GB1562266A - Apparatus for washing buoyant material - Google Patents
Apparatus for washing buoyant material Download PDFInfo
- Publication number
- GB1562266A GB1562266A GB4732877A GB4732877A GB1562266A GB 1562266 A GB1562266 A GB 1562266A GB 4732877 A GB4732877 A GB 4732877A GB 4732877 A GB4732877 A GB 4732877A GB 1562266 A GB1562266 A GB 1562266A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grille
- tank
- water
- cress
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims description 30
- 238000005406 washing Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 244000211187 Lepidium sativum Species 0.000 claims description 55
- 235000007849 Lepidium sativum Nutrition 0.000 claims description 46
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 240000005407 Nasturtium officinale Species 0.000 claims description 14
- 235000017879 Nasturtium officinale Nutrition 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 241000238631 Hexapoda Species 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 235000013311 vegetables Nutrition 0.000 claims description 3
- 208000034656 Contusions Diseases 0.000 claims description 2
- 241000237858 Gastropoda Species 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
- B65G49/02—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid
- B65G49/04—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction
- B65G49/0409—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction specially adapted for workpieces of definite length
- B65G49/0413—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction specially adapted for workpieces of definite length arrangements for conveyance through the bath
- B65G49/0431—Conveying systems characterised by their application for specified purposes not otherwise provided for for conveying workpieces through baths of liquid the workpieces being immersed and withdrawn by movement in a vertical direction specially adapted for workpieces of definite length arrangements for conveyance through the bath reciprocating conveying means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
- B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
- B03B5/12—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs using pulses generated mechanically in fluid
- B03B5/18—Moving-sieve jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
- B03B5/40—Devices therefor, other than using centrifugal force of trough type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
(54) APPARATUS FOR WASHING BUOYANT MATERIAL
(71) We, HAMPSHIRE WATERCRESS
LIMITED, a British Company of Fobdown,
Alresford, Hampshire, do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed to be particularly described in and by the following statement: The invention relates to apparatus for washing buoyant material and is particularly although not exclusively applicable to apparatus for washing watercress.
Traditionally watercress has been harvested by hand, washed by hand, formed into bunches and sold in punnets, more recently in vacuum formed trays of plastics material encapsulated in a porous transparent plastics wrapper. Harvestingand washing by hand involve very high labour costs.
According to one aspect of the invention apparatus for washing buoyant material comprises a tank to contain water, a grille extending generally horizontally within the tank and mounted for movement in a circular path while retaining a generally horizontal orientation beneath the level of the surface of the water in the tank, the grille being so arranged in the tank that buoyant material fed to a position beneath the grille at an inlet end of the tank, the inlet end of the tank being that end of the tank away from which the grille moves as it passes through a bottom dead centre position in its circular path, is, by each complete circular movement of the grille, pressed downwardly in the water by the grille and thereafter allowed to float upwardly again and is thereby conveyed beneath the grille along the tank from the inlet end to an outlet end.
Preferably the apparatus includes water inlets to cause a surface current of the water towards an overflow located intermediate the inlet end and the outlet end. Advantageously, the grille has an upwardly sloping portion at the inlet end to assist feeding of the buoyant material to a position beneath the grille and at the outlet end has a substantially vertical portion which with the outlet end wall of the- tank defines a space in which buoyant material, which has passed beneath the grille to the outlet end of the tank, can float up to the surface of the water and from which space it can be removed from the tank. Preferably a conveyor is provided at one side of said space to remove the buoyant material from said space and water flow means are provided at the other side of said space to urge the buoyant material in said space towards said conveyor.
The tank, when the buoyant material is watercress, is advantageously in the region of 22' long 3'6" wide and 2'6" deep and is formed of stainless steel. The grille is preferably a framework of stainless steel bars with a stainless steel mesh therethrough, the stainless steel mesh having i" square apertures.
Advantageously the grille is mounted on cranks and the cranks are motor driven at a speed of between 10 and 30- r.p.m., preferably between 15 and 25 r.p.m. The cranks are advantageously in the region of 4t" in length and the submersion of the grille in the water varies, during its movemnt in
the circular path, between 3" and 12".
Flexible means for example bristles, are preferably provided between the side edges of the grille and the side walls of the tank to prevent the buoyant material from passing therebetween.
The apparatus relies for its function upon the natural buoyancy of the cress and the throw of the cranks and the speed of rotation thereof is chosen so that the grille during the upward movement of its circular path rises more rapidly than the rate at which the cress rises due to its buoyancy.
Thus, during its downward movement, the grille presses the cress downwardly in the water thereby to wash therefrom airborne insects and loose vegetable matter, but, upon rising, the grille separates from the cress, passes through its top dead centre position and again comes into engagement with the cress upon downward movement of the grille, but with the cress moved towards the outlet end of the tank compared with the position of previous engagement of the grille with the cress. In the tank of the size mentioned above and operating in the speed range mentioned above, the cress will be pressed downwardly by the grille in the region of 80 times during passage of the cress from the inlet end to the outlet end of the tank and thus will be thoroughly washed.Heavy waste matter such as water insects and grit will fall downwardly to lie on the bottom of the tank and thus the cress reaching the space at the outlet end of the tank will be completely washed and in a ready-to-eat condition.
According to another aspect of the invention a method of processing watercress comprises tipping into an inlet end of a tank, only the tops of watercress plants cut by a mowing machine having a pair of co-operating reciprocating cutters and an air suction arrangement to carry away from the cutters the cress plant tops cut by the cutters, the tank containing water and having a grille extending generally horizontally within the tank, the grille being mounted on cranks, rotating the cranks by motor such that the grille moves in a circular path while retaining a generally horizontal orientation beneath the level of the surface of the water in the tank whereby the cress plant tops are washed by being repeatedly pressed downwardly in the water by the grille and thereafter allowed to float upwardly again and are thereby conveyed beneath the grille along the tank to an outlet end, removing the cress plant tops from the tank and loosely piling them into bags of a breathing plastics material.
Advantageously the method includes directing water sprays onto the surface of the water in the tank to cause a surface current of the water towards an overflow located intermedtate the inlet and the outlet end, the surface water flow from the overflow being in the region of 1,500 gallons an hour.
Such a method has considerable advantages over the traditional method of processing watercress. Firstly a larger crop can be obtained from a given area of cress bed since the plants from which the tops have been removed quickly grow new tops, the labour-intensive hand harvesting of bunches of cress is eliminated, hand bunching, hand washing and trimming of the bunches is avoided, there is no requirement for trays and packaging of "jumble packed cress plant tops " in cartons for transport is much simpler than packaging of wrapped trays of bunches of cress. There is also the advantage for the consumer that the entire contents of a bag of jumble packed cress plant tops is edible whereas usually only the leaves and upper portions of a bunch of cress is eaten, thick portions of the stalks being wasted.
The invention is diagrammatically illustrated by way of example, in the accompanying drawings, in which: Figure 1 is a plan view of apparatus for washing buoyant material according to the invention;
Figure 2 is a sectional elevation taken on line II-II of Figure 1;
Figure 3 is an end view taken in the direction of arrow III of Figure 1;
Figure 4 is a fragmentary sectional view taken on line IV-IV of Figure 1; and
Figure 5 is a fragmentary sectional view taken on line V-V of Figure 1.
Referring to the drawings, apparatus for washing buoyant material comprises a
stainless steel tank 1 approximately 22' long, 3'6" wide and 2'6" high with a square section reinforcing strip 2 provided around its upper edge. The tank has an inlet end wall 3, an outlet end wall 4, side walls 5 and 6 and a lateral extension 7 at the outlet end.
The side wall 6 includes an overflow aperture with the bottom edge of the overflow aperture approximately 6" below the upper edge of the tank such that once the water level in the tank has risen to the bottom of the overflow aperture, further feed of water into the tank will cause overflow of the water in the tank through the overflow aperture into an overflow bowl 8 provided with a pipe 9 leading to a drain.
A grille 10 has longitudinal side bars 11, 12 extending parallel to and closely adjacent the side walls S and 6 respectively of the tank, a centre longitudinal bar 13 and a plurality of transverse bars 14. The grille 10 is shorter than the tank 1 thereby to leave a space 15 at the inlet end and a space 16 at the outlet end of the tank. The longitudinal bars 11, 12 and 13 and the transverse bars 14 are formed of square section stainless steel tube and the underside of the grille is covered by a stainless steel mesh 17 having a ' aperture. At the inlet end the grille has a portion 10a which slopes upwardly towards the inlet end of the tank and at the outlet end the grille 10 has a vertically extending portion 10b. The mesh 17 is continued beneath the portion 10a and up the righthand side of the portion 10b as viewed in Figure 2. A transversely extending hinged rubber flap 18 is provided at the free end of the portion 10a. A row of substantially horizontally extending bristles 19 is provided mounted on the outer side face of each of the side bars 11 and 12 of the grille, the width of the grille 10 compared with the width of the tank 1 being such that the bristles 19 brush the inner faces of the side walls 5 and 6.
The grille 10 has upstanding arms 20 welded to the side bars 11 and 12 of the grille, advantageously three arms 20 to each side bar, the upper ends of the arms 20 mounting bearing blocks 21, Figures 4 and 5.
Mounted on the upper edge of the side walls 5 and 6 of the tank adjacent the arms 20 of the grille are plates 22 mounting bearing blocks 23. Shafts 24 mounted in the bearing blocks 23, each have their inner end secured to one end of a crank 25, the other end of which is secured to a shaft 26 which extends through the bearing block 21 of the adjacent arm 20 of the grille 10.
Each shaft 26 extends across the grille to a corresponding crank arrangement provided on the opposite side of the tank. A longitudinal connecting rod 27 mounts three bearing bushes 28, one for each of the shafts 26. Laterally outwardly of the side wall 5, further cranks 29 are mounted one on each of the outer ends of the shafts 24. The free ends of the cranks 29 each mount a stub-shaft 30 engaged in a respective bearing block 31 carried by a second longitudinal connecting rod 32. The further cranks 29, bearing blocks 31 and connecting rod 32 have been omitted from Figure 2 in the interests of clarity.Advantageously the cranks 25 and 29 extend in opposite directions to one another from the opposite ends
of the respective shaft 24 whereby the weight of the cranks 29, the stub-shafts 30, the bearing blocks 31 and the longitudinal connecting rod 32 tends to offset the weight of the grille 10.
On the side wall 6 the plates 22 mount connecting rod is provided laterally outwardly of the side wall 6. The middle one of the shafts 24 mounted on the side wall 6 is however provided with a drive sprocket 33 whereby it can be chain-driven from a sprocket 34, Figure 3, mounted on the shaft of a gearbox 35 which is driven by an electric motor 36, the speed of which is variable by means of a hand wheel 37. The gearbox 35 and motor 36 are mounted on twin rails 38 standing on support legs 39 as shown in Figure 3 but not shown in
Figures 1 or 2.
Energisation of the motor 36 will thus rotate the sprocket 33, the shaft 24 on which the sprocket 33 is secured, and the crank 25 secured on that shaft 24 and thus will cause each of the shafts 26 to move in a circular path, the grille 10 thus also being constrained to move in a circular path while retaining its generally horizonal orientation.
The height of the bottom edge of the overflow aperture and the length of the cranks 25 and the arms 20 are so arranged that, during its circular path, the grille 10 remains submerged beneath the water in the tank by a depth which varies between about 3" and about 12".
Spaced along the side walls 5 and 6 of the tank from the inlet end wall 3 is an upstanding shield 40. Provided in the lateral extension 7 of the tank 1 is a conveyor 41 part of which is submerged below the water line, the level of which is indicated in
Figures 2 and 3 by the reference numeral 42.
A vertically extending water supply pipe 43 supplies water to a longitudinal pipe 44, a transverse pipe 45, a further longitudinal pipe 46 and a further transverse pipe 47.
Jets 48 are provided, three on the portion 47, two on the portion 46 and two on the portion 45. Water supplied through the jets will cause a surface water flow above the grille 10 in the direction indicated by the arrows in Figure 1 to the overflow aperture and hence into the overflow bowl 8 and drain pipe 9. Further jets 49 on the portion of pipe 44 are directed across the outlet space 16 towards the conveyor 41. Finally a drain 50, Figure 2, at the bottom of the tank 1 allows water to be drained from the tank 1. The drain 50 can be a gradual leak drain or an intermittently openable and closable dram.
In operation, cress top plants, preferably cut from the cress plants in a watercress bed by a mower with reciprocating cutters at a controlled height and with a fan-created suction arrangement to draw the cress top plants cut by the cutters immediately through ducts into bins, can be tipped between the shield 40 and the inlet end wall 3 of the tank into the inlet space 15 and when tipped therein will float on the surface of the water in the tank.
Energisation of the motor 36 will cause the grille 10 with the mesh 17 on its underface to move through a circular path while retaining its horizontal orientation. As the grille 10 moves downwardly in its circular path, the direction of rotation is anticlockwise as viewed in Figure 2, the sloping portion 10a of the grille 10 will bear downwardly on cress floating in the inlet space
15 and will press it downwardly in the water. The hinged flap 18 on the free end of the sloping portion 10a of the grille 10 guides the cress to a position beneath the
sloping portion 10a and prevents it from passing onto the upper side of the portion
10a of the grille.
After the grille passes through the bottom dead centre position of its circular path and begins to move upwardly the cress will float upwardly towards the surface of the water due to its normal buoyancy but will separate from the grille 10 since the grille is moved at a speed such that it moves upwardly more quickly than the cress floats upwardly. After passing through the top
dead centre position the grille will again bear downwardly on the cress but, having
regard to a particular piece of cress, the
portion of the grille which bears downwardly onto it the second time, will be spaced along the grille towards the outlet end of the tank compared with the portion
of the grille which bore downwardly on it the first time.
Successive repetitions will cause the cress
to be conveyed rightwardly as viewed in
Figures 1 and 2 towards the outlet end of
the tank. The downward movement imparted to the cress by the grille washes it in the water of the tank and any airborne insects and small pieces of vegetable matter adhering to the cress will be separated therefrom and will float upwardly through the
apertures in the mesh 17 of the grille 10 to lie on the surface of the water. Since there is a surface current towards the overflow aperture caused by the jets 48, the matter which has floated to the surface of the water will be carried out through the overflow
aperture mto the bowl 8 and down the drain pipe 9.Any heavy matter- such as snails or grit adhering to the cress will be separated therefrom and will sink to the bottom of the tank and will eventually move towards the drain 50 and pass therethrough when the drain is cpened.
When the cress passes from beneath the righthand end of the grille 10 as viewed in
Figures 1 and 2 it will float upwardly in the outlet space 16 and will rise to the surface to be propelled by the water from the jets 49 towards the conveyor 41. The upwardly extending portion 10b of the grille 10 and mesh 17 prevents cress floating on the surface in the outlet space 16 from passing back over the grille 10. The conveyor 41 lifts the cress from the tank 1 for chilling and packing.
Thus cress received from the mowing machine in bins needs only to be manually tipped into the inlet space 15, washing and removal from the tank 1 thereafter being effected automatically.
The force applied to the cress by the grille coming into engagement therewith is cushioned by the water and there is therefore no bruising or other damage to the cress.
WHAT WE CLAIM IS:- 1. Apparatus for washing buoyant material comprising a tank to contain water, a grille extending generally horizontally within the tank and mounted for movement in a circular path while retaining a generally horizontal orientation beneath the level of the surface of the water in the tank, the grille being so arranged in the tank that buoyant material fed to a position beneath the grille at an inlet end of the tank, the inlet end of the tank being that end of the tank away from which the grille moves as it passes through a bottom dead centre position in its circular path, is, by
each complete circular movement of the grille, pressed downwardly in the water by the grille and thereafter allowed to float upwardly again and is thereby conveyed beneath the grille along the tank from the inlet end to an outlet end.
2. Apparatus according to Claim 1, including water inlets to cause a surface current of the water towards an overflow located intermediate the inlet end and the outlet end.
3. Apparatus according to Claim 1 or
Claim 2, in which the grille has an upwardly sloping portion at the inlet end to assist feeding of the buoyant material to a position beneath the grille and at the outlet end has a substantially vertical portion which with the outlet end wall of the tank defines a space in which buoyant material, which has passed beneath the grille to the outlet end of the tank, can float up to the surface of the water and from which space it can be removed from the tank.
4. Apparatus according to Claim 3, ineluding a conveyor at one side of said space to remove the buoyant material from said space.
5. Apparatus according to Claim 4, in-cluding water inflow means at the other side of said space to urge the buoyant material m said space towards said conveyor.
6. Apparatus according to any one of
Claims 1 to 5, for washing watercress, and in which the tank is in the region of 22' long, 3'6" wide and 2'6" deep and is formed of stainless steel.
7. Apparatus according to Claim 6, in which the grille is a framework of stainless steel bars with a stainless steel mesh therebeneath, the stainless steel mesh having ' square apertures.
8. Apparatus according to any one of
Claims 1 to 7, m which grille is mounted on cranks and the cranks are motor driven at a speed of between 10 and 30 r.p.m., preferably between 15 and 25 r.p.m.
9. Apparatus according to Claim 8, in which the cranks are in the region of 4i" in length and the submersion of the grille in the water varies, during its movement in the circular path, between 3" and 12".
10. Apparatus according to any one of
Claims 1 to 9, including flexible means, for example bristles, provided between the side
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (15)
1. Apparatus for washing buoyant material comprising a tank to contain water, a grille extending generally horizontally within the tank and mounted for movement in a circular path while retaining a generally horizontal orientation beneath the level of the surface of the water in the tank, the grille being so arranged in the tank that buoyant material fed to a position beneath the grille at an inlet end of the tank, the inlet end of the tank being that end of the tank away from which the grille moves as it passes through a bottom dead centre position in its circular path, is, by
each complete circular movement of the grille, pressed downwardly in the water by the grille and thereafter allowed to float upwardly again and is thereby conveyed beneath the grille along the tank from the inlet end to an outlet end.
2. Apparatus according to Claim 1, including water inlets to cause a surface current of the water towards an overflow located intermediate the inlet end and the outlet end.
3. Apparatus according to Claim 1 or
Claim 2, in which the grille has an upwardly sloping portion at the inlet end to assist feeding of the buoyant material to a position beneath the grille and at the outlet end has a substantially vertical portion which with the outlet end wall of the tank defines a space in which buoyant material, which has passed beneath the grille to the outlet end of the tank, can float up to the surface of the water and from which space it can be removed from the tank.
4. Apparatus according to Claim 3, ineluding a conveyor at one side of said space to remove the buoyant material from said space.
5. Apparatus according to Claim 4, in-cluding water inflow means at the other side of said space to urge the buoyant material m said space towards said conveyor.
6. Apparatus according to any one of
Claims 1 to 5, for washing watercress, and in which the tank is in the region of 22' long, 3'6" wide and 2'6" deep and is formed of stainless steel.
7. Apparatus according to Claim 6, in which the grille is a framework of stainless steel bars with a stainless steel mesh therebeneath, the stainless steel mesh having ' square apertures.
8. Apparatus according to any one of
Claims 1 to 7, m which grille is mounted on cranks and the cranks are motor driven at a speed of between 10 and 30 r.p.m., preferably between 15 and 25 r.p.m.
9. Apparatus according to Claim 8, in which the cranks are in the region of 4i" in length and the submersion of the grille in the water varies, during its movement in the circular path, between 3" and 12".
10. Apparatus according to any one of
Claims 1 to 9, including flexible means, for example bristles, provided between the side
edges of the grille and the side walls of the tank to prevent the buoyant material from passing therebetween.
11. A method of processing watercress comprising tipping, into an inlet end of a tank, only the tops of watercress plants cut by a mowing machine having a pair of co-operating reciprocating cutters and an air suction arrangement to carry away from the cutters the cress plant tops cut by the cutters, the tank containing water and having a grille extending generally horizontally within the tank, the grille being mounted on cranks, rotating the cranks by a motor such that the grille moves in a circular path while retaining a generally horizontal orientation beneath the level of the surface of the water in the tank whereby the cress plant tops are washed by being repeatedly pressed downwardly in the water by the grille and thereafter allowed to float upwardly again and are thereby conveyed beneath the grille along the tank to an outlet end, removing the cress plant tops from the tank and loosely piling them into bags of a breathing plastics material.
12. A method according to Claim 11, including directing water sprays onto the surface of the water in the tank to cause a surface current of the water towards an overflow located intermediate the inlet end and the outlet end, the surface water flow from the overflow being in the region of 1,500 gallons per hour.
13. Apparatus for washing buoyant material substantially as hereinbefore described and illustrated with reference to the accompanying drawings.
14. A method of processing watercress as claimed in Claim 11 and substantially as hereinbefore described.
15. Watercress when processed by the method of Claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4732877A GB1562266A (en) | 1977-11-14 | 1977-11-14 | Apparatus for washing buoyant material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4732877A GB1562266A (en) | 1977-11-14 | 1977-11-14 | Apparatus for washing buoyant material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1562266A true GB1562266A (en) | 1980-03-12 |
Family
ID=10444555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4732877A Expired GB1562266A (en) | 1977-11-14 | 1977-11-14 | Apparatus for washing buoyant material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1562266A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006079347A1 (en) * | 2005-01-31 | 2006-08-03 | Holm Christensen Biosystemer Aps | A method for separation of heterogeneous products, including household waste |
| WO2008083640A1 (en) * | 2007-01-12 | 2008-07-17 | Alexander Koslow | Method of, and apparatus for, separating out materials heavier than plastic, in particular metals, by flotation in a water bath, in a separation of plastics of different densities |
-
1977
- 1977-11-14 GB GB4732877A patent/GB1562266A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006079347A1 (en) * | 2005-01-31 | 2006-08-03 | Holm Christensen Biosystemer Aps | A method for separation of heterogeneous products, including household waste |
| AU2006208531B2 (en) * | 2005-01-31 | 2009-07-23 | Holm Christensen Biosystemer Aps | A method for separation of heterogeneous products, including household waste |
| US7905356B2 (en) | 2005-01-31 | 2011-03-15 | Holm Christensen Biosystemer Aps | Method for separation of heterogeneous products, including household waste |
| WO2008083640A1 (en) * | 2007-01-12 | 2008-07-17 | Alexander Koslow | Method of, and apparatus for, separating out materials heavier than plastic, in particular metals, by flotation in a water bath, in a separation of plastics of different densities |
| US9375724B2 (en) | 2007-01-12 | 2016-06-28 | Alexander Koslow | Method of and apparatus for separating out materials heavier than plastic, in particular metals, by flotation in a water bath, in a separation of plastics of different densities |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19971113 |