GB2350207A - Interactive system between machine tool and operator - Google Patents

Interactive system between machine tool and operator Download PDF

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Publication number
GB2350207A
GB2350207A GB9911397A GB9911397A GB2350207A GB 2350207 A GB2350207 A GB 2350207A GB 9911397 A GB9911397 A GB 9911397A GB 9911397 A GB9911397 A GB 9911397A GB 2350207 A GB2350207 A GB 2350207A
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GB
United Kingdom
Prior art keywords
finishing
program
machine tool
profile
operator
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
Application number
GB9911397A
Other versions
GB2350207B (en
GB9911397D0 (en
Inventor
Huai-Sheng Lan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Falcon Machine Tools Co Ltd
Original Assignee
Falcon Machine Tools Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US09/309,593 external-priority patent/US6397124B1/en
Application filed by Falcon Machine Tools Co Ltd filed Critical Falcon Machine Tools Co Ltd
Priority to GB9911397A priority Critical patent/GB2350207B/en
Priority to DE19923283A priority patent/DE19923283A1/en
Priority to ES009901260A priority patent/ES2154223B1/en
Publication of GB9911397D0 publication Critical patent/GB9911397D0/en
Priority to FR9910350A priority patent/FR2797410B1/en
Publication of GB2350207A publication Critical patent/GB2350207A/en
Application granted granted Critical
Publication of GB2350207B publication Critical patent/GB2350207B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/4093—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
    • G05B19/40931—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of geometry
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/409—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using manual data input [MDI] or by using control panel, e.g. controlling functions with the panel; characterised by control panel details or by setting parameters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/4093—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
    • G05B19/40937—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of machining or material parameters, pocket machining
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/32—Operator till task planning
    • G05B2219/32128—Gui graphical user interface
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36223—Enter machining conditions, determine automatically machining data
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36267—Process planning editor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/36—Nc in input of data, input key till input tape
    • G05B2219/36271—Enter, edit workpiece data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Geometry (AREA)
  • Numerical Control (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The operator is prompted by pattern information (screens), inputs data about product finishes and workpiece profile coordinates and a processor activates the relevant control programs and controls the machine tool. The machine tool comprises a controller with a CPU, a control panel 14, and an associated storage unit (memory) 12, which contains a public data area 22 for storing, temporarily, data input from the control panel, and a program data area 24, which stores finishing programs. A profile path editor, is located in the CPU, and converts workpiece coordinates into an actual workpiece profile path, and a path program. A pattern interface unit, is connected to the CPU, and transmits pattern signals generated by the CPU to the operator at the control panel, so as to guide the operator to enter required data about product finishes and workpiece profile coordinates, the entered data actuating the controller to actuate one of the finishing programs, to regulate the finishing operation by the machine tool.

Description

2350207 INTERACTIVE SYSTEM BETWEEN MACHINE TOOL AND OPERATOR
FIELD OF THE INVENTION
The present invention relates generally to a machine tool, and more particularly to an interactive system between the machine tool and an operator of the machine tool.
BACKGROUND OF THE INVENTION
The old-fashioned machine tool was manually operated and was thus inefficient. The CNC machine tool is a piece of modem machinery and is relatively more efficient. However, the operation of the CNC controller for later use such that the instructions of a machine operator trigger the program to bring about a specific performance of the machine tool. The drawback of the CNC mdchine tool is the programming which is rather time-consuming.
1 SUMMARY OF THE INVENTION
The primary objective of the present invention is therefore to provide an interactive system involving a mode of operation in which there is a continual exchange of information in the form of graph between a machine tool and an operator of the machine tool such that the machine tool is instructed by the operator to execute the program that is pre-stored in the controller of the machine tool. As the workpiece profile coordinate data are entered by the operator, the actual path is automatically edited by the interactive system so as to execute the finishing operation. The complicated and time-consuming work of programming the operations to be performed by the machine tool is thus averted.
The interactive system of the present invention involves a machine tool and an operator of the machine tool. The machine tool comprises a controller which is formed of a central processing unit, a control panel connected with the central processing unit, a control panel connected with the central processing unit, a storage unit connected with the central processing unit for keeping data and programs with regard to the finishing operation of the machine tool, a profile path editor disposed in the central processing unit and connected with the storage unit for converting the workpiece profile coordinate intote actual profile path, and pattern interface unit connected with the central processing unit and the storage unit for transmitting the signal in the form of pattern to the operator, so As to enable the controller to bring about the control signals in accordance with the instructions given by the operator. The machine tool is thus controlled by the control signals to execute a predetermined operation.
2 BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a basic framework of a preferred embodiment of the present invention.
FIG. 2 shows contents of a specific finishing program of the preferred embodiment of the present invention.
FIG. 3 shows a framework of the pattern interface of the preferred embodiment of the present invention.
FIG. 4 is a work selection frame of the preferred embodiment of the present invention, showing the work selection of the grinding wheel finishing and the workpiece grinding.
FIG. 5 shows a functional selection frame of the grinding wheel finishing of the preferred embodiment of the present invention.
FIGS. 6 and 7 show contents frames set up for the profile finishing function of the preferred embodiment of the present invention.
FIG. 8 shows a pattern interactive operational flow chart of the grinding wheel finishing of the preferred embodiment of the present invention.
FIG. 9 shows a set-up contents frame of the workpiece polishing 3 function of the preferred embodiment of the present invention-. - FIGS. 10 and 11 shown set-up contents frames of the workpiece polishing function of the preferred embodiment of the present invention.
FIG. 12 shows a pattern interactive operational flow chart of the workpiece polishing of the preferred embodiment of the present invention.
FIG. 13 shows a path set-up frame of the profile finishing function of the grinding wheel finishing work of the preferred embodiment of the present invention.
FIG. 14 shows a path set-up frame of the profile finishing function of the workpiece polishing work of the preferred embodiment of the present invention.
FIG. 15 shows a path editing frame of the preferred embodiment of the present invention.
FIG. 16 shows a program execution flow chart of the grinding wheel finishing of the preferred embodiment of the present invention.
FIG. 17 shows a program execution flow chart of the workpiece polishing of the preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
4 As shown in FIG. 1, a man-machine interactive system 10 embodied in the present invention is disposed in a controller of a grinding machine and composed of a storage unit 12, a profile path editor (not shown in the drawing), and a pattern interface unit 14.
The storage unit 12 is a variable memory and is connected with the central processing unit (CPU) of the controller. The storage unit 12 comprises a public data area 22 and a program data area 24. The public data area 22 is used for a temporary storage of the finishing condition data which are transmitted from the control panel (not shown in the drawing) of the controller. The program data area 24 comprises a grinding wheel finishing program that can be executed alone, a workpiece polishing program, and a special finishing program 26 which is a path finishing program, including a macro collection of instructions regulating the basic action such as execution of grinding machine tool (grinding wheel) and capable of being called by the grinding wheel finishing program or the workpiece polishing program of the storage unit 14. so as to execute the controlling of the tool. The program contents of the path finishing program are shown in FIG. 2, in which the meanings of the parameter symbols of each instruction are indicated as follows:
The first instruction 0: program code The second instruction:
B: tool advancing increment C: free pass time s between two tool advances D: global variable number of actual tool advancing quantity of this finishing, which is to be transmitted back to the called program.
F: finishing advance speed H: finishing mode selection (1: finished workpiece; 0- unfinished workpiece) 1: spark-out times The third instruction:
P: path describing program (auxiliary program) number Y: Y-axis path starting point coordinate Z: Z-axis path starting point coordinate K: starting point of tool measurement E: Is the path starting point equal to the starting point of tool measurement? (1; yes; 0: no) D: tool radius The fourth instruction M30: end of program The profile path editor is disposed in the CPU of the controller and is connected with the storage unit 12 for converting the workpiece profile coordinate into the workpiece actual profile pattern, and the path program which is stored in the program data area 24 of the storage unit 12. The workpiece profile coordinate referred to above is entered by the machine operator via the control panel of the controller of the grinding machine.
The pattern interface unit 14 is the screen of the controller and is used to transmit the signals generated by the CPU to the user in the form of pattern for guiding the user to store the data on the finishing condition in the storage unit 12 via the control panel of the controller. Now referring to FIG. 3, the contents of data shown by the pattern interface unit 14 include a grinding wheel finishing work selection 28 and a workpiece polishing work selection 30. The grinding wheel finishing work selection 28 has the functional selections of a surface finishing 32, 6 a formed rolling wheel finishing 34, a wheel head rolling wheel finishing 36, and a profile finishing 38. The workpiece polishing work selection 30 has functional selections of a surface polishing 40, a cross polishing 42, an equidistance equidepth groove grinding 44, and a profile polishing 46. In fact, the functional selections of the grinding wheel finishing work selection 28 and the workpiece polishing work selection 30 are openended.
As shown in FIG. 4, the first step of using the interactive system 10 is to press a function fast key " GRAPW' 47 of the control panel of the grinding machine. As a result, a frame 48 is shown in the controller. The frame 48 includes a grinding wheel finishing pattern 50 and a workpiece polishing pattern 52. Depending on the requirement of the finishing condition, the machine operator may select a finishing key 54 or a polishing key 56. When the finishing key 54 is pressed, the controller shows another frame 585 asshown in FIG. 5. The frame 58 has a surface finishing pattern 60, a formed rolling wheel finishing pattern 62. a wheel head rolling wheel finishing pattern 64. and a profile finishing pattern 66. Located under the frame 58 are a surface finishing key 68, a formed rolling wheel finishing key 70, a wheel head rolling wheel finishing key 72, a profile finishing key 74, and a withdrawal key 76. When the operator presses the profile finishing key 74, the controller shows a first frame 78 relating to the profile finishing function, as shown in FIG. 6. The frame 78 has a profile finishing pattern 80, a parameter set-up area 82, an execution key 84, a deletion key 86, and a withdrawal key 88. The parameter set-up area 82 has a grinding wheel number, the grinding wheel surface speed, the grinding wheel outer diameter, the grinding wheel width, the zero grinding number, and the Y- axis safe altitude coordinate. Now referring to FIG. 7, the second frame 90 has a profile 7 finishing pattern 92, a parameter set-up area 94, an execution key 96, and a withdrawal key 98. The parameter set-up area 94 comprises two status establishments of a new grinding wheel finishing and a finished grinding wheel finishing. The contents of each status establishment include a finishing sum, a finishing increment, a finishing speed, and a lost motion number. The operational flow chart of the grinding wheel finishing pattern is shown in FIG. 8.
As shown in FIG. 9, when the polishing soft key 56 is pressed by the operator, the controller shows a frame 100 which has a surface polishing pattern 102, a cross polishing pattern 104, an equidistance equidepth groove polishing pattern 106, and a profile polishing pattern 108. Located under the ftame 100 are a surface polishing key 110, a cross polishing key 112, an equidistance equidepth groove polishing key 114, a profile polishing key 116, and a withdrawal key 118. As shown in FIGS. 10 and 11, when the profile polishing key 116 is pressed by the operator, the screen of the controller shows all set-up contents regarding the workpiece profile polishing. The operator may make an appropriate selection. The interactive operational flow chart of the workpiece polishing pattern is shown in FIG. 12.
The grinding wheel finishing work selection 28 and the workpiece polishing work selection 30 further have an editing finishing function or a polishing path function. As shown in FIGS. 13 and 14, the path is edited by entering respectively the frames of the profile finishing 74 and the profile polishing 116. Thereafter, press the execution keys 120, 122 under the function selections of " path one ediC, so as the attain the path editing frame. The operator enters the workpiece profile coordinate into the two frames, the workpiece actual profile is then shown in the frame, 8 as shown in FIG. 15, thereby enabling one to determine the. path of the grinding wheel finishing or the surface polishing, which may be filed. The execution flow charts of the grinding wheel finishing and the workpiece polishing are shown in FIGS. 16 and 17.
As described above, the interactive system 10 of the present invention enables the finishing data to be transmitted in the form of graph or pattern to the operator via the pattern interface unit 14. The operator is thus guided to select the work selection or to set up the finishing condition so as to enable the machine tool to execute the finishing program. In addition, the actual workpiece profile path can be edited automatically by the system of the present invention by entering the workpiece profile coordinate into the controller of the system of the present invention. As a result, the tedious and time-consuming task of writing a finishing program is thus eliminated.
9

Claims (8)

WHAT IS CLAIMED IS:
1. An interactive system between a machine tool and an operator of the machine tool, the machine tool comprising a controller which comprises a central processing unit, and a control panel connected with the central processing unit, said interactive system comprising:
a storage unit connected with the central processing unit and comprising a public data area and a program data area whereby said public data area is for use in storing temporarily finishing condition data which are entered via the control panel of the controller and whereby said program data area is used to store finishing programs, and a special finishing program which is intended to regulate the advancing motion of a tool of the machine tool; a profile path editor disposed in the central processing unit and connected with said storage unit for converting a workpiece profile coordinate into an actual workpiece profile path and a path program whereby said path program is stored in said storage unit; and a pattern interface unit connected with the central processing unit and said storage unit for transmitting a specific signal generated by the central processing unit to the operator in the form of pattern, so as to guide the operator to enter a finishing condition into said storage unit via the control panel whereby said finishing condition actuates the controller to bring about a control signal to activate one of said finishing programs and said special finishing program to enable the machine tool to execute a finishing operation.
2. The system as defined in claim 1, wherein said storage unit is a variable memory.
3. The system as defined in claim 2, wherein said program data area stores a grinding wheel finishing program and a workpiece polishing program.
4. The system as defined in claim 3, wherein said grinding wheel finishing program comprises instructions for a surface finishing, a formed rolling wheel finishing, a wheel head rolling wheel finishing, and a profile finishing.
5. The system as defined in claim 3, wherein said workpiece polishing program comprises instructions for a surface polishing, a cross polishing, an equidistance equidepth groove polishing, and a profile polishing.
6. The system as defined in claim 3, wherein said grinding wheel finishing program is an auxiliary program when said grinding wheel finishing program is called by said workpiece polishing program.
7. The system as defined in claim 1, wherein said special finishing program is a macro collection of instructions for executing the operation of a tool of the machine tool.
8. An interactiave system substantially as hereinbefore described with reference to the accompanying drawings.
GB9911397A 1999-05-11 1999-05-18 Interactive system between machine tool and operator Expired - Fee Related GB2350207B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9911397A GB2350207B (en) 1999-05-11 1999-05-18 Interactive system between machine tool and operator
DE19923283A DE19923283A1 (en) 1999-05-11 1999-05-20 Interactive system e.g. for CNC machine tool, has controller with CPU, control panel and associated memory which contains public data area for storing, temporarily, data input from control panel
ES009901260A ES2154223B1 (en) 1999-05-11 1999-06-08 INTERACTIVE SYSTEM BETWEEN A MACHINE-TOOL AND AN OPERATOR.
FR9910350A FR2797410B1 (en) 1999-05-11 1999-08-10 INTERACTIVE SYSTEM BETWEEN A MACHINE TOOL AND AN OPERATOR

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/309,593 US6397124B1 (en) 1999-05-11 1999-05-11 Interactive system between machine tool and operator
GB9911397A GB2350207B (en) 1999-05-11 1999-05-18 Interactive system between machine tool and operator
DE19923283A DE19923283A1 (en) 1999-05-11 1999-05-20 Interactive system e.g. for CNC machine tool, has controller with CPU, control panel and associated memory which contains public data area for storing, temporarily, data input from control panel
ES009901260A ES2154223B1 (en) 1999-05-11 1999-06-08 INTERACTIVE SYSTEM BETWEEN A MACHINE-TOOL AND AN OPERATOR.
FR9910350A FR2797410B1 (en) 1999-05-11 1999-08-10 INTERACTIVE SYSTEM BETWEEN A MACHINE TOOL AND AN OPERATOR

Publications (3)

Publication Number Publication Date
GB9911397D0 GB9911397D0 (en) 1999-07-14
GB2350207A true GB2350207A (en) 2000-11-22
GB2350207B GB2350207B (en) 2003-08-20

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GB9911397A Expired - Fee Related GB2350207B (en) 1999-05-11 1999-05-18 Interactive system between machine tool and operator

Country Status (4)

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DE (1) DE19923283A1 (en)
ES (1) ES2154223B1 (en)
FR (1) FR2797410B1 (en)
GB (1) GB2350207B (en)

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EP1914613A1 (en) 2006-10-16 2008-04-23 SCM GROUP S.p.A. System and method for managing and controlling an operating machine

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CN109933073B (en) * 2019-04-01 2020-12-01 珠海市一微半导体有限公司 Automatic generation method of robot backseat code

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US4530046A (en) * 1982-03-23 1985-07-16 Toyoda Koki Kabushiki Kaisha Method of inputting machining information to a machine tool numerical controller and apparatus therefor
EP0207998A1 (en) * 1984-12-28 1987-01-14 Fanuc Ltd. Method of preparing nc data
EP0348522A1 (en) * 1987-12-17 1990-01-03 Fanuc Ltd. Method of inputting part profile
US5465215A (en) * 1994-07-07 1995-11-07 Cincinnati Milacron Inc. Numerical control method and apparatus
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Publication number Priority date Publication date Assignee Title
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Also Published As

Publication number Publication date
ES2154223A1 (en) 2001-03-16
DE19923283A1 (en) 2000-11-23
ES2154223B1 (en) 2001-10-01
FR2797410A1 (en) 2001-02-16
GB2350207B (en) 2003-08-20
FR2797410B1 (en) 2002-10-11
GB9911397D0 (en) 1999-07-14

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Date Code Title Description
AT Applications terminated before publication under section 16(1)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110518