SE1551322A1 - A channel for accommodation of an endless conveyor element and a conveyor system - Google Patents
A channel for accommodation of an endless conveyor element and a conveyor system Download PDFInfo
- Publication number
- SE1551322A1 SE1551322A1 SE1551322A SE1551322A SE1551322A1 SE 1551322 A1 SE1551322 A1 SE 1551322A1 SE 1551322 A SE1551322 A SE 1551322A SE 1551322 A SE1551322 A SE 1551322A SE 1551322 A1 SE1551322 A1 SE 1551322A1
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- Prior art keywords
- channel
- endless conveyor
- conveyor element
- sectional profile
- cross sectional
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
- B65G21/22—Rails or the like engaging sliding elements or rollers attached to load-carriers or traction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chain Conveyers (AREA)
- Belt Conveyors (AREA)
Abstract
The invention relates to a channel (28) for accommodation of an endless conveyor element (18). Said channel (28) and said endless conveyor element (18) have a substantially longitudinal extension. Said endless conveyor element (18) comprises a feeding portion (24) and a return portion (26). The return portion (26) of the endless conveyor element (18) is arranged underneath the feeding portion (24) of the endless conveyor element (18). The channel (28) comprises opposite and substantially parallel delimiting means (32) and a bottom surface (34) arranged between the delimiting means (32). The height of the delimiting means (32) is in an interval between the height of the return portion (26) of the endless conveyor element (18) and the height of the return portion (26) and the feeding portion (24) of the endless conveyor element (18), so that the endless conveyor element (18) is prevented from moving in a direction in a horizontal plane, which direction is perpendicular to the longitudinal extension, by the delimiting means (32) and so that the feeding portion (24) of the endless conveyor element (18) reaches above the delimiting means (32). The invention also relates to a conveyor system (16).(Fig. 3)
Description
1 A channel for accommodation of an endless conveyor element and a conveyor systemTECHNICAL FIELD The present invention relates to a channel for accommodation of an endless conveyorelement according to the preamble of claim 1 and to a conveyor system according to the preamble of claim 11.BACKGROUND ART A conveyor is a mechanical apparatus that transports materials, packages, or items beingassembled from one place to another. A conveyor can also be used during handling of crates or in restaurants for conveying trays with dishes from the canteen to the scullery.
The conveyor comprises an endless conveyor element or several endless conveyor elementsarranged in parallel. The endless conveyor element is arranged to convey loads supportedupon it and can for example be a chain or a belt. Each endless conveyor element is arrangedabout a supporting means. The supporting means has a substantially longitudinal extensionand carries the weight of the endless conveyor element. Thus, the endless conveyor elementalso has a substantially longitudinal extension. The endless conveyor element is arrangedabout a drive element and a gear wheel and rotates about a first point and an opposite secondpoint. The drive element is arranged at the first point and the gear wheel is arranged at the second point.
The endless conveyor element comprises a feeding portion and a return portion. The feedingportion is arranged upon the supporting means and the return portion is arranged underneaththe supporting means. The supporting means can for example be a beam with a first channelon the upper side of the beam and a second channel on the underside of the beam. ln thatcase, the feeding portion of the endless conveyor element is arranged in the first channel andthe return portion of the endless conveyor element is arranged in the second channel. Thefeeding portion of the endless conveyor element is moving in a first direction and the returnportion of the endless conveyor element is moving in a second direction which is opposite the first direction. 2 An example of a known conveyor system is shown in document GB767567. The conveyorsystem comprises one endless conveyor chain. The feeding portion of the endless conveyorchain is arranged in a first channel and the return portion of the endless conveyor chain isarranged in a second channel underneath the first channel. The conveyor system has severaldrawbacks. One drawback is that it is expensive to manufacture the channels of the conveyorand thus also expensive to manufacture the conveyor system. Yet two drawbacks are that the channels and thus also the conveyor system are bulky and difficult to clean.
As a consequence, in light of the above drawbacks, there is a need of an improved channel foraccommodation of an endless conveyor element and an improved conveyor system that are less expensive to manufacture, less bulky and easier to clean.
SUMMARY OF THE INVENTION The subject of the present invention is to eliminate the drawbacks according to prior art.
This subject has been fulfilled with the channel for accommodation of an endless conveyor element and the conveyor system according to the claims.
I\/|ore specifically, the channel and the endless conveyor element have a substantiallylongitudinal extension. Said endless conveyor element comprises a feeding portion and areturn portion. The return portion of the endless conveyor element is arranged underneaththe feeding portion of the endless conveyor element. The channel comprises opposite andsubstantially parallel delimiting means and a bottom surface arranged between the delimitingmeans. The height of the delimiting means is in an interval between the height of the returnportion of the endless conveyor element and the height of the return portion and the feedingportion of the endless conveyor element, so that the endless conveyor element is preventedfrom moving in a direction in a horizontal plane, which direction is perpendicular to thelongitudinal extension, by the delimiting means and so that the feeding portion of the endless conveyor element reaches above the delimiting means.
Thereby it is possible to provide a single channel that can accommodate both the feedingportion and the return portion of the endless conveyor element and thereby two channels arenot required. One channel instead of two channels is less bulky and easier to clean. lt is also less expensive to manufacture one channel (by for example bending a metal sheet) instead of 3two channels (by for example manufacture a beam with one channel on its upper side and one channel on its lower side). ln a further aspect of the invention the endless conveyor element comprises an outer surface.The outer surface of the feeding portion is arranged to support products that are to beconveyed and the outer surface of the return portion is arranged to slide on the bottomsurface of the channel. The cross sectional profile of the channel's bottom surfacecorresponds to the cross sectional profile of the outer surface of the endless conveyorelement and/or to the cross sectional profile of at least one carrier arranged on the outer surface of the endless conveyor element.
Thereby, it is possible to provide a channel that can accommodate an endless conveyor element with or without carrier(s). ln another aspect of the invention the cross sectional profile of the channel's bottom surface is substantially straight.
Thereby, it is possible to provide a channel that can accommodate an endless conveyor element without any carrier. ln yet another aspect of the invention the cross sectional profile of the channel's bottom surface is substantially V-shaped.
Thereby, it is possible to provide a channel that can accommodate an endless conveyor element with at least one carrier having a V-shaped cross sectional profile. ln a further aspect of the invention the cross sectional profile of the channel's bottom surface is substa ntially U-shaped.
Thereby, it is possible to provide a channel that can accommodate an endless conveyor element with at least one carrier having a U-shaped cross sectional profile. ln another aspect of the invention the cross sectional profile ofthe channel's bottom surface has a substantially rectangular shape, preferably elongated and tapered. 4Thereby, it is possible to provide a channel that can accommodate an endless conveyorelement with at least one carrier having a rectangular, elongated and tapered cross sectional profile. ln yet another aspect ofthe invention the bottom surface and the delimiting means ofthe channel comprises a wear resistant material.
Thereby, it is possible to provide a channel which is more wear resistant. Thus, the channel's life time will be extended. ln a further aspect of the invention the wear resistant material comprises steel. ln another aspect of the invention the bottom surface and the delimiting means of the channel comprises a coating of low friction material.
Thereby, the friction between the bottom surface and the endless conveyor element and alsobetween the delimiting means and the endless conveyor element is reduced. Thus, it is easierfor the endless conveyor element to slide within the channel and the endless conveyor element can be moved faster. ln yet another aspect of the invention the low friction material comprises HDPE (High-density polyethylene).
The conveyor system comprises the herein mentioned channel, an endless conveyor element,a drive element and a gear wheel. The endless conveyor element is arranged about the driveelement and the gear wheel and rotates about a first point and an opposite second point. The drive element is arranged at the first point and the gear wheel is arranged at the second point.
Thereby it is possible to provide a conveyor system that can accommodate both the feedingportion and the return portion ofthe endless conveyor element in a single channel andthereby two channels are not required. A conveyor system comprising one channel instead oftwo channels is less bulky and easier to clean. lt is also less expensive to manufacture aconveyor system comprising one channel (by for example bending a metal sheet) instead of aconveyor system comprising two channels (by for example manufacture a beam with one channel on its upper side and one channel on its lower side). 5In a further aspect ofthe invention the conveyor system comprises a control unit, which control unit is arranged for activation and deactivation of the drive element.
Thereby, it is possible to provide a conveyor system that is easier to operate because the operator does not need to manually activate and deactivate the drive element.
Further embodiments and advantages ofthe present invention are evident from the following detailed description.BRIEF DESCRIPTION OF THE DRAWINGS In the following prior art and the invention are described with reference to embodiments of the present invention and the accompanying drawings, in which: Fig. 1 shows a schematic side view of a conveyor system according to prior art, Fig. 2 shows a schematic side view of the conveyor system according to the presentinvention, Fig. 3 shows a perspective view of the channel for accommodation of an endlessconveyor element according to the present invention, and Figs. 4a-d show a cross sectional profile ofthe channel' bottom surface according to the present invention.DETAILED DESCRIPTION Fig. 1 shows a schematic side view of a conveyor system 1 according to prior art. The conveyorsystem 1 comprises an endless conveyor element 2, a drive element 4 and a gear wheel 6. Theendless conveyor element 2 is arranged about and is engaged with the drive element 4 andthe gear wheel 6. The endless conveyor element 2 also rotates about a first point X and anopposite second point Y. The drive element 4 is arranged at the first point X and the gear wheel 6 is arranged at the second point Y.
Said endless conveyor element 2 comprises a feeding portion 8 and a return portion 10. Thefeeding portion 8 of the endless conveyor element 2 is arranged to support products that areto be conveyed. The return portion 10 of the endless conveyor element 2 is arranged underneath the feeding portion 8 of the endless conveyor element 2. The feeding portion 8 of 6the endless conveyor element 2 is arranged in a first channel 12 and moves in a first directionQ. The return portion 10 of the endless conveyor element 2 is arranged in a second channel 14and moves in a second direction Z. The first direction Q is a direction opposite to the seconddirection Z. Said channels 10, 12 and said endless conveyor element 2 have a substantially longitudinal extension.
The endless conveyor element 2 is in contact with the drive element 4, the gear wheel 6, thefirst channel 12 and the second channel 14, but for clarity purposes the endless conveyorelement 2 illustrated in fig. 1 is spaced apart from the drive element 4, the gear wheel 6, the first channel 12 and the second channel 14.
Fig. 2 shows a schematic side view of the conveyor system 16 according to the presentinvention. The conveyor system 16 comprises an endless conveyor element 18, a driveelement 20 and a gear wheel 22. The endless conveyor element 18 is arranged about and isengaged with the drive element 20 and the gear wheel 22. The endless conveyor element 18can be a chain or a belt and rotates about a first point P1 and an opposite second point P2.The drive element 20 is arranged at the first point P1 and the gear wheel 22 is arranged at the second point P2.
Said endless conveyor element 18 comprises a feeding portion 24 and a return portion 26. Thefeeding portion 24 is arranged to support products that are to be conveyed. The products can,for example, be boxes, bottles, cans, crates or trays. The return portion 26 of the endlessconveyor element 18 is arranged underneath the feeding portion 24 of the endless conveyorelement 18. The feeding portion 24 moves in a first direction D1 and the return portion 26moves in a second direction D2. The first direction D1 is opposite the second direction D2. Thefeeding portion 24 and the return portion 26 of the endless conveyor element 18 are arrangedin the same channel 28. Thus, the conveyor system 16 only comprises one channel 28. Said channel 28 and said endless conveyor element 18 have a substantially longitudinal extension.
The endless conveyor element 18 is in contact with the drive element 20, the gear wheel 22,and the channel 28, but for clarity purposes the endless conveyor element 18 in fig. 2 is spaced apart from the drive element 20, the gear wheel 22 and the channel 28. 7lt is possible for the conveyor system 16 to comprise several, for example two, endlessconveyor elements 18. ln that case, the endless conveyor elements 18 are arranged in parallel,are spaced apart in a direction perpendicular to the longitudinal extension by less than thewidth of the products to be carried and are driven in unison. lf the conveyor system 16 onlycomprises one endless conveyor element 18, a tray, for example, will ”balance” on the endlessconveyor element 18. Thereby, it is a higher risk that the tray will tip to one side of the tray. lfthat happens, it will be harder to feed the tray in the first direction D1. Thus, the conveyor system 16 preferably comprises at least two endless conveyor elements 18. lf the conveyor system 16 comprises, for example, two endless conveyor elements 18, a tray,for example, can be placed stably on both the endless conveyor elements 18. Thereby, the riskthat the tray will tip to one side of the tray is reduced and it is easier to feed the tray in thefirst direction D1. lf the products are wide or the conveyor system 16 is used for products ofvarying widths, the conveyor system 16 preferably comprises more than two endless conveyor elements 18 because it is desirable to support the products at more than two points.
The drive element 20 of the conveyor system 16 can be manually controlled. Preferably, theconveyor system 16 comprises a control unit 30, which is arranged for activation and deactivation ofthe drive element 20. A motor (not shown) drives the drive element 20.
Fig. 3 shows a perspective view ofthe channel 28 for accommodation of the endless conveyorelement 18 according to the present invention. Fig. 3 further illustrates a section between thelines A-B in fig. 2 and is fragmentary for clarity purposes. The channel 28 has a straightextension. lt is also possible for the channel 28 to have a curved extension or that one sectionof the channel 24 has a straight extension and that another section of the channel 28 has acurved extension (in for example a bend of the channel 28). The endless conveyor element 18is a chain comprising a plurality of links 23 being hinged to each other. However, as analternative, the endless conveyor element 18 could be a belt. Said channel 28 and said endlessconveyor element 18 have a substantially longitudinal extension. The endless conveyorelement 18 comprises a feeding portion 24 and a return portion 26. The return portion 26 ofthe endless conveyor element 18 is arranged underneath the feeding portion 24 of the endlessconveyor element 18. Thus, the return portion 26 and the feeding portion 24 are arranged in contact with each other and the return portion 26 and the channel 28 are arranged in contact 8with each other. The feeding portion 24 moves in a first direction D1 and the return portion 26 moves in a second direction D2. The first direction D1 is opposite to the second direction D2.
The channel 28 comprises opposite and substantially parallel delimiting means 32 and abottom surface 34 arranged between the delimiting means 32. Each delimiting means 32 is acontinuously arranged side wall ofthe channel 28. lt is also possible to use several projectingmeans, for example studs, arranged in parallel and projecting from the bottom surface 34 asdelimiting means. The height of the delimiting means 32 is in an interval between the heightof the return portion 26 of the endless conveyor element 18 and the total height of both thereturn portion 26 and the feeding portion 24 of the endless conveyor element 18. Thereby,the endless conveyor element 18 is prevented from moving in a direction perpendicular to thelongitudinal extension by the delimiting means 32 and the feeding portion 24 ofthe endlessconveyor element 18 reaches above the delimiting means 32 so that the feeding portion 24 can be in contact with the bottom of the conveyed product(s).
The endless conveyor element 18 comprises an outer surface 36. The outer surface 36 of thefeeding portion 24 (i.e. the outer surface 36 of each link 23 of the feeding portion 24) is, asmentioned above, arranged to support products that are to be conveyed and the outersurface 36 of the return portion 26 (i.e. the outer surface 36 of each link 23 of the returnportion 26) is arranged to slide on the bottom surface 34 of the channel 28. The crosssectional profile of the channel's 28 bottom surface 34 corresponds to the cross sectionalprofile of the outer surface 36 of the endless conveyor element 18. This will be described in more detail in figs. 4a-d.
A carrier 38 is arranged on the outer surface 36 ofthe endless conveyor element 18. But acarrier 38 does not need to be arranged on the outer 36 ofthe endless conveyor element 18.The carrier 38 protrudes from the outer surface 36 of the endless conveyor element 18. Thecarrier 38 has a cross sectional profile which is V-shaped. The carrier 38 could have anothercross sectional profile, for example a U-shaped cross sectional profile or a rectangular, elongated and tapered cross sectional profile.
When a tray, for example, is handled by the conveyor system 16, the tray will be placed uponthe carrier 38. Preferably, the carrier 38 comprises a high-friction material, such as rubber. The high-friction material reduces the risk that the tray will slip from the endless conveyor element 918 and thereby it is easier to move the tray in the first direction D1. ln one embodiment, thefirst direction D1 and the opposite second direction are essentially horizontal, but in otherembodiments with slightly or even substantially inclined directions, the mentioned carriers 38of high-friction material may be indispensable for the function of the conveyor system 16 and its comprised elements according to the invention. lt is also possible for the endless conveyor element 18 to comprise several carriers 38. Eachlink 23 or every second link 23 or every third link 23 or every fourth link 23 or every fifth link23 or every sixth link 23 or every seventh link 23 or every eighth link 23 or every ninth link 23or every tenth link 23 could, for example, comprise a carrier 38. lt is also possible for each link 23 to comprise several, for example two, carriers 38.
Each link 23 comprises a head portion 40 from which a pair of bifurcated legs 42 extends. Thepair of bifurcated legs 42 is arranged to receive and being coupled to the head portion 40 ofan adjacent link 23. The carrier 38 can be arranged on the head portion 40 and/or on the pair of bifurcated legs 42.
The carrier 38 of the endless conveyor element's 18 return portion 26 will be in contact withthe bottom surface 34 of the channel 28 and carry away dirt from the channel 28 when thereturn portion 26 is moving in the second direction D2. Thereby, the conveyor system 16 isself-cleaning. Even if the carrier 38 will not carry away all dirt from the channel 28, it will be less dirt in the channel 28 and thereby it will take less time to clean the channel 28.
The cross sectional profile of the channel's 28 bottom surface 34 corresponds to the crosssectional profile of the outer surface 36 of the endless conveyor element 18 and/or the crosssectional profile of the at least one carrier 38 arranged on the outer surface 36 of the endless conveyor element 18. This will be described in more detail in figs. 4a-d.
Fig. 3 also shows two plates 44 on each side of the delimiting means 32. As mentioned before,it is less expensive to manufacture one channel (by for example bending a metal sheet)instead of two channels (by for example manufacture a beam with one channel on its upper side and one channel on its lower side, which beam also has to be attached to the plates 44).
Figs. 4a-d show the cross sectional profile of the channel's 28 bottom surface 34. Fig. 4a is a cross sectional view of fig. 3, but does not show the carrier 38. lt is also possible for the channel's 28 bottom surface 34 to have other cross sections. This is shown in figs. 4b-d which is schematic figures and which do not show the endless conveyor element 18.
As shown in fig. 4a the cross sectional profile of the channel's 28 bottom surface 34 can besubstantially V-shaped. That is the case, when the carrier 38 is V-shaped. The cross sectionalprofile of the channel's 28 bottom surface 34 can also be substantially U-shaped, which isshown in fig. 4b. This is the case, when the carrier 38 is U-shaped. As shown in fig. 4c, thecross sectional profile of the channel's 28 bottom surface 34 can also be substantiallyrectangular, elongated and tapered. This is the case, when the carrier 38 is substantiallyrectangular, elongated and tapered. As shown in fig. 4d, the cross sectional profile of thechannel's 28 bottom surface 34 can have a substantially straight extension. This is the case,when the endless conveyor element 18 does not comprise any carrier 38. lt is also possible for the cross sectional profile of the channel's 28 bottom surface 34 to have other shapes.
The bottom surface 34 and the delimiting means 32 of the channel 28 preferably comprise awear resistant material to minimize the wear of the channel 28. The wear resistant materialcan comprise steel, for example stainless steel. Further, the bottom surface 34 and thedelimiting means 32 of the channel 28 preferably comprise a coating of a low friction material.
The low friction material can comprise HDPE.
The present invention is of course not in any way restricted to the preferred embodimentsdescribed above, but many possibilities to modifications, or combinations of the describedembodiments, thereof should be apparent to a person with ordinary skill in the art without departing from the basic idea ofthe invention as defined in the appended claims.
Claims (1)
1. 1 CLAll\/IS A channel (28) for accommodation of an endless conveyor element (18), wherein said channel (28) and said endless conveyor element (18) have a substantiallylongitudinal extension, said endless conveyor element (18) comprises a feeding portion (24) and a returnportion (26), wherein the return portion (26) of the endless conveyor element (18) isarranged underneath the feeding portion (24) of the endless conveyor element (18),the channel (28) comprises opposite and substantially parallel delimiting means (32)and a bottom surface (34) arranged between the delimiting means (32), characterized in that the height of the delimiting means (32) is in an interval between the height of thereturn portion (26) of the endless conveyor element (18) and the height of the returnportion (26) and the feeding portion (24) of the endless conveyor element (18), so thatthe endless conveyor element (18) is prevented from moving in a direction in ahorizontal plane, which direction is perpendicular to the longitudinal extension, by thedelimiting means (32) and so that the feeding portion (24) of the endless conveyor element (18) reaches above the delimiting means (32). The channel (28) according to claim 1, wherein the endless conveyor element (18) comprises an outer surface (36), wherein the outersurface (36) of the feeding portion (24) is arranged to support products that are to beconveyed and the outer surface (36) of the return portion (26) is arranged to slide onthe bottom surface (34) of the channel (28), and the cross sectional profile of the channel's (28) bottom surface (34) corresponds to thecross sectional profile of the outer surface (36) of the endless conveyor element (18)and/or to the cross sectional profile of at least one carrier (38) arranged on the outer surface (36) of the endless conveyor element (18). 10. 11. 12The channel (28) according to claim 2, whereinthe cross sectional profile of the channel's (28) bottom surface (34) is substantially straight. The channel (28) according to claim 2, whereinthe cross sectional profile of the channel's (28) bottom surface (34) is substantially V- shaped. The channel (28) according to claim 2, whereinthe cross sectional profile of the channel's (28) bottom surface (34) is substantially U- shaped. The channel (28) according to claim 2, whereinthe cross sectional profile of the channel's (28) bottom surface (34) has a substantially rectangular shape, preferably elongated and tapered. The channel (28) according to any ofthe above claims, whereinthe bottom surface (34) and the delimiting means (32) of the channel (28) comprises a wear resista nt material. The channel (28) according to claim 7, wherein the wear resistant material comprises steel. The channel (28) according to any of the above claims, whereinthe bottom surface (34) and the delimiting means (32) of the channel (28) comprises a coating of low friction material. The channel (28) according to claim 9, wherein the low friction material comprises HDPE. A conveyor system (16) comprising: an endless conveyor element (18), a drive element (20), a gear wheel (22), wherein the endless conveyor element (18) is arranged about the drive element (20) and the gear wheel (22) and rotates about a first point (P1) and an opposite second 5 13point (P2), and wherein the drive element (20) is arranged at the first point (P1) andthe gear wheel (22) is arranged at the second point (P2), characterized in that the conveyor system further comprises a channel (28) according to any of claims 1-10. 12. The conveyor system (16) according to c|aim 11, whereinthe conveyor system (16) comprises a control unit (30), which control unit (30) is arranged for activation and deactivation of the drive element (20).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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SE1551322A SE540797C2 (en) | 2015-10-13 | 2015-10-13 | A conveyor system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SE1551322A SE540797C2 (en) | 2015-10-13 | 2015-10-13 | A conveyor system |
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SE1551322A1 true SE1551322A1 (en) | 2017-04-14 |
SE540797C2 SE540797C2 (en) | 2018-11-13 |
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SE1551322A SE540797C2 (en) | 2015-10-13 | 2015-10-13 | A conveyor system |
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