Flap-type portal reader

• US 5,221,831 A
• Filed: 11/29/1991
• Issued: 06/22/1993
• Est. Priority Date: 11/29/1991
• Status: Expired due to Term

• Current Assignee: Assa Abloy AB
• Original Assignee: Indala Corporation (Assa Abloy AB)
• Inventors: Geiszler, Theodore D.
• Primary Examiner(s): Fields, Carolyn E.
• Assistant Examiner(s): Dunn, Drew A.
• Application Number:
  US07/798,713
• Time in Patent Office: 571 Days
• Field of Search: 235/440, 235/439, 235/449, 235/443, 235/385, 340/572, 340/825.54, 340/825.35
• US Class Current: 235/440
• CPC Class Codes: B65G 47/50 according to destination signals stored in separate systems
• CPC Class Codes: G01S 13/825 with exchange of information between interrogator and responder
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10326 the antenna being of the very-near field type, e.g. capacitive
• CPC Class Codes: G06K 7/10336 the antenna being of the near field type, inductive coil
• CPC Class Codes: G06K 7/10425 the interrogation device being arranged for interrogation of record carriers passing by the interrogation device
• CPC Class Codes: G06K 7/10435 the interrogation device being positioned close to a conveyor belt or the like on which moving record carriers are passing conveying in accordance with bodily destination marks, see B65G47/46, sorting of objects carrying identity markings, see B07C5/34

Abstract

Apparatus for selectively reading or writing data on a magnetic data stripe on a data card which is thin and flexible and for selectively returning or capturing the card. The apparatus includes a card guide arrangement comprising a cylindrical card guide path section, an entrance card path section with an entrance slit for admitting the data card, and an exit path section with an exit slit for discharging the data card for capture. A drive arrangement drives the data card through the entrance slit, throughout the cylindrical card guide path section, and through the exit slit. A transducer with a read head and write head is mounted relative to the cylindrical card guide path section. A position tracking arrangement determines the position of the data card within the cylindrical card guide and a card-in sensor senses the presence of a data card in the entrance path section. A microprocessor based control circuit is used to operate the system and control operational features.

Claims

1. Apparatus for automatically reading a passive transponder type tag, which is responsive to receipt of a magnetic exciting field of a first predetermined frequency to produce at least one of a magnetic and an electrostatic field of a second different predetermined frequency modulated by a digitally coded identifying signal, while the tag is attached to a object moving along a given pathway;

said apparatus comprising;

means for producing a magnetic exciting field of said first predetermined frequency along a portion of the length of the pathway;

a curtain, formed of a plurality of flexible flaps of non-conductive material, suspended from above said portion of said pathway and extending across said pathway, with said plurality of flaps being positioned, and being of a length, such that at least one of said flaps will be contacted and deflected by an object having an attached transponder moving along said pathway;

at least one of an electrostatic field receiving antenna and a magnetic field receiving antenna disposed in each of said flaps; and

means connected to each of said receiving antennas for receiving and decoding a signal of the second predetermined frequency received by the respective said antennas.

3. Apparatus as defined in claim 1 wherein each electrostatic antenna comprises a length of wire extending along the length of a respective flap and connected at its upper end to said means for receiving.

7. Apparatus as defined in claim 1 wherein said flaps are laminated sheets of plastic with the associated said antennas being disposed between the plastic sheets.

2. Apparatus for selectively reading or writing data on a magnetic data stripe on a data card which is thin and flexible, said apparatus comprising:

card guide means defining a card guide path including a cylindrical card guide path section and an entrance card path section including an entrance slit for admitting said data card into said cylindrical card guide path section;

drive means for driving a data card though said entrance slit and around said cylindrical card guide path section;

transducer means, including a read head member and a write head member, positioned at a prearranged location on said cylindrical card guide path section for selectively detecting data or writing data on a least one data track on said data stripe of a data card being driven through said cylindrical card guide path section;

position tracking means for determining the position of said data card within said cylindrical card guide path section;

card-in sensor means for sensing the presence of a data card in said entrance card path section; and

control circuit means coupled to said drive means, said transducer means, said position tracking means and said card-in sensor means and being operative

during a card capture time period to respond to said card-in sensor means to detect the presence of a data card in said entrance card path section to turn on said drive means to drive said data card through said entrance slit and said entrance card path section into said cylindrical card guide path;

during a data scan interval to respond to said position tracking means and said transducer means to alternatively read or write data on said data card;

said entrance slit being a card-in/out slit operative during said card capture time period to admit said data card into said cylindrical card guide path and operative during a card discharge time period to allow discharge of said data card from said cylindrical card guide path;

said card guide means includes a guide claw means having a guide finger portion located at said card-in/out slit and movable between a card in-out position and a card guide position and spring means for biasing said guide finger portion toward said card in-out position, said card in-out position permitting free movement of said data card thorugh said card-in/out slit during both said card capture time period and said card discharge time period; and

said guide finger portion being moved into said card guide position by the leading edge of a data card being driven around said cylindrical card guide path to provide a smooth guided movement of said data card at the position of said card-in/out slit;

said drive means comprising a bidirectional drive means for driving said data card alternatively in a forward direction to drive said data card forwards through said entrance slit and around said cylindrical card guide path thereby to scan said data stripe thereon past said transducer means and in a reverse direction to drive said data card backwards through said entrance slit to discharge said card from said card guide means; and

said control means is operative during said card capture time period to turn on said drive means in a forward direction and during said card discharge time period to turn on said drive means in a reverse direction to discharge said data card through said card-in/out slit.

8. Apparatus as claimed in claim 2, further comprising

punch and die means mounted in a position relative to said card guide means in alignment with said transducer means and being selectively operable to punch a hole in said data card at a location on a data track on said magnetic data stripe thereon;

and said control means is coupled to said punch and die means and is operative during a hole punching time period to operate said drive means to drive said data card to a prearranged data card position based on the output of said position tracking means and thereafter to operate said punch and die means to punch a hole in said data card.

9. Apparatus as claimed in claim 2, wherein

said position tracking means is a tachometer means mounted in a prearranged position relative to said cylindrical card guide path section with a drive wheel positioned to contact one edge portion of said data card being driven therethrough, said tachometer means producing a sequence of output pulses in response to rotation of said drive wheel;

said control circuit means includes a tachometer count register, means for initializing said tachometer count register to a data value corresponding to a card length value comprising substantially the number of output pulses expected from said tachometer means when driven by the entire length of said data card, and means for decrementing the data value in said tachometer count register in response to said output pulses from said tachometer means.

10. Apparatus as claimed in claim 9, further comprising

a punch and die means mounted in a prearranged relationship to said card guide means in alignment with said transducer means for punching a hole in said magnetic data stripe along one data track thereon;

and

and wherein said control means is interfaced to said punch and die means during a hole punching time period and includes

means for setting a punch location count corresponding to the desired position of a hole to be punched by said punch and die means; and

punch control means for operating said drive means to drive said data card forward through said cylindrical card guide path section until the data value in said tachometer count register is equal to said punch location count, stopping said drive means, and then operating said punch and die means to punch a hole in said data card at a position corresponding to said punch location count.

11. Apparatus as claimed in claim 10, adapted for use with a prepaid card type of data card which includes a value data track located on one magnetic strip on a back side of said data card, said value data track carrying data corresponding to the current value of said data card and having on a front side of said data card a visually readable value indicating gage substantially aligned with said value data track, said transducer means having a read/write magnetic head positioned to read and write data on said value track,

said control circuit means being operative

during a value track reading time period to process the output of read element on said read/write magnetic head to read the current value data on said value data track and to detect the position of any holes previously placed therein;

during a value track validating time period to check the correlation between said current value data read from said value data track and the position of an extreme one of said detected holes to determine if said current value data is valid;

during a value track writing time period to write a sequence of ZERO data values on said value data track until the data value in said tachometer counter register indicates that said data card has been driven to a position that the hole value region of said data card has bee scanned past said read/write head and thereafter operating said write element on said read/write magnetic head to write value data bits on said value data track using the data values in said tachometer count register to accurately control the effective data bit signal length on said value data track;

during said hole punching time period to decide whether said new value data written on said value data track requires the punching of a hole at a new location on said value indicating gage, and if a new hole is required to set said punch location count corresponding to the required location for said new hole.

12. Apparatus as claimed in claim 11, adapted for selectively swallowing said data card, and wherein

said card-in/out slit is located at an upper portion of said cylindrical card guide path section;

said card guide means further defines a card swallow path section including a card swallow slit located at a position on said cylindrical card guide path section separated from said entrance slit;

and said card guide means further includes;

a read capture claw means having a guide finger portion located at said card swallow slit and movable between a card capture position and a card swallow position;

spring biasing means for biasing said guide finger portion of said read capture claim means toward said card swallow position; and

actuator means for selectively moving said guide finger portion of said read capture claw means to said card capture position thereby to capture said data card in said cylindrical card guide path section and to smoothly guide said captured data card at the location of said card swallow slit;

said control means being additionally coupled to said actuator means and being

further operative during said card capture time period to respond to said card-in sensor means to turn on said actuator means to position said read capture claw means in said card capture position prior to operating said drive means in a forward direction to drive said data card into said cylindrical card guide path section; and

operative during a card swallow time period to turn off said actuator means thereby to return said read capture claw means to said card swallow position and to operate said drive means in a forward direction to drive said data card through said card swallow slit;

said control means invoking said card swallow time period during said value track validating time period when said current value data read from said value data track does not correlate with the position of said extreme one of said detected holes so that said invalid data card will thereafter be swallowed.

13. Apparatus as defined in claim 9 wherein said means for producing a magnetic field includes a separate oscillator operating at said first predetermined frequency connected to each of said four exciting coils whereby the produced magnetic exciting fields are asynchronous.

4. Apparatus for selectively reading or writing data on a magnetic data stripe on a data card which is thin and flexible, said apparatus comprising:

card guide means defining a card guide path including a cylindrical card guide path section and an entrance card path section including an entrance slit for admitting said data card into said cylindrical card guide path section;

drive means for driving a data card through said entrance slit and around said cylindrical card guide path section;

transducer means, including a read head member and a write head member, positioned at a prearranged location on said cylindrical card guide path section for selectively detecting data or writing data on a least one data track on said data stripe of a data card being driven through said cylindrical card guide path section;

position tracking means for determining the position of said data card within said cylindrical card guide path section;

card-in sensor means for sensing the presence of a data card in said entrance card path section; and

control circuit means coupled to said drive means, said transducer means, said position tracking means and said card-in sensor means and being operative

during a card capture time period to respond to said card-in sensor means to detect the presence of a data card in said entrance card path section to turn on said drive means to drive said data card through said entrance slit and said entrance card path section into said cylindrical card guide path;

during a data scan interval to respond to said position tracking means and said transducer means to alternatively read or write data on said data card;

said apparatus further comprising;

punch and die means mounted in a position relative to said card guide means in alignment with said transducer means and being selectively operable to punch a hole in said data card at a location on a data track on said magnetic data stripe thereon;

and said control means is coupled to said punch and die means and is operative during a hole punching time period to operate said drive means to drive said data card to a prearranged data card position based on the output of said position tracking means and thereafter to operate said punch and die means to punch a hole in said data card.

5. Apparatus as defined in claim 4 wherein:

said transponder type device simultaneously produces both a magnetic field and an electrostatic field modulated with the coded signal;

at least some of said flaps contain both a magnetic field receiving antenna and an electrostatic field receiving antenna; and

said electrostatic field receiving antenna is a length of wire extending along the length of the associated flap.

6. Apparatus as defined in claim 5 wherein at least some of said flaps further include an excitor coil for said means for producing a magnetic field of said first predetermined frequency.

14. A portal for automatically exciting and reading a passive transponder type tag, which is excited by an inductively coupled signal of a first predetermined frequency and which simultaneously produces a magnetic field and an electrostatic field modulated with a digitally coded identifying signal, while the device is moving along a substantially horizontal conveyor belt, said portal comprising:

a rectangular frame for placement around a portion of a substantially horizontal conveyor belt in a direction transverse to the direction of movement of the conveyor belt;

means for producing a magnetic field of said first predetermined frequency within the interior of said frame said means including first, second, third and fourth exciter coils mounted respectively on an upper, a lower and respective side panels forming the walls of said frame, and oscillator and driver circuit means, connected to each of said exciter coils, for producing a signal of said first predetermined frequency;

a curtain, formed of a plurality of spaced flexible rectangular flaps of non-conductive material suspended from said upper panel disposed within said frame, extending in a direction transverse to the direction of movement of the conveyor belt, and being of a length such that at least one of said flaps will be contacted and deflected by an object moving along the conveyor belt;

a pickup coil, serving as a magnetic field receiving antenna, and an electrostatic field receiving antenna disposed in each of said flaps;

and receiver means, connected to each of said pickup coils and of said electrostatic field receiving antennas, for detecting a coded signal of the second frequency received by any of said pickup coils and electrostatic receiving antennas.

15. A portal according to claim 14 further comprising a respective further pickup coil serving as a magnetic field receiving antenna disposed on each of said panels of said frame adjacent respective said exciter coils, with the axes of said further pickup coils being orthogonal to the axes of said pickup coil in said flaps.

16. A portal according to claim 15 wherein said pickup coil in said flaps are disposed near the center of the length of said flaps.

17. A portal according to claim 15 wherein each of said electrostatic receiving antennas is a length of wire extending along the length of a respective flap.

18. A portal according to claim 17 wherein each said flap contains two of said electrostatic antennas which extend along the length of the respective flap adjacent the respective longitudinal edges of a respective flap.

19. A portal according to claim 15 further comprising a respective further exciter coil disposed in each flap adjacent the lower end of the respective flap and oriented orthogonal to said first, second, third and fourth exciter coils, and wherein each said further exciter coil is connected to said oscillator and driver circuit means.

20. A portal according to claim 19 wherein said oscillator and driver circuit means includes a respective separate oscillator and driver circuit for at least each of said first, second, third and fourth exciter coils, whereby at least said first, second, third and fourth exciter coils are asynchronously driven.

21. A portal according to claim 19 wherein said pickup coil in each of said flaps is disposed near the center of the length of each flap;

and further comprising another magnetic field pickup coil disposed in each flap within and concentric with the adjacent said further exciter coil, and connected in parallel with the associated said pickup coil in a respective flap.

22. A portal according to claim 15 wherein said first, second, third and fourth exciter coils are flat loop coils, with the two of said pickup coils on said side panels being oriented parallel to one another and orthogonal to the two of said pickup coils on said top and bottom surfaces which are likewise parallel to one another.

23. A portal according to claim 21 wherein each of said pickup coils mounted on said panels of said frame is concentric with and disposed within the adjacent one of said exciter coils.

24. A portal according to claim 14 wherein said oscillator and driver circuit means includes a respective separate oscillator and driver circuit for each of said first, second, third and fourth exciter coils.

25. A portal according to claim 15 wherein said means for receiving and decoding includes a separate receiver connected to each of said pickup coils.

26. A portal according to claim 25 wherein:

said curtain contains four of said flaps, and wherein said means for receiving and decoding includes a respective separate receiver connected to said electrostatic antennas of the two inner of said flaps and to said electrostatic antennas of the two outer of said flaps.

27. A portal according to claim 15 further comprising a pre-reader comprising a rectangular panel containing a fifth exciter coil and a further magnetic field pickup coil disposed in front of said frame in the direction of travel of the conveyor belt and with said rectangular panel being positioned so that it is substantially coplanar and parallel to said lower panel of said frame;

said fifth exciter coil being an elongated loop coil extending in a direction transverse to the direction of travel of the conveyor belt and of a width in the direction of travel of the conveyor belt to produce a magnetic field transverse to the direction of conveyor belt travel which is narrow relative to the magnetic fields produced by said first, second, third and fourth exciting coils;

an oscillator producing a signal of said first predetermined frequency connected to said fifth exciter coil via a driver circuit; and

a separate receiver means connected to said further pickup coil for detecting a coded signal of said second predetermined frequency received by said further pickup coil.