CN203587462U - Device for measuring anti-mildew time of tobacco shred and auxiliary material in cigarette pack - Google Patents
Device for measuring anti-mildew time of tobacco shred and auxiliary material in cigarette pack Download PDFInfo
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- CN203587462U CN203587462U CN201320530170.1U CN201320530170U CN203587462U CN 203587462 U CN203587462 U CN 203587462U CN 201320530170 U CN201320530170 U CN 201320530170U CN 203587462 U CN203587462 U CN 203587462U
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- tobacco bale
- time
- climatic chamber
- auxiliary material
- mouldy
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Abstract
The utility model relates to a device for measuring the anti-mildew time of tobacco shred and auxiliary material in a cigarette pack. The device comprises a constant temperature/humidity chamber, weighing equipment and control equipment, wherein the constant temperature/humidity chamber is used for placing a sample cigarette pack; the weighing equipment is used for measuring the weight of the sample cigarette pack, and the measured weight value is input into the control equipment; the control equipment is used for recording the weight value of the sample cigarette pack and the measurement time point corresponding to the weight value, and generating a corresponding relation between time and weight so as to determine the time corresponding to the highest point in the corresponding relation as the anti-mildew time of the tobacco shred and auxiliary material in the sample cigarette pack. The device provided by the utility model can objectively identify whether the cigarette is mildewed, and can accurately measure the anti-mildew time of the tobacco shred and auxiliary material in the cigarette pack.
Description
Technical field
The utility model relates to the automation control area that grows tobacco, and relates in particular to the measurement mechanism of pipe tobacco and the anti-mouldy time of auxiliary material in a kind of cigarette tobacco bale.
Background technology
Tobacco bale is comprised of plastic sheeting, cigarette-brand paper, aluminium film paper, cork paper, cigarette paper, forming paper, filter stick and pipe tobacco conventionally.The experimental technique of the time that existing investigation cigarette goes mouldy is: get a collection of similar sample,, with a collection of pipe tobacco, with a collection of cigarette auxiliary material, same board produce, same environmental baseline and same other sample of class, put into hot and humid climatic chamber, to estimation cigarette-opening start mildew become time, from climatic chamber, take out tobacco bale, strip off tobacco bale, with soon, the method for nasil and suction distinguishes that whether cigarette goes mouldy, and calculates the time that cigarette goes mouldy thus.
But, because people's sense of smell and the sense of taste are subject to many-sided impact, often can produce deviation.In real work, often encounter the situation of two kinds of cigarette impalpables that go mouldy: the one, high-grade cigarette starts to go mouldy but when obviously going mouldy, is difficult to judgement.Under normal circumstances, if smell high-grade cigarette, there is saccharic acid taste, illustrate and start to have gone mouldy; The 2nd, blue foreign smell and the stale of Low-end Cigarettes mix, and are more difficult to determine whether to go mouldy.
Improve and distinguish the accuracy whether cigarette goes mouldy, mainly contain following several way: 1, wiping differential method: the white point on pipe tobacco or offal is judged to not timing, after the wet water of available cotton swab, then water is wrung out to wiping white point, if mildew can be wiped; If wiped, not going, may be the white point of overflow or tobacco leaf, the residual wound of offal.2, pipe tobacco is positioned under 10 times of magnifieres with without mould pipe tobacco controlled observation, the fine hair going mouldy on pipe tobacco is than much more without the pipe tobacco that goes mouldy, look dark, gloss is also poor.3, mouldy pipe tobacco is put into biology microscope Microscopic observation, can be clear that mould mycelium.
This shows, there is following problem in the measuring method of the time that current cigarette goes mouldy:
Whether 1, laboratory sample is not same sample, because pipe tobacco in tobacco bale and auxiliary material are packaged in plastic sheeting, label paper, go mouldy and cannot intuitively distinguish, needs just can distinguish after strip off; When after sample strip off, this sample just cannot be proceeded experiment, and need to choose to this sample, with a collection of similar sample, continues experiment.
2, cigarette goes mouldy in early days, distinguishes difficulty, need to, by instruments such as magnifier, biological microscopes, simultaneously because people's vision, sense of smell, the sense of taste are subject to many-sided impact, often produce deviation.
3, the time measurement that cigarette goes mouldy is inaccurate, and cigarette is because special reason is gone mouldy for a long time, but it goes mouldy and be just stripped and check long after, the time generation error that causes cigarette to go mouldy.
Utility model content
The purpose of this utility model is the measurement mechanism that proposes the interior pipe tobacco of a kind of cigarette tobacco bale and the anti-mouldy time of auxiliary material, and it can distinguish whether cigarette goes mouldy objectively, and can record exactly pipe tobacco and the anti-mouldy time of auxiliary material in cigarette tobacco bale.
For achieving the above object, the utility model provides following technical scheme:
A measurement mechanism for pipe tobacco and the anti-mouldy time of auxiliary material in cigarette tobacco bale, it comprises climatic chamber, weighing-appliance and opertaing device, wherein: described climatic chamber is used for placing sample tobacco bale; Described weighing-appliance is for measuring the weight of sample tobacco bale, and this weight measurement is inputted described opertaing device; Described opertaing device is for recording gravimetric value and the corresponding Measuring Time point of this gravimetric value of sample tobacco bale, and generate the corresponding relation of one group of time and weight, to determine corresponding time of peak pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale in this corresponding relation.
Further, also comprise pallet, gland bonnet, jacking equipment and the driving arrangement of placing sample tobacco bale, wherein: the bottom of described climatic chamber offers a through hole; Described pallet is arranged in described climatic chamber; The top of described jacking equipment is fixedly connected with the bottom surface of described pallet through described through hole; Described gland bonnet is fixedly connected on described jacking equipment middle part; Described driving arrangement is electrically connected with described opertaing device, the work order of sending for receiving described opertaing device, and drive described jacking equipment to carry out elevating movement according to this work order; Under unmeasured state, described jacking equipment is in most significant digit, and described gland bonnet is sticked in the described through hole bottom surface of described climatic chamber, and making described climatic chamber is confined space; Under measuring state, described jacking equipment is in lowest order, and the bottom of described jacking equipment is placed on described weighing-appliance completely.
Further, described weighing-appliance be ten thousand/ electronic balance.
Further, the Temperature Setting of described climatic chamber is within the scope of 25 ℃-50 ℃, and humidity is set within the scope of 65-95%RH.
Based on the arbitrary technical scheme in technique scheme, the utility model embodiment at least can produce following technique effect:
Because the utility model is put into sample tobacco bale the closed environment of a constant temperature and humidity, and in the weight in the stage of making moist, can become gradually heavy according to pipe tobacco in tobacco bale and auxiliary material, the feature that can lighten gradually in the weight in the stage of going mouldy, the weight of sample tobacco bale is detected and record, and generated the corresponding relation of time and weight, then the corresponding relation of time directly perceived and weight just can determine that the peak of the corresponding relation of time and weight is pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale, therefore the method for distinguishing whether pipe tobacco and auxiliary material go mouldy in tobacco bale provided by the utility model is simple and clear, as long as the weight of tobacco bale is from becoming gradually heavy, the time of using to the flex point lightening gradually, it is the time that the interior pipe tobacco of cigarette tobacco bale and auxiliary material anti-mildew become, and, the time accuracy that in measurement tobacco bale, pipe tobacco and auxiliary material go mouldy is improved.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle schematic of measurement mechanism one embodiment of the interior pipe tobacco of the utility model cigarette tobacco bale and the anti-mouldy time of auxiliary material;
Fig. 2 is the principle schematic of another embodiment of measurement mechanism of the interior pipe tobacco of the utility model cigarette tobacco bale and the anti-mouldy time of auxiliary material;
Fig. 3 is the structural representation of measurement mechanism one embodiment of the interior pipe tobacco of cigarette tobacco bale of the present invention and the anti-mouldy time of auxiliary material;
Fig. 4 is the view of installing in Fig. 3 when unmeasured;
Fig. 5 is view during measurement device in Fig. 3;
Fig. 6 is the structural representation of the embodiment that in Fig. 3, horizontal connecting plate matches with movable cross.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
The process that in cigarette tobacco bale, pipe tobacco and auxiliary material go mouldy substantially can be divided into and make moist, generates heat and the three phases that goes mouldy, and introduces one by one the situation of this three phases cigarette tobacco bale below.
Make moist the stage: when the relative humidity of air becomes large, the air pressure of air is larger than the air pressure in tobacco bale, air can penetrate in tobacco bale, and airborne moisture is absorbed by pipe tobacco in tobacco bale and auxiliary material, and the weight of tobacco bale is increased.When the environment in cigarette meets fungus growth breeding needs, can cause and go mouldy.
The heating stage: after pipe tobacco and auxiliary material water suction are made moist in cigarette, due to the expanded heat producing, cigarette temperature is raise, pipe tobacco darkens, and fragrance significantly declines, and produces the condition of fungus growth, the mobility of the enzyme in pipe tobacco increases, and temperature is higher, and mold propagates is faster.Make the air pressure in tobacco bale increase simultaneously.
Go mouldy the stage: because the air pressure in climatic chamber is fixed, when pipe tobacco in cigarette and auxiliary material go mouldy, it can produce gas on the one hand, when making the air pressure in tobacco bale, the gas increasing gradually becomes gradually large, and when the air pressure in tobacco bale is greater than the air pressure of generation of climatic chamber, gas in tobacco bale is just discharged tobacco bale, takes away moisture in gas simultaneously; On the other hand, lasting chemical reaction lightens tobacco bale gradually.
According to the variation of the caused tobacco bale weight of three phases that in cigarette tobacco bale, pipe tobacco and auxiliary material go mouldy, in cigarette tobacco bale provided by the utility model, the measuring method of pipe tobacco and the anti-mouldy time of auxiliary material comprises the following steps:
1) sample tobacco bale is placed in to the confined space of a constant temperature and humidity, and this time of inserting is started to timing as initial time.
As a specific implementation of step 1), adopt the confined space of a climatic chamber as the constant temperature and humidity needing in this step.This climatic chamber can be for directly to purchase and to obtain from market.By this climatic chamber, produce a hot and humid constant environmental baseline, particularly, by the Temperature Setting in this climatic chamber, in the scope of 25-50 ℃, humidity is set in the scope of 65-95%RH.
Select the reason of this temperature and humidity scope to be: the chances are for the range of control of existing climatic chamber temperature (10-60) ℃, the chances are for the range of control of humidity (10-95) %RH, and tobacco bale producing, store, in the process of consumption, temperature, humidity are also substantially in the scope of climatic chamber control; Tobacco bale presents dynamic balance in 22 ± 2 ℃, the scope of 60 ± 5%RH, and the weight of tobacco bale neither increases also and do not reduce; It is also micro-having increase or reducing.Therefore in wanting in tobacco bale, pipe tobacco and auxiliary material go mouldy, and Temperature Setting must be greater than to 25 ℃, and humidity is set and is greater than 65%RH.Preferably, the design temperature while going mouldy experiment is 32 ℃, and setting humidity is 75%RH, i.e. intermediateness.
When sample tobacco bale is put in hot and humid climatic chamber, start the clock.
2) in the set time of real-time or every day, the weight of sample tobacco bale is measured and record.
As step 2) a specific implementation, adopt ten thousand/ electronic balance as weighing-appliance, sample tobacco bale is weighed.Utilize ten thousand/ electronic balance tobacco bale is measured, heavy if the weight of tobacco bale continues to become, illustrate in tobacco bale that pipe tobacco and auxiliary material do not go mouldy, and can proceed tobacco bale to test in climatic chamber.
Under normal circumstances, in tobacco bale, pipe tobacco and auxiliary material moisture are probably between 11.5%-13.5%RH scope, and the air pressure in tobacco bale is lower than the air pressure of hot and humid aqueous vapor, and therefore, the aqueous vapor in constant temperature and humidity confined space can be infiltrated tobacco bale, and the weight of tobacco bale is increased.And the interior pipe tobacco of cigarette tobacco bale and auxiliary material make moist after heating, from temperature humidity aspect, be that a suitable condition has been created in fungus growth breeding: sufficient nutriment, moisture, temperature; Mould just starts growth on pipe tobacco, breeding.Entered after the stage of going mouldy, occurred the mycelium of mould on two terminal filaments of cigarette, color is turned white, be fine hair shape, cigarette fragrance scatters and disappears, and sends sour stale, when the air pressure of the sour stale generation of sending and the air pressure balance that climatic chamber produces, the weight of tobacco bale no longer increases.Along with the increase of sour stale generation, when the air pressure of sour stale in tobacco bale is greater than the air pressure of climatic chamber generation, in tobacco bale, sour stale is discharged in climatic chamber, take away moisture in tobacco bale simultaneously, the weight of tobacco bale is lightened, cigarette goes mouldy simultaneously, produces chemical reaction, causes pipe tobacco weight to lighten.
3) according to step 2) in the weight data that detects, generate the corresponding relation of one group of Measuring Time point and weight, and the corresponding time of peak in this corresponding relation determined is pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale in step 1).
If step 2) in be in real time the weight of tobacco bale to be detected and recorded, the corresponding relation of time and weight is a continuous curve, and, because tobacco bale can become heavy gradually in the weight in the stage of making moist, weight in the stage of going mouldy can lighten gradually, therefore, the time generating in step 3) with the corresponding curve of weight should be: the curve in the stage of making moist rises gradually, and decline gradually at the curve in the stage of going mouldy, therefore, the peak of curve, flex point is just pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale.
If step 2) in the set time of every day, the weight of tobacco bale is detected and is recorded, the corresponding relation of time and weight is discrete some signal, but, similarly, the peak in the corresponding relation of time and weight remains pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale.
This shows, distinguish that the method that whether pipe tobacco and auxiliary material go mouldy in tobacco bale is simple and clear, as long as the weight of tobacco bale is from becoming gradually heavy, the time of using to the flex point lightening gradually, it is the time that the interior pipe tobacco of cigarette tobacco bale and auxiliary material anti-mildew become, and the time accuracy that in measurement tobacco bale, pipe tobacco and auxiliary material go mouldy is improved.
As shown in Figure 1, the utility model also provides a kind of interior pipe tobacco of cigarette tobacco bale of method in the various embodiments described above and measurement mechanism of the anti-mouldy time of auxiliary material realized, comprise climatic chamber 1, weighing-appliance 2 and opertaing device 3, the confined space of constant temperature and humidity wherein: climatic chamber 1 is for placing sample tobacco bale A, is provided for sample tobacco bale A.The Temperature Setting of climatic chamber 1 is within the scope of 25 ℃-50 ℃, and humidity is set within the scope of 65-95%RH.Preferably, the design temperature while going mouldy experiment is 32 ℃, and setting humidity is 75%RH.
Weighing-appliance 2 is for measuring the weight of sample tobacco bale, and by this weight measurement input control apparatus 3.In the present embodiment, weighing-appliance 2 adopts is ten thousand/ electronic balance, ten thousand/ electronic balance to have the precision of measurement high, the advantage that measurement performance is stable.
Opertaing device 3 is for recording gravimetric value and the corresponding Measuring Time point of this gravimetric value of sample tobacco bale, and generate the corresponding relation of one group of time and weight, to determine corresponding time of peak pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale in this corresponding relation.In the present embodiment, opertaing device 3 can adopt existing Realization of Product, is not described in detail in this.
As in Figure 2-4, in above-described embodiment, in cigarette tobacco bale provided by the utility model, the measurement mechanism of pipe tobacco and the anti-mouldy time of auxiliary material also comprises pallet 4, gland bonnet 5, jacking equipment 6 and the driving arrangement 7 of placing sample tobacco bale, wherein: the bottom of climatic chamber 1 offers a through hole 8, and pallet 4 is arranged in climatic chamber 1.The top of jacking equipment 6 is fixedly connected with the bottom surface of pallet 4 through through hole 8.
Under unmeasured state, jacking equipment 6 is in most significant digit, and gland bonnet 5 is sticked in through hole 8 bottom surfaces of climatic chamber 1, and making climatic chamber 1 is a complete airtight space.Under measuring state, jacking equipment 6 is in lowest order, and the bottom of jacking equipment 6 is placed on weighing-appliance 2 completely.In use procedure, in the situation that not placing sample tobacco bale, first jacking equipment 6 is down to lowest part, the bottom of jacking equipment 6 is placed on weighing-appliance 2 completely, the gravimetric value M0 that now the measured gravimetric value obtaining of weighing-appliance 2 is jacking equipment 6, therefore, measures at placement sample tobacco bale the common weight that measured gravimetric value M1 is jacking equipment 6 and sample tobacco bale, therefore, the gravimetric value of sample tobacco bale is actually M1-M0.
As a kind of implementation of jacking equipment 6, as shown in Fig. 3-6, jacking equipment 6 comprises vertical driving member 61, horizontal connecting plate 62, movable cross 63 and slide block 64.Wherein, vertical driving member 61 is vertical shaft-like or club shaped structures that arrange, its top end face is fixedly connected with the bottom surface of pallet 4 through through hole 8, its middle part is set with gland bonnet 5, therefore, in through hole 8 bottom surfaces that gland bonnet 5 is sticked at climatic chamber 1, climatic chamber 1 is a complete airtight space.As shown in Figure 3, the bore of through hole 8 reduces from top to bottom gradually, therewith matchingly, gland bonnet 5 has a fastening part 51 that diameter reduces gradually from top to bottom, when gland bonnet 5 moves straight up, fastening part 51 tapered configuration lucky and through hole 8 matches, and with O-ring seal 52 actings in conjunction, further climatic chamber 1 is sealed.
The bottom order of vertical driving member 61 is fixedly connected with convergent part C and block structure D, and the size of convergent part C reduces from top to bottom gradually.Therewith matchingly, offer a convergent hole E on the horizontal connecting plate 62 under block structure D, the size of convergent hole E reduces from top to bottom gradually.Convergent part C can be connected with convergent hole E coupling just.
As shown in Figure 4, in unmeasured situation, gland bonnet 5 is sticked in through hole 8 bottom surfaces of climatic chamber 1, pallet 4, vertical driving member 61, convergent part C and block structure D are one-piece constructions, block structure D is positioned at the convergent hole E below of horizontal connecting plate 62, due to the effect of friction force and the version of convergent between convergent part C and horizontal connecting plate 62, convergent part C snaps in and is spacing in the E of the convergent hole of horizontal connecting plate 62, horizontal connecting plate 62 has the trend that continues to move upward, therefore, by convergent part C, to gland bonnet 5, apply a thrust upwards, thereby gland bonnet 5 is held out against to the bottom surface at climatic chamber 1, and then can play good sealing function.
As shown in Figure 5, in situation about measuring, horizontal connecting plate 62 moves downward, because convergent part C is clamped in the E of convergent hole, therefore, pallet 4, vertical driving member 61, convergent part C and block structure D structure as a whole, with horizontal connecting plate 62, move downward, when the block structure D below convergent part C touches weighing-appliance 2, horizontal connecting plate 62 continues to move downward, and block structure D is subject to stopping of weighing-appliance 2 and cannot continue downwards motion, when convergent part C is subject to anchorage force upwards that weighing-appliance 2 applies and is greater than the friction force between convergent part C and horizontal connecting plate 62, convergent part C and horizontal connecting plate 62 are separated, now, weighing-appliance 2 can be measured the weight of sample tobacco bale A.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (4)
1. a measurement mechanism for pipe tobacco and the anti-mouldy time of auxiliary material in cigarette tobacco bale,
It is characterized in that:
Comprise climatic chamber, weighing-appliance and opertaing device, wherein:
Described climatic chamber is used for placing sample tobacco bale;
Described weighing-appliance is for measuring the weight of sample tobacco bale, and this weight measurement is inputted described opertaing device;
Described opertaing device is for recording gravimetric value and the corresponding Measuring Time point of this gravimetric value of sample tobacco bale, and generate the corresponding relation of one group of time and weight, to determine corresponding time of peak pipe tobacco and the anti-mouldy time of auxiliary material in sample tobacco bale in this corresponding relation.
2. device as claimed in claim 1,
It is characterized in that:
Also comprise pallet, gland bonnet, jacking equipment and the driving arrangement of placing sample tobacco bale, wherein:
The bottom of described climatic chamber offers a through hole;
Described pallet is arranged in described climatic chamber;
The top of described jacking equipment is fixedly connected with the bottom surface of described pallet through described through hole;
Described gland bonnet is fixedly connected on described jacking equipment middle part;
Described driving arrangement is electrically connected with described opertaing device, the work order of sending for receiving described opertaing device, and drive described jacking equipment to carry out elevating movement according to this work order;
Under unmeasured state, described jacking equipment is in most significant digit, and described gland bonnet is sticked in the described through hole bottom surface of described climatic chamber, and making described climatic chamber is confined space;
Under measuring state, described jacking equipment is in lowest order, and the bottom of described jacking equipment is placed on described weighing-appliance completely.
3. device as claimed in claim 2,
It is characterized in that:
Described weighing-appliance is ten thousand/ electronic balance.
4. device as claimed in claim 3,
It is characterized in that:
The Temperature Setting of described climatic chamber is within the scope of 25 ℃-50 ℃, and humidity is set within the scope of 65-95%RH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320530170.1U CN203587462U (en) | 2013-08-29 | 2013-08-29 | Device for measuring anti-mildew time of tobacco shred and auxiliary material in cigarette pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320530170.1U CN203587462U (en) | 2013-08-29 | 2013-08-29 | Device for measuring anti-mildew time of tobacco shred and auxiliary material in cigarette pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203587462U true CN203587462U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320530170.1U Withdrawn - After Issue CN203587462U (en) | 2013-08-29 | 2013-08-29 | Device for measuring anti-mildew time of tobacco shred and auxiliary material in cigarette pack |
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| Country | Link |
|---|---|
| CN (1) | CN203587462U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411845A (en) * | 2013-08-29 | 2013-11-27 | 龙岩烟草工业有限责任公司 | Measurement method and measurement device for anti-mildew time of tobacco shreds and auxiliary materials in cigarette packet |
| CN110426116A (en) * | 2019-08-06 | 2019-11-08 | 青岛顺昕电子科技有限公司 | A kind of constant weight measuring device |
-
2013
- 2013-08-29 CN CN201320530170.1U patent/CN203587462U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411845A (en) * | 2013-08-29 | 2013-11-27 | 龙岩烟草工业有限责任公司 | Measurement method and measurement device for anti-mildew time of tobacco shreds and auxiliary materials in cigarette packet |
| CN103411845B (en) * | 2013-08-29 | 2015-10-21 | 龙岩烟草工业有限责任公司 | The measuring method of pipe tobacco and the anti-mouldy time of auxiliary material and device in cigarette tobacco bale |
| CN110426116A (en) * | 2019-08-06 | 2019-11-08 | 青岛顺昕电子科技有限公司 | A kind of constant weight measuring device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20151021 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |