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Publication numberUS3739790 A
Publication typeGrant
Publication dateJun 19, 1973
Filing dateJan 4, 1972
Priority dateJan 4, 1972
Publication numberUS 3739790 A, US 3739790A, US-A-3739790, US3739790 A, US3739790A
InventorsAdutskevich E, Gudz N
Original AssigneeAdutskevich E, Gudz N
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for washing containers
US 3739790 A
Abstract
The internal space of the apparatus is divided by means of a vertical partition wall into two longitudinally extending portions. These portions are divided by means of trays into stages which constitute treatment stations. A conveyor closed in space extends through all treatment stations and comprises a guide, carriages and driving mechanism. Said driving mechanism and the guide, along which the carriages with carriers for containers are moved, extend through all the treatment stations moving around the vertical partition wall in a horizontal plane and passing vertically from one stage into another.
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United States Patent [1 1 Gudz et a1.

[ APPARATUS FOR WASHING CONTAINERS [76] Inventors: Nikolai Martynovich Gudz, Ulitsa Srendyaya, 6; Eduard Kazimirovich Adutskevich, Bulvor Rokossorskogo 97, both of Minsk, USSR.

22 Filed: Jan. 4, 1972 21 Appl. No.: 215,349

[51] Int. Cl B08b 3/02, 80% 9/08 [58] Field of Search 134/60, 68, 70, 72,

[56] References Cited UNITED STATES PATENTS 2,196,131 4/1940 Todd 134/70 2,273,939 2/1942 Dammers 134/60 X 2,395,397 2/1946 Croft 134/60 X 2,943,424 7/1960 Sadwith 134/72 June 19, 1973 2,966,914 l/1961 Sadwith 134/68 3,056,414 10/1962 Nolte 134/60 3,583,544 6/1971 Primary Examiner--Robert L. Bleutge Attorney-Eric H. Waters, John G. Schwartz and .1. Harold Nissen ABSTRACT The internal space of the apparatus is divided by means of a vertical partition wall into two longitudinally extending portions. These portions are divided by means of trays into stages which constitute treatment stations. A conveyor closed in space extends through all treatment stations and comprises a guide, carriages and driving mechanism. Said driving mechanism and the guide, along which the carriages with carriers for containers are moved, extend through all the treatment stations moving around the vertical partition wall in a horizontal plane and passing vertically from one stage into another.

9 Claims, 10 Drawing Figures Prodzenski 134/68 X Patented June 19, 1913 3339 790 8 Shasta-Sheet a FIE. 2

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Patonted June 19, 1973 8 Sheets-Sheet 6 Pnhnbd June 19, 1973 8 Shula-Sheet 7 Emma June 19', 1913 8 Sheets-Sheet a The present invention relates to apparatus for washing containers, such as trays, boxes, dip pans and the like, to be used in meat, food and fish industry, in trade and public catering, as well as in other fields of industry, where metallic, wooden and plastic containers are to be reused.

Known in the prior art are apparatus SB manufactured by a Swedish company F redriksons Verkstads AB Vadstena, comprising baths for a detergent liquid and circulating water accommodated in a housing, a pump system for the detergent liquid and circulating water, a driven conveyor having carriers for containers, which is adapted to transfer containers through various treatment stations, one group of said stations comprising injector means associated with the pump systems, and the other group accommodating air supply means.

The conveyor adapted to transfer the containers is made as a chain conveyor which is closed in a vertical plane, the upper run of said conveyor being the working one.

The length of such prior-art apparatus is 12 m. This apparatus, however, does not provide for the performance of a number of technological steps required for treating the containers: thus, containers cannot be treated with disinfectants and there is no additional rinsing of containers with fresh water, since provision for such operations would further increase the overall dimensions of the apparatus.

The use of conveyors having one working run and one idle run in such apparatus results in the fact that optimum conditions for thorough washing of containers can be achieved only when 12 to 20 m long conveyors are used, which 'is unacceptable for enterprises, where sufficiently large working areas are not available.

Furthermore, such conveyors are combersome and require support frames resulting in increased dimensions and weight of the apparatus.

Since all treatment stations are arranged in one line, partition walls mounted between the treatment stations do not prevent detergent solutions from being mixed, resulting in disturbance of the technological conditions and in impairing of quality of washing; furthermore, there is no provision in these apparatus for full utilization of hot water used for rinsing the containers, which results in an increased water and power consumption.

It is an object of the invention to provide an apparatus for washing containers which has small overall dimensions and performs the whole technological com-' plex of operations of hygienic treatment of containers.

Another object of the invention is to provide an apparatus for washing containers which ensures the treatment of containers with difl'erent degree of fouling and having various shapes and sizes.

With these and other objects in view, the apparatus for washing containers according to the invention comprises baths for a detergent liquid and circulating water accommodated in a housing, pump systems to supply the detergent liquid and circulating water, a driven conveyor having carriers for containers, which is adapted to transfer the containers through treatment stations, one group of said stations comprising injector means associated with the pump systems, and other group accommodating air supply means, wherein, according to the invention, mounted within the housing is a vertical partition wall which divides the housing space into two longitudinally extending portions, each portion being divided into stages by trays, the lower trays accommodating baths for the detergent liquid and for circulating water, as well as the pump systems, while the upper trays constitute treatment stations, the conveyor, which is adapted to transfer containers, comprising a conveyor closed in space which is provided with a guide, driving means and carriages which support carriers for containers and are movable along the guide by means of said driving means, the guide and said driving means being arranged in such a manner that they pass through all the treatment stations moving around the vertical partition wall and vertically from one stage into another.

Therefore, the division of the apparatus into stages in which treatment stations are arranged provides conditions for complete utilization of the whole space of the apparatus. This permits to perform the whole complex of technological operations of the containers treatment and substantially reduces the length of the apparatus. Furthermore, the division of the internal space of the apparatus into stages makes is possible to ensure complete separation of all the treatment stations.

The use of the conveyor which is closed in space permits the transfer of containers through all the treatment stations without any additional means for transferring the containers from one treatment station to another.

It is advantageous that each conveyor carriage comprise a bracket and four pulleys having elongated hubs, the axes of said pulleys being journalled in the bracket, three pulleys, each having one collar rim and being arranged in one line, while the fourth pulley has two collar rims and is spaced from the line of the three pulleys at a distance which is equal to the height of the guide, the intermediate pulley of said three pulleys having a hub diameter smaller than the corresponding diameters of the hubs of the two extreme pulleys, and mounted in such a manner that its collar rim runs along the inner side of the guide, while the collar rims of the two extreme pulleys run along the outer side of the guide.

This embodiment of the carriage enables free move ment thereof along the guide having any radius of curvature in both horizontal and vertical planes.

It is desirable that the collar rims running along the inner side of the guide taper towards their external edge, thereby preventing the carriage from being blocked while moving along arcuated portions of the guide.

It is advantageous that the carriage which receives the motion from driving means be connected to the latter by means of a driving arm, while the carrier for containers is advantageously connected to the carriage by means of a pin extending through a hole in the driving arm and attached to the carriage bracket.

It is advantageous that the carrier for containers comprise a cantilever cage, comprising an arm hingedly mounted on the carriage pin, and a horizontal fork mounted on said arm which is adapted to accommo date containers, the branches of said fork supporting vertical rods and support rollers, while a guide roller is mounted on said arm at the end thereof opposite to the fork.

Therefore, this embodiment of the carrier for containers makes it possible to accommodate containers of any size thereon and to transfer them in a horizontal plane through all the treatment stations.

In order to maintain the cage in a horizontal position during the transition of the carriages from horizontal portions of the conveyor into vertical ones, it is advantageous to provide at the points of the vertical transition of the carriages from one stage into another means for rotation of the cages in a horizontal plane, each comprising a vertical plate attached to the vertical partition wall so that the lower edge of the plate extends below the level of the support rollers of the cage in its lowermost position, while the upper edge provided with a horizontal guide member extends above the level of the support rollers of the cage in its uppermost position, the plate being cut by a vertical slot extended in its lower part by two horizontal slots extending at the levels of the carriage pin and the support roller of the cage in its lowermost position respectively.

In order to unload the conveyor carriages and prolong the service life of the rollers, it is advantageous to provide at the treatment stations additional guides made of an antifriction material and adapted to support the cages during their movement in a horizontal plane.

In order to provide for the utilization of hot water, it is advantageous that one of the trays have a socket pipe connected by means of a conduit to the bath for circulating water which is disposed in the immediate vicinity of the other bath for circulating water to enable the overflowing of water from the first bath into the second one.

In order to ensure automatic removal of containers from the cages after the treatment, it is advantageous to provide container removal means at the point of transition of the carriages with carriers for containers from the upper stage into the lower stage, said means comprising a horizontal axis journalled in mounting brackets, and telescopic rods mounted on said axis and movable therealong, said rods being spaced from one another to pass the fork therebetween.

Therefore, the apparatus for washing containers according to the invention which has a plurality of stages with treatment stations through which the conveyor closed in space is driven permits complete utilization of the whole space of the apparatus, since the conveyor adapted to transfer containers does not have an idle run, thereby resulting in a reduction of the overall dimensions and weight of the apparatus. In this embodiment it is possible to use cantilever cages as carriers for containers, said cages enabling accommodation of containers having any shape and size and their transfer through all the treatment stations without handling.

The invention will now be described with reference to the specific embodiment of the apparatus for washing containers and to the accompanying drawings, in which:

FIG. 1 shows a general view of the apparatus according to the invention with the side wall of the housing being removed;

FIG. 2 is a cross section of the apparatus;

FIG. 3 is a flow diagram of the apparatus;

FIG. 4 is a conveyor of the apparatus, closed in space;

FIG. 5 is a cross section of the conveyor carriage;

FIG. 6 is a plan view of the carriage partly in section;

FIG. 7 is the conveyor carriage, elevation view;

FIG. 8 is a tensioning station of the conveyor;

FIG. 9 is a section along the line IX-IX in FIG. 8; and

FIG. 10 is a general view of the apparatus.

The apparatus for washing containers comprises a housing 1 (FIG. 1), which has the internal space divided by means of a vertical partition wall 2 into two longitudinally extending portions A and B (FIG. 2). Each longitudinally extending portion is divided by means of trays 3 into stages 4, 5, 6, 7, 8, 9. The upper stages 6, 7, 8 and 9 constitute treatment stations; thus, soaking off of the containers is performed in the stage 6, the stage 7 is provided for treatment of the containers with a detergent solution, in the stage 8 the treatment of the containers with circulating water and rinsing thereof with fresh hot water take place, while in the stage 9 the treatment of the containers with steam, heated air and disinfectants is effected.

Appropriate injector means 10, 11 and 12 are installed in the stages 6, 7 and 8 (FIG. 3), while in the stage 9 there are provided nozzles 13 for steam supply, nozzles 14 for hot air supply and means for disinfection of containers, such as electric radiant lamps 15. Said means may also comprise chemical means and steam, the use of each of these means depending on the type of a material of which containers are made and on the degree of bacteriological contamination of the containers.

A closed in space conveyor 16 extends through all the treatment stations arranged in the stages 6, 7, 8 and 9 (FIG. 4) which transfers the containers through all of said treatment stations by means of carriers 17.

The lower stages 4 and 5 accommodate (FIG. 2) a frame 18 mounted on screw supports 19 and supporting an electric drive 20 (FIG. 1) of the conveyor 16, a pump unit for secondary circulation water, a pump unit 22 for circulation water, pump units 23 and 24 for a detergent liquid, a bath 25 (FIG. 3) for secondary circulation water, a bath 26 for circulation water and a bath 27 for a detergent liquid.

Pump units 21, 22, 23 and 24 are connected by means of conduits 28 to the injector means 10, 11 and 12 respectively.

The conveyor 16 (FIG. 4) comprises driving means 29 made as a round-linked chain with four degrees of freedom or a cable, carriages 30 supporting carriers 17 for containers and a guide 31 along which the carriages 30 are moved. The round-linked driving chain 29 (FIG. 2) and the guide 31 are arranged in such a manner that they pass through all the treatment stations accommodated in the stages 6, 7, 8 and 9 moving around the vertical partition wall 2 in a horizontal plane and passing from the stage 6 into the stage 7, and from the latter vertically into the stage 8, from the stage 8 into the stage 9 and from the latter vertically into the stage 6. Thus, the conveyor 16 (FIG. 4) has two horizontal runs 32 and 33 disposed one above the other, each extending through the two adjacent stages 6, 7 and 8, 9, and two vertical portions 32a and 33a.

The driving chain 29 is moved by the electric drive 20 through a vertically extending shaft 34 driven by a pair of bevel gears 35. A driving sprocket 36 is rigidly fixed to the shaft 34, said sprocket constantly engaging the chain 29, and a drum 37 having a guide collar rim 38 disposed at a level of the carrier 17 for containers is also rigidly fixed on the shaft.

The sprocket 36 imparts the motion to the chain 29 in a horizontal plane, which moves around the vertical partition wall 2, the run 32 of the conveyor moving around a sprocket 36, while the run 33 is moving around a pulley 39 mounted on the shaft of the driving station. The direction of movement of the chain 29 is indicated by arrows C.

In order to enable the transition of the chain 29 vertically from one stage into another, mounted on the vertical partition wall 2 are driven pulleys 40, 41, 42 and 43 adapted to guide the chain passing from the horizontal portions 32 and 33 into vertical portions 32a, 33a. These pulleys are disposed in a vertical plane which is parallel to the partition wall 2.

The guide 31 (FIG. 5) is fixed to the partition wall 2 by means of brackets 44.

The carriage 30 (FIG. 4) of the conveyor 16 comprises a bracket 45 and four pulleys 46, 47, 48 and 49 having elongated hubs 50 (FIG. 6). The axes of these pulleys are journalled in the bracket 45. The pulleys 46, 47 and 48 have one collar rim to run along arcuated portions of the guide 31 and are arranged in one line (FIG. 7) to run along one side of the guide 31, while the pulley 49 (FIG. 5) has two collar rims and is spaced from the line of the pulleys 46, 47 and 48 at a distance which is equal to a height of the guide 31 to run along the other side of the guide 31. A diameter of the hub 50 of the pulley 47 is smaller than that of the hubs of the pulleys 46 and 48 so that during the movement the carriage 30 is supported on the guide 31 only by the two extreme pulleys 46 and 48. In this case the collar rim 50 of the pulley 47 will run along the inner side of the guide 31, while the collar rims 52 of the pulleys 46 and 48 will run along the outer side of the guide.

The collar rim 51 of the pulley 47 (FIG. 5) and the collar rim 53 of the pulley 49 are tapered towards the external edge thereof, thereby enabling free running of the carriage 50 along arcuated portions of the guide 31.

The axis of the pulley 49 is loaded by a spring 54 mounted on a thrust screw 55, thereby providing constant urging of the pulley 49 against the guide 31.

The carriage 30 is connected to the driving chain 29 by means of a driving arm 56 having a hole 57, a pin 58, which is rigidly fixed to the bracket 45 of the carriage 30, extending through said hole.

The carrier 17 for containers is hingedly mounted on the free end of the pin 58, said carrier comprising a cantilever cage, including an arm 59 (FIG. 4) hingedly mounted on the pin 58 of the carriage 30 and a horizontal fork 60 mounted on the arm 59 and adapted to accommodate containers. The branches of the fork 60 support rods 61 adapted to maintain side walls of containers and support rollers 62 which constitute additional support during the movement of the carriage 30 along the vertical portions 32a and 33a from one stage into another. A guide roller 63 is mounted on the arm 59 at the end thereof opposite to the fork 60, said roller maintaining the fork 60 with containers disposed thereon in a horizontal plane during the vertical movement of the carriage from one stage into another.

Additional guides 64 closed in a horizontal plane are arranged in the treatment stations on the stages 6, 7 and 8, 9, said guides being made of an antifriction material and constituting a support for the cages during their movement.

At the points of the transition of the carriages with the cages from the horizontal portions 32 and 33 of the conveyor into the vertical portions 32a, 33a there are provided means for rotation of the carriages 30 and maintenance of the fork 60 in a horizontal plane. Each of said means comprises a vertical plate 65 attached to the partition wall 2 in such a manner that the lower edge thereof 66 extends below the level of the support rollers 62 of the cage in its lowermost position, while the upper edge 67 is provided with a horizontal guide member 68 comprising an angle bar which extends above the level of the cage support rollers 62 in the up permost position of the cage. The plate (FIG. 1) is cut by a vertical slot 69 which is extended in the lower part thereof by two horizontal slots 70 and 71, one of which, 71, extends at a level of the pin 58 of the carriage 30, while the other slot 71 extends at a level of the guide rollers 63 of the cage in its lowermost position.

The slots 69, 70 and 71 constitute guides for the roller 63 and the pin 58 and follow their path of movement in a vertical plane. The plate 65 support the rollers 62 during the vertical movement of the cage from one stage into another.

At the point of the transition of the conveyor 16 from the stage 9 into the stage 6 there is provided container removal means, comprising a horizontal shaft 73 journalled in mounting brackets 74 and telescopic rods 75 displaceable along the shaft 73 and spaced at a distance D from each other to pass the fork therebetween. Telescopic construction of the rods 75 enables variations of the length thereof, while the displacement of the rods along the shaft permits to change their mutual arrangement in order to provide for effective removal of containers of any size. The rotation of the shaft 73 is effected manually, while its maintenance in a predetermined position is provided by means of collars 76 braced by means of screws 77 and prevented from rotation by means of a spring 78 and a lever 79. A limiting switch 80 is mounted adjacent the lever 79, said switch being connected to the electric drive 20 to deenergize the latter upon substantial deviation of the lever 79 from its normal position. This may take place when containers are backlogged on the rods 75.

In order to ensure normal operation of the conveyor 16 and automatic tensioning of the chain 29, as well as to compensate for loosening of the chain tension due to an extension thereof, the apparatus is provided with a tensioning station comprising a shaft 81 (FIG. 8), the pulley 39, a rotatable drum 82 and two guide members 83 and 84 (FIG. 9), as well as two spring loaded screw tensioning couples (FIG. 8) fixed to said shaft. The tensioning station is attached to the partition wall 2 (FIG. 9) by means of the guide member 83.

In order to provide for utilization of hot water used for rinsing, the tray 3 (FIG. 3) of the stage 8 is provided with a socket pipe 86 connected to the bath 26 for circulating water, the bath 26 being arranged in close vicinity of the bath 25 for second circulation water to enable the overflowing of water from the bath 26 into the bath 25. In this embodiment water is gradually removed from the bath 25 in an amount corresponding to the amount of water inflowing from the bath 26.

The housing 1 of the apparatus (FIG. 10) in places, where the treatment stations are arranged, is made with its walls inclined to the internal space and is further provided with inspection windows 87 closed by means of covers 88 made of a transparent material. At the point, where container removal means 72 is arranged, the housing 1 is provided with a rotatable flap 89 adapted to close the loading window. Upon rotation of the flap 89 it may be used as working table for temporary accommodation of containers thereon.

The apparatus for washing containers operates as follows.

Prior to the beginning of the operation the bath 27 for a detergent liquid (FIG. 3), the bath 27 for circulating water, the bath 25 for second circulation water are filled up with hot water. A detergent is poured into a tank 90 for a concentrated liquid which is disposed in the stage 4 for automatic metered supply of the bath 27 with a detergent. In addition, prior to the filling up of the bath 27 with water a detergent having necessary concentration is added into the bath. Then heating means 91 are energized (a temperature and a predetermined level of liquids in the baths are automatically maintained by known methods). Upon the achievement of a predetermined temperature of liquids in the baths 25, 26, 27, a throttle valve is open, and a predetermined batch of a detergent from the tank 90 is automatically supplied into the bath 27. The pump units 23 and 24 for a detergent liquid are energized together with the pump unit 21 for second circulation water and the pump unit 22 for circulating water, and a valve for fresh hot water supply to injector means 12 is also open. Then a valve 92 for steam supply through the nozzles 13 is actuated, and fans are energized to supply hot air through the nozzles 14 to blow droplet moisture off containers. The air is heated by means of an air heater.

Further the electric drive 20 (FIG. 4) is energized, which rotates via bevel gears 35 the shaft 34 with the driving sprocket 36 to transmit moving force to the driving chain 29. The latter moves the carriage 30 along the guide 31 by means of the driving arm 56 (FIG.

Containers are laid on the rods 61 of the fork 60 with their bottom upside down as the forks are moving to the loading window.

The containers accommodated on the forks 60 are supplied into the treatment station for soaking off of containers arranged in the stage 6 (FIG. 3), wherein containers are soaked off with warm second circulation water supplied through injector means and collected on the tray 3, wherefrom this water is returned into the bath 25 through the conduit 28. At the output of the stage 6 the carriages 30 (FIG. 4) supporting the cages with containers are turned around along the guide 31 in horizontal plane and pass into the stage 7 (FIG. 2) into the station of containers treatment with a detergent liquid supplied through injector means 11 (FIG. 3). During the rotation in horizontal plane the forks 60 (FIG. 4) are supported by means of the rollers 62 on the collar rim 38 of the drum 37, thereby substantially reducing the friction between the fork 60 and the guide member 64.

The stage 7 (FIG. 3) accommodates injector means 11 of the two pump units 33 and 24, the simultaneous use of these two pump units being necessary where heavily contaminated containers are treated in the apparatus.

Upon treatment of containers a detergent liquid from the tray 3 is returned into the bath 27 through filters. The tank 90 ensures continuous metered supply of the bath 27 with a concentrated detergent. Upon treatment containers are moved along the vertical portion 32a of the conveyor 16 (FIG. 4) and enter the stage 8 (FIG. 8). During the transition from the horizontal run 32 of the conveyor 16 (FIG. 4) into the vertical portion 32a the pin 58 of the carriage 30 is engaged into the slot 70 of the plate 65, while the guide roller 63 of the fork 60 enters into the slot 71. The carriage 30 is rotated at 180 at the moment of the transition from the horizontal portion to the vertical one, while the cage with the fork 60 supporting containers is maintained in a horizontal plane due to the fact that the pin 58 of the carriage 30 and the guide roller 63 are engaging into the vertical slot 69 of the plate 65, while the support rollers 62 are running along the surface of this plate.

During the transition from the vertical portion 32a into the horizontal portion 33 of the conveyor 16 the cage with the fork 60 supporting containers is also maintained in a horizontal plane due to the fact that the support rollers are running along the horizontal guide member 68 attached to the plate 65.

In the stage 8 (FIG. 3) containers are treated with circulating water and are rinsed with fresh hot water to wash off the remaining detergent liquid from containers by injector means and to effect final rinsing of containers with fresh water, the consumption of fresh water being small, since all pump units operate according to circulation pattern. Since fresh water is supplied into the apparatus for rinsing containers, this water, to gether with circulating water from injector means 12, is returned into the bath 26 from the tray 3 through the socket pipe 86.

With reference to the flow diagram shown in FIG. 3, it will be apparent that water from the bath 26 is supplied through the pump unit 22 for rinsing containers through injector means 12, and this water is returned into the bath 26, but in larger volume increased by that amount of fresh water which was used for final rinsing of containers.

Due to continuous supply of fresh water into the bath 26 there are provided conditions for recovery of contaminated water in this bath.

A part of water from the bath 26 which is equal to an amount of water supplied for rinsing flows into the bath 25 for second circulation water. Therefore, also in the bath 25 there are provided conditions for recovery of contaminated water used for soaking off, that is water utilization is achieved.

At the output of the stage 8 the cages supporting containers are turned in a horizontal plane around the partition wall 2 and are directed towards the stage 9, where containers are treated with steam supplied through the nozzles 13, hot air supplied through the nozzles 14 and by means of electric radiant lamps 15.

Upon this treatment the cages supporting containers are moved from the horizontal portion 33 (FIG. 4) into the vertical portion 33a towards the stage 6.

During the transition form the horizontal portion of the conveyor into the vertical one the support rollers 62 of the cage are running along the guide member 68 of the plate 65, while the guide roller 63 and the pin 58 are moving along the vertical slot 69 thereby maintaining the fork supporting containers in a horizontal plane preventing them from being oscillated and rotated.

During the lowering of the cage the branches of the fork 60 pass freely between the rods of container removal means 72 thus abandoning containers on these rods 75. Containers slide down along the rods 75 on the receiving table or onto any other means for storing and transporting clean containers.

Therefore, the apparatus according to the invention performs the whole technological complex of operations of treatment of containers while having small dimenslons.

We claim:

1. An apparatus for washing containers, comprising: a housing; a vertical partition wall arranged within said housing to divide the internal space of the housing into two longitudinally extending portions; trays arranged along the height of each of said portions to divide them into stages; the upper of said stages constituting treatment stations; baths for a detergent liquid accommodated in one of the lower stages; baths for circulating water accommodated in said lower stage; pump systems to supply a detergent liquid from said baths for a detergent liquid and for circulating water accommodated in another of said lower stages; injector means to supply a detergent liquid accommodated in one of said upper stages and connected by means of conduits to said pump system for a detergent liquid supply; injector means to supply circulating water accommodated in another of said upper stages and connected to said pump system for circulating water supply; injector means to supply hot water connected to a pump for hot water supply and accommodated in the third of said upper stages; air supply means accommodated in the ultimate of said upper stages; a conveyor closed in space and adapted to transfer containers through all said treatment stations accommodated in said upper stages; said conveyor comprising driving means, carriages to support carriers for containers, and a guide along which said carriages are moved; said guide and said driving means of said conveyor extending through all said treatment stations moving around said partition wall in a horizontal plane and vertically from one of said stages into another.

2. An apparatus according to claim 1, wherein said carriage comprises a bracket and four pulleys having elongated hubs, the axes of said pulleys being journaled in the bracket, the three of said pulleys each having one collar rim and being arranged in one line, while the fourth pulley having two collar rims and being spaced from the line of the three pulleys at a distance which is equal to a height of the guide, the intermediate pulley of the three pulleys having a hub diameter which is smaller than that of the hubs of the two extreme pulleys and being arranged in such a manner that the collar rim thereof runs along the inner side of the guide, while the collar rims of the two extreme pulleys are running along the outer side of the guide.

3. An apparatus according to claim 2, wherein the collar rims running along the inner side of the guide are tapered towards their external edge.

4. An apparatus according to claim 2, wherein the carriage which receives the motion from said driving means is connected thereto by means of a driving arm and to the carrier for containers by means of a pin extending through a hole in the driving arm, and fixed to the carriage bracket.

5. An apparatus according to claim 4, wherein said carrier for containers comprises a cantilever cage comprising an arm hingedly mounted on the carriage pin and a horizontal fork mounted on said arm and adapted to accommodate containers, the branches of said fork supporting vertical rods and support rollers, while a guide roller is mounted on said arm at the end thereof opposite to the fork.

6. An apparatus according to claim 5, wherein at places of the vertical transition of said carriages from one stage into another there are provided means for maintaining cages in a horizontal plane, each of said means comprising a vertical plate attached to the vertical partition wall so that the lower edge of the plate extends below the level of the support rollers of the cage in its lowermost position, while the upper edge provided with a horizontal guide member extends above the level of the support rollers of the cage in its upper most position, said plate being cut by a vertical slot extended in its lower part by two horizontal slots extending at levels of the carriage pin and support roller of the cage in its lowermost position respectively.

7. An apparatus according to claim 5, wherein the treatment stations are provided with additional guides made of an antifriction material and adapted to support the cages during their movement in a horizontal plane.

8. An apparatus according to claim 1, wherein one of the trays is provided with a socket pipe connected via a conduit to the bath for circulating water, said bath being arranged in immediate vicinity of the other bath for circulating water to enable the overflowing of water from the first bath into the second one.

9. An apparatus according to claim 1, wherein at the point of the transition of the carriages with carriers for containers from an upper stage into a lower one there is provided container removal means comprising a horizontal shaft journalled in mounting brackets and telescopic rods mounted on said shaft and movable therealong, said rods being spaced from one another to pass the fork therebetween.

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7938913Jul 27, 2006May 10, 2011Premark Feg L.L.C.Conveyor dishwasher and operating method for same
US8092614May 31, 2005Jan 10, 2012Premark Feg L.L.C.Conveyor dishwasher comprising a plurality of final-rinse liquid spray jets and method of use thereof
DE102004030014A1 *Jun 22, 2004Jan 12, 2006Premark Feg L.L.C., WilmingtonSpülmaschinen-Betriebsverfahren und Transportspülmaschine
Classifications
U.S. Classification134/60, 134/79, 134/70, 134/68
International ClassificationA47L15/00, A47L15/24
Cooperative ClassificationA47L15/242
European ClassificationA47L15/24B2