GB2192722A - A device for the automatic determination of parameters of textile test goods, such as threads, roves and ribbons - Google Patents
A device for the automatic determination of parameters of textile test goods, such as threads, roves and ribbons Download PDFInfo
- Publication number
- GB2192722A GB2192722A GB08714060A GB8714060A GB2192722A GB 2192722 A GB2192722 A GB 2192722A GB 08714060 A GB08714060 A GB 08714060A GB 8714060 A GB8714060 A GB 8714060A GB 2192722 A GB2192722 A GB 2192722A
- Authority
- GB
- United Kingdom
- Prior art keywords
- measuring
- module
- determination
- guide
- measuring unit
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 239000004753 textile Substances 0.000 title claims description 11
- 238000011156 evaluation Methods 0.000 claims abstract description 20
- 206010020112 Hirsutism Diseases 0.000 claims abstract description 14
- 210000000056 organ Anatomy 0.000 claims description 32
- 239000000835 fiber Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000011161 development Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012956 testing procedure Methods 0.000 description 2
- 235000001418 Echinochloa stagnina Nutrition 0.000 description 1
- 240000001327 Echinochloa stagnina Species 0.000 description 1
- 235000001797 Lavandula macra Nutrition 0.000 description 1
- 235000001803 Lavandula setifera Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010252 digital analysis Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001429 stepping effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/365—Filiform textiles, e.g. yarns
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Textile Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Treatment Of Fiber Materials (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The device contains a measuring unit (1), containing a measuring sensor (15), a guide device (14) and an automatic advance (16) for the test goods (P), an evaluation unit (2) and an output unit (3). The measuring unit (1) has a modular assembly, wherein a separate module (5,4,6) is provided for the measuring sensor (15), for the guide device (14) and for the automatic advance (16), and these modules can be assembled into a measuring unit (1) in any order, being held in place by frame 11. More than one measuring sensor may be incorporated in the measuring unit 1, for example a capacitive evenness sensor and a hairiness sensor may be mounted between the guide and automatic advance units. <IMAGE>
Description
SPECIFICATION
Device for the automatic determination of parameters of textile test goods, such as threads, roves and ribbons
The invention relates to a device for the automatic determination of parameters of textile test goods, such as threads, roves and ribbons, with a measuring unit containing a measuring organ and a guide device as well as an automatic advance for the test goods, with an evaluation unit and with an output unit for the parameters yielded.
In the laboratories of textile works, especially of spinning mills, random checks for the determination of certain textile parameters, such as for example mass variations, hairiness, textile strength, fineness, twisting etc are undertaken within the framework of operational quality control. So-called evenness testers, such as those for example sold worldwide by the applicant of the present patent application under the name USTER TESTER (USTER registered trade mark of Zellweger
Uster AG), serve for the determination of the mass variations.
The evenness testers are identical for staple fibre threads and filament threads in respect of evaluation and output units, yet different in respect of the measuring unit. Wherein not only the measuring organ, which is for example a capacitive measuring organ, is different, but also the automatic advance, in respect of-the thread run, is arranged, in the case of staple fibre threads, after, and in the case of filament threads, before the measuring organ. Further, an additional special suction nozzle is required for evenness testers for filament threads, which provides the thread with the twist required for testing. This leads to the necessity of differing measuring units for filament threads and staple fibre threads, which is disadvantageous both for the manufacturer of the machine and for its user.
By means of a preferred embodiment of the invention, a device of the kind mentioned in the introduction is to be given which avoids this dual character and no longer requires a specialised measuring unit for filament and staple fibre threads.
This object is solved according to a preferred embodiment of the invention in that the measuring unit comprises a modular construction, wherein a separate module is provided for the measuring organ, for the guide device and for the automatic advance, and these modules may be assembled into a measuring unit in any sequence.
By means of the modular construction of the measuring unit according to the invention, onthe one hand, the module required can be assembled into the measuring unit required by the appliance manufacturer. On the other hand, different measuring units no longer need to be produced, and, the customer no longer needs to buy different measuring units-with multiply present identical functional stages-but only needs the required module; which he can assemble himself according to his wishes and suited to the hardware.
If another parameter is now to be measured besides the mass variations, for example hairiness, then a second device will be needed, and two test procedures are required. In that case the evaluation of the signals of the measuring unit in the evaluation unit is very similar, and in the case of digital signal processing the materials required are reduced, for example, to an additional printed circuit for the evaluation unit, so that a common evaluation and output unit can be used for the determination of the mass variations and airiness, to which the various measuring units are connected. If the signal processing does not occur simultaneously in the evaluation unit, but in sequence, then no additional printed circuit board is required.
A preferred further development of the device according to the invention relates to a further simplification of the last-named application of the determination of various parameters of the test goods.
This further development is characterised in that at least two modularly assembled measuring organs for the determination of various parameters of the test goods are- arranged in the test goods through run. The system is essentially planned so that the signals front three measuring organs can be simultaneously processed and a development to more than three measuring organs is possible.
In the following, the invention will be more closely represented by means of an embodi- ment and the diagrams, in which;
Fig. 1 shows a perspective representation of an evenness tester of the determination of the mass variations of staple fibre threads,
Fig. 2 shows a variant of the test device of
Fig. 1 with a measuring unit for the determination of the mass variations and hairiness of staple fibre threads, and
Fig. 3 shows a variant of the test device of
Fig. 1 with a measuring unit for the determination of the mass variations of filament threads.
The evenness tester represented in Fig. 1 of the determination of the mass variations of textile test goods, such as threads, roves or ribbons, of staple fibres, consists according to the representation of a measuring unit 1, of an evaluation unit 2, of an output unit 3 and of a frame 13 for the units making-up with the test goods, which are for example thread or rove spools.
The measuring unit 1 for the test goods represented bythe reference symbol P consists according to the invention of several mo- dules, which are arranged in the running direction of the test goods P, that is from top to
bottom in the figure, as follows; first, a mo
dule 4 is arranged with a thread guide device
14, for example a thread brake, then a module 5 with a measuring organ 15, then a module
6 within automatic advance 16 and then a
module 7 with a suction nozzle 17. The low eft module 7 is set upon a base 10 and all
named modules 4, 5, 6 and 7 and the base
10 are arranged in a frame 11 and held by the latter. The frame 11 comprises a bow-like
upper part 19.
The measuring organ 15, through which the test goods P are drawn through an automatic
advance 16 formed by a roller pair, is- a so
called capacitive measuring organ. This is de
scribed in US Patents 3 754 172, 3 758 138
and 3 805 607, to whose publication referpence is hereby explicitly made.-The automatic advance 16 and the suction nozzle 17 are
known from the USTER TESTER already
named and- will not be more closely described
here.
Evaluation unit 2 contains among other th
ings an analogue/digital convertor and- a com
puter and is combined with a screen 12 according to the representation. The electrical
signals continuously drawn from the measuring
organ 15 are. processed by the computer and
stored in a suitable form in a memory inte
grated in the evaluation unit 2-, and can be
represented on the screen 12 before being
printed on the printer forming the output unit
3. This has the advantage that all data obtained can be brought into view on the screen
12, and only selected data can be specified for printing on the printer 3.
It is also to be noted that the signal- pro
cessing in the evaluation unit 2 consists of
two main components, namely of the spectro
graph, for the so-called spectrogram (wave
length spectrum of the mass variations), of
the imperfection indicator, which counts step
pings over of the limit value of the mass, and
of the actual evaluatjon unit for the determination of the so-calledvariation coefficient andthe length variation curves. All these para
meters are known from the USTER TESTER
already mentioned. The more detailed con
struction of the evalution unit is, however, not
essential to the present invention, especially
when one considers that the relevant function
is discerned in the case of digital analysis and
evaluation by a single printed circuit board.
If now a further parameter is-to be deter
mined besides the mass variations of the test
goods P, for example its hairiness, then a se
parate device with a measuring, an evaluation
and an output unit had previously to be used and thereby two complete measuring devices and two testing procedures were needed.
Even if it is least conceivable to connect the two measuring units needed to a common evaluation and -output unit, then this still requires two measuring units and two testing -
procedures. T.hese disadvantages no longer exists in the measuring unit 1' represented in
Fig. 2.
According to Fig. 2 a single measuring unit 1' is used for testing the mass variations and hairiness of the test goods P, which is possible thanks to the modular construction of the measuring unit described by means of Fig.
1. In this combined measuring unit 1' for testing the mass variations and hairiness, a module 8 with a measuring organ 18 for the hairiness of the test goods P is arranged between the module 4 with the thread guide device 14 and the module 5 with the measuring organ 15, compared to the measuring unit 1 of Fig. 1. The measuring organ 18 will not be more closely described here: the reader is referred in this connection to the article "Yarn hairiness" by A.Barella in Textile Progress
Volume 13, No. 1, The Textile Institute, and to the CH-Patent Application No. 05 370/55-0 of the applicant of the present patent application.
The evaluation and analysis of the signals of the measuring organ 18 is very similar to that of the measuring organ 15 and can be analogue or digital. The signal processing of both the measuring organs 15 and 18 in the evaluation unit 2 (Fig. 1) can take place either in Time sharing (time-division multiplex process), or the evaluation unit 2 (Fig. 1) can be equipped with one assembly of printed circuit boards for each measuring organ. Only a single control function is necessary.
The additional module 8 can be housed without problems in the frame 11, by taking out the upper part of the bow 19 (Fig. 1) and replacing it by a higher upper part of the bow 19'. The frame 11 could also be developed to be adjustable or varied large frames could be used. The base 10 contains the electronics of the measuring unit 1 and is identical in all embodiments.
Fig. 3 shows the measuring unit 1" of a test device for the determination of the mass variations of filament threads. This differs from the test device for staple fibre threads represented in Fig. 1 in three ways;
-another measuring organ 15' is needed.
However this is also a capacitive measuring organ.
-the automatic advance 16 must be arranged in the running line of the test goods P in front of the measuring organ 15'.
-a special suction nozzle 19 is needed, which provides the filament thread with the twist required for the tests. The reader is referred to the US Patent NO. 3 951 321 in relation to this suction nozzle.
According to Fig. 3 these requirements can be fulfilled in a simple manner by the modular assembly of the measuring unit 1". According to the representation, the measuring unit 1" consists of four modules, which are arranged in the running direction of the test goods P in the following order: module 4 with thread guide device 14, module 6 with automatic advance 16, module 5' with measuring organ 15', module 9 with suction nozzle 19.
Below the lowest module 9, the base 10 is provided as in Fig. 1 and 2, which, together with the various modules, is arranged in a frame 11. The modular assembly of the measuring unit 1, 1', 1" described allows any combination of kind and sequence of the modules and thereby makes possible on the one hand a production of the apparatus required, because several test devices are no longer required, but by means of various modules the measuring unit of a single test device can be simply fitted to changing requirements, and on the other hand a reduction of the time required, because several measurements can be carried out in a single test process. If in the present description only one measuring organ for the mass variations-and one for hairiness is referred to, of course further modules with measuring organs for the most various parameters can be used. The reader is referred in relation to this for example to the mean determination of fineness and ofthe variation coefficent of fineness according to DE OS 34 02 181 (US Patent Application Serial No. 671 411).
Claims (11)
1. Device for the automatic determination of parameters of textile goods, such as threads, roves and ribbons, with a measuring unit containing a measuring organ and a guide device, and automatic advance for the test goods, with an evaluation unit and with an output unit for the parameters yielded, characterised the measuring unit comprises a modular construction and wherein a separate module is provided for each of the measuring organs for the the guide- device and for the automatic advance and,these nodules may be assembled in any order into a measuring unit.
2. Device according to claim 1, wherein at least two modularly assembled'measuring organs for the determination of various parameters of the test goods are arranged in the test goods through run.
3. Device according to claim 2, wherein the evaluation unit for each of the measuring organs comprises a separate signal processing step, preferably a printed circuit board or a printed circuit board assembly.
4. Device according to claim 1 or 2, wherein the measuring unit comprises a further module with a first suction nozzle for the test goods.
5. Device according to claim 4, wherein the various modules are held interchangeably in a bow-like frame.
6. Device according to claim 5, wherein a base, exchangeable with a further module, may be held-in the frame if required.
7. Device according to claims 1 and 5, wherein the measuring unit comprises the following modules in use for the determination of the weight variations of threads, roves and ribbons of staple fibres in the running direction of the test goods; a guide module with the guide device, a measuring module with the measuring organ, an advance module with the automatic advance and a suction module with the first suction nozzle.
8. Device according to claims 1 and 5, wherein the measuring unit comprises the following modules in use for the determination of the hairiness of the test goods in its running direction: a guide module with the guide device, a measuring module with the measuring organ for hairiness, an advance module with the automatic advance and a suction mo duie with the first suction module.
9. Device according to claims 2, 7 and 8, wherein the measuring unit is provided with the measuring module for hairiness and with the measuring module for mass variations, between the guide module and the advance module in use for the determination of the mass variations and hairiness of staple fibre threads.
10. Device according to claims 1 and 5, whererin the measuring unit comprises the following modules in use for the determination of the mass variations of filament threads in the running direction of the test goods; a guide module with the guide device, an advance module with the automatic advance, a measuring module with the measuring organ and a suction-and-twist module with a second suction nozzle, which provides the test goods with the twist required for testing.
11. A device for the automatic determination of parameters of textile goods substantially as herein described and as illustrated in the accompånying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2823/86A CH671105A5 (en) | 1986-07-15 | 1986-07-15 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8714060D0 GB8714060D0 (en) | 1987-07-22 |
| GB2192722A true GB2192722A (en) | 1988-01-20 |
| GB2192722B GB2192722B (en) | 1990-11-14 |
Family
ID=4242400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8714060A Expired - Fee Related GB2192722B (en) | 1986-07-15 | 1987-06-16 | Device for the automatic determination of parameters of textile test material such as threads, rovings and slivers |
Country Status (9)
| Country | Link |
|---|---|
| KR (1) | KR960016165B1 (en) |
| CN (1) | CN1012323B (en) |
| BE (1) | BE1001253A4 (en) |
| CH (1) | CH671105A5 (en) |
| DE (1) | DE8708187U1 (en) |
| ES (1) | ES2007644A6 (en) |
| FR (1) | FR2601780B1 (en) |
| GB (1) | GB2192722B (en) |
| IN (1) | IN168699B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025660A (en) * | 1987-10-06 | 1991-06-25 | Zellweger Uster Ag | Apparatus and method for the automatic determination of the count of a textile test sample |
| US5654554A (en) * | 1994-11-29 | 1997-08-05 | Zellweger Luwa Ag | Method and apparatus for the recording of properties on elongate bodies |
| US5671061A (en) * | 1992-06-18 | 1997-09-23 | Zellweger Luwa Ag | Method and apparatus for assessing the effect of yarn faults on woven or knitted fabrics |
| US5956994A (en) * | 1997-05-20 | 1999-09-28 | Zellweger Luwa Ag | Test apparatus for linear test material such as yarn or the like |
| US6065333A (en) * | 1995-09-06 | 2000-05-23 | Zellweger Luwa Ag | Device for monitoring a moving yarn |
| CN103592427A (en) * | 2005-11-18 | 2014-02-19 | 乌斯特技术股份公司 | Method for characterising effect yarn |
| CN104569358A (en) * | 2014-12-30 | 2015-04-29 | 南方寝饰科技有限公司 | Cloth inspecting machine with cloth surface hole detection function |
| WO2016149840A1 (en) | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular thread testing device |
| WO2016149838A1 (en) | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular yarn tester |
| WO2016149839A1 (en) * | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular yarn tester |
| WO2016149842A1 (en) * | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Electrode assembly for capacitively testing an elongated textile material |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4025899C2 (en) * | 1990-08-16 | 2000-06-08 | Rieter Ag Maschf | Method and device for determining the uniformity of a test material from textile yarns |
| AU2003200850A1 (en) * | 2003-01-08 | 2004-08-10 | Premier Polytronics Pvt. Ltd. | Measuring and testing continuous elongated textile material |
| CN101130924B (en) * | 2007-08-07 | 2010-09-29 | 深圳联达钮扣有限公司 | Mesh-belt checking machine |
| CN101408535B (en) * | 2008-10-28 | 2012-06-27 | 天津工业大学 | Intelligent apparatus for on-line detecting cotton bar evenness |
| CN107589243A (en) * | 2017-08-26 | 2018-01-16 | 深圳市云菲网络科技有限公司 | A kind of measuring instrument for detecting fabric parameter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH531719A (en) * | 1970-08-04 | 1972-12-15 | Zellweger Uster Ag | Method for manufacturing a measuring electrode |
| CH519716A (en) * | 1970-08-04 | 1972-02-29 | Zellweger Uster Ag | Textile testing device |
| US3805607A (en) * | 1971-08-27 | 1974-04-23 | Zellweger Uster Ag | Yarn changing mechanism |
| CH563303A5 (en) * | 1973-09-26 | 1975-06-30 | Zellweger Uster Ag | |
| DE2363771A1 (en) * | 1973-12-21 | 1975-06-26 | Zinser Textilmaschinen Gmbh | Linear densitometer for textiles - has feeding device separator balance and an evaluator |
| FR2549096B1 (en) * | 1983-06-21 | 1985-11-08 | Superba Sa | METHOD FOR THE AUTOMATIC CONTROL OF TEXTILE THREADS AND APPARATUS FOR CARRYING OUT SAID METHOD |
| CH663427A5 (en) * | 1983-12-14 | 1987-12-15 | Zellweger Uster Ag | METHOD AND DEVICE FOR DETERMINING THE MEDIUM FINENESS AND THE VARIATION COEFFICIENT OF THE FINE DETERMINATIONS OF TEXTILES AND TECHNICAL SPINES. |
-
1986
- 1986-07-15 CH CH2823/86A patent/CH671105A5/de not_active IP Right Cessation
-
1987
- 1987-06-10 DE DE8708187U patent/DE8708187U1/en not_active Expired
- 1987-06-16 GB GB8714060A patent/GB2192722B/en not_active Expired - Fee Related
- 1987-06-22 IN IN449/MAS/87A patent/IN168699B/en unknown
- 1987-06-29 KR KR1019870006633A patent/KR960016165B1/en not_active IP Right Cessation
- 1987-07-10 FR FR878709881A patent/FR2601780B1/en not_active Expired - Lifetime
- 1987-07-13 BE BE8700768A patent/BE1001253A4/en not_active IP Right Cessation
- 1987-07-13 ES ES8702061A patent/ES2007644A6/en not_active Expired
- 1987-07-15 CN CN87104921A patent/CN1012323B/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025660A (en) * | 1987-10-06 | 1991-06-25 | Zellweger Uster Ag | Apparatus and method for the automatic determination of the count of a textile test sample |
| US5671061A (en) * | 1992-06-18 | 1997-09-23 | Zellweger Luwa Ag | Method and apparatus for assessing the effect of yarn faults on woven or knitted fabrics |
| US5654554A (en) * | 1994-11-29 | 1997-08-05 | Zellweger Luwa Ag | Method and apparatus for the recording of properties on elongate bodies |
| US6065333A (en) * | 1995-09-06 | 2000-05-23 | Zellweger Luwa Ag | Device for monitoring a moving yarn |
| US5956994A (en) * | 1997-05-20 | 1999-09-28 | Zellweger Luwa Ag | Test apparatus for linear test material such as yarn or the like |
| CN103592427B (en) * | 2005-11-18 | 2017-04-26 | 乌斯特技术股份公司 | Method for characterising effect yarn |
| CN103592427A (en) * | 2005-11-18 | 2014-02-19 | 乌斯特技术股份公司 | Method for characterising effect yarn |
| CN104569358A (en) * | 2014-12-30 | 2015-04-29 | 南方寝饰科技有限公司 | Cloth inspecting machine with cloth surface hole detection function |
| CN104569358B (en) * | 2014-12-30 | 2016-07-13 | 南方寝饰科技有限公司 | A kind of cloth inspecting machine with cloth cover broken hole automatic detection function |
| WO2016149840A1 (en) | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular thread testing device |
| WO2016149838A1 (en) | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular yarn tester |
| WO2016149839A1 (en) * | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Modular yarn tester |
| WO2016149842A1 (en) * | 2015-03-20 | 2016-09-29 | Uster Technologies Ag | Electrode assembly for capacitively testing an elongated textile material |
| EP3161476B1 (en) | 2015-03-20 | 2017-11-15 | Uster Technologies AG | Modular yarn tester |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2601780A1 (en) | 1988-01-22 |
| FR2601780B1 (en) | 1990-06-08 |
| BE1001253A4 (en) | 1989-09-05 |
| KR960016165B1 (en) | 1996-12-04 |
| ES2007644A6 (en) | 1989-07-01 |
| CN87104921A (en) | 1988-01-27 |
| KR880002008A (en) | 1988-04-28 |
| IN168699B (en) | 1991-05-18 |
| DE8708187U1 (en) | 1987-07-30 |
| GB8714060D0 (en) | 1987-07-22 |
| GB2192722B (en) | 1990-11-14 |
| CN1012323B (en) | 1991-04-10 |
| CH671105A5 (en) | 1989-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950616 |