MELT-BLOWN TYPE NON -WOVEN FABRICS MAKING PLANT
A melt-blown type non-woven fabrics making plant (1) is provided, comprising a distributor (2) including at least one main access (20) suitable to convey polymeric fluid and a plurality of secondary accesses (21) suitable to convey gas; a dispenser (3) in fluid passage connection with the distributor (2), configured to dispense polymeric filaments starting from the polymeric fluid and including at least one spinneret (4) suitable to form the polymeric filaments and an air blade (5) suitable to receive the gas to guide the polymeric filaments exiting the dispenser (3), wherein the spinneret (4) comprises a plurality of flanked pinnacles (40) and each one comprising one main outlet (40a) configured to convey the polymeric fluid towards a respective delivery direction (4a), and for each pinnacle (40) a pair of secondary outlets (41) arranged at opposite sides of the respective pinnacle (40) and configured to convey the gas towards the air blade (5), wherein the air blade (5) is suitable to convey jets of gas to converge towards each delivery direction (4a), and wherein the plant (1) further comprises a transfer device (6) configured to place in fluid passage connection the at least one main
The present invention relates to a melt-blown type non-woven fabrics making plant of the type specified in the preamble of the first claim.
In particular, the present invention relates to a plant suitable to allow the extrusion of polymeric filaments intended to implement directly or indirectly non-woven tissue, also known with the acronym TNT.
As it is known, the non-woven fabric, or TNT, is an industrial product similar to a fabric, but obtained with processes different from weaving and knitting. Therefore, inside a non-woven fabric, the fibres have a random path, without detecting any ordered structure whereas in a fabric the fibres have two prevailing directions, orthogonal to each other, usually called warp and weft.
Currently, a plurality of products containing TNT is implemented, depending upon the used implementation technique connected mainly to the use made of the product itself.
In particular, high-quality TNTs for products of hygienic sanitary type and low-quality TNTs used especially for geotex are distinguished.
From a technical point of view, the non-woven fabrics, also known with the Anglophone term “nonwoven fabric”, can be substantially divided into spunlace, spunbond and melt-blown.
The spunlace fabric is subjected to processes which confer equi-directional resistance to the material. Thanks to this property, to the possibility to be produced in several materials such as viscose, polyester, cotton, polyamide and microfibre, to the two possible types of finishing, that is smooth or perforated, and to the plurality of smooth or printed colours, the spunlace is suitable both for the hygienical-sanitary field and for the automobile, cosmetic field, for industrial or disposable uses.
The Spunbond, usually made of polypropylene, is a non-woven fabric which has multiple applications in the agricultural, hygienical-sanitary, construction, furniture, mattress and other similar fields. By means of an adequate treatment, it is possible to implement a series of highly specific products for each field: fluorescent, soft calendered, anti-mite, fire retardant, antibacterial, antistatic, anti UV and other. To the Spunbond several types of finishing can be also applied, such as printed, laminated, laminated flexographically printed, and self-adhesive.
TNT melt-blown is implemented through specific spinnerets with the purpose of reaching higher technical features than the preceding TNTs. In fact, the melt-blown tissue is characterized by fibres having high filtering power both for liquid and gaseous substances.
The melt-blown non-woven fabric producing plants traditionally consist of components as shown in
They consist of a box enclosing the melt-blown fibre making device and all parts which are required to the process to operate at best. Moreover, the known plants, generally comprise a first support, a breaker plate, one pinnacle-like spinneret, a second support and an air blade.
The breaker plate has the purpose of channelling and filtering the polymer, usually polypropylene, towards the pinnacle-like spinneret. The latter is a device comprising, as said in advance, a perforated pinnacle-like portion suitable to allow the exit under pressure of polypropylene.
The first support is substantially an element connecting between box and breaker-plate, the second support instead is suitable to sustain the air blade and it is arranged so as to close again the breaker plate and the melt-blown device inside the box.
Sometimes, the second support and the plates defining the air blade can coincide, limiting the components of the plant. The air blade, instead, consists of a casing enclosing the pinnacle of the melt-blown device so as to address a possibly not turbulent air flow towards the holes of the pinnacle.
From a process point of view, the polymeric material enters inside the box and starts its own path inside thereof at a temperature of about 240-270° C.
If is firstly addressed to the first support, then to the breaker plate and at last towards the pinnacle-like spinneret and, in particular, brought under pressure towards the holes arranged on the pinnacle.
Usually, the pinnacle comprises 30 to 50 holes/inch aligned along a main direction with diameters varying between 0.15 mm and 0.4 mm and with a depth of the holes variable between 10-13 times the diameter size.
As soon as the polymer outgoes from the holes of the pinnacle, it is hit by the air flow coming from the two sides defined by the air blade.
The air blade substantially consists of two conduits converging as far as an ejecting space, or slit, extending from 0.7 to 2 mm wherein the air outgoes at about 180°.
The air acceleration inside the blade allows to implement a flow which, in contact with the polymer, atomizes the latter by implementing jets comprising very fine particles which, in turn, rest upon high-speed movable mats.
Then, the box, apart from including the polymer inlet channel, includes air inlet channels suitable to feed the air blade.
The described known art comprises some important drawbacks.
In particular, the melt-blown plants of known art define a fixed configuration therethrough it is substantially possible to deposit one or more rows of non-woven fabric starting from the same pinnacle.
Therefore, it one wishes to deposit a second row of polymeric filament on the conveyor roller, it is necessary to arrange a second device comprising at least a box, support plate, breaker plate, pinnacle-like spinneret and air blade.
Of course, such need has an enormous impact in economic terms, substantially produced by the sum of the plants' costs, apart from the sum of the management and maintenance costs.
In this situation the technical task underlying the present invention is to devise a melt-blown type non-woven fabrics making plant capable of obviating substantially at least part of the mentioned drawbacks.
Within said technical task an important object of the invention is to obtain a melt-blown type non-woven fabrics making plant allowing to implement more than one single row of polymeric filament.
Another important object of the invention is to implement a melt-blown type non-woven fabrics making plant allowing to reduce the number of components required to implement the above-mentioned advantages.
Moreover, an additional task of the invention is to implement a melt-blown type non-woven fabrics making plant allowing to use at least partially the components of the traditional plants so as to reduce the conversion costs of the plants.
In conclusion, another object of the invention is to obtain a melt-blown type non-woven fabrics making plant which is unexpensive from both an operating and a maintenance point of view.
The technical task and the specified objects are achieved by a melt-blown type non-woven fabrics making plant as claimed in the enclosed claim 1.
Preferred technical solutions are highlighted in the depending claims.
The features and the advantages of the invention are explained hereinafter by the detailed description of preferred embodiments of the invention, with reference to the enclosed drawings, wherein:
In the present document, the measurements, values, shapes and geometrical references (such as perpendicularity and parallelism), when associated to words such as “about” or other similar terms such as “approximately” or “substantially”, are to be meant as excluding measurement errors or inaccuracies due to production and/or manufacturing errors and, above all, excluding a slight deviation from the value, measurement, shape or geometrical reference thereto it is associated. For example, such terms, if associated to a value, preferably designate a deviation not higher than 10% of the value itself.
Moreover, when used, terms such as “first”, “second”, “higher”, “lower”, “main” and “secondary” do not identify necessarily an order, a relation priority or relative position, but they can be simply used to distinguish more clearly components different from each other.
Unless otherwise specified, as it results from the following discussions, it is considered that terms such as “treatment”, “computer science”, “determination”, “calculation”, or the like, relate to the action and/or processes of a computer or similar electronic calculation device which manipulates and/or transforms data represented as physical data, such as electronic quantities of registers of a computer system and/or memories into other data similarly represented as physical quantities within computer systems, registers or other devices for storing, transmitting or displaying information.
The measurements and data reported in the present text are to be considered, unless otherwise indicated, as performed under International Standard Atmosphere ICAO (ISO 2533:1975).
With reference to the Figures, the melt-blown type non-woven fabrics making plant according to the invention is designated as a whole with number 1.
The plant 1 is preferably configured to make non-woven fabric based upon the melt-blown technology. The latter, generally, provides that the melt polymeric material is extruded through a plurality of holes with micrometric nominal sizes suitable to distribute the polymeric filaments addressed towards a conveyor belt or to introduce the polymeric filaments inside a hole in a pinnacle in contact with one or more air blades.
In this regard the plant 1 comprises some elements of known art.
Preferably, the plant 1 comprises at least a distributor 2.
The distributor 2 is substantially a device suitable to allow the distribution of polymeric fluid and air inside respective conduits for implementing a diffusion path. The distributor 2, then, is configured to be operatively connected to one or more boxes 10.
The box 10 is substantially a conventional element of a melt-blown plant. In particular, the box 10 is the portion through which the polymeric fluid and the gas are conveyed to the distributor 2.
Therefore, the box 10 comprises at least a main conduit 10a suitable to convey polymeric fluid and a plurality, for example a pair, of secondary conduits 10b suitable to convey gas.
The distributor 2, then, comprises at least one main access 20.
The main access 20 is suitable to be placed in fluid passage connection with the main conduit 10a. Then, the main access 20 is the portion through which the polymeric fluid accesses the distributor 2.
The distributor 2 can comprise even a plurality of main accesses 20.
The distributor 2, moreover, comprises at least a secondary access 21. Preferably, the distributor 2 comprises a plurality of secondary accesses 21.
The secondary accesses 21 are suitable to be placed in fluid passage connection each one with a respective secondary conduit 10b. Therefore, the secondary accesses 21 define the portions through which the gas accesses the distributor 2. Generally, the distributor 2 can be in one single piece, or can comprise a plurality of different portions, for example each one comprising at least one main access 20 and a secondary access 21, as shown in
The plant 1, moreover, comprises at least a dispenser 3.
The dispenser 3 is in fluid passage connection with the distributor 2. In particular, the dispenser 3 receives from the distributor 2 both the polymeric fluid and the gas. Then, the dispenser 3 is configured to dispense polymeric filaments starting from the polymeric fluid.
Therefore, in this regard, the dispenser 3 comprises at least one spinneret 4.
The spinneret 4 is substantially suitable to form polymeric filaments. Therefore, the spinneret 4 is the portion of plant 1 configured to extrude the polymeric fluid under the form of filament. Of course, in this regard and as better specified hereinafter, the spinneret 4 too can be in one single piece or can include a plurality of distinct components adjacent to each other or even spaced apart from each other.
The dispenser 3, moreover, comprises even an air blade 5. The air blade 5 is substantially suitable to receive the gas to guide the polymeric filaments exiting the dispenser 3.
Like the spinneret 4 and the distributor 2, even the air blade 5 can be in one single piece or it can comprise a plurality of distinct components. For example, as shown in
The just described components are substantially common to all melt-blown plants. Moreover, as it is known, the distributor 2 and the dispenser 3 mainly develop along a main direction 1a.
The main direction 1a is the extension direction of the plant and, in particular, of the line for dispensing the polymeric filament.
The plant 1 is described hereinafter in relation to sections normal to the main direction 1a of the plant 1 itself, considering that substantially the described components are distributed periodically or with continuity along the main direction 1a.
The plant 1, in fact, comprises some peculiar features.
In particular, advantageously, the spinneret 4 comprises a plurality of pinnacles 40. The pinnacles 40 are substantially tip elements from the sharp end of which filaments of already formed polymeric fluid outgo. In particular, at the end of each pinnacle 40 the air blade 5 conveys gas, typically air, to guide the polymeric fluid out of the dispenser 3.
The pinnacles 40 then are mutually flanked. This means that the pinnacles 40 develop parallelly to the main direction 1a one next to the other one.
In this regard, the pinnacles 40 can be in one single piece, In this case they can be flanked and constitute one single block, as shown in
Moreover, each pinnacle 40 comprises at least one main outlet 40a. The main outlet 40a is substantially configured to convey the polymeric fluid along a respective delivery direction 4a. Therefore, the main outlet 40a corresponds to the outlet nozzle of the pinnacle 40.
The delivery direction 4a of each main outlet 40a is normal, or slanted, with respect to the main direction 1a. Then, the main outlets 40a are configured such that the delivery directions 4a are mutually parallel.
Moreover, advantageously, the pinnacles 40 are configured to define a distance d between the respective delivery directions 4a. In particular, the distance d is defined from the normal to the delivery directions 4a. Then, the distance d is preferably comprised between 5 mm and 1 m. Still more preferably the distance d can be comprised between 1 cm and 7 dm. Still more preferably, the distance d can be comprised between 3 cm and 5 dm. More suitably, the distance could be comprised between 5 cm and 3 dm.
Of course, the pinnacle 40, as already mentioned, comprises at least a main outlet 40a in the section view. If one considers the whole depth of the spinneret 4, the pinnacle 40 comprises a plurality of main outlets 40a distributed even along the main direction 1a or parallelly thereto, as clearly shown for example in
The spinneret 4, moreover, comprises for each pinnacle 40 a pair of secondary outlets 41.
The secondary outlets 41 are preferably arranged at opposite sides relatively to the respective pinnacle 40. Under this it is meant that the secondary outlets 41 can be obtained on the pinnacle 40 itself, as shown in the embodiment of
Like for the main outlets 40, of course, even the secondary outlets 41 are preferably distributed along or parallelly to the main direction 1a.
The air blade 5 then, advantageously, is configured to convey jets of gas to converge towards each delivery direction 4a. In this way, the jets of gas meet at the main outlet 40a of each spinneret 40 and guide the polymeric filament exiting the dispenser 3, in particular along the delivery direction 4a.
Of course, even the air blade 5 mainly develops along the main direction 1a. Therefore, in detail, the air blade 5 can define a slot developing parallelly to the main direction 1a at each main outlet 40a, that is parallelly to the tip of each pinnacle 40. The plant 1, additionally, comprises a transfer device 6.
The transfer device 6 is configured to place in fluid passage connection at least each secondary access 21 with a respective secondary outlet 41. Or, advantageously, the transfer device 6 can be configured to place in fluid passage connection at least each secondary access 21 with each pair of secondary outlets 41.
Moreover, in at least an embodiment, the transfer device 6 can even be advantageously configured to place in fluid passage connection the main access 20 with at least one of the main outlets 40a. Moreover, the main access 20 of the transfer device 6 could even be advantageously configured to place in fluid passage connection the main access 20 with each one of the main outlets 40a.
Or, alternatively, the transfer device 6 can also be configured to place in fluid passage connection a plurality of main accesses 20 with a respective main outlet 40a.
Then, generally, the transfer device 6 allows to use at least part of the traditional plants to convey polymeric fluid and gas to the spinneret 4 of the plant 1.
Even the transfer device 6 can be in one single piece, or it can comprise a plurality of distinct portions, as shown in
More in detail, the transfer device 6 comprises at least one main inlet 60.
The main inlet 60 is in fluid passage connection with the main access 20. Therefore, the main inlet 60 is suitable to receive polymeric fluid from the main access 20.
Moreover, the transfer device 6 comprises a plurality of main branches 61.
The main branches 61 are, each one, in passage connection with a respective main inlet 60, as shown in
Then, the main branches 61 substantially transfer polymeric fluid from the main inlet 60 to each one of the main outlets 40a.
The transfer device 6, advantageously, comprises even a plurality of secondary inlets 62.
Each one of the main inlets 62 is in fluid passage connection with a respective secondary access 21. Then, each main inlet 62 receives gas, for example air, from a secondary access 21. Moreover, the transfer device 6 comprises a plurality of pairs of secondary branches 63.
In each pair, the secondary branches 63 are in fluid passage connection with a respective secondary inlet 62, as shown in
In order to be able to implement such configuration, different solutions are possible. For example, in a first embodiment shown in
In this context, then, the main inlet 60 preferably corresponds to the main access 20 and each secondary inlet 62 corresponds to a respective secondary access 21. Then, the spinneret 4 can comprise, for each pinnacle 40, a main delivery channel 42 and a pair of secondary delivery channels 43.
The main delivery channel 42 is preferably configured to place in fluid passage connection a main branch 61 and the main outlet 40a.
Each one of the secondary delivery channels 43 of the pair is configured to place in fluid passage connection a respective secondary branch 63 with a respective secondary outlet 41 of the same said pair of secondary outlets 41.
In this embodiment, then, the spinneret 4 defines the conventional features.
The distributor 2 can even comprise the transfer device 6 differently.
The distributor 2 can be in one single piece, or divided into two different blocks.
For example, the distributor 2 can comprise one or more support plates 7 and one or more breaker plates 8. The support plate 7, as it is known, is an interface element usually arranged between box 10 and breaker plate 8. The breaker plate 8 is a connection plate between support plate 7 and spinneret 4.
Advantageously, the transfer device 6 can be wholly comprised in one or more between the support plate 7 and the breaker plate 8. Under this it is meant that the transfer device 6 can develop in a single one between support plate 7 and the breaker plate 8, or it can develop partially in the support plate 7 and partially in the breaker plate 8.
In a second embodiment as shown in
In this case, the spinneret 4 no more includes the conventional features as previously indicated. Moreover, the distributor 2 comprises a main distribution channel 22 and a secondary distribution channel 23.
The main distribution channel 22 is configured to place in fluid passage connection the main access 20 and the main inlet 60.
Each one of the secondary distribution channels 23, instead, is configured to place in fluid passage connection a respective secondary access 21 with a respective secondary inlet 62.
As already explained, the description is made by considering a section of the plant normal to the main direction 1a.
However, the plant 1 develops even along the main direction 1a.
Therefore, the plant 1 can define a main plane 1b along which at least part of the plant develops.
The main plane 1b is parallel to the main direction 1a. Moreover, still more in detail, the main plane 1b is a virtual, or even physical, interface plane thereto the ends of the main 61 and secondary 63 branches access.
In detail, each one of the main branches 61 defines a main end 61a.
The main end 61a is substantially opposite to the main inlet 60.
Each one of the secondary branches 63, instead, defines a secondary end 63a. The secondary end 63a is preferably opposite to the secondary inlet 62.
Then, the ends 61a, 63a are distributed on the main plane 1b such that, for each pinnacle 40 and for each group including a main end 61a and a pair of adjacent secondary ends 63a, at least the secondary ends 63a result to be mutually misaligned with respect to directions normal to the main direction 1a, as shown in
Alternatively, all ends 61a, 63a can be mutually misaligned with respect to directions normal to the main direction 1a, as shown in
In other terms, the ends 61a, 63a which are upstream or downstream of the same pinnacle 40 and which are adjacent therebetween belong to the same group.
Still more in detail, preferably, for each pinnacle 40 and for each group, at least a main end 61a and a secondary end 63a of the same group are mutually aligned along expansion directions 6a. The expansion directions 6a are transversal to the main direction 1a.
Moreover, the expansion directions 6a are preferably mutually parallel, as explicitly shown in
This configuration, advantageously, avoids that the various branches 61, 63 intersect to each other.
In conclusion, the plant 1 can define additional detail features.
For example, the spinneret 4 can comprise at least a seat 44.
If present, the seat 44 is configured to house at least a filter 11. The filter 11 can be a spongy element suitable to filter the polymeric fluid entering the spinneret 4. Therefore, the seat 44 is preferably arranged adjacent to the distributor 2.
In particular, the seat 44, preferably in the second embodiment, can be arranged between the main inlet 60 and the main distribution channel 22. Or, the seat 44, preferably in the first embodiment, can be arranged between each said main branch 61 and a respective main delivery channel 42.
The plant 1, of course, can comprise also the filter 11 and one or more boxes 10. The operation of the previously described melt-blown type non-woven fabrics making plant 1 in structural terms is substantially similar to the operation of any melt-blown type non-woven fabrics making plant.
However, the plant 1 allows to implement a plurality of parallel rows, parallelly to the main direction 1a, thanks to the fact of being able to exploit a plurality of flanked pinnacles.
The melt-blown type non-woven fabric making plant 1 according to the invention achieves important advantages.
In fact, the plant 1 allows to implement more than one single raw of polymeric filament. The possibility of using a plurality of flanked pinnacles allows to improve the quality of the non-woven fabric and to increase the productive rapidity.
Moreover, the plant 1 allows, in view of the above-mentioned advantages, to reduce the number of components required to dispense a plurality of rows and further allows to exploit at least part of the plants of known art considering that the device can comprise at least boxes, and in case also conventional dispensers 2.
Therefore, the plant 1 allows to reduce the conversion costs of the plants and, in each case, is cheaper from both an operating and maintenance point of view.
The invention may be subject to variants within the scope of the invention concept defined by the claims.
For example, as already described and shown in
This configuration can be easily used to convey two polymers of different type exiting the dispenser so as to implement several non-woven fabrics or non-woven fabrics including filaments of different material, that is obtained from different polymers.
Within such scope, all details can be replaced by equivalent elements and the materials, shapes and sizes can be any.
Claims
1. Melt-blown type non-woven fabrics making plant (1) comprising: and characterised by
- a distributor (2) configured to be operatively connected to one or more boxes (10) and including at least one main access (20) suitable to be placed in fluid passage connection with a main conduit (10a) of said box (10) suitable to convey polymeric fluid and a plurality of secondary accesses (21) suitable to be placed in fluid passage connection each with a respective secondary conduit (10b) of said box (10) suitable to convey gas;
- a dispenser (3) in fluid passage connection with said dispenser (2), configured to dispense polymeric filaments from said polymeric fluid and including at least one spinneret (4) suitable to form said polymeric filaments and an air blade (5) suitable to receive said gas to guide said polymeric filaments exiting said dispenser (3);
- said spinneret (4) comprises: a plurality of mutually flanked pinnacles (40) each comprising at least one main outlet (40a) configured to guide said polymeric fluid along a respective delivery direction (4a) such that said delivery directions (4a) are mutually parallel, and for each pinnacle (40) a pair of secondary outlets (41) arranged at opposite sides relative to said respective pinnacle (40) and configured to convey said gas towards said air blade (5),
- said air blade (5) is adapted to convey jets of said gas to converge towards each of said delivery direction (4a) so as to guide said polymer filaments, and
- said plant (1) further comprising a transfer device (6) configured to place in fluid passage connection said at least one main access (20) with at least one said main outlet (40a) and each said secondary access (21) with at least one respective said secondary outlet (41).
2. Plant (1) according to claim 1, wherein said pinnacles (40) are configured to define a distance (d) between said respective dispensing directions (4a) of between 5 mm and 1 m.
3. Plant (1) according to claim 1, wherein said pinnacles (4) are in one piece or mutually adjacent and constrained or mutually distinct and adjacent or separated.
4. Plant (1) according to claim 1, wherein said transfer device (6) is configured to place in fluid passage connection said main access (20) with each of said main outlets (40a).
5. Plant (1) according to claim 1, wherein said distributor (2) comprises a plurality of main accesses (20) and said transfer device (6) is further configured to place in fluid passage connection each main access (20) with respective said main outlet (40a).
6. Plant (1) according to claims claim 1, wherein said transfer device (6) is also configured to place in fluid passage connection each of said secondary accesses (21) with a respective said secondary outlet (41).
7. Plant (1) according to claim 1, wherein transfer device (6) is further configured to place in pass-through connection each of said secondary accesses (21) with a respective one of said pair of secondary outlets (41).
8. Plant (1) according to claim 1, wherein said transfer device (6) comprises at least one main inlet (60) in fluid passage connection with a respective main access (20), a plurality of main branches (61) in fluid passage connection each with a respective main inlet (60) or all with said main inlet (60) and each with a respective said main outlet (40a), a plurality of secondary inlets (62) each in fluid passage connection with a respective said secondary inlet (21), and a plurality of pairs of secondary branches (63) wherein each pair of said secondary branches (63) are in fluid passage connection each with a respective secondary inlet (62) or all with a respective said secondary inlet (62) and each with a respective said pair of secondary outlets (41).
9. Plant (1) according to claim 1, wherein said transfer device (6) is entirely included in said spinneret (4) and said distributor (2) comprises a main distribution channel (22) configured to place in fluid passage connection said main access (20) and said main inlet (60) and a plurality of secondary distribution channels (23) each configured to place in fluid passage connection a respective said secondary access (21) with a respective said secondary inlet (62).
10. System (1) according to claim 1, wherein said transfer device (6) is entirely comprised in said distributor (2), said main inlet (60) corresponds to said main access (20), each said secondary inlet (62) corresponds to a respective said secondary access (21).
11. Plant (1) according to claim 1, wherein said distributor (2) comprises one or more support plates (7) and one or more breaker plates (8) and said transfer device (6) is integrally comprised in one or more between said support plate (7) and said breaker plate (8).
12. Plant (1) according to claim 10, wherein said spinneret (4) comprises, for each said pinnacle (40) a main delivery channel (42) configured to place in fluid passage connection a said main branch (61) and said main outlet (40a) and a pair of secondary delivery channels (43) each configured to place in fluid passage connection a respective said secondary branch (63) of the same said pair of secondary branches (63) with a respective said secondary outlet (41) of the same said pair of secondary outlets (41).
13. System (1) according to claim 1, wherein said distributor (2) and said dispenser (3) expand predominantly along a main direction (1a), each of said main branches (61) defines a main end (61a) opposite said main inlet (60), each of said secondary branches (63) defines a secondary end (63a) opposite said secondary inlet (62) and said ends (61a, 63a) are distributed in a main plane (1b) parallel to said main direction (1a) in such a way that, for each pinnacle (40) and for each group including a said main end (61a) and a pair of adjacent said secondary ends (63a), at least said secondary ends (63a) are mutually misaligned with respect to directions normal to said main direction (1a).
14. Plant (1) according to claim 1, wherein said ends (61a, 63a) are distributed in a main plane (1b) such that all said ends (61a, 63a) of the same said group result to be mutually misaligned with respect to directions normal to said main direction (1a).
15. Plant (1) according to claim 13, wherein for each pinnacle (40) and for each said group, at least one said main end (61a) and one said secondary end (63a) are mutually aligned along expansion directions (6a) transverse to said main direction (1a).
Type: Application
Filed: Dec 15, 2023
Publication Date: Jul 16, 2026
Inventor: Giuseppe ANGELICO (Teramo)
Application Number: 19/138,193
