US3848814A - Pulp grinder - Google Patents
Pulp grinder Download PDFInfo
- Publication number
- US3848814A US3848814A US00283230A US28323072A US3848814A US 3848814 A US3848814 A US 3848814A US 00283230 A US00283230 A US 00283230A US 28323072 A US28323072 A US 28323072A US 3848814 A US3848814 A US 3848814A
- Authority
- US
- United States
- Prior art keywords
- pin
- pulp
- grinder
- blade disk
- rotating blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920002678 cellulose Polymers 0.000 claims abstract description 4
- 239000001913 cellulose Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 description 21
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/14—Adjusting, applying pressure to, or controlling distance between, discs
Definitions
- the quality of the ground pulp is decisively influenced not only by the width of the grinding gap but also by the accuracy with which the grinding surfaces are parallel.
- certain parts of the body structure of the grinder warm up, causing thermal expansion and as the result of this, an error in the parallel alignment.
- the quality of the pulp deteriorates.
- Even an error as small as 0.05 mm in the parallel alignment of the grinding surfaces has to be corrected.
- the pulp grinder is stopped after it has reached operating temperature and an impairment of the pulp quality due to thermal stresses has been noticed. Subsequently, the grinding gaps have been adjusted with the aid of one or several fixing pins to be parallel once again.
- the aim of the present invention is to eliminate this drawback and to provide a pulp grinder wherein the adjustment can be made during operation of the grinder.
- the invention is characterized in that at least one fixing pin is heatable, and thereby adjustable in its length, for instance by the aid of electric current, of a temperature-controlled medium or of vibration. These modes of producing and transferring heat may all be applied for changing the length of one fixing pin, or regulating pin.
- At least one fixing pin or regulating pin is heatable by the aid of an electrical resistor placed in a cavity within it.
- an electrical resistor placed in a cavity within it.
- the regulating pin itself is an electrical resistor. It is also possible to place within the pin an induction coil, by means of which the temperature may be raised.
- Heat may be introduced along with a fluid.
- ducts are provided in the regulating pin in which a circulation of temperature-controlled liquid or gas is arranged. In this case it is advantageous that it is also possible to cool the pin.
- Heat transfer may also be by conduction with the aid of a solid, thermally well conductive substance.
- the regulating pin may be heated by the aid of vibration, such as ultrasound.
- FIG. 1 represents, schematically, a disk grinder with one blade gap, in section carried along the line I--I in FIG. 2,
- FIG. 2 shows the section along the line llll in FIG.
- FIG. 3 is a more detailed longitudinal section of the pulp grinder, along the line lII-IIl in FIG. 4,
- FIG. 4 shows the pulp grinder of FIG. 3, sectioned along the line IVIV in FIG. 3, and
- FIG. 5 is the regulating pin in the upper part of FIG. 3, on a larger scale and longitudinally sectioned.
- the angle a illustrates the angle between the non-rotating blade disk 1 and the rotating blade disk 2, which is the deviation from parallel alignment due to bending of the grinder body 13.
- the bending of the body 13, again, is caused by the fact that the pulp grinder reaches, after it has been started, its operating temperature.
- this error deviation may be corrected by changing the length of the regulating pin 4 during operation, by the aid of a heater resistor.
- FIG. 2 shows the location of the regulating pin 4 and those of the fixing pins 5 and 6 in the fixing arrangement of the nonrotating blade disk.
- the opening seen in the centre is the pulp feed aperture 7.
- FIGS. 3 and 4 show the design of the pulp grinder in greater detail.
- the surfaces of the blade disks 1 and 2 facing each other have been provided with blades 9, whereby the grinding surfaces 10 and 11 and the grinding gap 8 between them are formed.
- the non-rotating blade disk 1 has een provided with a reinforcing ring 12, to which one end of the fixing pins 4, 5 and 6 has been attached. The opposite ends of the pins have been attached to the body 13 of the grinder.
- the rotating blade disk has been mounted by means of a flange 14 on the shaft 15, which is rotated by a drive motor (not depicted).
- Within the feed aperture 7 there is a feed screw 16, which supplies pulp into the grinding gap 8 between the blades 9 of the blade disks 1 and 2, whence the pulp moves under effect of centrifugal force to the outer periphery and further to the exit port 17.
- FIG. 5 the design of the regulating pin 4 has been shown in greater detail.
- the end 18 of the regulating pin 4 adjacent to the blade disk has been attached by thread to the reinforcing ring 12 of the non-rotating blade disk 1.
- the opposite end of the regulating pin 4, indicated by reference numeral 19, has been attached to the body 13 by means of a shoulder 20 on the pin and a nut 21. Heat transfer from the pin 4 to the body 13 has been prevented by means of insulators 22.
- Within the regulating pin 4 there is a concentric hollow cavity 23, containing a resistance 24, and a duct 25 intended for the leads of the electrical resistance carries out from the cavity 23.
- the duct 25 is thermally insulated against the body of the pin 4 by the insulation 26.
- the end 19 of the pin 4 attached to the body has been provided with a nut end 27 and a packing 28.
- the blade disks 1 and 2 Prior to starting the grinder, the blade disks 1 and 2 are adjusted to be exactly parallel. After the grinder has reached its operating temperature, 3 to 4 hours after starting, the body has been bent to such degree that the rotating blade disk 2 is no longer parallel with the nonrotating blade disk 1. In the exemplary case, the distance between the blade disks becomes larger at their upper margin than at the lower margin. The difference in the distances may be on the order of 0.15 mm.
- the disks are then adjusted to be parallel, during operation, by increasing the current passing through the resistance 24 within the regulating pin 4, whereby the pin 4 is warmed and lengthens, pushing the non-rotating blade disk 1 at its upper edge toward the rotating blade disk 2 until the blade disks are parallel. Parallel-relationship may be observed by measuring the distances between the blade disks at the top and bottom or by observing the quality of the pulp. When the pulp presents a good quality, the blade disks are parallel.
- the distance between the blade disks may become larger at the bottom than at the top.
- the pins 5 and 6 below the axis may be arranged to be regulating pins, or two fixing pins may be provided above the axis and one regulating pin under the axis in the vertical plane passing through the axis.
- adjustment may also be accomplished in this case by means of an arrangement as in the example. It is possible to make such arrangements that an electric current already flows through the resistance 24 when the pulp grinder is started and that the temperature of the regulating pin 4 is such that it can be lowered by reducing the current.
- a regulating range of the regulating pin temperature of :50C suffices for parallel adjustment of the blade disks in both cases in question.
- a further advantage of the device according to the invention is that by its aid the parallel alignment control of the blade disks can be easily automated, whereby the blade disks will at all times be parallel, independent of the temperature of the pulp grinder.
- the fixing pin may be made to receive interiorly thereof a temperature controlled heating fluid so as to adjust the heat and length of the pin.
- the pin may be heated through imparting vibration thereto by a suitable device such as, for example, an ultrasonic vibrator (not shown).
- the number of blade disks and grinding gaps may vary, and introduction of the pulp may be in a manner different from that described in the exemplary case.
- the shape, and the attachments and insulations, of the fixing and regulating pins may also be of another kind.
- the regulating pin need not either necessarily to be located above the axis; it may also lie under the axis in a vertical plane passing through the axis.
- Improvement in a pulp grinder for cellulose, paper or other equivalent pulp comprising at least one non-rotating blade disk and at least one rotating blade disk which have grinding surfaces facing each other, the non-rotating blade disk being secured to the body of the grinder by means of three fixing pins, said fixing pins being adapted to contact the non-rotating blade disk and deflect the latter so that the grinding surfaces are adjustable to be parallel, wherein the improvement comprises in that at least one fixing pin includes means for heating said pin so as to be variable in length.
- Pulp grinder as claimed in claim 1, said fixing pin being hollow, and said means for heating said pin comprising an electrical resistor located within said hollow pin.
Abstract
Pulp grinder intended for cellulose, paper or other equivalent pulp and comprising at least one non-rotating blade disk and at least one rotating blade disk with grinding surfaces opposing each other, the non-rotating blade disk being secured to the body of the grinder by the use of three fixing pins, by the aid of which the grinding surfaces can be adjusted to be parallel. At least one fixing pin is heatable, and thus changeable as to its length, for instance with the aid of electric current, of a temperature-controlled fluid or vibration.
Description
United States Patent [191 Syrjanen [4 1 Nov. 19, 1974 1 PULP GRINDER [75] Inventor: Ahti Syrjanen, Valkeakoski, Finland [73] Assignee: Yhtyneet Paperitehtaat 0y Jylhavaara, Valkleakoski, Finland 22 Filed: Aug. 23, 1972 211 Appl. No.: 283,230
[30] Foreign Application Priority Data Aug. 27, 1971 Finland 2397/71 [52] US. Cl 241/37, 241/250, 241/259.1 [51] Int. Cl. B026 7/06, 1302c 7/14 [58] Field of Search 241/244, 250, 259.1, 259.3, 24l/259.2, 37
[56] References Cited UNITED STATES PATENTS 2,548,599 4/1951 Garr 241/37 2,947,485 8/1960 Woodryff et al 241/259.2 X 2,971,704 2/1961 .lohansson 241/259.1 X 3,302,893 2/1967 Feder et a1 241/37 FOREIGN PATENTS OR APPLICATIONS 222,474 12/1961 Austria 241/244 Primary ExaminerGranvil1e Y. Custer, Jr.
Assistant Examiner-Howard N. Goldberg Attorney, Agent, or Firm-Waters, Roditi, Schwartz & Nissen 1 1 ABSTRACT Pulp grinder intended for cellulose, paper or other equivalent pulp and comprising at least one nonrotating blade disk and at least one rotating blade disk with grinding surfaces opposing each other, the nonrotating blade disk being secured to the body of the grinder by the use of three fixing pins, by the aid of which the grinding surfaces can be adjusted to be parallel. At least one fixing pin is heatable, and thus changeable as to its length, for instance with the aid of electric current, of a temperature-controlled fluid or vibration.
2 Claims, 5 Drawing Figures PULP GRINDER In grinders the distance between the blade disks rotating with reference to each other, or the grinding gaps, are adjusted by displacing one or several blade disks axially.
This is accomplished according to methods previously known in themselves with the aid of mechanical, hydraulic or pneumatic devices. The quality of the ground pulp is decisively influenced not only by the width of the grinding gap but also by the accuracy with which the grinding surfaces are parallel. During operation of the pulp grinder, certain parts of the body structure of the grinder warm up, causing thermal expansion and as the result of this, an error in the parallel alignment. When the grinding surfaces no longer are parallel, the quality of the pulp deteriorates. Even an error as small as 0.05 mm in the parallel alignment of the grinding surfaces has to be corrected. In devices of prior art the practice has been followed that the pulp grinder is stopped after it has reached operating temperature and an impairment of the pulp quality due to thermal stresses has been noticed. Subsequently, the grinding gaps have been adjusted with the aid of one or several fixing pins to be parallel once again.
The aim of the present invention is to eliminate this drawback and to provide a pulp grinder wherein the adjustment can be made during operation of the grinder. The invention is characterized in that at least one fixing pin is heatable, and thereby adjustable in its length, for instance by the aid of electric current, of a temperature-controlled medium or of vibration. These modes of producing and transferring heat may all be applied for changing the length of one fixing pin, or regulating pin.
According to an advantageous embodiment, at least one fixing pin or regulating pin is heatable by the aid of an electrical resistor placed in a cavity within it. Hereby such an effect is achieved that when the power in the electrical resistor is regulated, for instance, by changing the intensity of the current passing through it, the temperature of the pin is altered and the resultant change of the pin s length adjusts the nonrotating blade disk to be in desired position with reference to the rotating blade disk. It is also possible to place in the cavity electrodes, which are supplied with electricity, while the cavity is filled with a liquid or gas.
According to another embodiment, the regulating pin itself is an electrical resistor. It is also possible to place within the pin an induction coil, by means of which the temperature may be raised.
Heat may be introduced along with a fluid. For conducting the fluid, ducts are provided in the regulating pin in which a circulation of temperature-controlled liquid or gas is arranged. In this case it is advantageous that it is also possible to cool the pin.
Heat transfer may also be by conduction with the aid of a solid, thermally well conductive substance. According to a further embodiment, the regulating pin may be heated by the aid of vibration, such as ultrasound.
The invention is described in closer detail in the following by the aid of an example, with reference to the attached drawing, wherein FIG. 1 represents, schematically, a disk grinder with one blade gap, in section carried along the line I--I in FIG. 2,
FIG. 2 shows the section along the line llll in FIG.
FIG. 3 is a more detailed longitudinal section of the pulp grinder, along the line lII-IIl in FIG. 4,
FIG. 4 shows the pulp grinder of FIG. 3, sectioned along the line IVIV in FIG. 3, and
FIG. 5 is the regulating pin in the upper part of FIG. 3, on a larger scale and longitudinally sectioned.
Referring to FIG. 1, the angle a illustrates the angle between the non-rotating blade disk 1 and the rotating blade disk 2, which is the deviation from parallel alignment due to bending of the grinder body 13. The bending of the body 13, again, is caused by the fact that the pulp grinder reaches, after it has been started, its operating temperature. According to the invention, this error deviation may be corrected by changing the length of the regulating pin 4 during operation, by the aid of a heater resistor.
FIG. 2 shows the location of the regulating pin 4 and those of the fixing pins 5 and 6 in the fixing arrangement of the nonrotating blade disk. The opening seen in the centre is the pulp feed aperture 7.
FIGS. 3 and 4 show the design of the pulp grinder in greater detail. The surfaces of the blade disks 1 and 2 facing each other have been provided with blades 9, whereby the grinding surfaces 10 and 11 and the grinding gap 8 between them are formed. The non-rotating blade disk 1 has een provided with a reinforcing ring 12, to which one end of the fixing pins 4, 5 and 6 has been attached. The opposite ends of the pins have been attached to the body 13 of the grinder. The rotating blade disk has been mounted by means of a flange 14 on the shaft 15, which is rotated by a drive motor (not depicted). Within the feed aperture 7 there is a feed screw 16, which supplies pulp into the grinding gap 8 between the blades 9 of the blade disks 1 and 2, whence the pulp moves under effect of centrifugal force to the outer periphery and further to the exit port 17.
In FIG. 5 the design of the regulating pin 4 has been shown in greater detail. The end 18 of the regulating pin 4 adjacent to the blade disk has been attached by thread to the reinforcing ring 12 of the non-rotating blade disk 1. The opposite end of the regulating pin 4, indicated by reference numeral 19, has been attached to the body 13 by means of a shoulder 20 on the pin and a nut 21. Heat transfer from the pin 4 to the body 13 has been prevented by means of insulators 22. Within the regulating pin 4 there is a concentric hollow cavity 23, containing a resistance 24, and a duct 25 intended for the leads of the electrical resistance carries out from the cavity 23. The duct 25 is thermally insulated against the body of the pin 4 by the insulation 26. The end 19 of the pin 4 attached to the body has been provided with a nut end 27 and a packing 28.
Prior to starting the grinder, the blade disks 1 and 2 are adjusted to be exactly parallel. After the grinder has reached its operating temperature, 3 to 4 hours after starting, the body has been bent to such degree that the rotating blade disk 2 is no longer parallel with the nonrotating blade disk 1. In the exemplary case, the distance between the blade disks becomes larger at their upper margin than at the lower margin. The difference in the distances may be on the order of 0.15 mm. The disks are then adjusted to be parallel, during operation, by increasing the current passing through the resistance 24 within the regulating pin 4, whereby the pin 4 is warmed and lengthens, pushing the non-rotating blade disk 1 at its upper edge toward the rotating blade disk 2 until the blade disks are parallel. Parallel-relationship may be observed by measuring the distances between the blade disks at the top and bottom or by observing the quality of the pulp. When the pulp presents a good quality, the blade disks are parallel.
in some cases the distance between the blade disks may become larger at the bottom than at the top. In that instance the pins 5 and 6 below the axis may be arranged to be regulating pins, or two fixing pins may be provided above the axis and one regulating pin under the axis in the vertical plane passing through the axis. However, adjustment may also be accomplished in this case by means of an arrangement as in the example. It is possible to make such arrangements that an electric current already flows through the resistance 24 when the pulp grinder is started and that the temperature of the regulating pin 4 is such that it can be lowered by reducing the current. A regulating range of the regulating pin temperature of :50C suffices for parallel adjustment of the blade disks in both cases in question. A further advantage of the device according to the invention is that by its aid the parallel alignment control of the blade disks can be easily automated, whereby the blade disks will at all times be parallel, independent of the temperature of the pulp grinder.
If desired, in lieu of an electrical resistor, the fixing pin may be made to receive interiorly thereof a temperature controlled heating fluid so as to adjust the heat and length of the pin. Furthermore, the pin may be heated through imparting vibration thereto by a suitable device such as, for example, an ultrasonic vibrator (not shown).
It is obvious to one skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below. For instance, the number of blade disks and grinding gaps may vary, and introduction of the pulp may be in a manner different from that described in the exemplary case. The shape, and the attachments and insulations, of the fixing and regulating pins may also be of another kind. Depending on the design of the pulp grinder, the regulating pin need not either necessarily to be located above the axis; it may also lie under the axis in a vertical plane passing through the axis.
I claim:
1. Improvement in a pulp grinder for cellulose, paper or other equivalent pulp and comprising at least one non-rotating blade disk and at least one rotating blade disk which have grinding surfaces facing each other, the non-rotating blade disk being secured to the body of the grinder by means of three fixing pins, said fixing pins being adapted to contact the non-rotating blade disk and deflect the latter so that the grinding surfaces are adjustable to be parallel, wherein the improvement comprises in that at least one fixing pin includes means for heating said pin so as to be variable in length.
2. Pulp grinder as claimed in claim 1, said fixing pin being hollow, and said means for heating said pin comprising an electrical resistor located within said hollow pin.
Claims (2)
1. Improvement in a pulp grinder for cellulose, paper or other equivalent pulp and comprising at least one non-rotating blade disk and at least one rotating blade disk which have grinding surfaces facing each other, the non-rotating blade disk being secured to the body of the grinder by means of three fixing pins, said fixing pins being adapted to contact the non-rotating blade disk and deflect the latter so that the grinding surfaces are adjustable to be parallel, wherein the improvement comprises in that at least one fixing pin includes means for heating said pin so as to be variable in length.
2. Pulp grinder as claimed in claim 1, said fixing pin being hollow, and said means for heating said pin comprising an electrical resistor located within said hollow pin.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI712397A FI49194C (en) | 1971-08-27 | 1971-08-27 | Pulp grinder |
Publications (1)
Publication Number | Publication Date |
---|---|
US3848814A true US3848814A (en) | 1974-11-19 |
Family
ID=8507045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00283230A Expired - Lifetime US3848814A (en) | 1971-08-27 | 1972-08-23 | Pulp grinder |
Country Status (7)
Country | Link |
---|---|
US (1) | US3848814A (en) |
JP (1) | JPS4833104A (en) |
CA (1) | CA962494A (en) |
DE (1) | DE2239119A1 (en) |
FI (1) | FI49194C (en) |
FR (1) | FR2151889A5 (en) |
GB (1) | GB1365204A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4527473A (en) * | 1981-07-13 | 1985-07-09 | Littleton Francis J | Thermal adjustment apparatus for rotating machines |
US4674689A (en) * | 1980-11-19 | 1987-06-23 | Ranks Hovis Mcdougall Ltd. | Milling machines |
US4820980A (en) * | 1987-05-04 | 1989-04-11 | Dodson Edgars Darryl | Gap, wear and tram measurement system and method for grinding machines |
US5544819A (en) * | 1993-06-11 | 1996-08-13 | The Haigh Engineering Company Ltd. | Rotary disintegrators |
US6657427B2 (en) * | 2000-03-23 | 2003-12-02 | D/A Production Ab | Method and device for measuring a distance between a stator and a rotor |
US20040169506A1 (en) * | 2001-09-26 | 2004-09-02 | Bengt Akerblom | Transducer for distance measurement |
WO2007094711A1 (en) * | 2006-01-16 | 2007-08-23 | Metso Paper Inc. | A method and a device for controlling the alignment between refining surfaces |
CN108301246A (en) * | 2017-12-31 | 2018-07-20 | 东莞市泰昌纸业有限公司 | Long fibre is reduced during using the defibrination of regenerated papermaking to fracture the method for rate |
CN110055791A (en) * | 2019-04-17 | 2019-07-26 | 南宁学院 | Laboratory ultrasound deinking equipment |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2499115A1 (en) * | 1981-02-02 | 1982-08-06 | Chleq Frote Cie | Paper pulp refiner - has hand control for correct position of rotor, and fine adjustment device controlled by temp. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2548599A (en) * | 1948-11-02 | 1951-04-10 | Gen Electric | Clearance control |
US2947485A (en) * | 1954-02-05 | 1960-08-02 | Bauer Bros Co | Disc refiner |
US2971704A (en) * | 1955-11-07 | 1961-02-14 | Asplund Arne J A | Grinding apparatus for disintegrating fibrous material |
AT222474B (en) * | 1959-12-28 | 1962-07-25 | Josef Richter | Crushing machine for feed |
US3302893A (en) * | 1964-02-18 | 1967-02-07 | Wedco | Disc mill |
-
1971
- 1971-08-27 FI FI712397A patent/FI49194C/en active
-
1972
- 1972-08-04 GB GB3645472A patent/GB1365204A/en not_active Expired
- 1972-08-09 DE DE2239119A patent/DE2239119A1/en active Pending
- 1972-08-14 CA CA149,367A patent/CA962494A/en not_active Expired
- 1972-08-18 JP JP47082672A patent/JPS4833104A/ja active Pending
- 1972-08-22 FR FR7229950A patent/FR2151889A5/fr not_active Expired
- 1972-08-23 US US00283230A patent/US3848814A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2548599A (en) * | 1948-11-02 | 1951-04-10 | Gen Electric | Clearance control |
US2947485A (en) * | 1954-02-05 | 1960-08-02 | Bauer Bros Co | Disc refiner |
US2971704A (en) * | 1955-11-07 | 1961-02-14 | Asplund Arne J A | Grinding apparatus for disintegrating fibrous material |
AT222474B (en) * | 1959-12-28 | 1962-07-25 | Josef Richter | Crushing machine for feed |
US3302893A (en) * | 1964-02-18 | 1967-02-07 | Wedco | Disc mill |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4674689A (en) * | 1980-11-19 | 1987-06-23 | Ranks Hovis Mcdougall Ltd. | Milling machines |
US4527473A (en) * | 1981-07-13 | 1985-07-09 | Littleton Francis J | Thermal adjustment apparatus for rotating machines |
US4820980A (en) * | 1987-05-04 | 1989-04-11 | Dodson Edgars Darryl | Gap, wear and tram measurement system and method for grinding machines |
US5544819A (en) * | 1993-06-11 | 1996-08-13 | The Haigh Engineering Company Ltd. | Rotary disintegrators |
US6657427B2 (en) * | 2000-03-23 | 2003-12-02 | D/A Production Ab | Method and device for measuring a distance between a stator and a rotor |
US7064536B2 (en) * | 2001-09-26 | 2006-06-20 | Daprox Ab | Transducer for distance measurement |
US20040169506A1 (en) * | 2001-09-26 | 2004-09-02 | Bengt Akerblom | Transducer for distance measurement |
WO2007094711A1 (en) * | 2006-01-16 | 2007-08-23 | Metso Paper Inc. | A method and a device for controlling the alignment between refining surfaces |
US20090032630A1 (en) * | 2006-01-16 | 2009-02-05 | Metso Paper, Inc. | Method and a Device for Controlling the Alignment Between Refining Surfaces |
US7845583B2 (en) | 2006-01-16 | 2010-12-07 | Metso Paper, Inc. | Method and a device for controlling the alignment between refining surfaces |
CN101360564B (en) * | 2006-01-16 | 2012-07-25 | 美佐纸业股份有限公司 | Method and a device for controlling the alignment between refining surfaces |
CN108301246A (en) * | 2017-12-31 | 2018-07-20 | 东莞市泰昌纸业有限公司 | Long fibre is reduced during using the defibrination of regenerated papermaking to fracture the method for rate |
CN108301246B (en) * | 2017-12-31 | 2019-02-26 | 东莞市泰昌纸业有限公司 | Long fibre is reduced during using the defibrination of regenerated papermaking to fracture the method for rate |
CN110055791A (en) * | 2019-04-17 | 2019-07-26 | 南宁学院 | Laboratory ultrasound deinking equipment |
CN110055791B (en) * | 2019-04-17 | 2020-11-06 | 南宁学院 | Laboratory ultrasonic waste paper deinking equipment |
Also Published As
Publication number | Publication date |
---|---|
FI49194C (en) | 1975-04-10 |
GB1365204A (en) | 1974-08-29 |
DE2239119A1 (en) | 1973-03-01 |
JPS4833104A (en) | 1973-05-08 |
FR2151889A5 (en) | 1973-04-20 |
FI49194B (en) | 1974-12-31 |
CA962494A (en) | 1975-02-11 |
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