Sheet media package having radio-frequency identification transponder

Abstract

Sheet media package system includes a cartridge or other packaging for containing a plurality of sheet media; and a radio-frequency identification transponder which stores relevant digital data associated with the cartridge or other packaging.

Description

FIELD OF THE INVENTION

This invention relates in general to sheet media systems and more particularly to a cartridge or other packaging containing sheet media for use in such sheet media imaging systems, the cartridge or other packaging having a radio-frequency identification transponder associated with it.

BACKGROUND OF THE INVENTION

Sheet media imaging systems include laser imaging systems which produce medical images on photosensitive sheet film from digital medical images generated by diagnostic imaging systems (MRI, CT, US, PET), computed radiography systems, medical image digitizers, digital or analog medical image archives, direct digital radiography or the like. The sheet film can be packaged in optically opaque packaging which is removed under dark room conditions and loaded into a film supply of a laser imager. Dark room film loading is eliminated by the resealable film cartridge disclosed in U.S. Pat. No. 5,473,400, issued Dec. 5, 1995, inventors Lemberger et al. The disclosed cartridge allows for daylight loading and can be reused and removed from the laser imager. U.S. Pat. No. 5,229,585, issued Jul. 20, 1993, inventors Lemberger et al., discloses a bar code system which uses this resealable cartridge to control a laser imaging system. The cartridge has attached to it an optical bar code with a unique cartridge ID, film size, film type information and film sensitometric information. The laser imager has a bar code scanner which reads information from the bar code as the cartridge is opened. An imager management system controls the laser imager as a function of the input data and the information read from the bar code. A film processor develops the film as a function of film type information read from the bar code. The laser imager stores information relating to film usage of the cartridge.

Although the optical bar code system disclosed in the latter two patents is useful for the purposes for which they were intended, certain limitations are inherent in this technology as follows.

1. The optical bar code has a limited data storage capability.

2. There are a limited number of unique bar codes.

3. The data is fixed and cannot be changed.

4. The bar code must be located on the outside of the cartridge to allow scanning, exposing the bar code to wear and dirt which result in bar code read failures.

5. Film usage information is stored in the image management system of the laser imaging system.

Other technologies for encoding data on a cartridge are also limited. Thus, magnetic encodement allows data to be changed but requires precise contact between a magnetic layer on the cartridge and a magnetic head. Electrical contact with a memory chip mounted on a cartridge also requires precise positioning of the cartridge relative to the read/write device. Both technologies are complex and expensive and are susceptible to wear and degradation.

U.S. Pat. No. 5,428,659, issued Jun. 27, 1995, inventors Renner et al. discloses a device for transferring electrical signals and electric energy to the memory device of a cassette by radio frequency signals by means of a capacitive coupling device. Although the disclosed device is useful for the purpose for which it was intended, it requires precise positioning of the cassette for transfer of data and direct contact between the cartridge and the cartridge receiver.

There is thus a need for a sheet media system which uses sheet media packaging having encoded data which has a large data storage, which allow s reading of and writing to the data storage, which is resistant to degradation due to dirt, wear and tear, and which is simple and economical to implement.

SUMMARY OF THE INVENTION

According to the present invention, there is provided a solution to the needs discussed above.

According to a feature of the present invention, there is provided a sheet media system comprising, packaging which can be communicated with, with or without physical contact with the transponder, and which stores relevant digital data for holding a plurality of sheet media and a radio-frequency identification transponder associated with said cartridge.

According to another feature of the present invention. there is provided a reusable cartridge for holding a plurality of sheet media and a radio-frequency identification transponder associated with said cartridge.

ADVANTAGEOUS EFFECT OF THE INVENTION

The invention has the following advantages.

1. Sheet media packaging is provided having large encoded data storage.

2. The encoded data storage can be read and written to.

3. Encoded data can be read or written quickly.

4. The RFID system is resistant to degradation due to dirt, wear and tear.

5. The RFID system is simple and economical to implement.

6. The RFID system encodes film usage as well as initial film count.

7. The RFID system can encode information on recycling of the cartridge such as number of times cartridge is recycled, time from last recycling, to prevent had cartridge from being reused.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a laser imager which uses the present invention.

FIGS. 2 and 3 are respectively plan and side elevational views of a resealable cartridge incorporating the present invention.

FIG. 4 is a perspective view of an embodiment of the present invention.

FIG. 5 is a diagrammatic view of a transponder, which can be used in the present invention.

FIGS. 6-8 are diagrammatic views of other embodiments of the present invention.

FIGS. 9-11 are perspective views of a cartridge receiving base with transceiver according to an aspect of the invention.

FIG. 12 is a block diagram of a cartridge/film manufacturing process.

FIG. 13 is a general block diagram of a radiographic laser imager,

FIGS. 14 and 15 are diagrammatic views of other embodiments of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a sheet media imaging system such as digital imager 10 which is configured to operate with a resealable photographic film cartridge 12 . In the embodiment shown, laser imager 10 includes a cartridge-receiving base 16 into which film cartridge 12 with film sheets 14 is loaded. A cartridge opening,closing mechanism 18 is mounted to base 16 . Film cartridge 12 is loaded into base 16 , and sealed within a light-tight compartment. Opening/closing mechanism 18 then opens cartridge 12 to permit access to film sheets 14 in cartridge 12 . Sheets 14 are removed from the opened cartridge 12 and transported to other subsystems of imager 10 (as described below).

Opening closing mechanism 18 is also actuated to close cartridge 12 before the cartridge is removed from imager 10 . Since cartridge 12 is resealable, it can be removed from imager 10 before all the film within the cartridge has been exposed. Cartridges 12 with different sizes or types of film media can therefore be conveniently loaded into and removed from laser imager 10 as needed, without wasting and unused film remaining Within the cartridge.

As shown, imager 10 includes an optical scanning module 208 , electronics module 210 , and integrated thermal processor 310 enclosed in enclosure 201 .

Film sheet 14 is transported out of cartridge by suction feed mechanism 228 , fed into staging area 230 where sheet 14 is transported by bidirectional film staging mechanism 232 into optical scanning module 208 .

Module 208 is mounted onto optical frame 240 , for aligning and holding film sheet 14 during the image scanning process. Optical frame 240 is constructed from a rolled sheet metal which is welded to a box-shaped housing. Film sheet 14 transported onto cylindrical film platen 244 where it is scanned.

Film alignment devices 248 . align film sheet 14 on platen 244 . Once the scanning of the image is complete then exposed film sheet 14 is transported out of film platen 244 toward bidirectional film staging mechanism 232 for transportation of exposed film sheet 14 to thermal processor 310 . Bidirectional film staging mechanism 232 includes a set of three rollers 238 234 , and 236 where center roller 234 is driven and rollers 238 , 236 are idlers. Film staging mechanism 232 is designed such that exposed film sheet 14 can be transported out of film platen 244 between rollers 234 and 236 while simultaneously transporting unexposed film sheet 14 onto film platen 244 between rollers 234 and 238 , if desired.

Electronics module 210 includes imager control s)stems. The operator can interface with the electronics through either a keypad mounted on a console, a portable keypad or a modem.

The imager control system receives information from densitometer 264 reads and compares optical density information from an optical density patch generated during the scanning process having a predetermined target optical density on the trailing edge of developed film sheet 14 . If necessary, the exposure is adjusted to compensate for any minor differences in optical density.

Enclosure 201 is divided into two primary chambers, upper chamber 202 and lower chamber 204 , with a passage for transporting film sheet 14 between the two chambers. Thermal processor 310 is preferably located in upper chamber 202 . Lower chamber 204 containing optical scanning module 208 . electronics module 210 . and power supply 211 and is kept at a positive pressure with respect to upper chamber 202 to prevent damage of the optics due to volatile materials outgassed from film sheet 14 during thermal processing and to protect optical scanning module 208 from detrimental temperature increases. Thermal processor 310 includes rotatable heated member 314 and guiding members 316 for heat development of exposed film sheet 14 .

Enclosure 201 can include an openable cover 266 . For example. openable cover 266 can be pivotally connected to the remainder of enclosure 201 . Guiding members 316 can be attached to cover 266 so that when cover 266 is opened, guiding members 316 are lifted away from heated member 314 providing easier access to heated member 314 . After processing, developed film sheet 14 is cooled and deposited in output tray 280 .

Resealable cartridge 12 can be described in greater detail with reference to FIGS. 2 and 3 . As shown, cartridge 12 includes a optically opaque polymer film-receiving tray 20 and flexible, optically opaque polymer cover 22 . Cover 22 is resealably mounted to tray 20 by adhesive coating 24 A- 24 D. Other resealing techniques can be used such as magnetic strips. Tray 20 is preferably molded in one piece from a polymeric material.

Tray 20 is a relatively shallow member and includes a generally planar bottom wall 26 , front wall 28 A. rear wall 28 B and side walls 28 C and 28 D. Lips 30 A- 30 D extend outwardly from the upper edges of respective walls 28 A- 28 D, and circumscribe a film access opening of tray 20 . Inwardly projecting guides 32 are formed on walls 28 A- 28 D to properly position sheets of film (not shown) within tray 20 . Feet 34 A- 34 D are formed into and extend downwardly from bottom wall 26 to support cartridge 12 within base 16 of laser imager 10 . Bottom wall 26 also includes positioning recesses 36 which are tapered and extend into tray 20 from the bottom wall. Positioning recesses 36 are configured to receive positioning lugs extending from base 16 . The positioning lugs secure and properly orient cartridge 12 within laser imager 10 . In the embodiment shown, positioning recesses 36 are molded into feet 34 A and 34 B adjacent to front wall 28 A. A media presence monitoring well 35 is also formed in bottom wall 26 . Media presence monitoring sensors of imager 10 (not shown) extend into well 35 below the surface of bottom wall 26 when all film has been removed from tray 20 .

Feet 34 A and 34 B (i.e., those adjacent to front wall 28 A) also include ramp surfaces 38 which slope downwardly from the lower edge of the front wall to the bottom of the feet.

Ramp surfaces 38 guide feet 34 A and 34 B over the positioning lugs in imager base 16 as cartridge 12 is being loaded into the base. The embodiment of tray 20 illustrated in FIGS. 2 and 3 also includes a recess 40 in bottom wall 26 which forms a platform on the bottom exterior of tray 20 . A pair of feet 41 are formed as releases in bottom wall 26 adjacent recess 40 . Reinforcing ribs (not shown in FIGS. 2 and 3 ) can also be molded into bottom wall 26 and/or side walls 28 A- 28 D to increase the rigidity of tray 20 .

The forwardmost or leading edge of front lip 30 A also includes a series of spaced cut-out sections 42 . Cut-out sections 42 form a series of spaced projections 44 on the leading edge of lip 30 A. Cut-out sections 42 and projections 44 cooperate with yet to be described aspects of cover 22 and opening/closing mechanism 18 to facilitate the opening and subsequent closing of cartridge 12 .

Cover 22 is a flexible, photo-inert and optically opaque sheet of material sized to extend over the access opening of tray 20 . Cover 22 has edges 23 A- 23 D (only edges 23 A and 23 D are shown in FIG. 2 ) which extend between and mate with tray lips 30 A- 30 D. respectively.

The front edge 23 A of cover 22 extends over the tray cut-out sections 42 , and includes elongated apertures 46 which are positioned over the cut-out sections when the cover is sealed onto tray 20 . Apertures 46 facilitate the engagement of opening closing mechanism 18 with cover 22 in a manner described below.

Cartridge 12 is provided with a stack of photosensitive sheet media, such as unexposed radiographic film used in laser imagers. The film may be processable by conventional wet processing techniques or by thermographic dry processing techniques. According to the present invention cartridge 12 has a radio frequency identification (RFID) transponder associated with it. As shown in FIG. 4 , an inlay transponder 50 is mounted on the bottom of liner 52 facing the bottom wall of cartridge 12 .

Radio-frequency identification transponders are widely available in a variety of forms. Inlay transponders have a substantially flat shape. FIG. 5 shows an inlay transponder 50 having a flexible support sheet 54 carrying a planar flat coil antenna 56 and integrated circuit chip 58 having a non-volatile digital memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory). Stored in non-volatile memory are relevant encoded digital data. Sheet 54 is electrically insulating plastic and antenna 56 is a layer of conductive material deposited on sheet 54 . Connectors 59 and necessary insulation are provided as deposited layers. Inlay transponders of this type are marketed by Texas Instrument Inc., Dallas, Tex. as Tag-it™ inlays. Transponders supplied from other sources may also be used. The transponder is interrogated by an RF signal from an external transceiver which is not in contact with the transponder and may be some distance from it. The transponder has a unique ID code which is transmitted to the transceiver upon interrogation. Data can be both written to and read from the non-volatile memory. In this embodiment other transponder configurations can be used in place thereof For example, the transponder can be cylindrical.

The transponder associated with cartridge 12 can be mounted in other areas thereof. FIG. 6 shows transponder 50 mounted on upper sheet 22 . FIG. 7 shows transponder 50 mounted on the side of cartridge 12 . FIG. 8 shows transponder 50 mounted on the outside surface of cartridge 12 can also be mounted on the inside surface of the bottom of the cartridge 12 . It will be understood that transponder 50 can be mounted on cartridge 12 in any convenient area on the inside or outside thereof. Alternatively, the transponder can be an integral part of the cartridge.

Referring now to FIGS. 9-11 . there is shown cartridge receiving base 16 and opening and closing mechanism 18 . Base 16 is mounted in imager 10 (FIG. 1 ). Base 16 has a bottom member 70 side members 72 , 74 , rear member 76 , and front member 78 . Lugs 80 , 82 engage recess 36 of cartridge 12 to position cartridge 12 in base 16 . Opening/closing mechanism 18 has a unit 84 which engages the apertures 46 of cover 22 to roll it back for removal of film sheets from cartridge 12 . Mechanism 18 rides in tracks 86 , 88 . The operation of mechanism 18 is described in greater detail in U.S. Pat. No. 5,132,724, issued Jul. 21, 1992, inventors Lemberger et al., the contents of which are incorporated herein by reference and will not be repeated here.

The transceiver for communicating with transponder 50 includes an antenna 90 and read/write electronics 92 electrically connected to antenna 90 . Antenna 90 is located in proximity to transponder 50 when cartridge 12 is positioned in base.

FIG. 12 is a block diagram of an exemplary manufacturing process for making film cartridge 12 . As shown, process A produces a wide web film base which is coated in process B to produce unexposed film. A large roll of wide film is then slit into narrower strips which are cut into sheets (process C). A five sided cartridge with an open top is molded in process D and adhesive added to the upper edges of the cartridge. A liner with transponder is inserted into the bottom of the cartridge and a resealable cover is applied in process E. In process F. the cartridge is opened and a stack of film sheets is inserted into the cartridge on top of the insert. In process G, the resealable cover is closed. In process H, one or more film or cartridge processes or other relevant digital data are stored in the transponder.

Referring to FIG. 13 , there is shown a block diagram of imager 10 . A film cartridge 400 containing unexposed radiographic film and having a transponder 402 is loaded into imager 10 . RFID transponder 402 is interrogated by RFID transceiver 404 under the control of control system 406 . Cartridge/Film Handling system 408 , opens the film cartridge, removes a sheet of film, and transports it to Film Exposure Station 410 . Image Source 412 , such as a digital radiographic image storage. transmits an image to be reproduced to Image Processor 414 , where the image can be processed for various parameters including ones which have been derived from data supplied by RFID transponder 402 . Such data can include film size, film sensitometry, film age, etc. The processed image is reproduced by Laser Scanner 416 on a film sheet located at Film Exposure Station 410 . The exposed film is then processed by Film Processor 418 which can be a wet process film processor or a dry film processor. An exemplary laser imager for use with heat processable dry film is described in U.S. Pat. No. 6,007,971, issued Dec. 28, 1999, inventors Star et al.

According to the invention the cartridge transponder can store one or more of the following types of relevant digital data, among others.

1. Unique transponder ID number

2. Cartridge ID number

3. Film type, lot number, all manufacturing machines or processes that film saw (e.g., those associated with processes A, B, and C of FIG. 12 ).

4. Film expiration date

5. Film size and initial number of film sheets in cartridge

6. All manufacturing machines or processes that cartridge saw (e.g those associated with processes D, E, F, G of FIG. 12 )

7. Messages for customers, sales or service

8. Upgrade software for the laser imager According to a further feature of the invention, the laser imager transceiver can transmit one or more of the following types of data to the film cartridge transponder after installation in the laser imager.

1. Number of film sheets remaining in the cartridge.

2. Any measured laser imager parameter such as film calibration, image processing look up tables, motor speeds, temperature, errors, transfer functions, laser imager ID number, imager film usage, density patch tracking for Automatic Image Quality Control.

3. Any information relating to recycling of the cartridge such as: number of times recycled, date of recycling, time from last recycle, error codes that can prevent cartridge from being reused.

4. Laser imager failures, such as: sheet film jams, optic failure, communication problems, recalibration.

5. Times to scheduled service, preventive maintenance, error fix. film supply.

6. Codes to facilitate auditing of film, cartridge, customer, imager.

Although the present invention is described as associated with a cartridge containing sheet media, it will be understood that the RFID transponder can be used with other types of sheet media packaging, such as the flexible packaging disclosed in U.S. Pat. No. 5,973,768, issued Oct. 26, 1999, inventors Mazion et al., the contents of which are incorporated herein by reference.

As shown in FIG. 14 , flexible packaging 4000 includes a light tight enclosure for a stack of light sensitive media sheets 4020 . Packaging 4000 is made of a bag having sides 4040 , 4060 , rolled up end 4080 secured by tape 4100 and tapered end 4120 . Packaging 4000 can be inserted in a light tight sheet media supply in a laser printer and removed in the printer by mechanical means to leave the stack of media sheets 4020 in the printer supply. (Reference is made to U.S. Pat. No. 5,765,091, issued Jun. 9, 1998, inventors Kovach et al., for an exemplary apparatus in which the packaging 4000 may be used).

According to a feature of the present invention, RFID transponder 4140 is associated with packaging 4000 . Transponder 4140 stores relevant digital data as further explained above. The apparatus utilizing packaging 4000 includes a transceiver for communicating with the transponder associated with the packaging as further explained above.

Instead of associating the RFID transponder with a sheet media cartridge of other packaging containing the sheet media. another feature of the present invention illustrated in FIG. 15 . involves placing a removable transponder in apparatus utilizing sheet media, in proximity to a transceiver located in the apparatus. For example, as shown, an insert 500 having transponder 502 associated therewith, is inserted in sheet media supply drawer 504 . Sheet media are stacked on insert 500 in drawer 504 . Drawer 504 is inserted into sheet media utilization apparatus 506 through slot 508 . Apparatus 506 includes transceiver 510 which communicates with transponder 502 . Other techniques for providing transponder 502 will be apparent to those skilled in the art.

It will also be understood that other types of sheet media can be used in association with the transponder of the present invention. Thus, sheet media used in other printing systems such as ink jet, thermal, dye transfer, electrographic, lithographic, ink contact, or the like are considered within the scope of the present invention.

The invention has been described in detail wvith particular reference to certain preferred embodiments thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the invention.

PARTS LIST

10 digital imager

12 film cartridge

14 sheet film

16 cartridge-receiving base

18 opening/closing mechanism

20 tray

22 polymer cover

23 A- 23 D edges

24 A- 24 D adhesive coating

26 planar bottom walls

28 A- 28 D walls

30 A- 30 D lips

32 guides

34 A- 34 D feet

35 well

36 recess

38 ramp surface

40 recess

41 feet

42 cut-out sections

44 projections

46 apertures

50 transponder

52 liner

54 support sheet

56 coil antenna

58 circuit chip

59 connectors

70 bottom number

72 - 74 side members

76 rear member

78 front member

80 - 82 lugs

84 unit

86 - 88 tracks

90 antenna

92 electronics

110 exposure station

118 film processor

201 enclosure

202 upper chamber

204 lower chamber

208 scanning module

210 electronic module

211 power supply

228 suction fed mechanism

230 staging area

232 film staging mechanism

234 center roller

236 - 238 idler rollers

244 film platen

246 film feed slot

248 film alignment device

264 densitometer

266 tab openable cover

280 output tray

310 thermal processor

314 heated member

316 guide member

402 transponder

404 transceiver

406 control system

408 cartridge film handling system

410 film exposure station

412 image source

414 image processor

416 laser scanner

500 insert

502 transponder

504 drawer

506 apparatus

508 slot

510 transceiver

4000 flexible packaging

4020 media sheets

4040 - 4060 sides

4080 end

4100 tape

4120 end

4140 transponder

Claims

1. Sheet media package system comprising:a light tight cartridge which includes an open tray for holding a plurality of sheet media and a resealable cover closing off said open tray; and a radio-frequency identification transponder disposed on a flexible sheet located at a bottom of said cartridge beneath said plurality of sheet media and which can be communicated with while said sheet media are removed from said tray, with or without physical contact with the transponder, and which stores relevant digital data; and wherein said transponder is disposed inside of said cartridge and remains in said cartridge after removal of all of said sheet media.

2. The system of claim 1 wherein said transponder includes a digital read/write memory and wherein said memory stores digital data representing one or more of the following, cartridge manufacturing history, cartridge recycling data, cartridge error codes.

3. The system of claim 1 wherein said transponder includes digital read/write memory and wherein said memory stores digital data representing one or more of the following, media size, initial number of media sheets in packaging, media type, media lot number, media manufacturing history, media sensitometry, media expiration date.

4. The system of claim 1 wherein said transponder includes a digital read/write memory and wherein said memory stores digital data representing one or more of the following, unique transponder ID number, packaging ID number, messages for customers, sales or service personnel, upgrade software for sheet media system.

5. The system of claim 1 wherein said transponder includes a digital read/write memory and wherein said memory stores digital data representing one or more of the following; number of media sheets remaining;any measure system parameter, including media calibration, image processing look-up tables, motor speeds, temperature, errors, transfer functions, system ID number, media usage, density patch tracking; any information relating to recycling of a media packaging, including, number of times recycled, date of recycling, time from last recycle, error codes that can prevent packaging from being reused; system failures, including media jams, optic failure, communication problems, recalibration; times to schedule service, preventive maintenance, error fix, media supply; and codes to facilitate auditing of media, packaging, customer, media system.