RFID product identification and tracking system

[0001] It is known in the prior art to apply product identification to cartons, packages and the like, often by means of application of a bar code or other such identification system.

[0002] Radio frequency identification (RFID) has developed as a technology for identifying packages, to facilitate their tracking and to more readily determine the information that has been applied to the package.

[0003] Typically RFID technology includes the placement of a tag in the form of a microchip with an antenna on the package, such that the microchip can be encoded with information via the antenna, so that one can subsequently use a reader to read data off the microchip. Typically, the technology uses radio waves.

[0004] The RFID tags (or transponders) can either be of the active RFID systems, or they can be of the passive RFID systems.

[0005] Active RFID systems are ones in which the chip sends out a signal when it approaches a reader. Typically, such active systems must employ batteries, but being active systems, have a wide range, but generally are more costly than passive RFID systems.

[0006] Passive RFID systems employ tags with no power source and no transmitter. However they do employ a microchip and an antenna, to which the microchip is electrically connected.

[0007] Because passive tags operate at generally lower frequencies, and because they do not employ batteries, they have limitations on the distance at which they can be read from a reader. However, because they are less costly than active systems, passive tags can be used to tag packages or other items, and eventually discarded.

[0008] The present invention is directed to an apparatus and method for RFID tagging of packages such as boxes of candies or other goods, in which a conveyor is used for transporting the packages, with the RFID tags being applied to the packages, with the RFID tags being encoded via a transmitter, and with the encoding being done in the proximity of a palletizer system that receives packages from the conveyor and delivers them to a pallet.

[0009] Accordingly, it is an object of this invention to provide a method and apparatus for RFID tagging of packages as they are delivered along a conveyor, by encoding tags applied to the packages with information related to the goods being packaged, its history, date of manufacture, location of manufacture, or any other information of interest, for use by the manufacturer of the packaged goods, by a customer for such goods, for warehouse control, or for any other purpose.

[0010] It is another object of this invention to accomplish the above object, wherein the system recognizes pre-existing information appearing on the package, such as on a barcode or the like, and for sensing such information, irrespective the height of the package itself, and for delivering such information to a tag either already applied to a package or about to be applied to a package.

[0011] It is another object of this invention to accomplish the above objects, wherein a palletizer system is used, in which a plurality of receiving lines are adapted to receive packages from the conveyor and to deliver them to pallet stations.

[0012] It is another object of this invention to accomplish the above objects, wherein the application of the tags to packages can be vertically adjustable, depending upon the height of the package and/or the height of application of the tag to the package.

[0013] It is a further object of this invention to accomplish the above objects, wherein various functions of the tagging are computer-operated.

[0014] It is another object of this invention to accomplish the above objects, whereby application of tags to packages is by means of separating tags from a tape having multiple tags thereon, and delivering them to the packages via fluid-application.

[0015] It is a further object of this invention to accomplish the above objects, wherein the encoding of the tags is accomplished at a location proximate the situs of tag application to the package.

[0016] Other objects of the invention will be readily apparent upon a reading of the following brief descriptions of the drawing figures, the detailed descriptions of the preferred embodiments, and the appended claims.

[0025] Referring now to the drawings in detail, reference is first made to FIG. 1, wherein a conveyor 10 is illustrated, mounted on a plurality of rollers such as those 11, with the conveyor 10 traveling in the direction indicated by the arrow 9, from right to left, for transporting packages 12, 13, 14, 15, etc. of various heights, with the packages carrying product identification on the exterior thereof, such as in the form of barcodes 16, 17, 18 and 20, and with the packages being at various heights “E”, “F”, “G”, and “H”, as shown in FIG. 1.

[0026] Thus, the packages 12-15 or the like can be delivered past a sensor box 38 at a sensing station generally shown at 21.

[0027] At the sensing station 21 there is a master computer 22.

[0028] Thus, the infrared or other type of sensor 43 on sensor box 38 (FIG. 1), on supports 37 will detect the barcodes 16, 17, 18 and 20 (FIG. 1), for example, and transmit the information read from those barcodes or other indicia back to the computer 22 (FIG. 1), via appropriate respective electrical connector line 50.

[0029] It will also be apparent that the sensor 43 (FIG. 2) has the ability to cover a range as is shown by the array 39, as indicated in plan view at the right end of FIG. 3.

[0030] The applicator system 65 (FIG. 3) includes its own control box 66 (FIG. 4).

[0031] The applicator system 65 is operated from computer 22 (FIG. 3), via control line 56, for controlling the vertical position upwardly and downwardly of the applicator system 65, in the directions of the arrows 63, 64.

[0032] Such vertical positioning for the applicator mechanism system 65 is by controlling the direction of rotation of a screw-type vertically disposed drive shaft 58, via electric line 57 which controls a drive motor 59 or the like, which engages with a ball bushing or the like (not shown) inside a vertically moveable applicator lift bar 62, as the vertical shaft 58 is driven rotationally in one of the directions 60, 61, illustrated by the arrows in FIG. 4, to drive the lift bar 62 upwardly or downwardly in the direction of one of the arrows 63, 64, to raise or lower the entire applicator system 65, as may be desired, to accommodate the placement of a tag at a predetermined vertical height on a box “B” as shown in FIG. 4.

[0033] Mounted on the vertically moveable applicator system 65 is a roll 67 of tape 68, that carries a plurality of tags 78 at regularly spaced-apart intervals, which tags 78 are adhesively carried on the tape 68, but are removable therefrom as will be described in detail later herein.

[0034] Thus, the roll 67 is shaft-mounted as shown, for rotation, with the tape 68 passing over an idler roll 70, to be delivered downwardly, around another idler roll 71, then upwardly over yet another idler roll 72, then leftwardly as shown in FIG. 4, around idler roll 73.

[0035] With reference now to FIG. 4A, the tape 68, with the tag 78 still carried thereon, passes around drive roll 74, which is rotating in the direction shown, wherein a means for removal of tag 78 is provided, in the form of a doctor blade or scraper blade 79, which scrapes the surface of the tape 68, removing a tag 78 therefrom as the tape 68 moves in the downward direction indicated by the arrow 80. After the tag 78 is scraped from the tape 68, the tape 68 then moves upwardly as shown by its upwardly moveable tape run 75 traveling in the direction of arrow 81.

[0036] As the tag 78 is scraped from the tape 68, a box “B” as shown in FIGS. 4 and 4A has been moved along the conveyor 10 in the direction of the arrow 89, appropriately centrally positioned thereon by means of positioning rollers 82, 83, with the box “B” disposed against a longitudinally oriented guide 84, whereupon a position sensor 85 detects the position of the box “B” and transfers that information regarding the position of the box via an electric line 86, to a control zone 87 of the applicator system 65. The control zone 87 is connected via control line 88 to control zone 66, which controls the delivery of tags via tape, by means of controlling the rotation of roller 74.

[0037] As a tag 78 is scraped from the tape 68 as shown in FIG. 4A, by means of the doctor blade 79, a motor 96 controls the operation of a valve 95, to deliver compressed air via line 94 to an air delivery plate 90, in order to provide a fluid drive application of the tag 78 onto a box “B”, as is shown in phantom for the tag 78 in FIG. 4A.

[0038] The motor 96 is controlled from the computer 22 via control line 97.

[0039] Substantially contemporaneous with or slightly before or after application of the tag 78 to a box “B” as shown in FIG. 4A, the computer 22, having received information regarding the packages being delivered along the conveyor from the barcodes or other information (i.e., information related to the goods being packaged, its history, date of manufacture, location of manufacture, or any other information of interest) transforms such information into a code, and transmits the same to a tag 78 via radio waves, which engage the antenna 101 of a tag 78 as shown in FIG. 5, for example, for imparting such information onto an electronic chip 100 carried on the tag 78, such that the encoded information is carried by the tag 78 as shown in phantom in FIG. 4A, having been encoded thereon via a radio frequency transmitter 91 carried on transmitter mount member 92, which receives the information from the computer 22 via line 93.

[0040] With reference now to the left end of FIG. 3 and to FIG. 6, the thus-encoded boxes “B” (not shown) continue to travel along the conveyor 10 in the direction indicated by the arrows 9 in FIG. 3, to various discharge stations, wherein the packages or boxes “B” may be transported from the conveyor 10 to various conveyor receiver lines, for further delivery to various pallet stations as will now be described.

[0041] In one embodiment of the invention, the computer 22, remembering the sequence of various boxes “B” as have already been tagged, can deliver such information via control line 102 to various discharge controllers such as those 106, 107, 108, 110, 111, 112, 113 and 114, and, with respect to controllers 106-108, via lines 103-105, in order to control the timing of box pushers or like mechanisms 116, 117, 118, 120, 121, 122, 123 and 124, which, respectively carry box pusher plates 125, 126, 127, 128, 130, 131, 132 and 133, for pushing boxes from the conveyor 10 onto an appropriate one of the receiver conveyor lines 136, 137, 138, 140, 141, 142, 143 and 144, as shown in FIGS. 3 and 6 in the direction of the arrows 135 (FIG. 3).

[0042] As an alternative to the operation of the discharge pushers 116, 117, 118, 120, 121, 122, 123 and 124 being operated in a predetermined or “remembered” sequence via the computer, the pushers can be actuated individually. In this regard each such pusher, 116, 117, 118, etc. may be actuated by its own box or package sensor 128′, 130′, 131′, etc. (shown in phantom), operating its respective pusher 116, 117, 118, etc. via its own control line 132, 133, 134, (shown in phantom) to operate via respectively associated pusher controllers 106, 107, 108, etc., and thus push boxes from conveyor 10, by means of pusher plates 125, 126, 127, 128, 130, 131, 132 and 133 onto a respectively associated

[0043] With reference to FIG. 6, it will thus be seen that boxes or other packages being delivered from the receiver conveyor lines 136, 137, 138, 140, 141, 142, 143 and 144, will be transferred to respective pallet stations 155, 156, 157, 158, 160, 161, 162 and 163 via appropriate transfer mechanisms 146, 147, 148, 150, 151, 152, 153 and 154, respectively.

[0044] With reference to FIG. 7, a typical pallet station 155 is illustrated, wherein a pallet 159 is carried on a rotatable pallet plate 164, which in turn is shaft-mounted at 166, onto a floor-mounted pallet rotator mechanism 165, with the boxes “B” being stacked onto the pallet 159, in some manner such as that shown, with each of the boxes carrying an encoded tag 78, as described above.

[0045] It will be understood that the particular pallet station 155 as shown in FIG. 7, while being described as being a rotatable pallet station, could, if desired, be a fixed pallet station. However, in some instances it will be convenient to use a rotatable pallet station as shown in FIG. 7, especially if a full pallet load is to be wrapped to secure the boxes “B” on the pallet 159.

[0046] In a situation where the boxes “B” are to be wrapped as shown in FIG. 7, a roll 167 of wrapping material, such as a transparent shrink wrap, if desired, may be rotationally carried on a vertically disposed post 168, such that, when the pallet rotating mechanism 165 is actuated to rotate the pallet plate 164 and the pallet 159 carried thereon, the pallet load of boxes “B”, will rotate, and a web of wrapping material, such as for example, a shrink wrap 169 may be wrapped around the pallet load of boxes “B”, for delivery to a warehouse, for storage or the like.

[0047] In the event that the application of a tag 78, by means of the applicator system or mechanism 65 should fail, such that if a given box “B” does not properly receive a tag 78, it would not be desirable for a box “B” to be placed onto a pallet. To this end, the sensors, such as those 128′, 130′, 131′, etc. can recognize that a given box “B” either contains no tag 78, or that the tag 78 is not properly carried by the box “B”, and the sensors 128′, 130′, 131′, etc. would not actuate the pusher mechanisms 116, 117, 118, etc. and such a box “B” with an inactive tag or improperly applied tag, or no tag at all, would be allowed to continue to pass along the conveyor 10, without being discharged therefrom to one or more of the receiver conveyor lines described above, such that it does not become stacked on a pallet.

[0048] Alternatively, the computer 22, itself, at the time that it is controlling the encoded information onto a tag 78 as shown in FIG. 4A, may recognize that a tag is not properly installed, or has not been properly activated, and the computer 22 can thus be programmed not to activate any of the controllers 106, 107, 108, 110, 111, 112, 113, or 114, so that a box “B” without a properly activated tag 78 will not be discharged from the conveyor 10, onto one of the receiver conveyor lines and will not therefor be delivered to a pallet station.

[0049] It will be apparent from the foregoing that various modifications may be made in the details of construction as well as in the use and operation of this invention, within the spirit and scope of the appended claims. For example, the tags 78 that are carried on the tape 68, after being removed from the tape 68 via the doctor blade 79, will stick onto a box “B”, by means of adhesive present on the box-facing surface of the tag 78, such as by a pressure sensitive adhesive.

[0050] It will also be apparent that in accordance with this invention, the tagging of boxes “B” is being done just prior to the pallet stations, although such can be done, if desired, at an “upstream” location in production, such as earlier along a production line, rather than at the pallet station.

[0051] Additionally, it will be understood that in some cases the boxes “B”, may be provided with their chips and antennae already embedded in the boxes, or on the boxes, either in the form of a tag, or in some other form, thereby bypassing the tag applicator system 65 in accordance with this invention. It will also be understood that the boxes “B”, as shown in FIG. 4 can have the tags applied thereto, either while the boxes are still moving along the conveyor, or the conveyor 10 can be momentarily stopped depending upon the programming of the computer 22 actuated through the applicator system 65 upon detection of a box “B” by the position sensor 85, for application of the tags 78, as may be desired.