EP0074935A2 - Self-cleaning reciprocating screen - Google Patents
Self-cleaning reciprocating screen Download PDFInfo
- Publication number
- EP0074935A2 EP0074935A2 EP82830231A EP82830231A EP0074935A2 EP 0074935 A2 EP0074935 A2 EP 0074935A2 EP 82830231 A EP82830231 A EP 82830231A EP 82830231 A EP82830231 A EP 82830231A EP 0074935 A2 EP0074935 A2 EP 0074935A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- net
- screen
- wires
- underlying
- vibrating
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4663—Multi-layer screening surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4672—Woven meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/48—Stretching devices for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
Definitions
- the present invention relates to a vibrating wire self-cleaning reciprocating screen particularly suitable for sieving and screening both dry and more or less damp or damp materials of various types and granulations, and preferably gravelly but also other earthy or crushing materials, including metallic or non- metallic materials, of various type, shape and structure, in which during the screening obstructions of the screening and sieving net might occur.
- Dry or- damp curve-shaped or multiform grain sieved material can easily obstruct the net, especially if these grains are mixed with lamellar or schistose mixing materials (e.g. clay, kaolin, etc.).
- lamellar or schistose mixing materials e.g. clay, kaolin, etc.
- the so-called “harp nets” have recently been manufactured, namely nets in which now and then the longitudinal wires do not present weaving through variously spaced weft to realize free length variable widths which aid the vibrations of the warp wires in a continuous way and according to a perpendicular movement to the screening plane, being the transversal wefts suitably spaced between them also at irregular intervals.
- the scope of the invention as claimed is to provide a remedy to the above-mentioned drawbacks and more particularly to carry out a net screen in which the above-described obstructions do not occur.
- the invention essentially consists in the realization of a screening net of a traditional type, corresponding to the specific screening requirements, to screen material sliding in longitudinal direction, in which on said screening net a number of longitudinal wires are fixed free to vibrate according to a determinate frequency with the screening vibration.
- the screen consists essentially of a well-known type weft and warp suitably shaped net " A”, laterally stretched and hooked by two longitudinal welts "C” for supporting the same net in order to form the screening plane.
- the screening net "A" can have any suitable shape and will consist of weft 1 and warp 2 according to a convenient system while in the specific case the vibrating wires 3 will be transversally fixed by a further weaving of transversal weft 2'.
- FIGS lA,2A,3A,4A show varied solutions in which in Figures 1A and 2A the removal of the lateral welts of the underlying screening net "A" is provided for a certain portion of a determinate number of longitudinal wires 1 by means of shearing said wires in order to define a free opening "i” with a net of only transversal warpless wires 2 and in which in correspondence with such openings "i” a free jutting out part is situated with weft wires 2' of the upper vibrating net "B” so that these free ones can be placed side by side with the underlying weft screening wires 2 in order to lie on the same plane during the lateral seam "C" as shown in Figure 3A.
- the set of weft transversal wires 2' can be then tightened by means of seam wires 7 as shown in Figures 2A and 4A and the weft wires 2' can be of a continuous type as shown on the right side of Figure 4A or of a discontinuous type as shown on the left side of Figure 4A in order to form sets of wires independently vibrating in groups, being these binding devices always of a continuous type at the end 5 to stretch the longitudinal vibrating wires 3.
- the weft wires 2' can be in single or multiple number.
- Figures 1B,2B,5B show a further variation to the preceding solutions in which the net or screening plane consists of an underlying screening net "A" with a superimposed self-cleaning net “B” preferably made of separate panels fixed to the underlying net in the upstream joint zones with its reinforcement 2' by means of intermediate clamping bolts 8.
- the net or screening plane consists of an underlying screening net "A” with a superimposed self-cleaning net “B” preferably made of separate panels fixed to the underlying net in the upstream joint zones with its reinforcement 2' by means of intermediate clamping bolts 8.
- a main characteristic of such structured vibrating net panels "B” lies in that each vibrating wire 3 is fixed ahead the braiding band 2', while at the opposite end it is free to vibrate, obviously being the braiding band 2' upstream situated and the free end of the wires 3 downstream oriented as to the advancing material to be screened; so in the joint zones "g" there will be the end of the vibrating wires 3 free for each panel “B” and the beginning of the braiding band 2' of the following one.
- the tightening of the band 2 of the panels "B” on the underlying net "A” will be carried out with bolts 8, while at the end of the panels, before the joint zones "g" and also of the screen 5', the wires 3 could end also before.
- a reinforcement braiding of the underlying net "A” can be carried out particularly for the weft wires 2, with the addition of several adjacent weft wires 6. This will cause a better resistance and ruggedness and a consequent increased life of the entire net.
- the underlying screening net "A” can be similarly made of panels and tightened with the same clamping bolts 8 together with the superimposed net "B”.
- a band "D” can be placed, consisting of a belt 7 sufficiently stretched between the opposite hooking and stretching welts "C” by means of tightening with suitable opening "i” equal in size to the underlying screening net "A”, in order to allow a tightening of the device without overlapping.
- Such stretched belt 7 supports inserted annular spacing bosses 9 to keep in a uniform position the respective set of vibrating wires for the required self-cleaning effect 3.
Abstract
Description
- The present invention relates to a vibrating wire self-cleaning reciprocating screen particularly suitable for sieving and screening both dry and more or less damp or damp materials of various types and granulations, and preferably gravelly but also other earthy or crushing materials, including metallic or non- metallic materials, of various type, shape and structure, in which during the screening obstructions of the screening and sieving net might occur.
- Dry or- damp curve-shaped or multiform grain sieved material can easily obstruct the net, especially if these grains are mixed with lamellar or schistose mixing materials (e.g. clay, kaolin, etc.).
- To obviate the above-mentioned drawbacks, the so-called "harp nets" have recently been manufactured, namely nets in which now and then the longitudinal wires do not present weaving through variously spaced weft to realize free length variable widths which aid the vibrations of the warp wires in a continuous way and according to a perpendicular movement to the screening plane, being the transversal wefts suitably spaced between them also at irregular intervals.
- However, these solutions do not allow a uniform and regular screening of the material for the irregularity of the passage In order.to obviate the above-mentioned disadvantage the so-called "serpa-arpa" nets have been manufactured, in which these nets have longitudinal wires with ondulations on the net plane corresponding to the screening one, which allows to obtain substantially uniform openings corresponding to the wire ondulation pitch. Even if these nets obviate the above-cited drawback, nevertheless they present a screening passage inequality for the easy deformation of the nets and the excessive elasticity one from the other independent, without considering the main essence in which the entire net vibrates in a uniform way which does not prevent, in particularly heavy cases, an unavoidable obstruction of the same net; further non-braided wires open easily.
- The scope of the invention as claimed is to provide a remedy to the above-mentioned drawbacks and more particularly to carry out a net screen in which the above-described obstructions do not occur.
- According to the above-stated purposes and in connection with the claimed characteristics, the invention essentially consists in the realization of a screening net of a traditional type, corresponding to the specific screening requirements, to screen material sliding in longitudinal direction, in which on said screening net a number of longitudinal wires are fixed free to vibrate according to a determinate frequency with the screening vibration..
- The above-mentioned characteristics will be anyhow better understood and pointed out and other ones will appear in the following detailed description of two preferred embodiments of the invention, with reference to the enclosed drawings, in which:-
- Figure 1 is a schematic perspective view of a screen according to a first embodiment of the invention; Figure 2 is a longitudinal vertical section partial net view taken parallelly to the hooking and stretching lateral welts (material sliding direction) as shown in the screen of Figure 1, in a second embodiment of the invention; Figure 3 is a partial top view of the nets of Figure 2; Figure 1A is a schematic perspective partial view of the underlying screening net on its longitudinal welt before the tightening with the superimposed net by means of the hooking and stretching lateral welts; Figure 2A is a partial lateral view of the superimposed cleaning net in correspondence to the superimposition with the underlying screening net portion of the preceding figure and with visualization of a weft transversal wire hooking system; Figure 3A is a transversal section partial view of a longitudinal welt of the complete hooked nets to realize the screen according to the present invention; Figure 4A is a top schematic view of two opposed embodiment forms of the screen, without visualization of the underlying screening net; Figure 1B is a transversal partial section screen view normally to the stretching and hooking lateral welts of a further embodiment; Figure 2B is a top partial plan view of the screen portion of Figure 1B; Figure 3B is a partial plan screen view showing only the underlying screening net near a lateral welt, with a weaving system comprising transversal reinforcements of the weft in the areas mainly subject to break and wear; Figure 4B is a further embodiment of the transversal reinforcement shown in Figure 3B, that is both weft and warp weaving doubling; Figure 5B is a schematic plan screen panel view of an embodiment in which plural net superimposing panels are connected on the underlying screening net in order to improve the self-cleaning effect and allow the replacement of the worn out net superimposing panels.
- As it can be noticed from the above figures, the screen consists essentially of a well-known type weft and warp suitably shaped net "A", laterally stretched and hooked by two longitudinal welts "C" for supporting the same net in order to form the screening plane.
- According to the innovation and to Figure 1,' on the underlying screening net "A" and within the lateral welts "C" a second superimposed net "B" is tightened, which presents two bands of net ends with terminal transversal wires 2', as the underlying net "A", which stretch a set of
longitudinal wires 3 which beating in vibration on the underlying net "A" keep it clean. - In the varied embodiments of Figures 2 and 3 the same net "B" is carried out with the end weaving 1,2,2' of an alternate
longitudinal wire 3 which in the intermediate portion passes on the underlying net "A" and is further suitably ondulated instead of being straight as that of Figure 1. - In this case the screening net "A" can have any suitable shape and will consist of weft 1 and
warp 2 according to a convenient system while in the specific case the vibratingwires 3 will be transversally fixed by a further weaving of transversal weft 2'. - Both with this solution and the preceding one, the superiorly supported vibrating
wires 3 are suitably and elastically stretched so as to vibrate and break the incrostations or obstructions on the underlying net "A", thus making the material screening easier. Figures lA,2A,3A,4A show varied solutions in which in Figures 1A and 2A the removal of the lateral welts of the underlying screening net "A" is provided for a certain portion of a determinate number of longitudinal wires 1 by means of shearing said wires in order to define a free opening "i" with a net of onlytransversal warpless wires 2 and in which in correspondence with such openings "i" a free jutting out part is situated with weft wires 2' of the upper vibrating net "B" so that these free ones can be placed side by side with the underlyingweft screening wires 2 in order to lie on the same plane during the lateral seam "C" as shown in Figure 3A. - Thus the advantage will be obtained that the
warp wires 3 suitable to the separation of the material on the net "A" will be tightly hold by the weft wires 2' and also bindingcrop ends 4 can be provided. - The set of weft transversal wires 2' can be then tightened by means of
seam wires 7 as shown in Figures 2A and 4A and the weft wires 2' can be of a continuous type as shown on the right side of Figure 4A or of a discontinuous type as shown on the left side of Figure 4A in order to form sets of wires independently vibrating in groups, being these binding devices always of a continuous type at theend 5 to stretch thelongitudinal vibrating wires 3. Naturally, the weft wires 2' can be in single or multiple number. - Figures 1B,2B,5B show a further variation to the preceding solutions in which the net or screening plane consists of an underlying screening net "A" with a superimposed self-cleaning net "B" preferably made of separate panels fixed to the underlying net in the upstream joint zones with its reinforcement 2' by means of
intermediate clamping bolts 8. Thus a reduction of the free length "L" of the vibratingwires 3 is obtained. A main characteristic of such structured vibrating net panels "B" lies in that each vibratingwire 3 is fixed ahead the braiding band 2', while at the opposite end it is free to vibrate, obviously being the braiding band 2' upstream situated and the free end of thewires 3 downstream oriented as to the advancing material to be screened; so in the joint zones "g" there will be the end of the vibratingwires 3 free for each panel "B" and the beginning of the braiding band 2' of the following one. The tightening of theband 2 of the panels "B" on the underlying net "A" will be carried out withbolts 8, while at the end of the panels, before the joint zones "g" and also of the screen 5', thewires 3 could end also before. - As shown in Figures 3B and 4B, in the joint zones "g" a reinforcement braiding of the underlying net "A" can be carried out particularly for the
weft wires 2, with the addition of severaladjacent weft wires 6. This will cause a better resistance and ruggedness and a consequent increased life of the entire net. Also the underlying screening net "A" can be similarly made of panels and tightened with thesame clamping bolts 8 together with the superimposed net "B". - As shown in Figures 1B, 2B, 5B, superiorly to each net panel "B",a band "D" can be placed, consisting of a
belt 7 sufficiently stretched between the opposite hooking and stretching welts "C" by means of tightening with suitable opening "i" equal in size to the underlying screening net "A", in order to allow a tightening of the device without overlapping. Such stretchedbelt 7 supports inserted annular spacing bosses 9 to keep in a uniform position the respective set of vibrating wires for the required self-cleaning effect 3. Udine, 06 Settembre 1982
Claims (12)
that on said screening net means (A) a superimposed net means (B) is fixed, provided with a number of longitudinal wires (3) as to the advancing direction of the material to be screened, parallel between them and spaced out one another and free to vibrate as to the underlying screening net (A) with the sieving vibrations.
that each longitudinal vibrating wire (3) on the screening net (A) is ondulated.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT83466/81A IT1146795B (en) | 1981-09-15 | 1981-09-15 | Self-cleaning reciprocated sieving screen |
IT8346681 | 1981-09-15 | ||
IT6032782U IT8260327V0 (en) | 1982-02-18 | 1982-02-18 | SELF-CLEANING SCREEN PERFECTED. |
IT6032782U | 1982-02-18 | ||
IT83439/82A IT1158138B (en) | 1982-08-31 | 1982-08-31 | Self-cleaning reciprocated sieving screen |
IT8343982 | 1982-08-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0074935A2 true EP0074935A2 (en) | 1983-03-23 |
EP0074935A3 EP0074935A3 (en) | 1984-11-07 |
EP0074935B1 EP0074935B1 (en) | 1988-05-04 |
Family
ID=27273737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82830231A Expired EP0074935B1 (en) | 1981-09-15 | 1982-09-10 | Self-cleaning reciprocating screen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0074935B1 (en) |
DE (1) | DE3278423D1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000025890A1 (en) * | 1998-10-30 | 2000-05-11 | Tuboscope I/P Inc. | A screen for use in a shale shaker and method for using same |
US6340089B1 (en) | 1993-01-13 | 2002-01-22 | Derrick Manufacturing Corporation | Method of fabricating undulating screen for vibratory screening machine |
GB2390831A (en) * | 2002-06-06 | 2004-01-21 | Haver & Boecker | Wire netting weave for sieve tray |
WO2004096453A2 (en) * | 2003-05-02 | 2004-11-11 | Varco I/P Inc. | Screen assembly for a vibratory separator |
CN103316839A (en) * | 2013-07-17 | 2013-09-25 | 佳施加德士(苏州)塑料有限公司 | Screen |
CN103752510A (en) * | 2014-02-17 | 2014-04-30 | 中国能建集团装备有限公司北京技术中心 | Screening plate of self-cleaning vibrating screen |
CN112676146A (en) * | 2020-12-02 | 2021-04-20 | 叶喜春 | Aggregate screening and conveying device for building garbage brickmaking |
US20210121917A1 (en) * | 2019-10-29 | 2021-04-29 | General Electric Company | Powder Sieving System Using a Broad Frequency Filter |
CN112743104A (en) * | 2019-10-29 | 2021-05-04 | 通用电气公司 | Powder recovery system for multiple metal powder processing devices |
EP3815797A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Filter for powder system |
EP3815796A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder reclamation system and operating method |
EP3815800A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder reclamation system and operating method |
CN116174297A (en) * | 2023-04-21 | 2023-05-30 | 四川远方云天食品科技有限公司 | Raw material anti-blocking screening device for hotpot condiment production |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1089947A (en) * | 1953-04-09 | 1955-03-24 | Screening device and its applications | |
GB856181A (en) * | 1958-11-11 | 1960-12-14 | Steinhaus Gmbh | Improvements relating to wire screens |
GB1258995A (en) * | 1969-11-11 | 1972-01-05 | ||
FR2407026A1 (en) * | 1977-10-26 | 1979-05-25 | United Wire Group Ltd | Vibration sieving twin screen machine - comprises fine mesh nylon monofil and large mesh metal wire nets |
-
1982
- 1982-09-10 EP EP82830231A patent/EP0074935B1/en not_active Expired
- 1982-09-10 DE DE8282830231T patent/DE3278423D1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1089947A (en) * | 1953-04-09 | 1955-03-24 | Screening device and its applications | |
GB856181A (en) * | 1958-11-11 | 1960-12-14 | Steinhaus Gmbh | Improvements relating to wire screens |
GB1258995A (en) * | 1969-11-11 | 1972-01-05 | ||
FR2407026A1 (en) * | 1977-10-26 | 1979-05-25 | United Wire Group Ltd | Vibration sieving twin screen machine - comprises fine mesh nylon monofil and large mesh metal wire nets |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6340089B1 (en) | 1993-01-13 | 2002-01-22 | Derrick Manufacturing Corporation | Method of fabricating undulating screen for vibratory screening machine |
US6564947B2 (en) | 1993-01-13 | 2003-05-20 | Derrick Manufacturing Corporation | Method of screening material utilizing a plurality of undulating screen assemblies |
WO2000025890A1 (en) * | 1998-10-30 | 2000-05-11 | Tuboscope I/P Inc. | A screen for use in a shale shaker and method for using same |
US6186337B1 (en) | 1998-10-30 | 2001-02-13 | Tuboscope I/P, Inc. | Dual screen element having upper scalping screen adhered to crests of corrugated lower screen |
GB2363344A (en) * | 1998-10-30 | 2001-12-19 | Tuboscope I P Inc | A screen for use in a shale shaker and method for using same |
GB2363344B (en) * | 1998-10-30 | 2002-06-05 | Tuboscope I P Inc | A screen for use in a shale shaker and method for using same |
GB2390831A (en) * | 2002-06-06 | 2004-01-21 | Haver & Boecker | Wire netting weave for sieve tray |
GB2390831B (en) * | 2002-06-06 | 2005-08-17 | Haver & Boecker | Sieve tray for a sieve device |
WO2004096453A2 (en) * | 2003-05-02 | 2004-11-11 | Varco I/P Inc. | Screen assembly for a vibratory separator |
WO2004096453A3 (en) * | 2003-05-02 | 2005-01-20 | Varco Int | Screen assembly for a vibratory separator |
GB2416502A (en) * | 2003-05-02 | 2006-02-01 | Varco Int | Screen assembly for a vibratory separator |
GB2416502B (en) * | 2003-05-02 | 2006-11-29 | Varco Int | Screen assembly for a vibratory separator |
CN103316839A (en) * | 2013-07-17 | 2013-09-25 | 佳施加德士(苏州)塑料有限公司 | Screen |
CN103752510A (en) * | 2014-02-17 | 2014-04-30 | 中国能建集团装备有限公司北京技术中心 | Screening plate of self-cleaning vibrating screen |
EP3815796A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder reclamation system and operating method |
US20210121917A1 (en) * | 2019-10-29 | 2021-04-29 | General Electric Company | Powder Sieving System Using a Broad Frequency Filter |
CN112743104A (en) * | 2019-10-29 | 2021-05-04 | 通用电气公司 | Powder recovery system for multiple metal powder processing devices |
CN112743103A (en) * | 2019-10-29 | 2021-05-04 | 通用电气公司 | Powder screening system using broadband filter |
EP3815797A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Filter for powder system |
EP3815798A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder sieving system using a broad frequency filter |
EP3815800A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder reclamation system and operating method |
EP3815799A1 (en) * | 2019-10-29 | 2021-05-05 | General Electric Company | Powder reclamation system for multiple metal powder processing devices |
US11376632B2 (en) | 2019-10-29 | 2022-07-05 | General Electric Company | Broad frequency filter for powder system |
US11590537B2 (en) * | 2019-10-29 | 2023-02-28 | General Electric Company | Powder sieving system using a broad frequency filter |
US11794256B2 (en) | 2019-10-29 | 2023-10-24 | General Electric Company | Powder reclamation system and operating method |
CN112676146A (en) * | 2020-12-02 | 2021-04-20 | 叶喜春 | Aggregate screening and conveying device for building garbage brickmaking |
CN116174297A (en) * | 2023-04-21 | 2023-05-30 | 四川远方云天食品科技有限公司 | Raw material anti-blocking screening device for hotpot condiment production |
Also Published As
Publication number | Publication date |
---|---|
DE3278423D1 (en) | 1988-06-09 |
EP0074935B1 (en) | 1988-05-04 |
EP0074935A3 (en) | 1984-11-07 |
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