GB2355432A - Device for wireless transfer of signals between a control system of a printing press and a mobile computer unit - Google Patents
Device for wireless transfer of signals between a control system of a printing press and a mobile computer unit Download PDFInfo
- Publication number
- GB2355432A GB2355432A GB0025808A GB0025808A GB2355432A GB 2355432 A GB2355432 A GB 2355432A GB 0025808 A GB0025808 A GB 0025808A GB 0025808 A GB0025808 A GB 0025808A GB 2355432 A GB2355432 A GB 2355432A
- Authority
- GB
- United Kingdom
- Prior art keywords
- unit
- interface
- mobile computer
- functional
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0009—Central control units
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/387—Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/38—Universal adapter
- G06F2213/3814—Wireless link with a computer system port
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
The invention relates to a device for the wireless transfer of signals between the control system of a printing press (1), particularly an offset sheet printing press, and a mobile computer unit (10). The control system of the printing press consists of several control units (7) and each control unit (7) is constructed for the control and/or monitoring of the functional sequence of a functional unit (2-6) of the press (1). For wireless bi-directional data transfer between each control unit (7) and the mobile computer unit (10), the functional units (2-6) have an interface (8) connected with the control unit (7) and the mobile computer unit (10) has an interface (12). To enable wireless transfer of signals between the interfaces (8, 12), these can be directed towards one another. To guarantee an intact signal transfer path between functional unit (2-6) and diagnostic computer (10) and simultaneously a high mobility of the diagnostic computer, each interface (8, 12) consists of a transmission and a receiving unit (11, 16) for the signals to be exchanged in wireless fashion and interface electronics (15, 22), and at least the transmitting and receiving unit (11, 16) of at least one of the interfaces (8, 12) is arranged spatially separated from the respective functional unit (2-6) and/or the mobile computer unit (10).
Description
I I: I 2355432 DEVICE FOR WIRELESS TRANSFER OF SIGNALS BETWEEN A CONTROL
SYSTEM OF A PRINTING PRESS AND A MOBILE COMPUTER UNIT 5 This invention relates to a device for wireless transfer of signals between a control system of a printing press, particularly an offset sheet printing press, and a mobile computer unit, wherein the control system of the press consists of several control units and each control unit is constructed for the control and/or the monitoring of the functional sequence of a functional unit of the printing press and has an interface for the wireless bi-directional data transfer between each control unit and the mobile computer unit as well as the functional units connected with the control unit and also the mobile computer unit has an interface, wherein, for effecting a wireless transfer of the signals between the functional unit interfaces and the interface of the mobile computer unit, these can be directed towards one another.
From DE 297 16 311 U1, a maintenance arrangement on a printing press is known. The printing press has several functional units wherein each functional unit is controlled by its own control unit. For service and diagnostic purposes, the individual control units of the functional units of the printing press are connected with a transportable diagnostic computer via infrared interfaces, which are arranged both on the functional unit of the printing press and also on the maintenance computer. The maintenance computer acquires the press data necessary for error diagnosis and transmits test data and diagnostic programmes to the control unit of the respective functional unit.
In order to guarantee an error-free data exchange, obstructions should not be able to disturb the transfer channel formed by the infrared interface of the functional unit and the infrared interface of the maintenance unit.
In order to guarantee low disruptive radiation with simultaneously high transfer security, the data transfer channels are constructed with the aid in each case of a sending and receiving unit so that these sending and receiving units are directed towards one another within a specified radiation angle. -The necessary direct line of sight connection between functional unit and diagnostic computer is, however, destroyed in the case of those service units which, for a complete diagnosis, require simultaneously observation at the place of the occurrence (e.g. within a switching box or between two printing towers) and the relevant data indicated on the diagnostic computer. The constructional considerations, in this connection, shield off the data transfer path.
The invention accordingly seeks to provide a device which guarantees at all times an intact transfer path between functional unit and diagnostic computer and simultaneously high mobility of the diagnostic computer.
According to the present invention, there is provided a device for wireless transfer of signals between a control system forming part of a printing press and a mobile computer unit, wherein the control system of the printing press consists of several control units and each control unit is constructed for the control and/or monitoring of the functional sequence of a functional unit of the printing press and which has for wireless bi- directional data transfer between each control unit and the mobile computer unit, an interface connected with the control unit, wherein the mobile computer unit has an interface, and wherein, for effecting the wireless transfer of the signals between the two interfaces, these can be directed towards one another, wherein each functional unit interface and the interface of the mobile computer unit consists of a transmitter and a receiving unit for the signals which are to be exchanged wirelessly and an interface electronics, at least the transmitting and receiving units of at least one of the functional unit interfaces and/or of the interface of the mobile computer unit being arranged spatially separated from the corresponding functional units and/or the mobile computer unit.
The advantage of the device of the invention consists in that the tying down to a specific location of known units is overcome. Thus, maintenance activity or fault diagnosis on the printing press can be carried out at any location desired. Because of the flexible arrangement of the transmitting and receiving units, a spatial change of the transmission path is possible according to choice, whereby the advantages of little disruptive radiation and a high transfer security remain guaranteed. Also a simultaneous observation of the diagnostic computer and of the printing press is possible on the spot.
In one embodiment, the transmitting and receiving unit connected with the control unit of the functional unit interface is constructed spatially alterable and connected by means of an electrical connection with the control unit arranged stationary in or on the functional unit. In this connection, the transmitting and receiving unit mounted on the functional unit can be arranged in a mounting and, if necessary, can be removed from this and fixed to any other place desired on the functional unit. With a corresponding arrangement of the length of the electrical connection, arrangement on a neighbouring functional unit is also conceivable if any particular case makes this necessary or more convenient.
In order to facilitate the external fixing to any desired place, the transmitting and receiving unit is constructed so that self-adhesively on the functional unit, e.g. by the use of suitable adhesive means, clips, burrs, fastenings or the like.
In a further embodiment, the transmitting and receiving unit of the transportable computer unit is arranged lying opposite the sending and transmitting unit of the functional unit interface fixed unalterably on the functional unit, wherein the sending and receiving unit and the interface electronics of the mobile computer unit are fixed to the functional unit and connected via an electrical connection with the mobile computer unit.
The interface electronics, in this connection, simultaneously convert the data sequences of the optically transmitted signals into electrical signals which are evaluated by the mobile computer unit.
The arrangement in accordance with the invention can be effected in a particularly simple and cost favourable fashion if, for bi-directional data transfer between the control unit of the functional units and the mobile computer unit, the transmitting and receiving units forming the transfer channels are constructed as semiconductor diodes working in the infrared region. 5 In this connection, a constructionally simple solution is achieved if the data exchange between the transmitting/receiving unit of the functional unit interface and the transmitting/receiving unit of the mobile computer unit takes place in both directions via one and the same transfer channel, wherein the respective semiconductor diodes work one time as transmitter and another time as receiver.
In this connection, the semiconductor diode of the mobile computer unit is fixed lying opposite the semiconductor diode of the functional unit interface on the functional unit and connected via a second electrical connection with the interface electronics arranged on or in the mobile computer unit.
Another solution for the underlying problem is achieved in that the sending and receiving unit of the functional unit interface arranged fixed on the functional unit and the sending and receiving unit install fixed on the mobile computer unit are connected together via a light guide for transferring the wireless signal.
The invention may be realised in numerous embodiments.
Some of these are further explained with reference to the accompanying drawings, in which:
Figure 1 shows a first device in accordance with the invention Figure 2 shows a second device in accordance with the invention Figure 3 shows a first interface, and Figure 4 shows a second interface.
Identical features are characterised by the same reference numbers in all four Figures of the drawings.
In Figure 1, the principle of the data transfer device in accordance with the invention is illustrated. An offset sheet printing press 1 has, in this connection, several functional units, which are not illustrated in detail. A feeder unit 2 is arranged to feed sheets to be printed to a first offset printing unit 3. Following this first offset printing unit 3 is a second offset printing unit 4. A different ink is printed in each printing unit. Following on the second offset printing unit 4 is a varnishing unit 5 to which is connected a delivery 6 for receiving the printed sheets.
Each of the individual functional units 2 to 6 of the printing press 1 has, in this connection, a control unit 7 which, in decentralised fashion, monitors all of the control and monitoring processes necessary for the respective functional units 2 to 6. The control units 7 of the individual functional units 2 to 6 are, in this connection, constructed identically and consist of an interface 8 which is connected with a microprocessor 9.
In order to be able to check the functional capacity of the individual control units 7 and/or of the entire respective functional units 2 to 6 or on the arising of a defect to be able to carry out a targeted error search, the interface 8 of the control unit 7 of each functional unit in the particular case illustrated is constructed as an infrared interface which makes possible the wireless transmission and the wireless receipt of data between the functional units 2 to 6 and a transportable servicing computer 10. The servicing computer 10 likewise has an infrared interface 12 which is linked with a second microprocessor 13.
The device in accordance with the invention however is not merely related to the contactless data exchange by means of infrared devices. Also other galvanically decoupled arrangements such as directional radio are conceivable.
As shown in Figure I with respect to functional units 2, 4 and 6, the interface 8 consists of a transmitting/receiving unit 11 and an interface electronics 15. The transmitting/receiving unit 11 of each interface 8 of the functional units 2 to 6 can, in this connection, have in each case a separate transmission and a separate receiving device. However, when using semiconductor diodes, these diodes can work both as transmitters and also as receivers. The transmission/receiving unit 16 of the interface 12 of the servicing computer 10 is, in this connection, always constructed equivalently (shown in more detail and further explained below with reference to Figures 3 and 4).
Each transmission/reception unit 11 radiates the signal into a spatial cone 14jillustrated in Figure 1 for functional units 4 and 5) which is preset by its specific geometry and mounting. The transmission/receiving unit 16 of the interface 12 of the servicing computer 10 must, in this connection, be located within this spatial cone 14 in order to be able to receive an error-free signal, or to send one out.
In order to effect such error-free transfer paths for every conceivable case of application in maintenance and diagnostics, the transmission/receiving unit 11 of the second offset printing unit 4 is arranged spacially separated from its interface electronics 15. While the interface electronics 15 is arranged in the neighbourhood or within the control unit 7 of the offset printing unit 4, the transmission/receiving unit 11 is constructed in mobile f ashion and connected via an electrical lead 17 with the interface electronics 15. As evident from Figure 1, the transmission/receiving unit 11 can be fixed at any position desired to the outside on the housing of the offset printing unit 4. In this connection, the transmission/ receiving unit 11 is constructed so that it can be fixed where desired, for example by being attached adhesively, magnetically or with suction cups or with a simple catch closure, at different positions on the press. The electrical connection 17 may be in the form of a spiral cable or a cable which rolls itself up so that the connection remains maintained at all times, but without trailing leads.
Referring to Figure 2, this shows an alternative arrangement where, on the first offset printing unit 3, arranged above the transmission/receiving unit 11 of the interface of the functional unit 3 and covering this is a mechanical fixture 18, to which a light guide 19 is fixed, the other end of which ends in a second fixture 20 mechanically fixed to the servicing computer 10, wherein the input of the light guide 19 is arranged lying directly opposite the in each case stationary arranged transmission/receiving unit 11 of the functional interface 8 or of the transmission/receiving unit 16 of the interface 12 of the service computer 10.
Since the light guide 19 likewise constitutes a flexible device, also in the case of this embodiment, each service and maintenance case can be carried out without the transmission path being destroyed by intruding press parts or similar. The degree of movement of the servicing computer 10 is accordingly unlimited.
As shown in Figure 2, on the varnishing unit 5, a further construction possibility for use in releasing the invention is illustrated. The stationary constructed transmission/receiving unit 11 of the functional unit interface 8 is surrounded by a m echanical adaptor 21 which accommodates the infrared interface 12 of the servicing computer 10, which comprises the transmission/receiving unit 16 and the respective interface electronics 22 as shown in the other depictions of the servicing computer 10 in Figure 1). In this case, the interface electronics 22 modulates the signals emitted from the control unit 7 of the functional unit 4 and sent out by the transmission unit of the functional unit interface 8 as well as of the receiving unit of the interface 12 of the service computer 10 and converts them into such signals as can be transmitted via a second electrical connection 23 to a standard V24 interface on the servicing computer 10 (denoted V24 in Figure 2) and can be processed by this. In the opposite direction, the electrical signals of the servicing computer 10 are modulated and used for the control of the transmission unit of the interface 12 of the servicing computer 10.
Various detailed constructions of the infrared interface are illustrated in Figures 3 and 4.
Figure 3 shows an optoelectrical interface 12 of the servicing computer 10, which has an optical receiver 24 and a optical transmitter 25, to which, in each case, a light guide 26 or 27 respectively is led. The optical receiver 24 has, in this connection, an optical input to which the light guide 26 is connected and in the electrical output of which, via a diode 28, is connected with a common electrical input/output construction 29 of the interface 12. Connected to this electrical input/output connection 12 is the microprocessor 13 of the servicing computer 10. 5 To the electrical input/output connection 29, there also leads via a second diode 30 the electrical input of the optical transmitter 25, to the optical output of which the second light guide 27 is connected. Between the two diodes 30 and the electrical input of the optical transmitter 25, a logic unit 31 is arranged. In addition to all of this, the logic unit 31 is connected with the electrical output of the optical receiver 24.
If a signal is present at the optical receiver 24, the electrical output signal arrives via the diode 28 to the common output/input connection 29 of the interface 12. Additionally, this signal is fed via the second diode 30 to the logic unit 31. Simultaneously the electrical output signal is provided to the other input of the logic unit 31. Since the signals fed to the logic unit 31 are the same, the output signal of the logic unit is zero. Thereby it is prevented that the received signals are immediately emitted again via the optical transmitter 25 to the second light guide 27.
If, in the other case, an electrical signal is coming from the microprocessor 13 to the common input/output connection 29, the signals, which are fed to the logic unit 31, are no longer the same. A signal is transferred to the input of the optical transmitter 25 and from this via the light guide 27 sent out to the functional unit interface 8. This functional unit interface 8 is constructed equivalently to the just described interface 12 and likewise has an optical receiver 32 as well as an optical transmitter 33. The optical receiver 32 is connected via a diode 34 with a common input/output connection 35 of the interface 8, to which the microprocessor 9 of the control unit 7 is connected. Also here between the common input/output connection 35 and the optical transmitter 33 in the already described fashion, a logic unit 36 is fitted, to which, via a second diode 37 and from the optical receiver 32, in each case a signal is fed. Depending in each case on whether both of the signals are the same or not, the logic unit 36 enables the emission of a signal via the light connector 26 to the interface 12.
Because of this arrangement, only one electrical lead between computer and interface is required for bidirectional data exchange.
If the transmitting and receiving unit is to be constituted using just one semiconductor diode in each, the interface arrangement in accordance with Figure 4 is recommended, in which are the functional unit interface 8 and the interface 12 for the servicing computer 10 are constructed identically.
In the interface 12 of the servicing computer 10 in the case illustrated in Figure 4, includes a semiconductor diode 38 is switched over by the microprocessor 13 with the aid of a relay 39 and two changeover switches 40 and 41, either to be transmitter or receiver. This is simply achievable in that the changeover switches 40, 41 are alternately supplied with a voltage by the microprocessor 31 in the permitted or locking direction.
In the circuit of the functional unit interface 8 of the functional units 2 to 6, shown on the right hand side of Figure 4, a semiconductor diode 42 is switched over by the microprocessor 9 in the contrary sense relative to that of the interface 12 of the servicing computer 10 with the aid of a relay 43 and two changeover switches 44 and 45 so as to act as a transmission or receiving circuit respectively.
Claims (10)
1. A device for wireless transfer of signals between a control system forming part of a printing press and a mobile computer unit, wherein the control system of the printing press consists of several control units and each control unit is constructed for the control and/or monitoring of the functional sequence of a functional unit of the printing press and which has for wireless bi-directional data transfer between each control unit and the mobile computer unit, an interface connected with the control unit, wherein the mobile computer unit has an interf ace, and wherein, f or ef f ecting the wireless transfer of the signals between the two interfaces, these can be directed towards one another, wherein each functional unit interface and the interface of the mobile computer unit consists of a transmitter and a receiving unit for the signals which are to be exchanged wirelessly and an interface electronics, at least the transmitting and receiving units of at least one of the functional unit interfaces and/or of the interface of the mobile computer unit being arranged spatially separated from the corresponding functional units and/or the mobile computer unit.
2. A device according to Claim 1 wherein the interfaces are directed to one another across an air gap with each being located in the volume of radiation emitted from the other.
3. A device according to Claim 1 wherein the interfaces are directed to one another via one or more light guides.
4. A device according to any one of Claims 1 to 3 wherein the transmission and receiving unit of the functional unit interface connected with the control unit is constructed so that it can be altered in position and is connected via an electrical connection with the control unit arranged in or on the functional unit.
5 S. A device according to Claim 4 wherein the transmission and receiving unit is adapted to be fixed externally to the functional unit.
6. A device according to any one of Claims 1 to 3 wherein the transmission and receiving unit of the mobile computer unit is arranged lying opposite to the transmission and receiving unit of the functional unit interface, whereby the transmission and receiving unit and the interface electronics of the mobile computer unit are fixed to the functional unit and are connected via an electrical connection with the mobile computer unit.
7. A device according to any one of the preceding Claims wherein for bidirectional data transfer between the control unit of each functional unit and the mobile computer unit, the transmitting and receiving units constituting the transfer channels are constructed as semiconductor diodes operating in the infrared region.
8. A device according to Claim 7 wherein the data exchange between the transmission/receiving unit of the functional unit interface and the transmission/receiving unit of the mobile computer unit takes place in both directions via one and the same transfer channel, wherein the respective semiconductor diodes work in one case as transmitter and in another case as receiver.
9. A device according to Claim 8 wherein the semiconductor diode of the mobile computer unit is fixed lying oppositely to the semiconductor diode of the - functional unit interface on the functional unit and is connected via a second electrical connection with the interface electronics arranged on or in the mobile computer unit. 5
10. A device for wireless signal transfer between control units associated with functional units on printing presses and a mobile diagnostic or maintenance computer unit substantially as hereinbefore described 10 with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29918654U DE29918654U1 (en) | 1999-10-22 | 1999-10-22 | Device for the wireless transmission of signals between a control system of a printing press and a mobile computing unit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0025808D0 GB0025808D0 (en) | 2000-12-06 |
| GB2355432A true GB2355432A (en) | 2001-04-25 |
| GB2355432B GB2355432B (en) | 2001-12-19 |
Family
ID=8080645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0025808A Expired - Fee Related GB2355432B (en) | 1999-10-22 | 2000-10-20 | Device for wireless transfer of signals between a control system of a printing press and a mobile computer unit |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE29918654U1 (en) |
| FR (1) | FR2800007A1 (en) |
| GB (1) | GB2355432B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385825A (en) * | 2002-02-28 | 2003-09-03 | Woodford Litho Ltd | Printing press with a portable remote console for setting and recording the zero position of at least one ink-key |
| CN101177064B (en) * | 2006-11-08 | 2012-08-22 | 海德堡印刷机械股份公司 | Printing press with several operating zones |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10311284B4 (en) | 2003-03-14 | 2005-11-24 | Koenig & Bauer Ag | Printing machine with at least two printing units |
| DE10357429B4 (en) | 2003-12-09 | 2018-07-19 | Heidelberger Druckmaschinen Ag | Modular sheet-fed rotary printing machine |
| DE102008009177A1 (en) * | 2008-02-15 | 2009-08-20 | Manroland Ag | Press control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2226729A (en) * | 1988-11-01 | 1990-07-04 | Bicc Plc | Infrared communication network |
| US4942534A (en) * | 1987-12-08 | 1990-07-17 | Nissan Motor Company, Limited | Signal-transmission type production supervising system including IC card and wireless type interface unit |
| GB2300986A (en) * | 1995-05-15 | 1996-11-20 | Asahi Kogaku Kk | Optical data communication apparatus for printer |
| US5828146A (en) * | 1994-08-13 | 1998-10-27 | Bfi Betriebstechnik Gmbh | Apparatus for the bidirectional transfer of information |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3614744C2 (en) * | 1986-04-30 | 1994-11-10 | Koenig & Bauer Ag | Device for controlling a rotary printing machine |
| DE9321349U1 (en) * | 1993-02-27 | 1997-05-28 | Heidelberger Druckmaschinen Ag, 69115 Heidelberg | Device for controlling individual functional units of a printing press |
| DE29716311U1 (en) * | 1997-09-11 | 1997-12-04 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Maintenance arrangement on a printing press |
-
1999
- 1999-10-22 DE DE29918654U patent/DE29918654U1/en not_active Expired - Lifetime
-
2000
- 2000-10-03 FR FR0012554A patent/FR2800007A1/en not_active Withdrawn
- 2000-10-20 GB GB0025808A patent/GB2355432B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942534A (en) * | 1987-12-08 | 1990-07-17 | Nissan Motor Company, Limited | Signal-transmission type production supervising system including IC card and wireless type interface unit |
| GB2226729A (en) * | 1988-11-01 | 1990-07-04 | Bicc Plc | Infrared communication network |
| US5828146A (en) * | 1994-08-13 | 1998-10-27 | Bfi Betriebstechnik Gmbh | Apparatus for the bidirectional transfer of information |
| GB2300986A (en) * | 1995-05-15 | 1996-11-20 | Asahi Kogaku Kk | Optical data communication apparatus for printer |
Non-Patent Citations (1)
| Title |
|---|
| JP050233165 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385825A (en) * | 2002-02-28 | 2003-09-03 | Woodford Litho Ltd | Printing press with a portable remote console for setting and recording the zero position of at least one ink-key |
| CN101177064B (en) * | 2006-11-08 | 2012-08-22 | 海德堡印刷机械股份公司 | Printing press with several operating zones |
| US8973499B2 (en) * | 2006-11-08 | 2015-03-10 | Heidelberger Druckmaschinen Ag | Apparatus for operating a printing press with a plurality of operating zones, printing press and machine having the apparatus and method for safely operating a machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0025808D0 (en) | 2000-12-06 |
| GB2355432B (en) | 2001-12-19 |
| DE29918654U1 (en) | 1999-12-30 |
| FR2800007A1 (en) | 2001-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20041020 |