Through-air device that reduces the intrusion of outside air

Abstract

Through-holes used for drying or bonding paper webs, tissue paper webs, or nonwoven webs. The present invention provides a device and a method for operating the through-air device. [Solution] The through-air device of the present invention comprises a web transport structure configured to move, and A first component comprising at least one sealing element adjacent to the web transport structure, The sealing element is configured to reduce the intrusion of outside air into the through-air device. The through-air device is also designed to reduce the intrusion of outside air into the through-air device. The sealed element comprises at least one flow path configured to guide air through it. The method of operating the device involves sealing elements to reduce the intrusion of outside air into the through-air device. It features steps to guide air.

Description

Technical Field

[0001] In part, the present invention relates to a through-air apparatus for manufacturing web products and a usage method for reducing the intrusion of outside air into the through-air apparatus.

Background Art

[0002] The term "through-air technology" refers to a system or method capable of drying or adhering fibers or filaments by passing air through a papermaking web, a tissue web, or a non-woven fabric web. For example, drying of non-woven fabric products (such as tea bags, special papers, etc.), drying and curing of glass fiber mats, filter papers, and resin-treated non-woven fabrics, thermal bonding and drying of spunbond non-woven fabrics, drying of hydroentangled webs, thermal bonding of two-component fiber-based or non-two-component fiber-based geotextiles, drying and curing of each fabric grade, thermal bonding of an absorbent core using fusible binder fibers, etc. can be mentioned. In addition, drying of tissue paper is also an application of through-air technology.

[0003] Systems and methods related to through-air drying are generally referred to using the acronym "TAD". Systems and methods related to through-air bonding are generally referred to using the initials "TAB".

[0004] Basically, a through-air apparatus includes a rigid and air-permeable web conveyance structure. A web is placed on the web conveyance structure, and while the web conveyance structure moves, a fan blows air through the wall of the web conveyance structure, enabling the web to be processed. Generally, the web conveyance structure has a plurality of openings through which air can pass.

Summary of the Invention

[0005] In the first embodiment, drying or bonding of papermaking webs, tissue paper webs, or nonwoven fabric webs is performed. A through-air device is provided. [Means for solving the problem]

[0006] The device comprises a web transport structure configured to move, and adjacent to the web transport structure A first component comprising at least one sealing element, wherein the at least one The sealing element is configured to reduce the intrusion of outside air into the through-air device, the first The device comprises components and further reduces the intrusion of outside air into the through-air device. so at least one flow path configured to guide air to the at least one sealing element It is equipped with.

[0007] In other embodiments, papermaking webs, tissue paper webs, or nonwoven fabric webs are dried or bonded. A method for operating a through-air device is provided. The method involves a part of the web transport structure. The steps include placing the web and moving the web together with the web transport structure. The method includes the step of moving the web transport structure. The method further includes the step of moving the web transport structure A first component comprising at least one sealing element adjacent to the body, the first The at least one sealing element on the component prevents outside air from entering the through-air device. The method includes the step of preparing a first component which is configured to reduce. Furthermore, the at least one sealing element reduces the intrusion of outside air into the through-air device. This includes a step of introducing air into the system.

[0008] In further embodiments, drying or bonding of papermaking webs, tissue paper webs or nonwoven webs. A through-air device for attachment is provided. The device is a rotary web conveying structure, and air A transport surface having multiple openings to allow air to pass through, and the web transport structure The active and inactive zones in the angular direction are defined for the through-air device. The web wrapping angle that forms the active airflow zone and the inactive airflow zone The device further comprises a rotary web transport structure. A fixed structure that is subject to relative rotation of the structure, comprising at least one sealing element. and the at least one sealing element is equivalent to the one not having the at least one sealing element. Compared to the structure, the in-leakage of outside air into the active zone of the through-air device is reduced. It is equipped with a fixed structure that is configured to reduce. The device further includes recirculated air Alternatively, by delivering other heated airflow to one or more of the sealing elements, the through At least one to further reduce the in-leakage of outside air into the active zone of the air device It is equipped with a flow channel. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram of a conventional through-air system. [Figure 2] This is a schematic diagram of a through-air system according to one embodiment, which recirculates air from within the device system. [Figure 3] This is a schematic diagram of a through-air system according to another embodiment, which recirculates air from within the device system. [Figure 4] This is a schematic diagram of a through-air system according to another embodiment, which recirculates air from within the device system. [Figure 5] Schematic diagram of a through-air apparatus system according to yet another embodiment that recirculates air from an external air source. [Figure 6] Cross-sectional view of a through-air apparatus according to one embodiment. [Figure 7] Detailed cross-sectional view of the portion enclosed by the circle in FIG. 6. [Figure 8] Cross-sectional view of a through-air apparatus according to another embodiment. [Figure 9] Detailed cross-sectional view of the portion enclosed by the circle in FIG. 8. [Figure 10] Cross-sectional view of a through-air apparatus according to another embodiment having a plenum. [Figure 11] Side view cross-sectional view of a through-air apparatus according to another embodiment having an exhaust duct sealing element. [Figure 12] Detailed cross-sectional view of the portion enclosed by the circle in FIG. 11. [Figure 13] Side view cross-sectional view of a through-air apparatus according to another embodiment having a radial exhaust duct sealing element. [Figure 14] Cross-sectional view of a through-air apparatus according to another embodiment having an outward flow-through arrangement configuration. [Figure 15] Cross-sectional view of a through-air apparatus according to another embodiment having an inward flow-through arrangement configuration. [Figure 16] Cross-sectional view of a through-air apparatus according to another embodiment having a flat bed configuration. **DETAILED DESCRIPTION OF THE INVENTION**

[0010] The present disclosure is directed to through-air apparatuses configured to manufacture various products such as papermaking webs and / or tissue webs and / or non-woven webs. Those skilled in the art will appreciate that the through-air apparatus can be configured as a through-air drying apparatus ( TAD) and / or a through-air bonding apparatus (TAB) depending on the scenario in which the apparatus is used. This is clear from the fact that It would be easy. Furthermore, a person skilled in the art would use the same through-air device to produce the final finished product It is clear that this allows for the manufacture of various web products in a roll-like form. Furthermore, the product does not have to be in roll form, and / or it may be cut to create a finished product. It should also be clear that it can be used as a product. Furthermore, a person skilled in the art would know that the through-air device However, various films, various fabrics or other web-type materials (however, this (and not limited to these) it can be configured to manufacture a variety of products, as well as drying, heat contact This process involves loading, sheet transport, water extraction, web tensioning, porosity measurement, etc. (however, it is not limited to these). (Not performed), mass transfer, heat transfer, material normalization, web wave It is also clear that it can be used in various processes such as shaping and quality monitoring. Ro.

[0011] As will be described in detail later, the through-air device is a rigid and air-permeable web conveying structure It comprises a structure. The web transport structure moves relative to another part of the device. It is configured such that a web is placed on the web transport structure, and the web moves as The web can be processed by a fan blowing air through the wall of the web transport structure. Typically, the web transport structure has multiple openings to allow air to pass through the structure. It has, as will be described in detail later, and as shown in Figures 6 to 15, some embodiments In this configuration, the web transport structure is configured to rotate about a first axis. This is a through-air roll. As will be described later, and as shown in Figure 16, other implementations In this state, the web transport structure moves in translational motion along a horizontal or inclined surface. This is a flatbed belt that has been constructed. This disclosure is not limited to the above, but includes the following: Each configuration described herein is a web conveying structure configured to perform rotational and / or translational motion. It was understood that it could be incorporated into a wide variety of through-air device configurations that utilize fabricated structures. stomach.

[0012] In a particular embodiment, the web (i.e., the product) is typically in the form of a sheet. and partially wrap around the cylindrical shell of the through-air device (i.e., the through-air roll) The web is wrapped around a portion of the roll, for example, from 90° to 360°. Typically, it is wrapped around a portion in the range of 180° to 300°. Usually, the through air The cylindrical wall of the roll has multiple openings configured for air to pass through. Fan / The blower allows air to flow through the entire product. Typically, the through-air roll... It is located within a hood that optimizes the characteristics of the airflow, along with the rotating shell. As the aforementioned product moves and passes through the active zone of the device, the fan / blower The product is processed by allowing air to flow in through the wall of the cylindrical shell. A heater may be provided so that heated air flows through the through-air roll. .

[0013] Figure 1 shows a conventional through-air device system. As shown in the figure, The unit 100 includes a through-air roll 120 configured to rotate within the hood 130. The system uses conduit 170 to supply system air (also known as process air). The main fan guides the air into the hood 130 and draws it into the through-air roll 120. Includes n140. As shown in the diagram, the conduit 170 is also connected to the air heater 150. This allows heated air to be guided to the through-air roll 120. Furthermore, an exhaust pipe draws air from the device 100 via the conduit 170 and releases it into the outside air. It may include Fan 160. As shown in Figure 1, the system air is in a closed loop, May The system air that flows from the fan 140 through the conduit 170 into the hood 130 is It passes through the roof air roll 120 and either flows out of the exhaust duct or into the conduit 170. .

[0014] Typically, the through-air device 100 is an extremely large machine. For example, a through-air roll 120 has a length of 1 foot (approximately 0.30 m) to 30 feet (approximately 9.14 m) and a diameter of It can range from 1 foot (approximately 0.30 m) to 22 feet (approximately 6.71 m). Roll 120 The cylindrical wall can be composed of a rigid structure with openings to allow air to circulate. In this configuration, the through-air roll 120 is made by Valmet's HONEYCOMBROL It could be L (registered trademark).

[0015] As described above, the through-air device 100 receives the system air and processes the web. It has an active airflow zone configured to perform the following: The through airflow zone is configured to receive the web product of the through air roll 120. It is partially formed by the completed portion. Also, as shown in Figure 1, the through The air device is further configured to receive the web product from the through-air roll 120. It has an inactive airflow zone that is partially formed by the uncompleted portion. As will be explained in detail below, these active and inactive zones are as described above. This may vary depending on how the b is wrapped around the through-air roll 120.

[0016] The inventors of this invention found that the conventional through-air device 100 shown in Figure 1 has a problem. Specifically, the inventors designed the through-air device 100 to allow unwanted intake of outside air. We found that a leak occurred. As will be described in more detail later, typically the web transport structure There is a space, or gap, between it and the adjacent component of the through-air device 100. A gap exists, allowing the web transport structure to move. Normally, this gap The interval is approximately 0.06 to 0.375 inches (approximately 0.15 to 0.95 cm). (See Figure 1) In this particular embodiment, the web transport structure is a rotary through-air roll 120. To reduce outside air leakage, these adjacent components have (as described below) fewer At least one sealing element may be provided. However, even then, the aforementioned S Outside air enters the through-air device. The inventors considered the size of the through-air roll, Depending on various factors such as width, operating vacuum level, rotational speed, and load, how much seal clearance can be controlled? Regarding the ability to set the size to a small level, we have found that there are limitations at this point. We will discuss this in more detail later. Thus, each aspect of the present disclosure reduces such in-leakage of outside air into the through-air device. And it is aimed at controlling it.

[0017] As will be described in detail later, each aspect of this disclosure includes preventing outside air from entering the through-air device. To reduce the amount of air in at least one sealing element of one or more components of the through-air device, This includes guiding air. As will be described later, the air guided into the sealing element is various The location may also be the source of the supply, for example, another part in the through-air device system. This includes, but is not limited to, cases where the system air is recirculated from the minutes. In one embodiment, In this case, the air is supplied from the exhaust line of the through-air device. Other air Other sources can also be considered, and these will be discussed later. For example, within the aforementioned through-air device system Either a heated air source or a non-heated air source, which does not specifically exist, may be used. As described later, the through-air device includes at least one that guides this air to the sealing element. A channel is provided.

[0018] The inventors believe that this disclosure may offer several advantages. Firstly, the concepts of this disclosure may be useful. If used, exhaust gases can be reused and / or internal heat loss can be minimized and / or through air can be passed through. The energy efficiency of the through-air device can be improved by reducing the intrusion of outside air into the device. Secondly, by utilizing the concepts described herein, the humidity level of the system air within the through-air device can be controlled. The adjustment and / or control of the bell may become easier. Thirdly, the concept of this disclosure allows for the conventional Compared to through-air devices, this increases the gap / space between the sealing element and the web transport structure. It could become possible.

[0019] The following will detail various embodiments, but before that, let's look at Figures 2 to 5, which were conceived by the inventors. This section will explain the complete details of the schematic diagrams of the various through-air devices shown.

[0020] The inventors developed a novel through-air device configuration that reduces the intrusion of outside air into the through-air device. This led to the following: As will be explained in more detail later, the device delivers air to at least one sealed element. It is equipped with at least one flow path. Figures 2 to 5 show various overviews of the through-air device system. This is a schematic diagram illustrating various air sources assumed in this disclosure. (See Figure 6 below) Figure 16 shows various configurations of the flow path inside the through-air device that guides the air to the sealing element. This is what was shown.

[0021] Figure 2 shows that heated air is delivered to at least one sealed element by the booster fan 204. This is a schematic diagram of one embodiment of a through-air device system. Similar to Figure 1, the through-air device The unit 200 includes a through-air roll 120 configured to rotate within the hood 130. As shown in the figure, in one embodiment, the web transport structure is a through-air roll 120 As will be described in more detail later, and as shown in Figure 16, in other embodiments, rotation A configuration without this is also conceivable, in which the web transport structure is configured to perform translational motion. It may consist of a bed belt. As shown in the figure, the main fan 140 is System air is introduced into the through-air device 200 via pipe 170. An air heater 150 is used. As a result, heated air can be guided into the through-air device 200. Furthermore, exhaust fan 16 By using 0, air can be drawn out of the device 200.

[0022] A point worth noting is that, unlike the conventional device shown in Figure 1, the through-air device 2 shown in Figure 2 is different. Unit 00 has an additional conduit 202 equipped with a booster fan 204. More details later. As stated, the conduit 202 and booster fan 204 are located within the through-air device 200. It is configured to guide air to at least one sealing element. Details of the method are shown in Figures 6 to 16, and will be explained in detail later. Figure 2 As shown, using conduit 202 and booster fan 204, from conduit 170 The exhaust is specifically directed back to the at least one sealed element within the through-air device 200, This reduces the intrusion of outside air into the through-air device 200.

[0023] Figure 3 is a schematic system diagram of another embodiment of the through-air device 300. Figure 3 is a schematic system diagram of Figure 2 and One difference is that in the embodiment shown in Figure 3, the conduit 202 and booster fan 2 shown in Figure 2 are different. Conduit 302 is used instead of 04, which allows heated exhaust to pass through air device 30 One advantage is that it can be recirculated into a sealed element within 0. As mentioned above, the air is sealed Details of the methods that can be specifically derived from the elements are shown in Figures 6 to 16, and will be explained in more detail later. Let me explain in detail. In this embodiment, the conduit 302 is located downstream of the exhaust fan 160. Therefore, the exhaust fan 160 can guide the air into the sealed element. In certain embodiments, a booster fan 204 is not required separately.

[0024] Furthermore, this disclosure also considers configurations in which the air supply source for the sealed element is other than the exhaust line. It can be obtained. For example, in this disclosure, as described in the system schematic diagram shown in Figure 4, One possible implementation configuration involves using the main fan 140 to guide and deliver air to the sealed element. As shown in the diagram, the normal conduit 170 between the main fan 140 and the air heater 150 A branching conduit 402 is provided. As will be described in detail later, conduit 402 is through The device 400 is configured to guide air to at least one sealed element. As will be explained in detail below, the conduit 402 has a damper 4 that controls the amount of air flowing to the sealing element. It may be equipped with one or more flow control structures such as 04. This allows the humidity level of the system air to be controlled. It may become possible to control / adjust the amount.

[0025] Figure 5 is a schematic diagram of another through-air device system according to yet another embodiment. In the embodiment, the air is a heated air source located outside the system air of the through-air device system. It is delivered from 510 to the sealed element. This disclosure is not limited thereto, and non-heating heat sources are also conceivable. As shown in the figure, the conduit 502 allows heated air from the heated air source 510 to pass through the air device. It is configured to lead to a 500 sealing element. For example, in one embodiment, an air source 510 However, the preheating outside air, turbine exhaust, Yankee hot air system exhaust, and vacuum pump exhaust are all present. Air, other heated airflow in paper machines or paper mill environments, or any other heating This disclosure may include a hot air source. This disclosure is not limited thereto, and other embodiments may include a non-heated air source. It may include other things.

[0026] As shown in Figures 2 to 5, this disclosure provides various supply sources (inside the through-air system and The system obtains air from an external supply source located outside the system air supply of the through-air device system. Various configurations are considered in which the air is sent into a through-air device and guided to at least one sealing element. It can be obtained.

[0027] Next, referring to Figures 6 to 16, air enters at least one sealed element of the through-air device. In particular, we will elaborate on the methods that can be derived.

[0028] Figure 6 shows a through-air roll 6 configured to rotate around a first axis 602. The diagram shows a through-air device 600 equipped with 10 (i.e., a rotary web conveying structure). As shown, the web 620 is wrapped around the roll 610. Through-air roll 610 The device 600 has a conveying surface 612 with multiple openings to allow air to pass through. Furthermore, it can assist in the transfer of the web 620 onto and off the roll 610. It may be equipped with roller 614. The angular direction of the web conveying structure depends on the web winding angle θ. The active and inactive zones are defined. As shown in Figure 6, the roller 614 is such that the web wrapping angle θ of the inactive zone is approximately 110° Furthermore, the web angle of the active zone is positioned to be approximately 250°. If you are a business, this disclosure is not limited to this, and those angles may be different. That point should be clear.

[0029] Furthermore, a person skilled in the art would know that these inactive zones and active zones of the web transport structure are also The active zones correspond to the active airflow zones and non-active zones of the through-air system. It is also clear that an active airflow zone is formed. As mentioned above, The active airflow zone of the Lueair device is the web that receives the system air. This refers to the part configured to perform the following process. The active of the through-air device. The airflow zone is the area around the roll 610 where the web is wrapped, and the conduit 170 ( It can be defined as a peripheral region configured to receive system air (see Figure 1). In contrast, the inactive airflow zone of the through-air device is in front of the roll 610. This can be defined as an area to which the web cannot be wrapped.

[0030] The through-air roll 610 is a component of the through-air device, such as a fixed structure. In contrast, it can rotate relative to it. As will be explained in detail later, as a fixed structure, the internal baffle and / or inactive zone blocking plate and / or exhaust duct and / or Examples of fixed skirt portions in the radial or transverse direction of the plenum and / or hood. Various components may be mentioned, but are not limited to these. Those skilled in the art will know that fixed structures The associated sealing elements may be made of Teflon (registered trademark), metal, plastic, etc. (however, this may not apply.) It is clear that it can consist of a variety of materials (not limited to these). This will be discussed in more detail later. As such, in one embodiment, the sealing element is located at the end position of the fixed structure and / or This is the edge.

[0031] The specific embodiments disclosed in Figures 6 and 7 involve a fixed structure that blocks inactive zones. This shows a configuration consisting of rate 630. As shown in the diagram, inactive zone blocking. Plate 630 is connected to baffle 650. Plate 630 is a through airflow The inactive zone of the 610 is configured to cover the inactive zone and prevent outside air from leaking in. As shown in the figure, the inactive zone blocking plate 630 is through air roll 6 It may be a curved member that matches the contour of 10. In another embodiment, the blocking plate is flat It can be a flat member.

[0032] In the embodiments shown in Figures 6 and 7, the sealing plate 630 has at least one sealing element It is equipped with an element. In this particular exemplary embodiment, at one end of the inactive zone The first sealing element 632 is located, and the second is located at the other end of the inactive zone A sealing element 634 is present. Those skilled in the art will recognize the first and second sealing elements 632,6 34 Compared to an equivalent structure that does not have the sealing element, the through air device has It is clear that it is configured to reduce the inflow of outside air into the vent zone. It is likely that an additional sealing element (not shown) is provided on the outer circumference of the shielding plate 630. It may also be possible. As shown in Figures 6 and 7, in one embodiment, the sealing elements 632, 6 34 is the end position and / or edge of the shielding plate 630. Other embodiments In this, the sealing element may include another part of the fixed structure, and also the front It is also possible that the sealing element does not need to be integrally formed with the fixed structure. Figure 6 As shown in the diagram, and also as described in the detailed diagram in Figure 7, recirculated air or At least one flow that delivers other airflow to at least one sealing element 632, 634 Because the passage 640 is provided, the through-air device 600 can reach the active zone. The in-leakage of outside air is further reduced. As shown in the figure, in one embodiment, the flow path 640 is - Located inside the air roll 610. As will be explained later, in other embodiments, at least At least a portion of the flow path 640, configured to guide air to one sealed element, It may be located outside of the Alor 610.

[0033] As shown in Figures 6 and 7, at least one flow path 640 is located from the first axis 602 It extends radially outward toward the outer circumference of the through-air roll 610. As shown in the figure, the first The flow path 640 extends outward toward the first sealing element 632, and the second flow path 640 is It extends outward toward the sealing element 634 side of 2. In other embodiments, a continuous single flow path 6 40 may be provided. In one embodiment, at least a portion of the flow path 640 is the first axis 60 It can be assumed that it extends along 2 (i.e., the rotational axis of the through-air roll 610). Exhaust or any other system air from the through-air device passes through the flow path along axis 6 The configuration is such that the water flows along 02 and then radially outwards into the sealing elements 632 and 634. The air is defined as follows: As shown by the arrows in Figures 6 and 7, the air is directed through a rotating air roll. It can be guided radially outward toward 610. Also, as shown in the figure, a portion of the air is blocked. It can be guided substantially parallel to the inner surface of plate 630 and uniformly along the periphery of the barrier plate 630. It can be configured to create an air distribution. The flow path 640 blocks the recirculating air from the plate. Dampers or known other so that they can be uniformly distributed to the edges of sealing elements 632, 634 It may be configured to include a flow control device.

[0034] This disclosure provides, for example, third and fourth sealing elements, and directions toward these additional sealing elements. By extending outward, the outside air intake of the through-air device into the active zone A configuration is also conceivable in which there is at least one additional flow path 640 to further reduce the amount of work. In one embodiment, the blocking plate 630 is rectangular in shape, and each of its four side edges A sealing element corresponds to this. At least one flow path 640 is for recirculated air or other They can be configured to deliver airflow to these sealing elements.

[0035] Figures 8 and 9 show other embodiments of the through-air device. Some of the structures in Figures 8 and 9 The components are the same as those described above in relation to the embodiments shown in Figures 6 and 7. Therefore, they are assigned the same reference number.

[0036] Figures 8 and 9 show a thru-energy that is configured to rotate about the first axis 602. A through-air device 700 equipped with an A-ROL 610 (i.e., a rotary web conveying structure) As shown in the diagram, the web 620 is wrapped around the roll 610. The conveying surface 612 has multiple openings to allow air to pass through. The apparatus 700 further transfers the web 620 onto and off the roll 610. It may be equipped with an auxiliary roller 614. The through-air roll 610 is part of the through-air device. It rotates relative to the fixed structure. The specific embodiments disclosed in Figures 8 and 9 are This shows a configuration in which the fixed structure consists of an internal baffle 750. As mentioned above, and as shown in Figures 6 and 7, the inactive zone blocking play The To630 may or may not exist.

[0037] In the embodiments shown in Figures 8 and 9, the baffle 750 is at least a first baffle tight It comprises a sealing element 732 and a second baffle sealing element 734. This exemplary embodiment In this configuration, the first sealing element 732 is located at one end of the inactive zone, and the The second sealing element is located at the other end of the inactive zone. Those skilled in the art will know that the first The second sealing elements 732, 734 are equivalent baffle structures that do not have the said sealing elements. Compared to the above, it reduces the inflow of outside air into the active zone of the through-air device. It should be clear that it is configured as shown in Figure 8 and also in Figure 9. As shown in the detailed diagram, recirculated air or other airflow is connected to at least one dense There is provided at least one flow path 740 that delivers to sealing elements 732, 734. This further reduces the inflow of outside air into the active zone of the through-air device 700. As shown in the figure, in one embodiment, the flow path 740 is located inside the through-air roll 610. As shown in Figures 8 and 9, at least one flow path 740 is located from the first axis 602. It extends radially outward toward the outer circumference of the through-air roll 610. As shown in the figure, the first The flow path 740 extends outward toward the first sealing element 732, and the second flow path 740 is It extends outward toward the sealing element 734 side of 2. In one embodiment, at least A portion extends along the first axis 602 (i.e., the rotation axis of the through-air roll 610). It may be considered to be exhaust or any other system air from the through-air device. However, the fluid flows along the axis 602 within the flow path and then radially towards the sealing elements 732 and 734. A configuration that allows for such output is envisioned.

[0038] As shown in Figures 8 and 9, the sealing elements 732 and 734 are connected to the through-air device 700. A perforated plate, a channel, and a nozzle are configured to generate an air curtain to reduce the intrusion of outside air. It may include at least one of a rib and a slot. In this embodiment, the sealing element 7 32,734 is an air car extending radially outward toward the rotary through-air roll 610. It is configured to generate a tents. In Figures 8 and 9, the sealing elements 732, 734 Such a function is directed toward the rotary through-air roll 610 by the sealing elements 732, 734 It is represented by four parallel arrows extending outward. That is, sealing elements 732 and 734 are A gas communication is established with at least one flow path 740 that delivers recirculated air or other airflow. It may include a flow channel segment 742 (i.e., a flow channel section), as shown in Figures 8 and 9. The flow channel segment 742 may have a rectangular cross-section and a porous surface 744. The porous surface 744 is a through-air roll 610 (i.e., a rotary web conveying structure) Of these, it is approximately parallel to the adjacent conveying surface 612. Air enters such a porous section 74 By being sent through 6, the through-air device 700 to the active zone The inflow of outside air is further reduced. The porous section 746 is sealed by the air curtain elements 732 and 734. A porous plate and / or channel and / or so that it would be understood by those skilled in the art to generate n Or, it is intended to broadly encompass nozzles and / or slots and / or other configurations. As shown in the diagram, the porous portion 746 can be densely packed depending on its external shape in the machine direction or the machine transverse direction. The ability to meet various requirements regarding pressure and airflow at each point along the sealing area is a key feature. Please understand that, in order to achieve the desired effect, the porous portion 746 is configured in various orientations. It may be determined. In addition, in this disclosure, at least one sealing element 732,734 is baffle 7 Another possible configuration is to arrange them along any side edges around the perimeter.

[0039] Next, we will refer to Figure 10, which shows a cross-sectional view of a through-air device 800 according to another embodiment. The through-air device 800 includes a plenum 810 located outside the through-air roll 610. As mentioned above, the through-air roll 610 (i.e., the rotary web conveying structure) is central It is configured to rotate around its axis. As shown in the figure, the roll 610 has a The web 620 is wrapped around it. The apparatus 800 further wraps the roll 610 and the roll 61 It is equipped with rollers 614 to assist in the transfer of the web 620 to the outside. This particular one is shown in Figure 10. In this embodiment, the through-air roll 610 is a fixed structure of the through-air device 800. It rotates relative to the body. The through-air device 800 is in the inactive zone of the device 800. It is equipped with a plenum 810 positioned to cover it. In Figure 10, for simplification, the thru- Of the device 800, other components located inside the through-air roll 610 are omitted. The plenum, as indicated by multiple arrows, allows recirculated air or other airflow. It has at least one channel 840 that delivers to at least one plenum sealing element 832. In one embodiment, the perforated plate 844 of the sealed plenum 810 is the web transport structure The non-active part of the through-air device 800 within the body (i.e., through-air roll 610) The outer portion occupying the tibb zone has opposing surfaces spaced apart. Sealed plenum 810 However, at least one channel for delivering recirculated air or other airflow (for example, Figure 6) The air is in gas communication with the flow paths 640, 740, etc. shown in Figure 8, allowing air to pass through the porous plate 844. By passing through and being delivered to the inactive zone, in front of the through-air device 800 The inflow of outside air into the active zone is further reduced. As mentioned above, the perforated plate 746 and The term is understood by those skilled in the art to mean that the sealing element 832 will generate an air curtain. Porous plates and / or flow channels and / or nozzles and / or slots and / or It is intended to broadly encompass other configurations, the porous portion and adjacent to it. By changing the orientation configuration of the rotary through-air roll 610, along the sealing area Please understand that various airflow conditions can be set.

[0040] Figures 11 and 12 show one embodiment of the through-air device 900. 00 comprises a plurality of exhaust duct sealing elements 932, 934. In this embodiment, through-e The Alor 610 rotates relative to at least one exhaust duct 910. Normally, The air duct 910 is located at one end of the device 900 and is inside the through air roll 610. The stem air is drawn out from the device 900 and drawn into the conduit / duct 170. It has been done. Figure 11 shows two exhaust duct sealing elements 932 and 934 located at one end. This is a side view cross-sectional view of the through-air device 900. In one embodiment, the exhaust duct sealing required Elements 932 and 934 may be circular in shape (i.e., donut-shaped). In other embodiments, These exhaust duct sealing elements 932, 934 may have a different geometric shape, for example, It may include curved and / or straight portions. As shown in the figure, in addition to the apparatus 900 At the ends, elements identical to the exhaust duct sealing elements 932 and 934 may be provided. As mentioned above. A space / gap may exist between the rotary through-air roll 610 and the exhaust duct 910. The exhaust duct sealing elements 932 and 934 reduce the intrusion of outside air into the through-air device 900. It is configured in such a way.

[0041] For simplicity, the through-air device 900 is located inside the through-air roll 610. Other components are omitted from the illustration. Exhaust duct sealing elements 932, 934 are through- To reduce the intrusion of outside air into the device 900, air (from any of the aforementioned supply sources) is exhausted. In communication with a gas flow path that delivers to duct sealing elements 932, 934 It is possible. As indicated by the arrow, recirculated air or other airflow can be directed to at least one exhaust. There is at least one flow path that delivers to the duct sealing elements 932, 934. In this embodiment shown in Figures 11 and 12, elements 932 and 934 are located outside the roll 610. It is clear that these flow paths may also exist outside the roll 610. This is in contrast to the flow paths 640 and 740 shown in Figures 6 to 8, which are located inside the roll.

[0042] Furthermore, if the aforementioned porous portions are provided in the exhaust duct sealing elements 932 and 934, a through-air device can be created. It can also be seen that the inflow of outside air into the 900 can be further reduced. As mentioned above. The term "porous section" refers to the fact that the sealing elements 932 and 934 will generate an air curtain. A perforated plate and / or channel and / or nozzle and / or It is intended to broadly encompass slots and / or other configurations.

[0043] Figure 13 shows a side view cross-section of a through-air device 1000 according to yet another embodiment of the present disclosure. This is a diagram. The through-air device 1000 consists of multiple radial exhaust duct sealing elements 932, 93 It is equipped with 4. In this embodiment, the through air roll 610 has at least one exhaust d It rotates relative to the ct 910. Unlike the embodiment shown in Figure 11, in this embodiment, The end cap of the through-air roll 610 is closed. As shown in the diagram, normally the exhaust duct T910 is located at one end of the device 1000, and the system air is (through air roll 6 (As shown by the arrows along the length of 10) it passes through the web transport structure and through air roll 6 It is drawn out from 10 (as indicated by the arrow on the exhaust duct 910 side) to exhaust duct 910. It is configured to be drawn into the conduit / duct 170 (shown in Figures 1 to 5). In 13, two exhaust duct sealing elements 932 and 934 are located at one end of the device 1000. This depicts the state. In one embodiment, radial exhaust duct sealing elements 932, 934 It can be circular (i.e., donut-shaped), but as mentioned above, other shapes and geometric shapes are also possible. Many shapes are possible. As mentioned above, a rotary through-air roll 610 and an exhaust duct 910. A space / gap may exist between them. The radial exhaust duct sealing elements 932, 934 are It is configured to reduce the intrusion of outside air into the Lueair device 1000.

[0044] For simplicity, the through-air device 1000 is located inside the through-air roll 610. Other components are omitted from the illustration. Radial exhaust duct sealing elements 932, 934 are To reduce the intrusion of outside air into the through-air device 1000, air (from any of the aforementioned sources) At least one passage and air that delivers air to the radial exhaust duct sealing elements 932, 934 They may be interconnected. As indicated by the arrows inside sealing elements 932 and 934, recirculating air Air or other airflow into at least one radial exhaust duct sealing element 932, 934 There is at least one delivery channel. Sealing elements 932, 934 are roll 610 In this embodiment shown in Figure 13, which is located outside the roll 610, those flow paths are also located outside the roll 610. The point that one will gain is obvious.

[0045] This disclosure also describes an embodiment of a through-air device equipped with a flow-through roll. 14 is a through-air device 1100 according to one embodiment, which has an outward flow-through arrangement configuration. Figure 15 is a cross-sectional view of the same configuration, and Figure 15 shows another embodiment of the same configuration consisting of an inward flow-through arrangement. This is a cross-sectional view of the Lueair device 1200.

[0046] The outward flow-through configuration shown in Figure 14 includes a through-air device 1100. The air device 1100 includes a through-air roll 610, an exhaust plenum 1150, and a web 62 The hood 1130 extends around the winding portion in the 0-angle direction and the through-air roll 610. It is equipped with the above. As mentioned above, the through-air roll 610 (i.e., rotary web conveying structure) The ) is configured to rotate about a central axis. Embodiment disclosed in Figure 10 Similarly, the web 620 is wrapped around the roll 610. The apparatus 1100 further Rollers 614 assist in the transfer of the web 620 onto and off the roll 610. It is equipped with. In this particular embodiment shown in Figure 14, the through air roll 610 is through - Of the air device 1100, (fixed exhaust plenum 1150, rotating roller 614 It rotates relative to another structure (such as the hood 1130). In Figure 14, for simplification, , other components located inside the through-air roll 610 of the through-air device 1100 The basic form is omitted.

[0047] In Figure 14, the system air pathways are shown with open arrow heads. As shown in the diagram, the system air is connected to the plenum 1150 positioned between the two rollers 614. It passes through and moves downward, entering the through-air roll 610. The system air flows outward through the web conveying structure of the through-air roll 610. ru.

[0048] As described above, this disclosure relates to a through-air device that reduces the intrusion of outside air into the through-air device. It comprises at least one flow path configured to guide air to at least one sealed element of the structure. It is directed towards the point of being able to. In this particular embodiment, the through-air device 1100 This is an exhaust plenum sealing element located on top of the plenum 1150, adjacent to the roller 614. It is equipped with 1132. In Figure 14, these channels that guide air to at least one sealing element The path is indicated by sharp arrows (closed arrow heads). As shown in the diagram, for example, through To reduce the intrusion of outside air into the air device 1100, the inside of the exhaust plenum sealing element 1132 A flow path may exist. Such a flow path is inclined toward the roll 614, as indicated by the arrow. It may be oblique. In one embodiment, such a flow path extends in the direction transverse of the machine. As shown in Figure 14, both the exhaust plenum 1150 and the through-air roll 610 are located inside the exhaust plenum 1150 and outside the through-air roll 610. A flow path may also exist inside the hood 1130 located around the periphery.

[0049] As indicated by multiple sharp arrows, the exhaust plenum 1150 and hood 1130 recirculate A circulating air or other airflow is directed into at least one plenum sealing element 1132, 1134. It has at least one passage for delivery. As mentioned above, the exhaust plenum 1150 and The hood 1130 has at least one flow path for delivering recirculated air or other airflow By being in gas communication with the through-air device 1100, the inflow of outside air into the through-air device 1100 is reduced. Air is then sent through the passage. The sealing elements 1132 and 1134 are outside the roll 610. In this embodiment shown in Figure 14, those flow paths may also be located outside the roll 610. That point should be clear.

[0050] The inward flow-through configuration shown in Figure 15 includes a through-air device 1200. The air device 1200 is substantially the same as described above in relation to the embodiment shown in Figure 14 (with reference numerals). (i) It has components. The difference is that the direction of the system airflow is reversed. Specifically, in Figure 15, the path of the system air is shown by an open arrow. As shown in the diagram, the system air is distributed between the rollers 614 through the through-air roll 610. The exhaust proceeds upward into the exhaust plenum 1150. The embodiment shown in Figure 15 is shown in Figure 10. It is somewhat similar to a plenum configuration.

[0051] In Figure 15, as indicated by multiple sharp arrows, the exhaust plenum 1150 is connected to the recirculated air. Alternatively, deliver other airflow to at least one exhaust plenum sealing element 1132, 1134. It has at least one flow path for recirculating air or By being in gas communication with at least one passage that delivers other airflow, through-air equipment Air is sent through the passage to reduce the inflow of outside air to the unit 1200. In this embodiment shown in Figure 15, the sealing elements 1132 and 1134 are located outside the roll 610. It is clear that these flow paths may also exist outside of the roll 610. This is in contrast to the flow paths 640 and 740 shown in Figures 6 to 8, which are located inside the roll.

[0052] Next, refer to Figure 16. This figure shows a web transport structure configured to move in translational motion. An embodiment of a through-air device equipped with the following is depicted. Specifically, Figure 16 shows the It can be configured as a through-air drying device (TAD) or a through-air bonding device (TAB). This is a cross-sectional view of one embodiment of a through-air device 1300 having a rat bed configuration. Then, the principle itself is the same as the embodiments described above, but the configuration is configured to rotate. Figures 6 to 15 show the web transport structure configured as a through-air roll. Unlike the other, the embodiment disclosed in Figure 16 is a web carrier, which is a flatbed belt 1310. It differs in that it is directed towards the transmission structure. In one embodiment, a flat bed bell T1310 is a mesh / screen that can consist of metal strands or synthetic strands. It is a water-based material. In the embodiment shown in Figure 16, the flatbed belt 1310 is made of water It is configured to move in translational motion along a plane. In another embodiment, flatbed It is also conceivable that the Dobert 1310 be configured to perform translational motion along an inclined surface. The web is placed on the flatbed belt 1310, and the flatbed belt 1310 It is moved like a conveyor belt. As shown in Figure 16, the through air device 1300 Among these, components such as the adjacent upper plenum 1330 are through-air device 1300 It comprises at least one sealing element 1332 configured to reduce the intrusion of outside air into it. Furthermore, as shown by the arrows in Figure 16, outside air intrusion into the through-air device 1300 The less air is directed to at least one sealing element 1332 to reduce the amount of air entering. A single channel is also provided.

[0053] Furthermore, many of the components of the previously described through-air device that were said to be equipped with a sealing element This may have been described as if it were stationary in relation to a moving web transport structure, but The disclosure is not limited to this, and the above concept applies to through-air devices that include a sealing component. Even components that can be made movable (configured to move in rotational and / or translational motion) The applicability should be clear. A through-air device where the two components are movable relative to each other. Even in this case, outside air leakage can occur, so this disclosure relates to a stationary state with a sealing element. It can be directed towards either the constituent elements or the movable elements.

[0054] Furthermore, as mentioned above, among the through-air devices, the components equipped with a sealing element are, It can be placed inside the web conveying structure (for example, inside the through-air roll 610, as shown in Figure 6). ~Such as the shielding plate sealing elements 632, 634 and baffle sealing elements 732, 734 shown in Figure 9. ), and / or, among the through-air devices, the component equipped with a sealing element is It can be placed outside the conveying structure (for example, outside the through-air roll 610, as shown in Figure 1). (Examples of plenum sealing elements 832 and exhaust duct sealing elements 932, 934 shown in Figure 12).

[0055] Furthermore, as those skilled in the art will know, in one embodiment, the aforementioned through-air device is a through-air drying device. It may also be applied to a through-air bonding device as described above in another embodiment. The fact that it may apply to is clear from the absence of such limitations in this disclosure. cormorant.

[0056] Each aspect of this disclosure is directed to a method for operating a through-air device. The method is described as follows: The steps of placing the web on a part of the web transport structure and the web being placed on the web transport structure The method includes the step of moving the web transport structure so that it moves together with the body. The first component comprises at least one sealing element adjacent to the web transport structure. The element is such that the at least one sealing element of the first component is the through-air device The steps include preparing a first component configured to reduce the intrusion of outside air into the location, and , to reduce the intrusion of outside air into the through-air device, air is provided in at least one sealing element. The step of guiding air includes, To reduce the intrusion of outside air into the air intake system, heated air is supplied to at least one of the sealing elements. The process includes a step of guiding the airflow. In other embodiments, the unheated airflow guides the at least one sealing element It can be led to.

[0057] In one embodiment, the web transport structure is a through-air roll, and the method is the The web is wrapped around the angular portion of the through-air roll, and the actuaries of the through-air device The steps of forming an active airflow zone and an inactive airflow zone, and the web The through-air roll rotates together with the through-air roll, with the first axis as the axis of rotation. The steps include rotating the web transport structure. In other embodiments, the web transport structure is on a horizontal plane. Alternatively, it is a flatbed belt configured to move in translational motion along an inclined surface.

[0058] In one embodiment, the first component includes an exhaust duct and an exhaust duct sealing element. The air is directed to the exhaust duct sealing element in such a way that it reduces the intrusion of outside air into the through-air device. To be guided.

[0059] In other embodiments, the first component is an internal baffle and an inactive zone blockade. The system includes a plate, and air is directed to the barrier plate to reduce the intrusion of outside air into the through-air device. It is led to a sealing element.

[0060] In yet another embodiment, the first component includes a plenum, and the through-air system To reduce the intrusion of outside air into the space, air is directed through the plenum to at least one sealing element. To be led there.

[0061] This disclosure describes second and third configurations of the through-air device comprising an additional sealing element. Elements may be present, and air may be present in order to reduce the intrusion of outside air into the through-air device. Please understand that configurations involving sealing elements are also possible.

[0062] Furthermore, in one embodiment, the air guided to the at least one sealing element is This may also be system air recirculated from another part of the through-air device. This point should be clear. In other embodiments, the at least one sealing element is guided The aforementioned air is the exhaust flow of the Yankee Hot Air System, the exhaust flow of the vacuum pump, and the Turbine. The source may be the exhaust flow of the air, or at least one of any other heated airflow. In yet another embodiment, the air is guided to the at least one sealing element. This may be supplied from an unheated air source.

[0063] Furthermore, the above concept relates to the control of the humidity level of the system air within the through-air device and It should be clear that it can be used for adjustment.

[0064] Although several embodiments of the present invention have been illustrated and described herein, those skilled in the art will understand the present invention. Features described in the sub-document and / or results described herein and / or one or more benefits Various other means and / or structures for obtaining points can be immediately assumed. Such modifications and / or alterations shall be considered within the scope of the present invention. Those skilled in the art will understand the present invention. Many equivalents to the specific embodiments of the present invention described in the details are obvious or This can be determined within the scope of routine experiments. Therefore, the above-described embodiment is an example. This is merely an illustration, and the present invention is not limited to the appended claims and equivalents thereof. Within the category of goods, being carried out in a form other than that described and specifically explained in the claims. Please understand that there are also the individual components and / or It is directed towards systems and / or articles and / or materials and / or methods. Furthermore, such configurations and / or systems and / or articles and / or materials and / or methods are not contradictory to each other, two or more such configurations and / or or any combination of systems and / or articles and / or materials and / or methods However, this falls within the scope of the present invention.

[0065] All definitions established and adopted herein are taken from dictionary definitions and / or references. The definitions in each cited document and / or the common meanings of each defined term take precedence over the usual meanings of the terms. I hope you understand this.

[0066] The indefinite articles "a" and "an" used in this specification and in the claims are not special indications. Unless otherwise specified, please understand that this means "at least one..."

[0067] The terms "and / or" and "and / or" as used in this specification and in the claims. The phrase "either one or both" of the connected elements, that is, each element is It should be understood that this refers to both cases where both are present and cases where only one is present. Unless otherwise indicated, each of the terms "and / or" or "and / or" specifically refers to the terms used. In addition to the element, there may be other elements, whether or not they are related to the element in question. It's okay to do so.

[0068] All documents, patents, patent applications, and publications cited or referenced herein are entirely their own. The body is incorporated herein by reference.

Claims

1. Through-air device for drying or bonding paper webs, tissue paper webs, or nonwoven fabric webs. And, A web transport structure configured to move, A first component comprising at least one sealing element adjacent to the web transport structure. The at least one sealing element reduces the intrusion of outside air into the through-air device. A first component is configured in such a way, To reduce the intrusion of outside air into the through-air device, air is supplied to at least one sealing element. A channel configured to guide at least one flow path, A device equipped with the following features.

2. In the apparatus according to claim 1, the first component becomes a fixed component. The web transport structure is configured such that the first component to which it is fixed is fixed. A movable device.

3. In the apparatus according to claim 1, the web transport structure rotates about a first axis. A device consisting of a through-air roll configured to rotate.

4. The apparatus according to claim 3, wherein the first component and the at least one seal An apparatus in which the element is located within the through-air roll.

5. The apparatus according to claim 1, wherein the first component includes one or more exhaust ducts, The at least one sealing element includes at least one exhaust duct sealing element, and the at least At least one flow path reduces the intrusion of outside air into the through-air device. A device configured to guide air into one exhaust duct sealing element.

6. In the apparatus according to claim 3, the through-air device comprises an active zone and a non-active zone. It has an active zone, and the first component has an internal baffle and the through-e A includes an inactive zone blocking plate provided in the inactive zone of the device, The at least one sealing element includes at least one sealing plate element, At least one flow path provides outside air from the inactive zone to the through-air device. The configuration is configured to guide air to the at least one sealing element of the barrier plate in order to reduce the intrusion of air. A device that is being used.

7. In the apparatus according to claim 6, further, A second component comprising at least one sealing element adjacent to the through-air roll. The at least one sealing element of the second component is the through-air device A second component is configured to reduce the intrusion of outside air into it, To reduce the intrusion of outside air into the through-air device, the second component of the at least A flow path configured to guide air into one sealed element, Equipped with, The second component includes one or more exhaust ducts, and the second component has at least one exhaust duct. Each sealing element includes at least one exhaust duct sealing element, and the at least one The flow path reduces the intrusion of outside air into the through-air device by the at least one exhaust duct A device configured to guide air into a sealed element.

8. In the apparatus according to claim 1, the at least one flow path is the at least one The system air from another part of the through-air device is recirculated to the sealing element. A device configured in such a way.

9. In the apparatus according to claim 1, the at least one flow path is Yankee hot air System exhaust flow, vacuum pump exhaust flow, turbine exhaust flow, and any other heating The heated air from at least one of the airflows is directed to the at least one sealing element. A device configured in such a way.

10. In the apparatus according to claim 3, the through-air device comprises an active zone and a non-active zone. It has an active zone, and the first component is the active of the through air device Includes a plenum configured to cover the active zone or the inactive zone, At least one passage in the plenum reduces the intrusion of outside air into the through-air device. A device configured to guide air to at least one sealing element via a [vehicle].

11. In the apparatus according to claim 1, the first component is the at least one sealing element It includes at least one of a perforated plate, nozzle, channel, and slot for distributing air. ,Device.

12. In the apparatus according to claim 3, the at least one flow path is the through-air roll A device having a flow channel section located inside.

13. In the apparatus according to claim 1, the airflow through the channel is the at least one dense The fan speed and damper position can be adjusted so that the air can be uniformly distributed to the sealing element. Adjustment of the position, adjustment of the variable flow rate regulating unit in the flow path or the sealing element itself, or other A device controlled by adjusting its means.

14. In the apparatus according to claim 3, at least a portion of the flow path is along the first axis A device that extends outwards.

15. In the apparatus according to claim 3, at least a portion of the flow path is located in front of the first axis. A device that extends radially outward toward the outer circumference of the through-air roll.

16. In the apparatus according to claim 1, air is further supplied to the at least one sealing element under pressure. A device equipped with a fan configured to do so.

17. In the apparatus according to claim 1, the web transport structure is along a horizontal plane or an inclined plane. A device consisting of a flatbed belt configured to perform translational motion.

18. Through-air device for drying or bonding paper webs, tissue paper webs, or nonwoven fabric webs. A method for making it work, The steps include: placing the web onto a part of the web transport structure, The web moves together with the web transport structure. Step and, A first component comprising at least one sealing element adjacent to the web transport structure. The first component, the at least one sealing element, is the through-air device The steps include preparing a first component configured to reduce the intrusion of outside air into, To reduce the intrusion of outside air into the through-air device, air is provided in at least one sealing element. Steps to guide the energy, A method that includes [a certain feature].

19. In the method according to claim 18, the step of introducing air is performed in the through-air device A step of directing heated air to at least one sealing element to reduce the intrusion of outside air. Includes, method.

20. In the method according to claim 18, the first component becomes a fixed component. The web transport structure is configured such that the first component to which the web transport structure is fixed is fixed. A method that is movable.

21. The method according to claim 18, wherein the first component includes one or more exhaust ducts The at least one sealing element includes at least one exhaust duct sealing element, and air The guiding step reduces the intrusion of outside air into the through-air device, at least A method comprising the step of directing air into one exhaust duct sealing element.

22. In the method according to claim 18, the web transport structure is a through-air roll, This method further, The web is wrapped around the angular portion of the through-air roll, and the through-air device The steps of forming an active airflow zone and an inactive airflow zone, The web rotates together with the through-air roll around the first axis Steps to rotate the through-air roll, A method that includes [a certain feature].

23. In the method according to claim 22, the first component comprises an internal baffle and the S The inactive zone blocking plate provided in the inactive zone of the Luair device Including, the at least one sealing element includes at least one sealing plate element The step of introducing air to the through-air device from the inactive zone A stile that guides air to the at least one sealing element of the barrier plate in order to reduce the intrusion of outside air. Methods, including the top.

24. The method according to claim 23, further, A second component comprising at least one sealing element adjacent to the through-air roll. The second component, the at least one sealing element, is the through-air device The steps include preparing a second component configured to reduce the intrusion of outside air into, To reduce the intrusion of outside air into the through-air device, the second component is configured to have at least Another step is to guide air into another sealed element, Equipped with, The second component includes one or more exhaust ducts, and the second component has at least one exhaust duct. Each sealing element includes at least one exhaust duct sealing element, and the ste that guides the air The top reduces the intrusion of outside air into the through-air device by the at least one exhaust dart A method comprising the step of introducing air into a sealed element.

25. The method according to claim 18, wherein the air is guided to the at least one sealing element. The step is relative to the at least one sealing element, and to another part of the through-air device. A method comprising the step of recirculating system air from the system.

26. In the method according to claim 19, a spool is provided to guide heated air to at least one of the sealing elements. The steps include the exhaust flow of the Yankee hot air system, the exhaust flow of the vacuum pump, and the turbine exhaust. The heated air from the airflow and at least one of the other arbitrary heated air flows, A method comprising the step of flowing into at least one sealed element.

27. In the method according to claim 22, the first component is the through air device Includes a plenum configured to cover the active zone or the inactive zone. The step of introducing air to the through-air device from the inactive zone To reduce the intrusion of outside air, air is allowed to enter the at least one sealing element via the plenum. A method that includes the steps to guide you.

28. The method according to claim 22, wherein a step for introducing air to the at least one sealing element A method comprising the step of flowing air through a passage inside the through-air roll.

29. In the method according to claim 28, at least a portion of the flow path is along the first axis That's the method that's being extended.

30. In the method according to claim 28, at least a portion of the flow path is from the first axis A method comprising extending radially outward toward the outer circumference of the through-air roll.

31. The method according to claim 18, wherein the at least one sealing element is a porous plate, a flow path, The sealing element includes at least one of a nozzle and a slot. By guiding air, an air curtain is created to reduce the intrusion of outside air into the through-air device. The method of accomplishing something.

32. The method according to claim 18, wherein the web transport structure is along a horizontal or inclined surface A flatbed belt configured to perform translational motion, as described above.

33. Through-air device for drying or bonding paper webs, tissue paper webs, or nonwoven fabric webs. And, a) A rotary web transport structure having multiple openings to allow air to pass through The transport surface, as well as the angular active and inactive zones of the web transport structure. The active zone is defined as the active airflow zone and the inactive zone of the through-air device. A rotary web transport structure having a web winding angle that forms an airflow zone, b) A fixed structure which is the object of relative rotation of the rotary web transport structure, and which is at least It also comprises one sealing element, and the at least one sealing element is the at least one Compared to an equivalent structure that does not have a sealing element, the active element of the through-air device A fixed structure configured to reduce the inflow of outside air into the airflow, c) Delivering recirculated air or other heated airflow to one or more of the sealing elements. This further reduces the inflow of outside air into the active zone of the through-air device. so, at least one flow path, A through-air device equipped with this feature.

34. In the through-air device according to claim 33, the fixed structure is further non-active It comprises a b-zone blocking plate and at least one inactive zone sealing element, and The at least one flow path for delivering circulating air or other heated airflow is the at least A through-air device that delivers air to at least one inactive zone sealing element.

35. In the through-air device according to claim 33, the fixed structure further comprises at least One exhaust duct or plenum, and at least one exhaust duct sealing element or plenum The least Each of the two flow paths connects to at least one exhaust duct sealing element or plenum sealing element. A through-air device that delivers air.

36. In the through-air device according to claim 33, the heated air flow is a preheating outside air, a turbine Exhaust from a Yankee hot air system, exhaust from a vacuum pump, paper machine or papermaking machine. Through, including other heated airflows in a factory environment, or any other heated air source. Air device.

37. In the through-air device according to claim 33, the flow to at least one sealing element The amount of heated air is controlled by adjusting the fan speed, adjusting the damper position, and the variable flow within the delivery channel. Controlled by adjusting the volume control unit or the sealing element itself, or by adjusting other means. A through-air device.

38. In the through-air device according to claim 33, the at least one sealing element is recirculating The at least one flow path that delivers circulating air or other heated air flow is in gas communication with Including a flow channel segment, the flow channel segment is part of the rotary web transport structure, It has a porous surface adjacent to the aforementioned conveying surface, which allows recirculated air or As other heated air flows are sent through the porous portion, in front of the through-air device, A through-air system that further reduces the inflow of outside air into the active zone.

39. In the through-air device according to claim 33, the fixed structure further comprises the web Between the outer part of the conveying structure that occupies the inactive zone of the through-air device It comprises a sealing plenum having opposing perforated plate surfaces separated by a gap, and the sealing plenum is The at least one flow path that delivers circulating air or other heated air flow is in gas communication with the As a result, the heated air is delivered to the inactive zone through the porous plate. As a result, the in-leakage of outside air into the active zone of the through-air device is reduced. Further reductions are achieved with the through-air device.

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