GB2263127A - Apparatus and process for manufacture of windows and doors - Google Patents
Apparatus and process for manufacture of windows and doors Download PDFInfo
- Publication number
- GB2263127A GB2263127A GB9200140A GB9200140A GB2263127A GB 2263127 A GB2263127 A GB 2263127A GB 9200140 A GB9200140 A GB 9200140A GB 9200140 A GB9200140 A GB 9200140A GB 2263127 A GB2263127 A GB 2263127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- conveyor
- closure member
- support
- base
- 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
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/04—Wing frames not characterised by the manner of movement
- E06B3/06—Single frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/08—Fittings for doors and windows of buildings
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Securing Of Glass Panes Or The Like (AREA)
Abstract
The apparatus includes a glazing device 60 having an elongate roller conveyor 62 for delivery of a window frame 10 between a glass panel fitting station 69, a frame alignment device 70 and a sealing station 90. A frame is mounted on the conveyor, glass panes mounted in the frame and the glazed frame delivered along the conveyor to the alignment device, jaws (72, 73 Fig. 11) of which engage opposite sides of the frame to square it and then the panes are rigidly secured on the frame to fix the frame in the correctly aligned position. Each jaw is movable between an operative frame engaging position and a release position away from the frame to allow insertion and removal of the frame from the device. Downstream of the alignment device glazing strips are fitted to the frame to seal between the glass panes and the frame. <IMAGE>
Description
"An apparatus and process for manufacturinu closure members"
This invention relates to an apparatus and process for manufacturing closure members, in particular glazed closure members such as windows and doors.
According to the invention there is provided apparatus for manufacturing glazed closure members formed by a frame in which one or more glass panels are mounted, the apparatus including a glazing device comprising an elongate ground engaging base, an elongate conveyor mounted on the base, an upright support wall mounted on the base behind the conveyor to support a closure member frame mounted upright on a support surface of the conveyor, a glass panel fitting station being formed at an inlet end of the conveyor for mounting one or more glass panels within a closure member frame supported on the conveyor, a closure member frame alignment device mounted within the support wall downstream of the glass fitting station, the alignment device having a support frame mounted behind the conveyor, a complimentary pair of upright spacedapart parallel frame alignment jaws mounted on the support frame above the conveyor and perpendicular to the conveyor support surface, the jaws being movable relative to each other to adjust the distance between the jaws, and each jaw movable between an operative position over the conveyor support surface for engagement with a closure member frame supported on the conveyor and a retracted stored position to one side of the conveyor support surface to allow passage of the closure member frame along the conveyor past the jaw, a sealing station being formed downstream of the alignment device for fitting sealing strips to the closure member frame to seal between the glass panels and frame, and a checking station downstream of the sealing station for inspection of the finished glazed closure member.
In one embodiment of the invention one of the jaws of the alignment device is a sliding jaw mounted on a carriage which is slidable along the support frame to adjust the spacing between the jaws.
Preferably, the sliding jaw is mounted on the carriage by means of spaced-apart rams operable to move the jaw transversely of the conveyor support surface between the operative position and the stored position and the second jaw is pivotally mounted on the support frame and is pivotable by means of a ram extending between the support frame and second jaw to move the second jaw between the operative position and the stored position.
In another embodiment the apparatus further includes a clamped device for supporting a closure member frame in-a horizontal position, the clamp device comprising a base having. a horizontal upper support surface for supporting the frame on the base, a clamp bar mounted on the base above the support surface, means for moving the clamp bar vertically relative to the support surface to clamp a closure member frame therebetween. Preferably, the means for moving the clamp bar comprises a pair of spaced-apart rams mounted on the base.
In another embodiment, the apparatus further includes a drilling device having a ground engaging base, a horizontal roller bed on the base comprising a number of rollers rotatably mounted spaced-apart between a pair of roller support bars, an upright frame support wall mounted on the base behind the roller bed to support a closure member frame mounted on the roller bed in an upright position, a number of drills mounted on the base, each drill movable between a retracted stored position and an extended drilling position to engage and drill holes in a closure member frame mounted on the roller bed, a number of positioning devices mounted on the base selectively having closure member frame engagement means extendable over the roller bed to position a closure member frame relative to one or more of the drills, and clamp means operable to clamp a closure member frame against the support wall for drilling.
In another aspect, the invention provides a process for manufacturing a glazed closure member formed with the apparatus as previously described, the process comprising the steps:
(a) preparing a number of frame members including
bevelling the ends of outer frame members,
(b) joining outer frame members to form a rectangular
frame,
(c) mounting the frame on the glass panel fitting
station of the glazing device and mounting a glass
panel within the frame,
(d) conveying the frame to the alignment device and
positioning the frame between the jaws, the jaws
engaging opposite sides of the frame to square the
frame,
(e) rigidly fixing the glass panel within the frame when
the frame is correctly aligned,
(f) releasing the jaws of the alignment device and
conveying the frame to the sealing station, fitting
sealing strips to the frame between the glass panel
and frame around a periphery of the glass panel, and
(g) delivering the completed frame to the checking
station for inspection.
In a further embodiment of the process, prior to mounting the frame on the glazing device, the frame is mounted on the drilling machine, position the frame relative to the drills as appropriate for that particular frame, drilling any required holes in the frame, and fitting any gaskets and transom frame members to the frame, the transom frame members extending between outer frame members, mounting the frame in the clamping device in a cantilevered position projecting outwardly of the clamping device, and fitting sashes to the frame whilst holding the frame in the clamping device.
The invention will be more clearly understood by the following description of some embodiments thereof, given by way of example only, with reference to the accompanying drawings in which:- Fig. 1 is a flow chart illustrating a process according
to the invention,
Fig. 2 is a perspective view of a drilling machine
forming portion of apparatus according to the invention,
Fig. 3 is a plan view of the drilling machine,
Fig. 4 is a side partially sectioned view of the drilling machine,
Fig. 5 is a detail view illustrating portion of the drilling machine,
Fig. 6 is a perspective view of a clamp device forming portion of apparatus according to the invention,
Fig. 7 is an elevational view of the clamp device,
Fig. 8 is an elevational view of a glazing device forming portion of apparatus according to the invention,
Fig. 9 is a perspective view of portion of the glazing device of Fig. 8 showing a glass panel fitting station,
Fig. 10 is a sectional view taken along the line X-X of
Fig. 9,
Fig. 11 is a detail perspective view of portion of the glazing device of Fig. 8 showing a frame alignment device,
Fig. 12 is a side partially sectioned view along the line
XII-XII of Fig. 11,
Fig. 13 is a plan, partially sectioned view of the
alignment device shown in one position,
Fig. 14 is a view similar to Fig. 13 showing the
alignment device in another position,
Fig. 15 is an exploded view showing portion of an
aluminium closure member frame,
Fig. 16 is a perspective view of portion of a crimping
device for interconnecting the frame members shown in
Fig. 15, and
Fig. 17 is a plan view of the device of Fig. 16.
Referring to the drawings, and initially to Fig. 1 to 14 thereof, there is illustrated an apparatus and process for manufacturing closure members such as glazed windows or doors.
With reference to Fig. 1, the process for manufacturing a PVC window unit will be described. Referring first briefly to
Fig. 9, each window unit comprises a window frame 10 formed by four outer frame members 11. Intermediate transom frame members 12 extend between opposite outer frame members 11 to define openings for sashes 13. Glass panes 14 are mounted within the frame 10.
Frame members 11, 12 are prepared at 20, suitably profiled lengths of PVC being cut to size to form the frame members 11, 12. Each of the outer frame members 11 is provided with mitred ends. The mitred ends of adjacent outer frame members 11 are brought together and welded at a welding station 22 to form a rectangular window frame 10. The frame 10 is then mounted on a drilling machine 30 (see Fig. 2). The drilling machine 30 has a base 31 with a roller bed 32 comprising a number of spaced-apart rollers 33 mounted between spaced-apart roller support bars 34. Upstanding on the base 31 at a rear of the roller bed 32 is an open latticework back wall 35 against which the frame 10 rests. Ram operated clamps 37 mounted spaced-apart on the front roller support bar 34 are operable to clamp the frame 10 against the back wall 35.
Rulers 39 are mounted at a lower end of the back wall 35. A number of positioning devices 40 are mounted along the lower end of the back wall 35. Each positioning device 40 comprises a ram operated rod 41 movable between a retracted position behind the roller bed 32 and an extended position extending out over the roller bed 32 for engagement with the frame 10.
Some or all of the devices 40 can be moved along and fixed at selected positions along the lower end of the back wall 35 to correspond to any desired measurement on the rulers 39. The rulers 39 correspond to a number of drills 42 mounted centrally on the base 31 and movable by means of rams to engage and drill through a frame 10 mounted on the roller bed 32. The frame 10 is positioned on the roller bed 32 by means of an appropriate positioning device 40 and then clamped in position by the clamps 37. Then the drills 42 are operated to drill holes at the required positions on the frame 10, for example, to facilitate later mounting the transom frame member 12 on the frame 10. It will be appreciated that the frame 10 can be quickly and accurately positioned on the drilling machine 30 for drilling of the required holes.Operation of different positioning devices 40 allows holes to be accurately drilled in a number of different positions on the frame 10.
Next gaskets and transom frame members 12 are fitted to the frame 10 at 45 the frame 10 then being mounted in a clamping device 50 as shown in Figs. 6 and 7. The device 50 is of open framework construction having a ground engaging base 51 supporting a raised bed 52 formed by a number of spaced-apart parallel bars 53. Typically, the bed 52 is at normal waist height. The frame 10 is laid on the bed 52 such that portion of the frame 10 projects out over a front end of the bed 52.
A rear end of the frame 10 is clamped to the bed 52 by means of a clamping bar 54 mounted between a pair of rams 55 operable for vertical movement of the clamping bar 54. The rams 55 are mounted on support posts 56 upstanding on the base 51. With the frame 10 clamped as shown in Fig. 6 sashes 13 can be readily easily fitted to the frame 10. A worker has good access all round the appropriate portion of the frame 10 and to both sides of the frame 10 to facilitate the mounting of the sashes. A foot pedal 58 on the base 51 allows operation of the rams 55 leaving a user's hands free to position and support the frame 10 when mounting or removing the frame 10 from the clamping device 50.
Referring now in particular to Figs. 8 to 14, the frame 10 is then delivered to a glazing device 60. The glazing device 60 has an elongate base 61. Mounted on the base 61 is a conveyor 62 comprising a number of rollers 63 mounted between a pair of spaced-apart parallel roller support bars 64. Mounted on the base 61 at a rear edge of the conveyor 62 is an upright open latticework support wall 66. Pads 67 (see Fig. 10) are provided on the front face of the wall 66 to prevent damage to the frames 10. The frames 10 are mounted at an inlet end of the conveyor 62 which forms a glass panel fitting station 69.
With the frame 10 mounted on the conveyor 62 the glass panes 14 can be mounted within the frame 10. Then the frame 10 is moved along the conveyor 62 to an alignment device 70.
The alignment device 70 is shown in Figs. 11 to 14 and has a rectangular outer support frame 71. Mounted on the outer frame 71 are a pair of spaced-apart parallel frame alignment jaws 72, 73 for engagement with opposite sides of the frame 10 (shown in broken outline, Fig. 11). Each of the jaws 72, 73 is movable between an operative position for engagement of the frame 10 and a release position away from the frame 10 to allow insertion and removal of the frame 10 from the device 70. The jaw 72 is pivotally mounted by pivot mountings 75 on the frame 71, the position of the jaw 72 being controlled by a ram 76 extending between the frame 71 and jaw 72. The jaw 73 is mounted on a carriage 78 formed by a post 79 having rollers 80 mounted at each end of the post 79. The rollers 80 engage and roll along top and bottom frame members 81 of the outer frame 71.The jaw 73 is mounted between a pair of rams 84 mounted at each end of the post 79. To position a frame 10 between the jaws 72, 73 the rams 84 are operated to move the jaw 73 away from the carriage 78, as shown in Figs. 12 and 14, to allow passage of the frame 10 between the jaw 73 and carriage 78 along the conveyor 62. The frame 10 is positioned against the jaw 72 which is in the operative position shown in
Figs. 11 and 13, and then the rams 84 are operated to retract the jaw 73 which is rolled along the frame 71 by means of the carriage 78 to engage the free side edge of the frame 10 as shown in Fig. 13. The frame 10 is thus squared between the two jaws 72, 73 and the glass panes 14 can be secured in position on the frame 10 to rigidly fix the frame 10 in the correctly aligned position.It will be appreciated that by having the jaw 73 mounted on a carriage 78 the distance between the jaws 72, 73 can be readily easily adjusted to accommodate window or door frames of different sizes.
When alignment has been completed the ram 76 is operated to pivot the jaw 72 to a rear of the conveyor 62 as shown in Fig.
14 to allow the frame 10 to be moved along the conveyor 62 to a sealing station 90 in which glazing strips are fitted to the frame 10 around the periphery of the glass panes 14, sealing between the panes 14 and the frame 10 and thus completing the window unit.
Downstream of the sealing station 90 the window unit is checked for quality at a checking station 92 and if acceptable it is then packaged for transport.
It will be appreciated that the glazing device 60 allows the frame 10 to be quickly and easily glazed. Advantageously the frames 10 are mounted on the device 60 prior to glazing when they are relatively light and easily handled. The glazed frame 10 is relatively heavy and is conveniently supported on the device 60 on which it can easily be moved to carry out the various operations to the glazed frame 10.
While in the embodiment above a process for the production of
PVC windows has been described, a similar process can be used for the production of aluminium windows and doors, however, the assembly of a frame will differ somewhat. The outer frame members in an aluminium frame are not welded together. Fig.
15 shows a pair of aluminium outer frame members 100 each having a bevelled end 101. An L-shaped connector piece 102 is also shown, the connector piece 102 having grooves 103 on outer surfaces 104. The connector piece 102 is inserted into each frame member 100 and the bevelled ends 101 of the frame members 100 are brought together. Figs. 16 and 17 show a crimping machine 110 for crimping the frame members 100 onto the connector 102 to fix the frame members 100 together. The machine 110 has a frame support bed 111 and a frame position block 112 is upstanding on the bed 111. The block 112 has a pointed head 113 with side walls 114 at right angles to each other. A ram operated clamp 115 is mounted in front of the head 113 and is vertically movable to clamp the frame members 100 on the bed 111. Crimping devices 116 are mounted on the bed 111 facing each side wall 114. The loosely connected frame members 100 are mounted between the block 112 and the crimping devices 116 as shown in Fig. 16 and the clamp 115 operated to rigidly hold the frame members 100 against the bed 111. The crimping devices 116 are then operated to crimp the frame members 100 into engagement with the connector 102. A crimping head 117 is advanced by an hydraulic ram to crimp a sidewall of each frame member 100 into the grooves 103 in the connector 102 as shown in Fig. 17 to rigidly secure the frame members 100 together.
It will be appreciated that the crimping device 110 allows the aluminium frames to be quickly and easily assembled for subsequent glazing as previously described.
The invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail.
Claims (10)
1. Apparatus for manufacturing a glazed closure member
formed by a frame within which one or more glass panels
are mounted, the apparatus including a glazing device
comprising an elongate ground engaging base, an elongate
conveyor mounted on the base, an upright support wall
mounted on the base behind the conveyor to support a
closure member frame mounted upright on a support surface
of the conveyor, a glass panel fitting station being
formed at an inlet end of the conveyor for mounting one
or more glass panels within a closure member frame
supported on the conveyor, a closure member frame
alignment device mounted within the support wall
downstream of the glass fitting station, the alignment
device having a support frame mounted behind the
conveyor, a complementary pair of upright spaced-apart
parallel frame alignment jaws mounted on the support
frame above the conveyor and perpendicular to the
conveyor support surface, the jaws being movable relative
to each other to adjust the distance between the jaws and
each jaw movable between an operative position over the
conveyor support surface for engagement with a closure
member frame supported on the conveyor and a retracted
stored position to one side of the conveyor support
surface to allow passage of the closure member frame
along the conveyor past the jaw, a sealing station being
formed downstream of the alignment device for fitting
sealing strips to the closure member frame to seal
between the glass panels and frame, and a checking
station downstream of the sealing station for inspection
of the finished glazed closure member.
2. Apparatus as claimed in claim 1 wherein one of the jaws
of the alignment device is a sliding jaw mounted on a
carriage which is slidable along the support frame to
adjust the spacing between the jaws.
3. Apparatus as claimed in claim 1 or claim 2 wherein the
sliding jaw is mounted on the carriage by means of
spaced-apart rams operable to move the jaw transversely
of the conveyor support surface between the operative
position and stored position, and the second jaw is
pivotally mounted on the support frame and pivotable by
means of a ram extending between the support frame and
the second jaw to move the second jaw between the
operative position and the stored position.
4. Apparatus as claimed in any preceding claim wherein the
apparatus further includes a clamp device for supporting
a closure member frame in a horizontal position, the
clamp device comprising a base having a horizontal
support surface for supporting the frame on the base, a
clamp bar mounted on the base above the support surface,
means for moving the clamp bar vertically relative to the
support surface to clamp a closure member frame
therebetween.
5. Apparatus as claimed in any preceding claim wherein the
apparatus further includes a drilling device having a
ground engaging base, a horizontal roller bed on the base
comprising a number of rollers rotatably mounted spaced
apart between a pair of roller support bars, an upright
frame support wall mounted on the base behind the roller
bed to support a closure member frame mounted on the
roller bed in an upright position, a number of drills
mounted on the base, each drill movable between a
retracted stored position and an extended drilling
position to engage and drill holes in a closure member
frame mounted on the roller bed, a number of positioning
devices mounted on the base having closure member frame
engagement means selectively extendable over the roller
bed to engage and position a closure member frame
relative to one or more of the drills, and clamp means
operable to clamp a closure member frame against the
support wall for drilling.
6. Apparatus substantially as hereinbefore described with
reference to the accompanying drawings.
7. A process for manufacturing a glazed closure member with
the apparatus as claimed in any preceding claim, the
process comprising the steps:
(a) preparing a number of frame members including
bevelling the ends of outer frame members,
(b) joining outer frame members to form a
rectangular frame,
(c) mounting the frame on the conveyor at the glass
panel fitting station of the glazing device and
mounting a glass panel within the frame,
(d) conveying the frame to the alignment device and
positioning the frame between the jaws, the
jaws engaging opposite sides of the frame to
square the frame,
(e) rigidly fixing the glass panel within the frame
when the frame is correctly aligned,
(f) releasing the jaws of the alignment device and
conveying the frame to the sealing station,
fitting sealing strips to the frame between the
glass panel and frame around a periphery of the
glass panel, and
(g) delivering the completed frame to the checking
station for inspection.
8. A process as claimed in claim 7 wherein prior to mounting
the frame on the glazing device the frame is mounted on
the drilling machine, positioning the frame relative to
the drills as appropriate for that particular frame, and
drilling the required holes in the frame, fitting gaskets
and transom frame members to the frame, the transom frame
members extending between outer frame members, mounting
the frame in the clamping device in a cantilevered
position projecting outwardly of the clamping device, and
fitting sashes to the frame whilst holding the frame in
the clamping device.
9. A process substantially as hereinbefore described with
reference to the accompanying drawings.
10. A glazed closure member whenever manufactured by the
process as claimed in any of claims 7 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9200140A GB2263127B (en) | 1992-01-06 | 1992-01-06 | An apparatus and process for manufacturing closure members |
| BE9200066A BE1003801A7 (en) | 1992-01-06 | 1992-01-22 | Device and method for producing closure elements. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9200140A GB2263127B (en) | 1992-01-06 | 1992-01-06 | An apparatus and process for manufacturing closure members |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9200140D0 GB9200140D0 (en) | 1992-02-26 |
| GB2263127A true GB2263127A (en) | 1993-07-14 |
| GB2263127B GB2263127B (en) | 1995-03-08 |
Family
ID=10708132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9200140A Expired - Lifetime GB2263127B (en) | 1992-01-06 | 1992-01-06 | An apparatus and process for manufacturing closure members |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE1003801A7 (en) |
| GB (1) | GB2263127B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864800A1 (en) * | 2004-01-06 | 2005-07-08 | Ambonati Freres Sarl | Sections machining and fastened units fitting method for e.g. door frame, involves machining sections by centre bore, managing sections by control station, and fitting sections with fastened unit by fitting post controlled by station |
| CN108340134A (en) * | 2018-02-11 | 2018-07-31 | 安徽省蒙城县金鹏建材装饰有限公司 | A kind of alloy window processing unit (plant) |
| CN108955047A (en) * | 2018-07-10 | 2018-12-07 | 安徽省星年华电器有限公司 | A kind of seal strip for refrigerator door assembling equipment |
-
1992
- 1992-01-06 GB GB9200140A patent/GB2263127B/en not_active Expired - Lifetime
- 1992-01-22 BE BE9200066A patent/BE1003801A7/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864800A1 (en) * | 2004-01-06 | 2005-07-08 | Ambonati Freres Sarl | Sections machining and fastened units fitting method for e.g. door frame, involves machining sections by centre bore, managing sections by control station, and fitting sections with fastened unit by fitting post controlled by station |
| EP1559501A2 (en) * | 2004-01-06 | 2005-08-03 | Ambonati Frères | Method for machining profiles or frames for the fabrication of door frames or similar |
| EP1559501A3 (en) * | 2004-01-06 | 2006-04-12 | Ambonati Frères | Method for machining profiles or frames for the fabrication of door frames or similar |
| CN108340134A (en) * | 2018-02-11 | 2018-07-31 | 安徽省蒙城县金鹏建材装饰有限公司 | A kind of alloy window processing unit (plant) |
| CN108955047A (en) * | 2018-07-10 | 2018-12-07 | 安徽省星年华电器有限公司 | A kind of seal strip for refrigerator door assembling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| BE1003801A7 (en) | 1992-06-16 |
| GB2263127B (en) | 1995-03-08 |
| GB9200140D0 (en) | 1992-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20120105 |