenna member is inserted into the circular opening and passes through the engagement ring to fit into place with the protrusion in the restraining disc.
In an embodiment, the spring constant of the first spring is greater than the spring constant of second and third spring.
In an embodiment, the cylindrical opening further comprises one or more hump on the inner surface.
In an embodiment, the one or more bulges are configured to be held in place by the one or more hump after rotation.
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In an embodiment, the body member is closed by a butt plug at the proximal end.
In an embodiment, the hollow cylinder is covered by a metallic foil.
FIG. 1 is a schematic illustration of the elongated metallic antenna member 100 of a RFID based electronic sealing device, in accordance with an embodiment of the present disclosure. The elongated metallic antenna member 100 is made up metallic material 102 with a hollow inner space 122 in the center. The elongated metallic antenna member 100 consists a top part and a bottom part. The bottom part of the elongated metallic antenna member 100 consists of two or more extensions 104. Alternatively, the two or more extensions 104 can be cut or manufactured using any of the conventional manufacturing processes like milling joining, turning, drilling on the metallic material 102. The top part of the elongated metallic antenna member 100 is covered by a protective cover 106 having a head part 120 and a tail part (not shown). The end of the tail part consists of one or more bulges 116 that protrude out of the tail part and helps is securing the elongated metallic antenna member tightly during the locking operation. The larger head part 120 prevents sliding/passing of the elongated metallic antenna member element 100 through the hasp/latch of the cargo container.
In an embodiment, a metal rod 108 covered by an insulating material 114, is configured to be inserted into the hollow inner space 122 of the elongated metallic antenna member 100. The metal rod 108 is covered by an insulating material 114 so as to insulate the metal rod from the metallic material 102. One end of a first spring 110 is attached to the metal rod 108 and the other end of the first spring 110 is connected to the top part of the elongated metallic antenna member. The spring 110 provides a springing action, both to the metallic rod 108 and the insulating material 114, during the locking
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operation thereby enabling both to move back and forth inside the hollow inner space 122 of the elongated metallic antenna member 100. The metal rod 108 and insulating material 114 is configured to protrude out of the hollow inner space 122, wherein the tip of the metal rod protrudes further out of the insulating member to form a first contact 112. Further, a groove 118 is cut circumferentially at the bottom part of the elongated metallic antenna member after the tip part of the protective cover 106. A retaining ring (not shown) is configured to be affixed in the groove.
In an embodiment, the protective cover 106 can be constructed from a material, selected from a set of: a plastic, a polyethylene terephthalate (PET or PETE), a high-density polyethylene (HDPE), a polyvinyl chloride (PVC), a low-density polyethylene (LDPE), a polypropylene (PP), a polycarbonate polystyrene, a carbon fibre.
In an alternative embodiment, the extensions 104 can be constructed from a material, selected from a set of: a plastic, a polyethylene terephthalate (PET or PETE), a high-density polyethylene (HDPE), a polyvinyl chloride (PVC), a low-density polyethylene (LDPE), a polypropylene (PP), a polycarbonate polystyrene, a carbon fibre.
The sealing device is continuous under exposure of the extreme weather conditions such as high heat, sun light, moisture, water, rain and cold, therefore it would require special material which can withstand afore mentioned environmental condition. The elongated metallic antenna member 102, the two or more extensions 104, metal rod 108, the retaining ring a can be manufactured from the variety of material which can provide sufficient strength, corrosion resistance, light weight, environment friendly and economical. The exemplary material can be used are: a metal such as stainless steel, boron alloy, Titanium, aluminium, copper, magnesium, brass, tin, iron, metal alloy.
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In an alternative embodiment, the two or more extensions 104, can be constructed from a material, selected from a set of: a plastic, a polyethylene terephthalate (PET or PETE), a high-density polyethylene (HDPE), a polyvinyl chloride (PVC), a low-density polyethylene (LDPE), a polypropylene (PP), a polycarbonate polystyrene, a carbon fibre.
In an embodiment, the head 120 can be of any shape such as a sphere, a cone, a pyramid, a cylindrical, a diamond and a prism. In an embodiment, the head 120 is tapered in nature (not shown in the figure) and an outer diameter of the head decrease towards the top part of the elongated metallic antenna member
The groove 118 can be in form of a ring, a flute, a recess, a channel, a bulge, a projection, a ridge, thread, a rib, and a trench. The grooves 118 can have a pointed shape such as “V” shaped or inverted “V” shaped, curved shaped such as a convex (bulging outwards) shaped or a concave (bulging inwards) shaped, and a flat shaped. The grooves can have a continuous surface (i.e. annular ring) or a disconnected surface. In an embodiment, the grooves 118 can be in form of a single annular ring, a “c” shaped ring, a ring which can be divided in multiple segments (i.e. two half circle ring), a ring which half circle ring, a line of space apart notches, a line of space apart bulges, randomly spaced notches, randomly placed budges. The grooves 118 can have a specific spatial arrangement i.e a distance between the two grooves and and/or an angle between the grooves on the peripheral surface of the tip surface.
FIG. 2 is a schematic illustration of a body member of a RFID based electronic sealing device, in accordance with an embodiment of the present disclosure. As illustrated, the body member 200, comprises of one or more compartments to accommodate the components. The body member has a proximal and distal end. The proximal end has an opening and the distal end has a butt plug 234 that is configured to
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seal the overall assembly of the body member. The body member has an inner casing 202 in which the components are affixed. The inner casing has slots provided therein at appropriate places to fit the components in their respective places. The slots enable the components to be affixed tightly without any movement. In a first compartment at the distal end, a Printed Circuit board (PCB) 220 is provided inside a hollow cylinder 218. The PCB is inserted inside the hollow cylinder from the tip part of the hollow cylinder. The base part of the hollow cylinder is closed and has one end of a second spring 226 connected to it. The other end of the spring 226 is connected to the PCB. This spring enables the PCB 220 to move in and out of the hollow cylinder 218. The PCB has electronic components affixed therein to form a circuitry. When a RFID chip 224 along with circuitry is powered, a RFID reader (not shown) is configured to read the RFID tag information and determine the status of the RFID based electronic sealing device. The PCB 220 has a tip protruding outside the hollow cylinder 218 and forms a second contact point. Affixed to the side of the tip part of the hollow cylinder is a spring holder 228 having a third spring 230 affixed therein. The hollow cylinder and the spring holder are covered by a metal foil. This is done to prevent the RFID tag information from being read. It should be appreciated that, the spring constant of the first spring 110 is greater than the spring constant of the third spring 230, which in turn has a spring constant greater than the second spring 226. Such a property of the springs are provided for smooth and efficient functioning of the electronic sealing device.
In a second compartment, that is just above the first compartment is attached a restraining disc 210. The restraining disc is made of plastic material. The restraining disc has embedded therein a metal component. In a first face of the restraining disc 210 is a protrusion 212, that comes out of the disc. The protrusion is provided in such a face of the restraining disc that is facing the proximal end of the body
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member 200. The embedded metal component is also embedded in the protrusion and slightly comes out of the protrusion so as to form a third contact 214. On the second face of the restraining disc 210, a portion is etched out so as to make visible a portion of the embedded metal. The visible portion of the embedded metal forms a fourth contact point 216. The third contact 214 and the fourth contact 216 are part of the same embedded metal and hence form a conductive path. It is just that they are provided on the opposite faces/sides of the restraining disc. The restraining disc is configured to slightly move back and forth in the second compartment during the locking phase.
In a third compartment, that is just above the second compartment is attached a engagement ring 208. The engagement ring is configured to hold the bottom part of the elongated metallic antenna member. The engagement ring is further configured to pull out the retaining ring affixed in the groove of the elongated metallic antenna member and affix it to a slot (not shown) in the inner surface of the engagement ring 208. This is provided so that the elongated metallic antenna member can be retained in the body member and cannot be pulled out, once in a locked state. The inner casing 202 of the body member 200 is provided with a protective cover 204 so as to fully shield the body member from extreme climate and weather conditions. The protective cover 204 has a cylindrical opening 206 at the proximal end of the body member. The diameter of the cylindrical opening 206, is made slightly larger than the end to end length of the tip part of the elongated metallic antenna member, so as to enable the tip part to smoothly be inserted via the cylindrical opening 206. The cylindrical opening consist of two or more humps 232 diagonally opposite to each other. The humps are provided to prevent the elongated metallic antenna member from being further rotated or twisted once in a locked state.
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In an embodiment, the protective cover 204 and restraining disc 210 can be constructed from a material, selected from a set of: a plastic, a polyethylene terephthalate (PET or PETE), a high-density polyethylene (HDPE), a polyvinyl chloride (PVC), a low-density polyethylene (LDPE), a polypropylene (PP), a polycarbonate polystyrene, a carbon fiber.
The metal component embedded in the restraining disc 210 can be manufactured from the variety of material which can provide sufficient strength, corrosion resistance, light weight, environment friendly and economical. The exemplary material can be used are: a metal such as stainless steel, boron alloy, Titanium, aluminium, copper, magnesium, brass, tin, iron, metal alloy.
FIG. 3 is a schematic illustration of a locked RFID based electronic sealing device, in accordance with an embodiment of the present disclosure. In this figure as illustrated, the elongated metallic antenna member is shown to be inserted into the body member, thereby locking the RFID based electronic seal. The detailed procedure of how to lock is described below. It should be noted that for sake of clarity, the procedure is being described with components as numbered in FIG. 1 and FIG. 2.
In operation, the locking mechanism has been described in two phases, a inserting phase and a rotation phase. During the inserting phase, the bottom part of the elongated metallic antenna member 100, along with the first contact 112 and two or more extensions 104, is inserted through the cylindrical opening 206 in the protective cover 204, of the body member 200. The insertion is performed till the point the first contact 112 in the metal rod 108, comes in contact with the third contact 214 in the protrusion 212 of the restraining disc 210. Further during the inserting phase, the two or more extensions 104, are configured to engage with the protrusion in such a manner that, first the metal rod which comes in contact with the protrusion in
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the restraining disc is slightly pushed inward in to the hollow inner space due to the first spring. Then the protrusion 212 gets into the space between the extensions 104, thereby enabling the extensions to rotate or move the protrusion 212 during the rotation phase of the locking mechanism. The bottom part of the elongated metallic antenna member 100, along with the first contact 112 and two or more extensions 104 passes through the engagement ring 208 during this inserting phase. Also during the inserting phase, the retaining ring affixed in the groove 118 of the elongated metallic antenna member, engages with a slot (not shown) in the inner surface of the engagement ring 208. This is provided so that the elongated metallic antenna member can be retained in the body member and cannot be pulled out, once in a locked state. Also during the inserting phase, the one or bulges 116, provided in the tail part of the protective cover 106, gets inserted into the cylindrical opening 206 of the protective cover 204.
In the rotational phase, the elongated metallic antenna member is rotated at an angle, either in clockwise or anticlockwise direction. This rotational movement aligns the second contact 222 in the PCB 220 in line with the fourth contact 216 on the restraining disc 210. The elongated metallic antenna member is then pushed slightly to connect the second contact and the fourth contact to activate the RFID connection and lock the sealing device. The spring constants of the first, second and third springs play a role in holding the restraining disc in the locked state when the elongated metallic antenna member is pushed to lock the device. The first spring has a higher spring constant and hence is able to push the second and third spring back during the locking phases. Once locked, the elongated metallic antenna member cannot be moved back or rotated back. When rotated the one or more bulges 116 is configured to be locked in the cylindrical opening 206, by the one or more humps 232. This locking
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ensures that the antenna member cannot be rotated in backward direction after locking and thus removing the sealing effect.
In an embodiment, the RFID based electronic sealing device is attached to doors of the container/wagon/trucks etc and the two phase locking operation employed to seal the container/wagon/truck. Once locked the seal is configured to be unlocked properly only at the destination. In case of tampering midway during the transit, like for example if the elongated metallic antenna member is cut or tampered with, the metal rod inside the hollow inner space ceases to be supported by the first spring which recoils and disconnects the first contact from the third contact. Once the metal rod is disconnected due to loss of contact with the first spring, the third spring which has a greater spring constant than the second spring, comes in to action and pushes the restraining disc slightly. This action then disconnects the second contact in the PCB with the fourth contact in the restraining disc. This secures the RFID chip inside the body member as no contact is now available for the chip. The tampering becomes evident at the destination or midway in any of the reader as the RFID chip is not anymore transmitting the RFID information. Thus the seal is made tamper proof.
In an embodiment, the design of the RFID based electronic sealing device is such that, the RFID information cannot be read without breaking the body member of the sealing device. Even if one tries to insert as metallic part inside the body member, the PCB having the RFID chip is not connected and hence the RFID information is not revealed as in similar prior art RFID based electronic locks.
In an alternative embodiment, the PCB which is present in the body member, and the antenna which is present in the elongated member, can be interchangeably provided in the RFID based electronic sealing device. i.e. PCB can be affixed in the elongated member and the
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antenna can be affixed in the body member. In such a configuration, minor adjustments to the operation of the locking phases needs to be done, however, the two phase locking mechanism can be achieved. It should be appreciated that, such a device can be constructed without departing from the limit and scope of the invention.
In an embodiment, when the RFID based electronic seal passes or comes within a preset range/proximity of an RFID reader in a remote control center (not shown in the figure), the RFID reader sends electromagnetic energy in the direction of the sealing device which is sensed by the antenna present in the sealing device. This energy is converted into RF waves. The sealing device antenna draws energy from the RF waves and activates the electronic components. Upon activation of the electronic components, an information/signal corresponding to the identification of the sealing device is generated, wherein the information can include RFID related data such as RFID signal. This RFID signal is interpreted by the RFID reader in the remote control center to identify the unique information of the sealing device. Disengagement or withdrawal of the elongated metallic antenna member element 100 coupled to the body element 200, breaks the connection between the antenna and the electric conductive probes, which results in deactivation off the electronic circuitry. Hence, the seal no longer transmits the identification data to the remote control center. Thus, the remote control center may realise that the seal has been tampered or removed. The remote control server may scrutinize the removal of the seal by an authorized person. In an event of unauthorized access of the sealing device notice, center may transmit the alerts/notifications. The alert may be in form of a sound, a tone, a SMS, an email etc. The alert may be transmitted to a device associated witha cargo owner, a shipping company, the governmental agencies and/or the other server arrangements.
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In an embodiment, a unique identification code can be assigned to the sealing device 300 through the RFID tag. In an another embodiment, the unique identification code can be used as a secrete key, which was pre-shared to the owner of the device and to a third party who intend to receive the cargo. On delivery of the cargo either the owner or the third party may enter/read the unique identification code to open the seal. In case, the sealing device was tampered after getting sealed, the code which is required to open the seal device will not able to open the sealing device thereby an indication that the sealing device is compromised.
The components of the sealing device can be manufactured by any methods are known state of the art such as an injection molding, an extrusion molding, a blow molding, a compression molding, a rotational molding, a vacuum forming, a die casting, a sand casting, stamping, a forging, a 3D printing, a chemical vapour deposition, a sputter deposition, a sintering, a pressing, a rolling, a bending, a trimming, a shaving, a notching, etc.
ADVANTAGESOF THE INVENTION
The present disclosure overcomes one or more disadvantages associated with conventional systems.
The present invention provides a device for a security seals to a cargo container.
The present invention provides the tamperproof security seals to the cargo container.
The present invention provides prevention of reading the RFID information prior to locking by way of two phase locking mechanism.
The present invention prevents loss of the valuable goods by theft products during a shipment, a loading and/or a deloading of the cargo container.
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The present invention generally relates to a seal for cargo/container; and more particularly, to an apparatus and methods for using RFID tag that can indicate the sealing condition of a container and provide the product information to a RFID reader.

CLAIMS
We claim:
1. A RFID based electronic sealing device comprising:
an elongated metallic antenna member, having a top part and bottom part, and having a hollow inner space; wherein a metal rod surrounded by an insulating member is affixed inside the hollow inner space; wherein one end of the metal rod protrudes outside the hollow inner space near the bottom part to form a first contact;
a body member comprising plurality of compartments and having a proximal end and a distal end;
wherein a first compartment at the distal end comprises a printed circuit board (PCB) having a second contact, encompassed in a hollow cylinder having a base part and a tip part, wherein the second contact protrudes outside the hollow cylinder from the tip part;
wherein a second compartment above the first compartment comprises a restraining disc having a metal embedded therein, wherein the restraining disc comprises a protrusion on a first face having a third contact, and an etching on a second face to form a fourth contact, wherein the third contact and fourth contact form a conductive path;
wherein a third compartment above the second compartment comprises an engagement ring;
wherein, the bottom part of the elongated metallic antenna member is operable to fit into place with the protrusion in the restraining disc and connect the first contact and the third contact, and further rotated to engage the second contact with the fourth contact for RFID activation.
2. The sealing device of claim 1, wherein a top part of the elongated metallic antenna member is covered by a protective cover having a
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head part and a tail part, and the tail part having one or more bulges.
3. The sealing device of claim 1, wherein one end a first spring is connected to the metal rod and the second end of the spring is connected to the top part of the elongated metallic antenna member.
4. The sealing device of claim 1, wherein a circular groove is cut at the bottom part of the elongated metallic antenna member having a retaining ring affixed therein.
5. The sealing device of claim 1, wherein one end of a second spring is connected to the PCB and the second end of the spring is connected to the base of the hollow cylinder.
6. The sealing device of claim 1, wherein a spring holder is affixed to the side of the tip part of the hollow cylinder, and having affixed therein a third spring protruding towards the restraining disc.
7. The sealing device of claim 1, wherein the body member is covered with a protective covering having a cylindrical opening at the proximal end of the body member.
8. The sealing device of claim 1, wherein the bottom part of the elongated metallic antenna member is inserted into the circular opening and passes through the engagement ring to fit into place with the protrusion in the restraining disc.
9. The sealing device of claims 3, 5 and 6, wherein the spring constant of the first spring is greater than the spring constant of second and third spring.
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10. The sealing device of claim 7, wherein the cylindrical opening further comprises one or more hump on the inner surface.
11. The sealing device of claim 10, wherein the one or more bulges are configured to be held in place by the one or more hump after rotation.
12. The sealing device of claim 1, wherein the body member is closed by a butt plug at the distal end.
13. The sealing device of claim 1, wherein the hollow cylinder is covered by a metallic foil.