JPS59655A - Method and device for indicating length of fiber - 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 For example, when grinding roaches and the like to prepare a roofing felt composition, it is necessary to determine when the raw material has reached the desired state.

Fibers that are too long are difficult to process and result in inferior products. Fibers that are too short drain slowly and impede efficient production. Currently, the only way to determine quality is to manually inspect a handful of raw materials. Such methods are not only time consuming, but also highly inaccurate depending on the skill and experience of the personnel involved. As a result, product quality is poor, productivity is low, and working costs are high.

In recent years, batch digesters have been replaced by continuous digesters, in which wood chips and chemicals are continuously introduced into a complex system of multiple containers, piping, etc. , and is retrieved from there. A problem encountered in many continuous four-leaf mills is that several types of wood are used and the resulting nine-leaf must be separated according to the type of wood. That is, it is necessary to separate the pulp made from softwood from the pulp made from saws, etc.

Such a problem is that all pulps are virtually indistinguishable when the pulp leaves the pipeline. However, there is one factor that quantitatively confirms virtually all loops, namely the /4 loop length. When No4rupu passes Noma Eveline, No4
By continuously monitoring the fiber length of the runde, changes from one type to another are immediately obvious, and the possibility of giving the customer an unsuitable runde is positively eliminated. be excluded.

It goes without saying, therefore, that such a device would be extremely useful to automatically monitor the fiber length of beaten stock or unbeaten paper pulp while in slurry at working consistency and while in the papermaking equipment. stomach.

The main object of the invention is to provide a method and apparatus which generates a signal to inform the operator when the interface of the arm is passed or when the stock is being beaten to the correct fiber length and quality. will be provided. Such a signal can be used to automatically control the refining action of the IJ 7 aina to maximize uniformity.

U.S. Pat. No. 1.58'0.166, issued to Mr. Reid on April 13, 1926, describes nine screens with narrow slots of elongated width and completely separated from the stock pipeline apparatus. Research-type equipment has been proposed, consisting of a tank with a filtration system and a vacuum device for drawing the stock through the screen. Since the width of such slots is on the order of one-hundredth of an inch, a dilute slurry is used and the stock is treated as loose fibers rather than as a fiber aggregate. In Mr. Reid's device, I
Instant readout in on-line (on-11na) operation is not possible. This is because the fibers that do not pass through the screen must be counted or weighed.

Pearson on February 28, 1961
In US Pat. No. 2,973,000, a sharp-edged orifice plate is used to determine the concentration of diluted stock in a research type device. In this case, all fibers pass through the orifice regardless of length.

U.S. Patent No. 3.846.231 granted to Mr. Grosb et al. on November 5, 1974,
Two U.S. patents by the inventor for filtered water production testers cited for this U.S. patent: U.S. Pat. Chapter 5.18
As disclosed in US Pat. No. 6,215, the stock is removed across a perforated partition plate to measure the charcoal. These US patents do not equally claim or teach fiber length measurement or monitoring.

Strictly speaking, the prior art related to the measurement of fiber length is 1.
U.S. Patent No. 3.873.41, registered March 25, 975
No. 6, but that device requires substantial dilution of the stock rather than the working concentration in the papermaking load. The devices of the above technology operate on a continuous fluid flow principle rather than a sampling sequence and utilize a vertically oriented vibrating separation screen.

None of the devices of the above patents are on the market, and no instantaneous and automatic fiber length readout has been developed other than that disclosed herein.

There are no other references in the prior art that disclose devices for directly monitoring fiber length in manufacturing equipment.

The present invention provides an apparatus and method for monitoring fiber length in a beaten stock or unbeaten paper stock, in which the readout is instantaneous; An automatic control device is provided which is operated periodically while the fiber slurry is in the papermaking machine at working consistency, similar to that provided in the standpipe of the above-mentioned patent for the filtrate tester. The filtration KM equipment is the ``Trainatsuk'' (Dralna) manufactured by Luton Emeron Company in Massachusetts.
c) is well known in the market.

In one embodiment of the filtration tester, an upright standpipe is provided in the line with its lower end directly connected to the stock line or to the stock line, and the upper part forms a measuring chamber by a transverse screen within the filtration tester. do. The time control device repeats the intake into the measurement chamber by discharging the air in the measurement chamber to create a flow through the screen, a pair of electrodes detects the liquid level achieved by the filtrate, and the air pressure drains the filtrate through the screen, thus returning the fibers to the equipment.

If it is desired to equilibrate the pressure of the stock, it is better to expose the measurement chamber of the filtration tester to atmospheric pressure rather than to negative pressure.
Also, Patent No. 2.734 registered on February 14, 1956
, 378, a certain level headbox may be used between the stock line and the tester.

A salient feature of the present invention is that instead of using a mesh screen or slotted plate, the fiber length indicator disclosed herein extends across the measurement chamber and has at least one orifice or hole. The orifices or holes are of a predetermined area or shape and have a predetermined cross section substantially equal to the relative length of the fibers to be detected for different AIs or desired relative lengths. It is a dimension or diameter.

When the change in the rice plants in the rice breeding line is to be detected, the lower end of the upright container can be connected directly to the device without having a pipe or means for connecting the tester to the manual tester. let The fiber length indicator or detector automatically and periodically intakes, measures and discharges 〈υ back and electric blow in the measuring chamber! or other level sensing device repeatedly generates a "correct" signal indicating that the fiber length is flowing for a predetermined set intake time. When it encounters an interface with another type of fiber, the fibers will be of different lengths, so the ``incorrect length'' will be read.

A mesh screen or perforated plate, similar to a screen such as that used in a water production tester, does not act as a partition wall across the measuring chamber of the fiber length indicator of the present invention. The reason for this is that the stock to be measured has a high concentration and cannot be filtered by conventional methods. Although a single orifice is sometimes preferred, it has been found that multiple (eg four) orifices of the same or different diameters are usually preferred. The range of orifice diameters depends on the length of the fiber to be measured, from 1 millimeter for very fine synthetic fibers to 2 millimeters for relatively unbeaten, ragged fibers.
It is up to 0 mm.

Since a single fiber processing mill produces a large number of different grades, the fiber length indicator of the present invention has a number of interchangeable plates, each plate having a different length to achieve "coarse adjustment." It has at least one orifice of any shape or area, and the micro[E] is achieved by a constant pressure difference across the orifice. Over a reasonable range, the same orifice can distinguish between different fiber lengths depending on the driving force.
The preferred actuation occurs between 0.5 and 1.5 p, s, l.

The invention will now be described with reference to the accompanying drawings.

A stock supply ff 120 is shown schematically in FIG.
rdan) Also FiI Claflin (C1afll
n)'-type raw material refiner 26. The refiner 26 discharges into a conduit 27, having a conduit 27Fi and a fiber length indicator 28 of the present invention installed in the conduit, the indicator having a control device as shown in FIG. 7 or 11. . Conduit 27 contains pulp 29 and discharges into beater 21 or elsewhere as desired.

As best shown in FIG.
includes an upright stock container 31, similar to the Dralna #filtration tester described above, which is connected directly to the stock or pulp conduit 27. conduit 27
forms part of the stock device 20, and at the operating concentration the stock,
Or because it contains Nof Ruzo 32, No Mother Rude has a relatively high concentration, and the test at the test site or Paino J? It was not diluted for testing.

The stock container 311fi is divided in the middle of its height by an orifice plate 33 to form an upper part 34 and a lower part 35, which are measuring chambers.

The lower end 36 of the lower portion 35 is connected to a stock or medium loop conduit 27 for receiving the stock or /4'lude 32 from the stock conduit 27 in working consistency.

The orifice plate 33H is of a non-porous material, such as metal, rather than a mesh perforated screen, and has at least one orifice 37 in the plate formed by a rim 38. The orifice 37 is preferably cylindrical and has a predetermined diameter approximately equal to the relative length of the fiber 39 to be monitored within the measurement chamber 34 . The orifice 37 may be of other shapes, configurations or cross-sectional areas, such as triangular, provided that the cross-sectional dimensions are of a predetermined width equal to a predetermined relative length of the fibers to be measured; Cylindrical orifices are known to be most preferred.It should be understood that virtually all NI fiber slurries range in fiber length from several orders of magnitude to less than one order of magnitude with a distribution similar to the probability curve. Yes, short fibers pass through the orifice,
Long lines m accumulate without passing through this, and eventually no longer pass through it. The volume of stock passing through the orifice when sniffed is a measure of the relative length of the fibers, other things being equal.

The slurry is not dehydrated as a result of passing through the orifice.

During the operation of a fiber production machine, the orifice plate, each with a different size orifice, is used to ensure that each orifice of a particular size feeds the fibers at a predetermined intake time to meet the specifications or production conditions of the production machine. The *m length indicator of the present invention can be substituted until the desired relative length is indicated. The same orifice plate and orifices then repeatedly monitor production and indicate changes in quality manifested by changes in the relative lengths of the fibers in the slurry.

The tubular cylindrical orifices 37 of each orifice plate 33 have a diameter ranging from approximately 201111 for rag fibers suitable for roofing felt hess to no. have a diameter within the range.

In FIG. 5, the illustrated diameter is approximately 1 taa;
This is a highly beaten flux sno-e-orso suitable for cigarette paper or high quality synthetic fibers.

In FIG. 3, an orifice 41 similar to the orifice plate 33 is shown, and the rim 42 forms a roughly cylindrical orifice 43 having a cross-sectional dimension or diameter of about 2011111. It is used to measure the fibers of relatively unbeaten pulp suitable for roofing felt paste.

The orifice plate 44 in FIG.
5.46.47.48.49 in that a plurality of identical orifices are formed. These multiple orifices are circular with relatively uniform cross-sectional dimensions;
It can be of triangular, square or other shape. Multiple orifices with similar or different dimensions can also be used 7 to average the fiber length measurements.

Orifice plate 51U shown in FIG. 1llr&
, an orifice 52 whose shape and cross-sectional dimensions can be changed, and a device 53 for changing these. The orifice 52#'i can also be formed as a shutter of a camera, but is preferably illustrated and preferably a pair of slides y, arranged oppositely and provided with V-shaped cutouts 56, 57. - formed by f
-) may be actuated from outside the vessel by means of a suitable bushing rod 58% 59 during operation.

The orifices 37, 43, 45 and 52 are of the standard type, preferably thin plates formed with sharp right-angled edges upstream and downstream. They are designed so as not to create jets and are more appropriately called holes or openings.

Preferably, the baffle or targout plate 61 is 37
are spaced above each orifice to widen and dampen the jet of stock into the measuring chamber 34. The target plate 61 is preferably the lower end of a cylindrical hollow bar supported from above in order to avoid interference with the incoming material.

A set of orifice plates 33.41.44,51, each with orifices of different diameters, possibly
A total of ten to twenty orifice plates may be provided for each fiber length indicator 28 in sets. The orifice plates are each seated in a plate recess 63 at the dividing plane 64, so that the upper part 34 is free - hinged at the rear to a hinge 65 so that the orifice plates in the set can be exchanged; ♂
It can be fixed again by the seat 66.

Rather than being separable at intermediate height 64, the upper portion is preferably a transparent tube with an annular shape seated on a socket 70.

A slurry level detection device 67 is provided in the upper part constituting the measuring chamber 34 and is formed by at least one, preferably both a lower electrical probe 68 and an upper electrical globe 69. Other suitable slurry level detection devices may be used.

A differential pressure control device w71 (FIG. 11) is included in the device 20 to ensure accuracy of control conditions. Differential pressure n 703,
07 K1m2 (1 psl) is necessary, and this differential pressure may reduce the pressure in the measurement chamber 34 from the line pressure or stock pressure in the stock or pulp line 27, but r- Schiff 1 prevents arithmetic errors and makes the system simpler and easier to handle.

A check pulp 72 is integrated with each orifice plate to prevent passage upstream through the plate except at the orifice, but to facilitate passage downstream through the plate during the discharge cycle to the stock line. do.

A discharge pulp 73 is provided to facilitate discharge from the measuring chamber through the auxiliary opening during the discharge cycle. The water pulp 74 supplies dilution water from the feed channel -w75 to wash the parts and return all fibers to the nof brine 27.

The fiber length indicator 28 of the present invention, as shown in FIG. Yes, this line pressure does not affect the differential pressure.

The liquid 32 is directed into the upright open top tube 76 located in the center of the upright open top tube 77 and is directed into the upright open top tube 76 .
and flows into the discharge lower 9. Thus, the hydraulic head or pressure remains unchanged since the liquid is led from the bottom 81 of the tube 76 by the conduit 82 into the lower part 35 of the container 31.

The automatic controller 83 of the present invention has an air inlet tube 84 having one end 85 within the measurement chamber 34 and communicating with a source of air pressure 86, such as mill air. The automatic control device 83 also has an exhaust pipe 87 having one end 88 within the measurement chamber 34 and communicating with the atmosphere or a gazebo or negative air pressure source 89 .

The automatic tying device 91 has two prongs or electrodes 68.
．． 69, and the follow-up device is indicated at 92.

As shown diagrammatically, the automatic control device has a cycle timer 93 of known construction which is connected by suitable electrical circuits to conductors 94,958 to the dump pulp 73 and conductors 96,97 to the water-diluted pulp 74. , conductors 98, 99 to electrodes 68, 69, and conductors 101, 102 to the electrical supply group 103, air exhaust pulp 104, which are actuated by suitable solenoids as programmed. .

The automatic control device 83 is disclosed in U.S. Pat. No. 3,186,215 (1).
June 1, 965) and No. 3.538,749 (June 1, 965)
It is similar to the control device described in No. 10, Nov. 1970) and is incorporated into the filtrate test equipment disclosed in these patents to automatically repeat measurements and discharges.

Thus, a suitable grate 33 having at least one orifice having a cross-sectional dimension and cross-sectional area capable of passing fibers of substantially the correct desired relative length is mounted in the seat or recess 63, and the indicator 28 is is closed and cycle timer 93 is activated. Cycle timer is in measurement room 3
By repeating the intake, measuring and discharging steps 4 and opening the air discharge pulp 104 to negative pressure or the atmosphere, the fibers in the paper stock are removed from each orifice. , measurement room 3 from step 37
It can be passed to 4. Since the predetermined intake time of the cycle is established by a cycle timer, if the stock that reaches the lower nozzle 8 does not pass through the orifice before the set intake time has elapsed, "draining" or evacuation is initiated;
A read signal "too long" is displayed at 92. This is the 8th
The situation is shown in the figure.

If the stock reaches the upper probe 69 before the timer's set intake time has elapsed, "discharge" begins, and the readout 92
The signal "too short" is displayed on the screen (Figure 10).

If the stock reaches the lower probe 68 but not the upper probe 69 before the timer expires at the set intake time, "discharge" is initiated and the signal "Just right" or its equivalent is displayed on the header 92. The pressure difference between the stock line pressure and the measurement chamber pressure is determined by the differential pressure gauge 7.
1 (FIG. 11) and controlled by automatic controller 83 to approximately 1 psi compared to approximately 7 psl in the filtrate tester.

A check pulp 72 in each orifice plate allows one-way return of the stock from the measuring chamber 34 to the stock line during the discharge or pumping cycle, and a dump pulp 73 also allows the stock to be returned to the stock line from the measuring chamber 34 during the discharge or pumping cycle.
4. Enables quick cleaning. The cycle timer 93 is
During the discharge cycle, wash water is programmed to be fed through the pulp 74 to remove fibers or fibrous mats from the orifice plate and orifices.

As mentioned above, in the structure of FIG. 7, due to the constant hydraulic head in the open inner tube or container 76, changes in stock line pressure will not affect measurements in the container 31 shown in FIG. Not affected.

Air Side Pressure It is understood that water pressure is greater than line pressure. The intake time is approximately 10 seconds, the discharge time is approximately 1D seconds, and the fiber length indicator of the present invention can be repeated at desired intervals to accurately determine the passage of 3 feet of stock or lubricant. Na M! The length is read out and an indicator is used to notify the operator that nine different types of Noyalde are passing through.

As shown diagrammatically in FIG.
The fiber length in the stock line 27 is measured periodically with the fiber length indicator 28 of the present invention, and the freeness in the stock line 27 is measured as described in the above-mentioned U.S. Pat. 186, 21
This is achieved by periodically measuring with a No. 5 filtrate tester 105.

Fishery tester 105 and fiber length indicator 2 shown by dotted lines
8 are both connected to a control device as shown in Fig. 7,
The controller includes a controller 83 and a circuit 106 to the refiner drive 107 so that the refining operation is automatically controlled to compensate for changes in fiber length or freeness. be done.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a fiber length indicator of the present invention installed in a closed stock line including a beater and a stock refiner. FIG. 2 is shown partially cut away for clarity, M
FIG. 3 is an enlarged side view of the fiber length indicator. 1K3, 4, 5 and 6 are partial plan views of measurement chambers with different types of ice plates. FIG. 7 is a schematic diagram of the installation of a fiber length indicator in an open stock system. Figures 8, 9 and 10 are enlarged schematic cross-sectional views of the measurement chamber showing overly long, just right and overly short fibers, respectively. Factor 11 is a schematic diagram illustrating a pneumatic/hydraulic control system for circulating the fiber length indicator of the present invention in a typical stock system. 20...paper stock system, 21...beater, 22...
・Valve, 23...Paper stock conduit, 24...Imp, 25.
...4 tubes, 26...stock refiner. [Month, 1980] Kazuo Wakasugi, Director-General of the Agency for Special Aged Health, 1. Presentation of the case: Patent Application No. 49666 of 1982. 2. Title of the invention: Fiber length indicating method and device. 3
, Relationship to the amended party case Applicant 4, Attorney included 5, Date of supplementary IF order Sponsored claims + 11 The fibers in the stock or pulp while in the papermaking equipment and during the working concentration In a length cyclic testing apparatus, a stock chamber having one end connected to a source of said stock at working concentration, a lower blade part and a one end part, and a stock level in the ten recording chamber. a liquid level detection device in the upper part of the chamber for detecting the liquid level; an orifice plate provided across the at least one orifice circumference ν) of a predetermined cross-sectional dimension approximately equal to the desired relative length of the fibers in said stock, except for the edges of said plate; is perforated and has an automatic control device operably connected to said container for cyclically repeating the intake, measurement and discharge in said chamber, said device comprising: A testing device characterized by comprising an automatic timing device connected to the above-mentioned upper and lower detection devices, and connected to a readout device for accumulating paper stock at the end of a preset time. (2) The orifice of the above orifice spray i is a roofing fiber, which has been beaten to 101 degrees and passed through tobacco tissue paper for about 5 to 20'ms for fibers. 2. A test device as claimed in claim 1, characterized in that it has a cross-sectional dimension in the range of about 1 to 2 fins for pulp. (3) The orifice spray I~ is characterized in that it contains a number of orifices identical to the orifices mentioned above in order to equalize the passage of the delicate through the orifice plate in the upper part of the chamber. ,! 1. The test device according to claim 1. (4) The orifice plate F includes a mechanism for adjusting the cross-sectional dimension of the orifice 1.
a device for operating the mechanism from outside the Hf;
Enclose R. The test device according to claim 1, characterized by: τ. +51 The device 11A of claim 1L14, wherein each of the L orifices is cylindrical in shape. (6) The automatic control device includes a device for creating a predetermined pressure difference between the pressure of the stock supplied to the F end of the container and the pressure in the T section of the stock chamber. And the size of the orifice is this test #11! In addition to making adjustments to the equipment, 1. The testing device according to claim 1, characterized in that the differential pressure is precisely adjusted for the testing device. (7) This device spreads the stock laterally; And in order to avoid geyser action in the upper part of the chamber, the paper should be passed through the orifice marked I.
Panfur or target 93 provided in the above container!
The test device according to claim 1, characterized in that the test device includes an element. (81 This device has approximately 35 to 105
g/cdl (approximately () tatami) to 1.5 Psi>
2. A test device as claimed in claim 1, characterized in that it includes a device for maintaining a differential pressure of . (9) Work? In a device for periodically testing the fiber strength of a paper stock or pulp in a papermaking machine during degrees, the lower end is connected to said papermaking machine for receiving said stock or pulp at working consistency. an upright vessel with an orifice 7 having an A-rifice plate mounted across the interior of the vessel in the middle of the length of the vessel to form a measuring chamber; 1 is without holes 7 except for at least one orifice passing through the orifice plate and having a rim extending around it, said orifice being of a predetermined shape and area, and said paper making apparatus 4Y a liquid level detection device is provided in said measuring chamber, having a predetermined cross-sectional width substantially equal to the desired relative length of the stock or valve in said measuring chamber, for detecting the liquid level reached in said measuring chamber; Measurement room C7 two works! I
! an automatic control for controlling the cycle timing, which is connected to the chamber to periodically repeat the intake, measurement and discharge in said chamber to establish a predetermined set intake time for a given fiber loading; 12. An apparatus, wherein the timing device and the control device include a follow-up device that signals fiber length detected at the end of each intake cycle. 10.Ol as claimed in claim 9, characterized in that each said orifice is substantially circular in shape, the diameter of which is equal to the relative length of the stock or the fineness desired for the bulb. Device. OO Each said orifice is circular, ranging from 1- for very fine synthetic fibers to about 2 On+ for relatively coarse, ragged fibers.
10. The device according to claim 9, wherein the device has a diameter of 1H in the range of . 0→ The automatic control device is 35.15 g/al
l/'J♀105, 45 g/cA (0,5psi
10. The apparatus of claim 9, further comprising means for establishing a pressure differential across each orifice within a range of 1.5 psi to 1.5 psi. 0→Wi+ container is operably connected to the measuring chamber and has a dump pulp for discharging the contents of the measuring chamber, and the automatic controller is configured to direct the contents of the chamber to the orifice during discharge. 10. Apparatus according to claim 9, characterized in that it includes means for actuating the dump valve during the evacuation cycle so that the dump valve does not need to be discharged through. 01) said container has a cleaning conduit attached to direct a cleaning stream of liquid to said orifice plate to remove fibers collected in said orifice from said orifice; and automatically cleaning each said orifice during evacuation. 10. Device according to claim 9, characterized in that it comprises a liquid supply device forming part of the automatic control device for the purpose of controlling the automatic control device. 09 The orifice plate is one of a plurality of orifice plates each having orifices of different predetermined areas and cross-sectional widths, and the container C uses the one orifice plate in place of another orifice plate. 10. Apparatus according to claim 9, characterized in that it is separable in the middle of the A-shape of the container so that it can be separated. Patent characterized in that the timing device, control device ftf I&, and reading device are scanably connected to provide a signal in which the fiber length is proportional to the desired relative uh fiber length C before each ejection cycle. The apparatus according to claim 9. 0 Force The length of fibers of the beaten or unbeaten paper fines slurry is reduced to L7. i7t' is the method of inspection by means of a standpipe with an orifice plate connected across the interior thereof, of a given configuration and of a cross-sectional dimension approximately equal to the relative length of am desired in said apparatus. Both plates with one orifice are Ai+
As shown in Play I, connect the standpipe L7 into the apparatus for the increment phase, measurement and discharge cycles, the slurry passes through the 1) oriice into the measuring chamber.
(1) determine the measurement intake time for measurements in the chamber, and determine whether the slurry passes through the orifice and enters the measurement chamber at a predetermined volume or at a predetermined A, at the end of each intake cycle. The method is characterized in that the fiber length of the beaten stock or unbeaten paper pulp is detected by comparing it with the set intake time. in between, a method for automatic monthly pre-consolidation by means of a container having an orifice plate connected in the device, a measuring chamber and a liquid level detection device in the chamber, the method comprising: being introduced in the measuring chamber; Measuring and discharging are periodically and automatically repeated so that the fibers in the paper stock or pulp pass through the orifice and enter the chamber and come into contact with the liquid level detection device, 1);
A method comprising: responsive to a dispensing surface sensing device to indicate whether the correct length of fiber was detected thereby at the end of the intake cycle. ) Apparatus for controlling the quality of the stock discharged from a stock refiner, the stock having a pair of members accommodating a stock of a working consistency and movable in a rotatable manner with respect to one another. a stock supply device including a refiner; a device for driving one of the members described in iii with respect to the other; a device for varying the ripping action of said refiner; a substantially cylindrical opening having a cross-sectional dimension or diameter approximately equal to its relative length; a device for detecting the transit time of the stock;
# A length indicating device, the detecting device and the measuring device,
operatively connected to a device for varying the refining action of said refiner to compensate for variations in the thinness of the fibers fed therein with respect to the length of fiber desired to be fed thereto; A device characterized in that it consists of a device;
Ro ni) iij Ht! Equipment W11 includes a drainage formation tester,
The drainage formation tester and the fiber length indicating device are connected to the stock supply device WI'! and operatively connected to said apparatus for changing the refining action of said apparatus, said apparatus for controlling the drainage of the beaten product and the length of the fibers. 20. The device according to claim 19, characterized in that it controls both. Director General of the Japan Patent Office (Monday, Showa) 1. Indication of the case Showa JG Patent Application No. 77-9 No. 2 No. 2, Title of the invention Fiber length indicating method and device 3. Relationship with the amended person's case Applicant Name Holt/-Emerson Incoholated 4,
Agent 5, date of amendment order Showa, 5th, 2nd month, 2nd day, 5th.
Target of correction: All drawings

Claims (1)

[Claims] +11. An apparatus for cyclically testing the length of fibers in paper stock, comprising: a stock chamber having a lower end connected to a source of said stock at working concentration, a lower portion and an upper portion; an upright stock container having upper and lower sensing devices in an upper part of the chamber for detecting the time of arrival of a stock level in the chamber; and dividing the chamber into an upper part and a lower part. an orifice plate disposed across the chamber; the plate having a predetermined cross-sectional dimension approximately equal to the desired relative length of the fibers in the stock; an automatic control #et1 operably connected to the vessel for cyclically repeating intake, measurement and discharge in the chamber;
and an automatic timing device connected to the above-mentioned upper and lower detection devices and connected to a continuous output device for reading out the accumulated value of paper stock during a preset time. (2) The orifice height of the above-mentioned orifice plate ranges from about 5 to 20 meters for rag fibers passed through a felt base for roofing to about 2 meters for highly beaten 7-lacs snorkel fibers suitable for tobacco tissue paper. (3) The orifice plate is configured to have a cross-sectional dimension in the range of 2. A test device as claimed in claim 1, characterized in that said rounding includes a number of orifices identical to said orifices. (4) The orifice plate includes a mechanism for adjusting the cross-sectional dimension of the orifice, and a device for operating the mechanism from outside the test apparatus. The test device according to paragraph 1. (5) The test device according to claim 1, wherein each of the orifices is approximately cylindrical in shape. (6) The automatic control device includes a device for creating a predetermined pressure difference between the pressure of the stock fed to the lower end of the container and the pressure in the upper part of the stock chamber, and In addition to making rough adjustments to this test equipment,
2. The test device according to claim 1, wherein the differential pressure is used to precisely adjust the test device. (7) The device includes a baffle or groove provided in the vessel in the passage of the stock through the orifice in order to spread the stock laterally and avoid geyser action in the upper part of the chamber. A test device according to claim 1, characterized in that it includes the following elements: (8) This device has approximately 35 to 1
05? /G! Test device according to claim m1, characterized in that it includes a device for maintaining a differential pressure of n2 (approximately 0.5 to 1.5 oi1). (9) In a device for periodically testing the fiber length of stock or /IP loop in a papermaking machine, a lower end connected to said backing device for receiving said stock or /matrix in working consistency; an orifice plate mounted across the interior of the vessel at an intermediate height of the vessel to form a measurement chamber; and the rim extends circumferentially.
without holes except for one orifice, said orifice being of a predetermined shape and area and having a predetermined cross-section substantially equal to the relative length desired for the stock or slug in said papermaking apparatus. A liquid level sensing device is provided in the measuring chamber for detecting the level of liquid that has reached the measuring chamber, the device being operably connected to the measuring chamber and configured to cycle intake, measurement and discharge in the chamber. an automatic timing device responsive to said liquid level sensing device and establishing a predetermined set intake time for a given fiber length during an intake cycle of said controller; wherein said timing device and said control device include a readout device for signaling the fiber length detected during each said cycle. OI according to claim 9, characterized in that each said orifice is substantially circular in shape, the diameter of which is equal to the relative length of the fibers desired in said stock or /l loop. The device described. aυ Each said oriice is circular, ranging from 11 DI for very fine synthetic fibers to about 2 DI for relatively coarse hollof fibers.
10. A device according to claim 9, characterized in that it is of a diameter in the range up to 0.01111. 0 hot water The automatic control device is 55, 15 f/lx2
~105.45j'/cIn2 (0.5 psl
10. Apparatus according to claim 9, characterized in that it has provision f for establishing a pressure difference across each oriice in the range 1.5 psl to 1.5 psl). The container has a dump pulp operably connected to the measurement chamber and discharges the contents of the measurement chamber, and the automatic controller directs the contents of the chamber through the oriice during discharge. 10. Apparatus according to claim 9, characterized in that it comprises a device for actuating the dump pulp during the discharge cycle so that it does not need to be discharged. No. 0 said vessel has a cleaning conduit attached to direct a cleaning stream of liquid to said orifice plate to remove from said orifice any fibers collected in said orifice, and for automatically cleaning each said orifice during evacuation. A device according to claim 1, characterized in that it comprises: a liquid supply device forming part of the automatic control device for the purpose of controlling the automatic control device; (Is) the orifice plate is one of a set of orifice plates each having orifices of different predetermined areas and cross-sectional widths; Claim 9, characterized in that the container is separable mid-height so that it can be used for
The device described in JJI. 0I19 The timing device, the control device and! il
i! 10. Apparatus according to claim 9, characterized in that the mounting M is operably connected to provide a signal in which the fiber length is proportional to the desired relative fiber length before each ejection cycle. a'I) Determining the length of the fibers of the beaten or unbeaten paper fiber slurry by means of an orifice plate coupled into and extending across the interior of the apparatus while in the paper loading warehouse and during working concentration. 2. A method of testing by means of a standpipe, wherein a plate having at least one orifice of a predetermined configuration and of a cross-sectional dimension approximately equal to the relative length of the fibers desired in said apparatus is selected as said plate. introducing and connecting the standpipe into the device for a measurement and discharge cycle, allowing slurry to pass through the orifice into a measurement chamber and establishing a set intake time for measurements in the chamber; A method characterized in that it is determined during each intake cycle whether the slurry passes through the orifice in a predetermined volume or to a predetermined height and enters the measurement chamber by comparison with the set intake time. α碍 Measurement of the length of the fibers of beaten stock or unbeaten paper stock during working concentration and while in the papermaking apparatus, a container having an orifice plate connected in said apparatus. by a chamber and a liquid level detection device in the chamber,
A method of automatic and periodic monitoring, in which intake, measurement and discharge are periodically and automatically repeated in the measuring chamber, and the fibers in the paper stock or pulp pass through the oriswiss. the liquid entering the chamber and contacting the liquid level sensing device and responsive to the liquid level sensing device to indicate whether the correct length of fiber was thereby detected at the end of the intake cycle. How to characterize it. +19 A device for controlling the quality of the stock discharged from a stock refiner, comprising a stock refiner having a pair of members that contain the entire stock of normal working consistency and are rotatably movable relative to each other. a stock supply device, a device for driving one of said members with respect to the other member, a device for varying the refining action of said refiner, and a device for approximately the relative length of bags of fiber desired to be beaten; a plate having substantially cylindrical openings of equal cross-sectional dimensions or diameters, and a device for detecting the passage time of stock through said openings in comparison with a predetermined time interval; a fiber length indicating device coupled to a stock supply device for periodically measuring the relative length of the fibers of the stock passing through the device; a device operatively connected to the device for varying the action and compensating for the convenience of the length of the fibers fed therein with respect to the length of the fibers desired to be fed thereto; Characteristic Apparatus 0 (1) The apparatus includes a filtration tester, and the filtration tester and the fiber length indicating device are connected to the stock supply device, and the refiner paste 7 ironing action is performed. operatively coupled together to said device for changing;
20. Apparatus according to claim 19, characterized in that it controls both the hydrosphere and fiber length of the beaten product of the apparatus.