JPH03500790A - Method of drying a web traveling through the dryer section of a paper machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] '-Year 8 device Departing Hall 1 2JL 23 Shadow and separate column The present invention relates to a dryer section apparatus for drying a web extending therethrough. . In particular, the present invention includes a plurality of lower dryer drums and a plurality of upper dryer drums. The present invention relates to a device having the following.

1st report Sarasui ■Record loss When the formed web emerges from the press section of the paper machine, the formed web It still contains a large amount of water. The web passes through the drying section of the paper machine In the meantime, most of this moisture is removed from the formed web. part of the dryer usually has multiple dryer drums, and across those drums, a pre-formed The web grows. When the web is in close contact with the heated outer surface of the dryer drum, the web is heated so that at least a portion of the moisture contained therein is removed from the web. Ru.

The so-called “uni run” or “uno run” “A dryer section typically has an upper and a lower dryer drum. Ru. Each upper and lower stage consists of a plurality of heated, rotating dryer drums. upper and lower The felt stretches in a meandering shape alternately between the dryer drums. The web is Alternating physical contact with each heated surface of the dryer drum during passage through the dryer section is pressed into contact with the While the aforementioned system passes through the dryer section, Felt provides support for the web, but such traditional systems: It has the following drawbacks.

First, each of the alternately arranged dryer drums has a heating surface of the dryer drum. The web is part of the dryer because it has a supporting felt placed between the web and Alternate physical contact is made only with each heated dryer drum during the passage of minutes. No. 2, with the felt placed between the web and the heating surface of the dryer drum. , as the web stretches around the dryer drum, the web is thrown by centrifugal force. The web is separated from the felt by a pneumatic wedge at the nip. Tend.

Therefore, the present invention provides upper and lower dryer drums having a unique configuration. It thus overcomes the aforementioned problems associated with prior art devices. Traditional ° Unlike the "Niran" system, the present invention has separate upper and lower felts; The upper felt is curved between the upper dryer drum and the upper intermediate roll. Make sure to rotate around it alternately so that it stretches. Similarly, the bottom felt is Stretching alternately between the dryer drum and the lower intermediate roll. This device has upper and Every other intermediate roll of the lower rain intermediate roll is covered with both felt and web. It is designed to be rolled up. Such an arrangement allows the web to connect to each adjacent Open draw extends between the upper and lower dryer drums. Therefore, the web passes in close contact with the heating surface of each upper and lower dryer drum. pass Furthermore, due to the unique configuration mentioned above, the adjacent upper dryer drum and lower The distance that the web travels unsupported between the dryer drum and the dryer drum is minimized. Ru.

It is therefore a first object of the present invention to overcome the aforementioned drawbacks of conventional devices and to Not only does the web come into close contact with the heated surface of each dryer drum, but it A device that minimizes open draw between the ear drum and the lower dryer drum. It is an object of the present invention to provide a dryer partial device that provides a

Another object of the invention is that every other lower intermediate roll is connected to the web. Each lower intermediate roll guides both lower felts into the adjacent lower dryer. It is an object of the present invention to provide a dryer partial device disposed between yard drums.

Another object of the invention is that every other upper intermediate roll is By guiding both the web and the felt, the web multiple upper dryer drums for open draw between the dryer drum and the lower dryer drum. Each of the intermediate rolls is positioned between adjacent upper dryer drums, thereby Minimize open draw length, upper dryer drum and lower dryer This prevents the web from fluttering while being sent between the web and the ram. It is an object of the present invention to provide a dryer partial device.

Another object of the invention is to provide a driver in which the upper and lower intermediate rolls are vacuum rolls. An object of the present invention is to provide an ear part device.

Another object of the invention is that each of the upper and lower intermediate rolls is a grooved roll. It is an object of the present invention to provide a partial dryer device.

Another object of the invention is that each lower intermediate roller guides both the web and the felt. the first roll against the upper intermediate roll only partially surrounded by the upper felt. It is an object of the present invention to provide a dryer partial device arranged at a distance of . beneath Each of the lower intermediate rolls partially surrounded by felt only has a web and an upper felt at a second distance from an adjacent upper intermediate roll partially surrounded by both and the second distance is equal to or greater than the first distance.

Another object of the invention is that each intermediate part surrounded by felt and web The roll forms pockets, and within each pocket a blow box is placed. Dry dryer that ventilates each pocket and eliminates boundary air flowing into the pocket. It is an object of the present invention to provide a partial device.

Another object of the invention is to have a plurality of doctor blades, each blade having its own The upper and lower drums are connected so that each blade is in contact with the non-wrapping surface of each drum. Provides a dryer partial device that cooperates with the corresponding dryer drum of the ear drum It is to be.

Another object of the present invention is to eliminate the influence of external airflow to improve the doctor brake. By providing a dryer section device that allows the blade to help stabilize the web. be. These blades also perform web threading without the use of ropes. It helps guide the tail of its web during the process.

Another object of the invention is that each lower part is only partially surrounded by the lower felt. Providing a dryer partial device with a duct located near the intermediate roll That is. The duct is an adjacent duct formed between the upper felt and the lower felt. Blow air through the bottom felt to ventilate the ryer pocket.

Another object of the invention is that each upper part is only partially surrounded by the upper felt. It has a ventilation means placed near the intermediate roll, and the ventilation means Ventilates air from the adjacent dryer pocket formed between the and bottom felt In order to It is to provide.

Other objects and advantages of the present invention will be apparent from the detailed description that follows in connection with the accompanying drawings. will become clear to those skilled in the art.

Kodokoro Shoyo Beans The present invention relates to a dryer part apparatus and method for drying a web extending therethrough. Regarding the law. This equipment consists of multiple lower dryer drums and multiple upper dryer drums It has a drum. This equipment is designed for each lower dryer of multiple lower dryer drums. - has a lower felt that partially surrounds the drum. This device also has multiple lower middle each lower intermediate roll has intermediate rolls, and each lower intermediate roll is connected to every other lower intermediate roll. Adjacent lower dryer so that the roller guides both the web and the lower felt. placed between the rams. The top felt is attached to each top door of multiple top dryer drums. It partially surrounds the lyre drum. This equipment has multiple upper intermediate rolls, one Each upper intermediate roll positioned at the same time guides both the web and the upper felt. This allows the web to connect the adjacent upper and lower dryer drums. the length of the open draw is minimized, thereby minimizing the length of the open draw. , while being transferred between the upper and lower dryer drums. Each upper intermediate roll is placed between adjacent upper dryer drums to prevent flapping. Placed.

In certain embodiments of the invention, the lower felt is a When hot, the web is pressed against the lower drum so that it dries. so that it makes physical contact with the lower dryer drum. Lower flap The belt curves between each adjacent lower dryer drum and each lower intermediate roll. Stretch in a twisted shape. Every other one guiding both the web and the bottom felt The lower intermediate roll is a part of the upper intermediate roll that is partially surrounded by the upper felt only. placed nearby. Each of the every other lower intermediate rolls is a vacuum roll.

Each of the lower intermediate rolls, which guide both the web and the lower felt, positioned at a first distance relative to the upper intermediate roll, which is partially surrounded by Ru. Each lower intermediate roll, which is partially surrounded only by the lower felt, has a web and an upper a second distance relative to an adjacent upper intermediate roll partially surrounded by both felts; It is placed after. The second distance is equal to or greater than the first distance. It is arranged so that

each lower intermediate roll and upper felt partially surrounded by a lower felt and a web; and each upper intermediate roll partially surrounded by a web form a pocket. each Each of these points is used to ventilate the pocket and remove boundary air entering the pocket. A low box is placed inside the box.

When the upper dryer drum is heated, the wafer is pressed against the upper dryer drum. The top felt presses against the web so that the web dries. – Make physical contact with the drum. The top felt is attached to each adjacent top driver. It extends in a meandering manner between the ear drum and the upper intermediate roll.

Every other upper intermediate roll guiding both the web and the upper felt is placed adjacent to the lower intermediate roll partially surrounded by the lower felt only. and every other upper roll is a vacuum roll.

This device also has multiple doctor blades, each blade having a of the upper and lower dryer drums so that they are in contact with the non-surrounding side of each drum. Works together with the corresponding dryer drum. These blades are unaffected by outside air currents. Not only does this stabilize the web, but it can also be used without ropes. Orient the tail of the web while threading it through the machine.

A duct is placed near each lower intermediate roll that is only partially surrounded by the lower felt. will be placed. This duct is located between the upper felt and the lower felt. Blow air through the bottom felt to ventilate the dryer pocket.

Adjacent to each upper intermediate roll only partially surrounded by the upper felt, a ventilation hand The steps are arranged. This ventilation means is formed between the upper felt and the lower felt. Empty through the top felt to vent air from the adjacent dryer pocket Blow out your energy.

In another embodiment of the invention, the vacuum roll is replaced by a grooved roll. ing.

As explained in the above description, the present invention provides that the vacuum roll is a grooved roll in the middle. Although intermediate roles have been shown, the invention is not limited to such roles. Instead, use pocket ventilation rolls, pentro rolls, rolls with some grooves, etc. You can also do it. The present invention has been described with particular reference to the detailed description that follows. However, without departing from the spirit and scope of the claims, Various modifications may be made and such modifications are intended to be included within the scope of the invention. This will be obvious to those skilled in the art.

Four Bloods n Kuruma Hoshi Escape Figure 1 shows the upper felt and the lower felt, with the web adjoining the upper dryer. – Extending the long distance between the drum and the lower dryer drum with an open draw 1 is a side view of a portion of a conventional dryer showing the Figure 2 is a drawing similar to Figure 1, but within a given length of a portion of the dryer. To increase the number of dryer drums placed, the upper dryer drums can be moved together How this is approached is shown in the conventional arrangement of FIG.

Figure 3 shows that the vertical distance between the upper and lower dryer drums has been shortened. The web moves between the upper dryer drum and the lower dryer drum. The so-called “squat type” driver is designed to shorten the holding distance. Shows part of the ear.

This drawing also shows that the distance between adjacent upper dryers has been increased, thereby The number of dryer drums placed within a given length of a dryer section is reduced. Indicates the status of

FIG. 4 is a cross-sectional view of a partial dryer device according to the invention showing an "approach" arrangement; minimize the distance between adjacent upper dryer drums and Minimize the distance the web travels unsupported between the upper and lower dryer drums Indicates the state of

FIG. 5 is a drawing similar to FIG. 4, and shows a distance D6 that is equal to distance D7.

The same reference numerals indicate the same parts throughout the drawings.

Plate ■Kongumi Sasetsho FIG. 1 is a side view of a portion of a conventional dryer, generally designated 10, with an upper flap. The felt 12 and the lower felt 14 are shown, and the web W is connected to the adjacent upper dryer drum. A long distance between the dryer drum 16 and 18 and the lower dryer drum 20 is opened. Extend by drawing.

As shown in FIG. 1, the upper felt 12 is Instead of extending around the lower drum 20, it extends around the intermediate roll 22. Rotate and expand. Similarly, the lower felt 14 goes around the lower intermediate roll 24; It then extends in a meandering manner around the lower dryer drum 20 and The drum W is disposed between the lower felt 14 and the outer surface 26 of the lower dryer drum 20. make it possible to do so. The lower felt 14 then passes through another lower intermediate roll 28 It goes around and extends.

Figure 2 is a drawing similar to Figure 1, but within a given length of the dryer section. In order to increase the number of dryer drums, the upper dryer drums 16A and 18A are installed. How to bring them closer to each other is shown in the conventional arrangement in FIG.

Figure 3 shows the upper stage 30 and lower stage of dryer drums 16B, 18B, and 20B. By shortening the vertical distance D1 between the upper dryer drum 16B and the lower drum 32, To shorten the unsupported distance that the web WB moves between the dryer drum 20B and the dryer drum 20B. This figure shows a portion of a so-called “degree approach type” dryer. Figure 3 is also similar to Figure 2. compared to the distance D3 between the upper drums 16A and 18A of the adjacent upper dryer. -Lengthen the distance D2 between the drums 16B and 18B, so that part of the dryer The number of dryer drums that can be placed within a given range of minutes has been reduced. Show ro.

FIG. 4 is a cross-sectional view of a partial dryer device 10C according to the present invention. Figure 4 is Although a “close approach type” arrangement is shown, the upper dryer drums 16C and 18C are adjacent to each other. Minimize the distance between them. This arrangement also allows the web tag to be unsupported and adjacent. move between the upper dryer drum 16C and the lower dryer drum 20G. Minimize distance D5.

In particular, the dryer section 10C shown in FIG. Used to dry WC. Device 10C ear drum 16C, 18C, It has 38. The device 10C is configured to connect each lower dryer of a plurality of lower dryer drums. - has a lower fell (14C) that partially surrounds the drums 20C, 34, 36. multiple The number of lower intermediate rolls 24C928C, 40, 42 are each lower intermediate roll 24C, 28C, 40, 42 are arranged between adjacent dryer drums 20C, 34, 36. It is arranged so that The lower intermediate roll 28C is connected to the adjacent dryer drum 2. 0C and 34, the lower intermediate roll 40 is located between the adjacent dryer drum It is located between 34 and 36. Each lower middle placed every other (jumping) The intermediate roll 40 guides both the web WC and the lower felt 14C. upper fe Each upper dryer drum 16C of the plurality of upper dryer drums , 18C, partially surrounding 38. The plurality of upper intermediate rolls 44.22G and 46 are Each upper intermediate roll 44.22C, 46 is placed between adjacent upper dryer drums. It is designed to be done.

The upper roll 22C is arranged between the dryer drums 16C and 18C, and Intermediate roll 46 is arranged between adjacent upper dryer drums 18C and 38. . Every other upper middle roll, such as roll 22C guides both the web WC and the upper felt 12C, so that the web Open the space between the lower dryer drum 20C and the upper dryer drum 16. transported in the draw 48, thereby minimizing the length D5 of the open draw 48. and the web moves between the upper and lower dryer drums. This prevents the web from fluttering during the process.

In the dryer partial device 10C, the lower felt 14C presses the web to In physical contact with the ear drum 20C, the lower dryer drum 20C, 34, When heating the drum 36, the drum pressed against the lower dryer drum 20C134, 36 Web-C is placed to dry. The lower felt 14C is attached to each adjacent lower felt. Layer drum 20C934, 36 and lower intermediate roll 24C, 28C, 40, 4 2 and extends in a winding shape.

The lower intermediate rolls 40 arranged every other It is disposed adjacent to an upper intermediate roll 46 that is partially encircled. Roll 24C, 2 8G, every other lower intermediate roll of 40.42 is a vacuum roll .

The lower intermediate roll 40 that guides both the web WC and the lower felt 14C is For the upper intermediate roll 46 that is partially surrounded only by the felt 12C, the first They are arranged at a distance D6. Lower Fell) partially surrounded by 14C only Each of the lower intermediate rolls, such as 28C, has a web WC and an upper felt roll. 12G, the second upper intermediate roll 22C is partially surrounded by both They are arranged at a distance D7. The second distance D7 is longer than the first distance D6.

Lower Fell) Partly surrounded by 14G and web WC, such as 40 It is partially surrounded by each lower intermediate roll, the upper felt 12G and the web WC. 50. 51 is formed. A blow box, generally designated 52, ventilates the pocket 51; Boundary air flowing into pocket 51 as indicated by arrow 54 is excluded.

The upper felt 12C presses the web WC and the upper dryer drums 16C, 18 Since the upper dryer drum 16C, 18C, 3 is brought into physical contact with the During heating in step 8, the web WC pressed against the upper dryer drum is dried.

The upper felt 12C is connected to each adjacent upper dryer drum 16C, 18C, 38. It extends in a meandering shape between the upper intermediate rolls 44.22G and 46.

A piece such as 22C that guides both the web-C and the top felt 12C. Each of the upper intermediate rolls arranged every other three is partially removed by only the lower felt stitches 4C. It is arranged adjacent to the lower intermediate roll 28C to be wound. For example, one like 22C Each of the alternating upper rolls is a vacuum roll.

The dryer partial device 10C includes a plurality of doctor blades 56.57°58.59 has. Each blade 56 to 59 of the plurality of blades is attached to each drum 16C, 18C. , 34, 36 so as to contact the non-surrounding surfaces 60, 61, 62, 63 of the upper and Dryer drum 16C corresponding to the lower dryer drum.

Works with 18C, 34, and 36. Blades 56-59 prevent the influence of outside air currents This stabilizes the web WC. Furthermore, the blades 56 to 59 are ropes. While the web is being threaded through the device without using the ).

As shown in FIG. 4, the device 10C is also held together only by the lower felt 14C. 28C, which is disposed adjacent to each lower intermediate roll, such as 28C. 64. This duct 64 has an upper fer) 12C and a lower fer) 14C (arrow 6) to ventilate the adjacent dryer pocket 50 formed between 6) blow air through the lower felt 14C. This device 10C also has ventilation means 68, which are only partially covered by the upper fer H2C. It is located adjacent to each upper intermediate roll, such as 18G, which is wrapped around it. ventilation The means 68 is formed between the upper felt (12C) and the lower felt (14C). To expel air from the dryer pocket 72, the top (as indicated by arrow 70) Air is blown through the felt 12C.

In another embodiment of the invention, the intermediate vacuum roll is replaced by a grooved roll. Ru.

Figure 5 shows the dryer shown in Figure 4, except that distances D8 and D9 are the same. 4 is a side view of a partial dryer device similar to the device shown in FIG. Greater than 6. This arrangement allows the felt to be wrapped around the dryers 20D and 34D. The length will be longer.

In operation of the dryer section device 10C, as the web passes through this device, the web The tail of Web-C (not shown) has a lower fell eye 4C and a lower dryer drum 20G. You will be guided between. The web is attached to the outer surface 26C of the lower dryer drum 20C. It is heated by direct contact and continues toward the upper dryer drum 16C. The web WC passes through the gap with a short open draw D5, and the web WC is connected to the upper felt 12G. It is arranged between the outer surface of the dryer drum 16C and the outer surface of the dryer drum 16C. Combined felt 12C and web WC, the same felt 12C and web WC are put together in the upper dryer. It extends around the upper intermediate roll 22C so as to extend around the yard drum 18C. lengthen Blow water/nx 52 is filled with boundary air accompanying drum 16C in pocket 51. An air curtain is blown in the direction shown by arrow 74 so as not to get inside. upper fe The belt 12C partially surrounds the drum 18C and then around the upper intermediate roll 46. The web WC then moves together with the drum 18C and is guided by the doctor 57. and comes into contact with the outer surface of the lower dryer drum 34. The tail is made of lower felt 14 C and the drum 34, and the felt 14G and the tail of the web are guided between the lower intermediate roller 40 and then extends around the drum 36. The tail of the web is At the pump draw, move towards the upper drum 38 and around it. Stretch between the upper felt 12C and the lower felt 14C. Stretching around the lower intermediate roll 42 of.

When the web is threaded, the rotational speed of the drum is increased to the operating speed and the web is Each dryer drum is placed in close contact with its heating surface over most of its circumference. Lyer drum 20C, 16C.

Stretch around 18C, 34, 36, and 38. In addition, the upper part where the web is adjacent The distance extended by open draw between the dryer drum and the lower dryer drum. The distance D5 is minimized, thereby reducing the spread of sheets between adjacent dryer drums. The possibility of Tatsuki disappears. In addition to this, due to the aforementioned shape, a portion of the dryer The number of upper and lower dryer drums included within a given length of Wrapping both the web and felt around each intermediate roll placed at the It increases due to

The present invention maximizes the heating capacity of each dryer drum within a portion of the dryer. Provides a dryer unit in a compact form that can be expanded to a large extent. Ru. This arrangement also allows for a doctor blade to be placed adjacent to each individual dryer drum. Allow enough room for inclusion. In addition, there is a Since the distance the web travels without support is the shortest, the flapping of the sheet is minimized. significantly reduced.

〜　− Seventy-seven ko = 14ha F　i　injiguchi ☆A) Page Yamatei l Kono-ni S Shozan~ +atk HA 01 Comprehensive translation of the bones (comment 5 No. 11 (4 of 8) 1990 1) 23rd of the month Yoshi, Commissioner of the Patent Office 1) Takeshi Moon 1. Display of patent application PCT/US88102019 2. Name of the invention dryer partial equipment 3. Patent applicant Address: Belloy St. Rolle, Rice Consin 53511, United States Avenue, 1st name: Beloit Corporation Representative: Veneman, Dirk G.I. Nationality: United States of America 1. Agent Address: Toranomon Industrial Building, 2-29 Toranomon-chome, Minato-ku, Tokyo 105 (5 97) 07975, date of submission of amendment July 7, 1989 6. List of attached documents Copy and translation of amendment (specification and scope of claims) - 1 copy - heating surface of drum and The web is part of the dryer because it has a supporting felt placed between it and the web. Alternating physical contact is made only with each heated dryer drum during the passage through the dryer drum. Second With the felt placed between the web and the heated surface of the dryer drum, As the web stretches around the dryer drum, the web is thrown by centrifugal force. A pneumatic wedge at the nip causes the web to tend to separate from the felt. There is a direction.

” West German Patent Publication No. 1.931, filed on January 21, 1971 , No. 922 shows a part of a dryer having an upper row and a lower row of dryers. There is. However, the lower felt 7 is partially stretched by winding the lower dryer. However, it does not include felt that stretches around the upper dryer. Therefore, Although it is the closest prior art to West German Patent Publications 1, 931, and 922, The absence of felt causes various running instability problems.

Therefore, the present invention provides upper and lower dryer drums having a unique configuration. It thus overcomes the aforementioned problems associated with prior art devices. Traditional “uni” Unlike the "Run" system, the present invention has separate upper and lower felts; The upper felt is curved and fits together with the upper dryer drum and the upper intermediate roll. Rotate the sides alternately so that they stretch. Similarly, the bottom felt is attached to each bottom driver. The zero device, which extends alternately between the ear drum and the lower intermediate roll, Every other intermediate roll is made of both felt and web. It is designed to be rolled up. Such an arrangement allows the web to overlap each adjacent top Extend with open draw between the lower dryer drum and the lower dryer drum. Therefore, the web passes through in close contact with the heating surface of each upper and lower dryer drum. do. In addition, due to the aforementioned unique configuration, the adjacent upper dryer drum and lower Minimizes the distance the web travels unsupported to and from the dryer drum .

It is therefore a first object of the present invention to overcome the aforementioned drawbacks of the prior art devices. 1. Multiple lower dryer drums (20C, 34, 36) and multiple upper dryers - drums (16C, 18C, 38), and the plurality of lower dryers. The lower fascia that partially surrounds each lower dryer drum of drums (20C, 34, 36) (14C) and each adjacent lower dryer drum (20C, 34, 36). ) and a plurality of lower intermediate rolls (24C, 28C, 40, 42) arranged between the front and Part of each upper dryer drum (16C, 18C, 38) of the plurality of upper drums The surrounding upper felt (12C) and the plurality of upper intermediate rolls (44, 22G, 4 6) a dryer portion for drying the web (WC) extending therethrough, comprising: (14G) and each upper intermediate roll , each of the upper intermediate rolls arranged every other place has a web (WC) and the upper felt (12c) so that the web (WC) is Adjacent to move in open draw (48) between lower dryer drums The open draw (4 8) Minimize the length D5) of the upper dryer drum and lower dryer drum. The feature is that the web is prevented from flapping while the web is being transferred between the web and the web. a dryer partial unit (IOC) for drying the web (WC) extending through it; .

2. The lower felt is heated by the lower dryer drum when the lower dryer drum is heated. The web is pressed against the lower dryer so that it dries. In physical contact with the drum, the lower felt is attached to each adjacent lower dryer. An unclaimed device extending in a tortuous manner between the ram and the lower intermediate roll. As claimed in claim 11, the web is adapted to guide the tail portion of the web during the finishing process. A partial dryer device.

13, adjacent to each lower intermediate roll partially surrounded by said lower felt only; further comprising a duct disposed between the upper felt and the lower felt. said lower felt to ventilate the adjacent dryer pocket formed between A dryer according to claim 1, which blows air through the dryer. Partial device.

14, adjacent to each upper intermediate roll partially surrounded by said upper felt only; further comprising a ventilation means disposed between the upper felt and the lower felt. For ventilating air from the adjacent dryer section formed between the Claim 1, wherein air is blown through the upper felt. The dryer partial device described in .

15, (Delete) 16. Guiding the web between the lower felt and the lower dryer drum; Draw the top drum so that the web is located between the top dryer drum and the top felt. Run the web around the dryer drum in an open draw. Guide; the combined web and upper felt are passed around the upper intermediate roll and then , move the upper felt around the second upper dryer drum; Guide the unsupported web around the roll; Move from the ear drum to the second lower dryer drum and around it. Let me; The web then comes into close contact with the heating surface of each of the heated dryer drums, and The assembly is designed to minimize the distance the web travels unsupported between ear drums. Combined web and lower international search report international search report

Claims (16)

[Claims] 1. having a plurality of lower dryer drums and a plurality of upper dryer drums; a lower flap that partially surrounds each lower dryer drum of the plurality of lower dryer drums; elt; Only every other lower intermediate roll placed on both the web and the lower felt A plurality of lower dryer drums, each positioned between adjacent lower dryer drums to guide the part intermediate roll; rolls each upper dryer drum of the plurality of upper dryer drums together; Upper felt surrounding part; and only every other upper intermediate roll is connected to the web and said upper felt. guide both the upper and lower dryer drums so that the webs are adjacent to each other. Each has an adjacent upper drying yard for open draw between the placed between the rams, thereby minimizing the open draw length and The web flaps while moving between the lower and lower dryer drums. A plurality of upper intermediate rolls designed to eliminate sticking; A dryer section device that dries the web that passes through it. 2. The lower felt is heated by the lower dryer drum when the lower dryer drum is heated. The web is pressed against the lower dryer so that it dries. In physical contact with the drum, the lower felt is attached to each adjacent lower dryer. Claim 1, which extends in a tortuous manner between the ram and the lower intermediate roll. Dryer partial equipment as described. 3. Every other lower part guiding both the web and said lower felt The intermediate roll includes an upper intermediate roll that is partially surrounded only by said upper felt. Each of the alternate lower intermediate rolls is placed adjacent to the vacuum roll. 2. A dryer subdevice according to claim 1, which is a dryer section. 4. Claim 1, wherein each of the alternately arranged lower rolls is a grooved roll. Dryer partial equipment as described in section. 5. The lower intermediate roll that guides both the web and the lower felt is a first distance relative to the upper intermediate roll partially surrounded by upper felt only; the lower intermediate roller, which is disposed at a Each of the felts has an adjacent top partially surrounded by both the web and said top felt. The part is arranged at a second distance from the intermediate roll, and the second distance is the first distance. Dryer subdevice according to claim 3, which is longer. 6. said every other lower intermediate roller guiding both the web and said lower felt; the upper intermediate roll is partially surrounded by the upper felt only. the lower portion disposed a first distance apart from each other and partially surrounded by the lower felt; Each of the intermediate rolls is partially surrounded by both the web and the top felt. disposed at a second distance with respect to an adjacent upper intermediate roll, said second distance being 4. A dryer subdevice according to claim 3, wherein said first distance is the same as said first distance. 7. each lower intermediate roll partially surrounded by the lower felt and the web; Each upper intermediate roll partially surrounded by an upper felt and a web has a pocket A dryer subdevice according to claim 1, forming a dryer section. 8. Each pocket is ventilated to eliminate boundary air flowing into the pocket. Claim 7 further comprising a blow box disposed within each pocket. Dryer partial equipment as described in section. 9. When the upper dryer drum is heated, it is pressed against the upper dryer drum. The upper felt presses the web to dry the upper dryer so that the web dries. In physical contact with the drum, the top felt is attached to each adjacent top dryer drum. Claim 1, which extends in a meandering manner between the roll and the upper intermediate roll. Dryer partial equipment included. 10. Every other placed top guiding both the web and the top felt The lower intermediate roll is a lower intermediate roll partially surrounded only by the lower felt. and each of said every other upper roll is a vacuum roll. A dryer partial device according to claim 1. 11. further comprising a plurality of doctor blades, each blade of the plurality of blades having a , the top and bottom so that the blades are in contact with the non-encircled surface of each respective drum. According to claim 1, the dryer drum cooperates with a corresponding dryer drum. Dryer partial equipment included. 12. The blades stabilize the web by eliminating the influence of outside airflow and The blade also allows the web to be threaded through the device without the use of lobes. Dryer partial device according to claim 11, adapted to guide the tail of the . 13. adjacent to each lower intermediate roll partially surrounded only by said lower felt; further comprising a duct disposed between the upper felt and the lower felt. said lower felt to ventilate the adjacent dryer pocket formed between The dryer according to claim 1, which blows air through the dryer. Partial device. 14. adjacent to each upper intermediate roll partially surrounded by said upper felt only; further comprising a ventilation means disposed between the upper felt and the lower felt. To vent air from the adjacent dryer pocket formed between the felt Claim 1, wherein air is blown through the upper felt. The dryer partial device described in . 15. having a plurality of lower dryer drums and a plurality of upper dryer drums; a lower flap that partially surrounds each lower dryer drum of the plurality of lower dryer drums; elt; Each lower intermediate roll has only every other lower intermediate roll placed in front of the web. Place between adjacent lower dryer drums to guide both lower felts. multiple lower intermediate rolls; an upper flap that partially surrounds each upper dryer drum of the plurality of upper dryer drums; elt; Every other upper intermediate roll carries both the web and said upper felt. By guiding the web into the adjacent upper dryer drum and lower dryer Adjacent upper dryer drum to be fed in open draw between drums placed between the webs, thereby minimizing the length of said open draw. of the web while moving between the upper and lower dryer drums. Eliminate flapping and direct contact between the web and the respective heated surfaces of the dryer drum Multiple upper middle rolls to maximize; A dryer section device for drying a web consisting of and extending through. 16. guiding the web between the lower felt and the lower dryer drum; Draw the top drum so that the web is located between the top dryer drum and the top felt. Run the web around the dryer drum in an open draw. Guide; the combined web and upper felt are passed around the upper intermediate roll and then , move the upper felt around the second upper dryer drum; Guide around the roll; the web connects the second lower dryer drum and the lower felt. The unsupported web is moved from the second upper dryer drum so that the unsupported web is disposed between 2 Move around the lower dryer drum; The web then comes into close contact with the heating surface of each of the heated dryer drums, and The assembly is designed to minimize the distance the web travels unsupported between ear drums. The combined web and the lower felt pass together around the second lower intermediate roll and then pass through the third lower intermediate roll. Move towards the dryer drum; Method of drying a web extending through a dryer section device of a papermaking machine consisting of stages .