US3586067A - Method and apparatus for filling containers - Google Patents
Method and apparatus for filling containers Download PDFInfo
- Publication number
- US3586067A US3586067A US830626A US3586067DA US3586067A US 3586067 A US3586067 A US 3586067A US 830626 A US830626 A US 830626A US 3586067D A US3586067D A US 3586067DA US 3586067 A US3586067 A US 3586067A
- Authority
- US
- United States
- Prior art keywords
- powder
- pressure
- container
- chamber
- densified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 60
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
- B65B1/18—Methods of, or means for, filling the material into the containers or receptacles for filling valve-bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
- B65B63/02—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles
- B65B63/028—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles by pneumatic means
Definitions
- This invention relates to a method and apparatus for densifying or compacting powder in a chamber and then transferring it to a container such as a sack, the method being that the powder is fed to a chamber where it is first subjected to a pressure below ambient pressure and then rapidly increasing the pressure, the increase of pressure may be used to feed the densified powder to the container, the apparatus comprises a chamber having a charging opening, an evacuating and pressurizing connection, and a connection for transferring the treated powder to the container.
- This invention relates to a method and apparatus for the purpose of densifying or compacting powders, that is to say the removal of at least some of the air or other gas entrapped in the powder, and filling containers with the powder.
- a gas usually air
- air becomes entrapped within the powder, which can cause difficulties in the subsequent handling of the powder.
- the powder is introduced into a flexible bag or sack, if no means are provided for permitting the entrapped air to escape, such as by using a gas-permeable material for the sack, the air will remain within the sack rendering it awkward to handle.
- One method of densifying or compacting powder consists of allowing the powder to fall through a chamber maintained at less than atmospheric pressure and then discharging the powder into a sack taking care not to allow significant reaeration of the powder.
- the present invention consists in a method of providing a container with densified or compacted powder, in which the powder is first subjected to an air or other gas pressure of less than its ambient pressure and then the pressure is increased rapidly to densify or compact the powder after which the thus treated powder isthen transfered to the container.
- the invention further consists in apparatus for densifying or compacting powders, which includes a chamber having means for subjecting a powder within the chamber first to a pressure of less than its ambient pressure and then to a rapidly increased pressure.
- apparatus for densifying or compacting powders such as milled china clay.
- the apparatus includes a chamber CH into which a batch of the powder P is introduced from a hopper l-l via a butterfly valve BV, the powder reaching a level A.
- valve BV closed control valve CV With the valve BV closed control valve CV] is opened to connect the interior of the chamber in a filter F to a source of vacuum, say of the order of 25 inches of mercury.
- Valve CV1 is then closed and control valve CV2 opened to connect the interior of the chamber to a source of compressed air say up to to p.s.i., causing a rapid increase in pressure over a period of a number of seconds. This causes the level of the powder to fall to level C, i.e. more dense than its original state, and the compressed air will also clear the filter F.
- Powder is taken via an outlet 0 connected to the chamber by a flexible coupling and having a weighing mechanism W, for weighing the powder passing through the outlet.
- the increased pressure above the powder assists in expellipjg the powder, almost In the manner of an extrusion process ue to the physical characteristics of the densified or compacted powder and effect of the pressure.
- a pressure of greater than atmospheric pressure after the reduced pressure, but in some cases it may be found adequate merely to'return the pressure to atmospheric pressure or to a pressure between the reduced pressure and atmosphere, the change being effected rapidly.
- the pressure is increased from a vacuum of 25 inches of mercury to atmospheric pressure, it has been found that if this is achieved in a period of the order of a few seconds, say, 3 seconds, then this is sufficiently rapid to achieve the desired densifying or compacting.
- the present invention although directed towards the filling of sacks and the like, considers the feasibility of applying the invention to the filling of larger containers such as road or rail bulk carriers and to filling the holds of ships.
- a method of filling a container with densified powder which includes the steps of:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Abstract
This invention relates to a method and apparatus for densifying or compacting powder in a chamber and then transferring it to a container such as a sack, the method being that the powder is fed to a chamber where it is first subjected to a pressure below ambient pressure and then rapidly increasing the pressure, the increase of pressure may be used to feed the densified powder to the container, the apparatus comprises a chamber having a charging opening, an evacuating and pressurizing connection, and a connection for transferring the treated powder to the container.
Description
United States Patent [72] lnventor l-lan-Jorgen Bye-Jorgensen Gravesend, Kent, England [21] Appl. No. 830,626
[22] Filed June 5, 1969 [45] Patented June 22, 1971 [73] Assignee Sack Fillers Limited, Northfleet,
Gravesend, Kent, England [32] Priority June 13, 1968 [3 3] Great Britain [54] METHOD AND APPARATUS FOR FILLING CONTAINERS 1 Claim, 1 Drawing Fig.
[52] US. Cl. 141/12, 264/ 121 [51] Int. CL 1365b 1/26 302/21,53,66;53/24, 124D; 264/121; l8/l6F [56] References Cited UNITED STATES PATENTS 3,192,964 7/1965 Vogt Primary Examinerl-1ouston S. Bell, Jr. Attorney-Holman & Stern ABSTRACT: This invention relates to a method and apparatus for densifying or compacting powder in a chamber and then transferring it to a container such as a sack, the method being that the powder is fed to a chamber where it is first subjected to a pressure below ambient pressure and then rapidly increasing the pressure, the increase of pressure may be used to feed the densified powder to the container, the apparatus comprises a chamber having a charging opening, an evacuating and pressurizing connection, and a connection for transferring the treated powder to the container.
METHOD AND APPARATUS FOR FILLING CONTAINERS This invention relates to a method and apparatus for the purpose of densifying or compacting powders, that is to say the removal of at least some of the air or other gas entrapped in the powder, and filling containers with the powder.
During the normal course of the manufacture of powders, and their subsequent handling, e.g. pouring, a gas, usually air, becomes entrapped within the powder, which can cause difficulties in the subsequent handling of the powder. For example, when the powder is introduced into a flexible bag or sack, if no means are provided for permitting the entrapped air to escape, such as by using a gas-permeable material for the sack, the air will remain within the sack rendering it awkward to handle.
Therefore, when using sacks of a material which is not gasperrneable, e.g. when using plastics sacks, then it is highly desirable to densify or compact the powder before filling it into the sack. Moreover, when a powder containing air or other gas as a consequence of its manufacture and subsequent handling is introduced into any rigid or flexible container, whether it be composed of gas-permeable material or not, the powder will occupy an unnecessarily large volume thereby increasing the sire of container needed for a given mass of powder or reducing the mass which can be filled into a given volume.
One method of densifying or compacting powder consists of allowing the powder to fall through a chamber maintained at less than atmospheric pressure and then discharging the powder into a sack taking care not to allow significant reaeration of the powder.
However, it has been found that when such a method is not used and an attempt is made to remove entrapped air from a powder merely by subjecting the mass of powder to less than atmospheric pressure, then most powders will increase in volume to a greater or less extent instead of densifying or compacting, gas thereby remaining entrapped in the powder. Milled china clay (kaolin) is one powder in which this characteristic is particularly noticeable.
It is an object of the present invention to provide an improved method and apparatus in which the above ditficulty is effectively overcome. i
The present invention consists in a method of providing a container with densified or compacted powder, in which the powder is first subjected to an air or other gas pressure of less than its ambient pressure and then the pressure is increased rapidly to densify or compact the powder after which the thus treated powder isthen transfered to the container.
The invention further consists in apparatus for densifying or compacting powders, which includes a chamber having means for subjecting a powder within the chamber first to a pressure of less than its ambient pressure and then to a rapidly increased pressure. In carrying the invention into effect according to one convenient mode by way of example, the accompanying drawing shows diagrammatically apparatus for densifying or compacting powders such as milled china clay. The apparatus includes a chamber CH into which a batch of the powder P is introduced from a hopper l-l via a butterfly valve BV, the powder reaching a level A.
With the valve BV closed control valve CV] is opened to connect the interior of the chamber in a filter F to a source of vacuum, say of the order of 25 inches of mercury.
As a consequence of the characteristics of milled china clay, as explained above, the level of the powder will rise to level B.
Valve CV1 is then closed and control valve CV2 opened to connect the interior of the chamber to a source of compressed air say up to to p.s.i., causing a rapid increase in pressure over a period of a number of seconds. This causes the level of the powder to fall to level C, i.e. more dense than its original state, and the compressed air will also clear the filter F.
Powder is taken via an outlet 0 connected to the chamber by a flexible coupling and having a weighing mechanism W, for weighing the powder passing through the outlet. The increased pressure above the powder assists in expellipjg the powder, almost In the manner of an extrusion process ue to the physical characteristics of the densified or compacted powder and effect of the pressure.
Some difiiculty may be experienced in expelling the powder in this manner due to the fact that on densifying or compacting not only does the level of the powder fall but it also contracts away from the walls of the chamber leaving a gap through which pressure can escape to the outlet 0 without assisting in expelling the powder. if necessary, this escape of pressure can be prevented by an annular bafi'le BA secured to the wall of the chamber to block the gap created upon or densifying or compacting.
Although a batch process has been described, it may be possible to operate the method as a continuous process, e.g. by passing the powder first through a region of reduced pressure and then passing it rapidly into a region of higher pressure.
It is preferred to apply a pressure of greater than atmospheric pressure after the reduced pressure, but in some cases it may be found adequate merely to'return the pressure to atmospheric pressure or to a pressure between the reduced pressure and atmosphere, the change being effected rapidly. Where the pressure is increased from a vacuum of 25 inches of mercury to atmospheric pressure, it has been found that if this is achieved in a period of the order of a few seconds, say, 3 seconds, then this is sufficiently rapid to achieve the desired densifying or compacting.
it can be appreciated that the present invention, although directed towards the filling of sacks and the like, considers the feasibility of applying the invention to the filling of larger containers such as road or rail bulk carriers and to filling the holds of ships.
We claim:
1. A method of filling a container with densified powder, which includes the steps of:
reducing the gas pressure upon a powder in a container to less than atmospheric pressure;
thereafter rapidly increasing the pressure upon the powder to a pressure greater than atmospheric pressure whereby the powder is densified; and
expelling the densified powder from the chamber, under the influence of said pressure greater than atmospheric pressure, into a container until the container is filled to its capacity, without significant reaeration of the densified powder.
Claims (1)
1. A method of filling a container with densified powder, which includes the steps of: reducing the gas pressure upon a powder in a container to less than atmospheric pressure; thereafter rapidly increasing the pressure upon the powder to a pressure greater than atmospheric pressure whereby the powder is densified; and expelling the densified powder from the chamber, under the influence of said pressure greater than atmospheric pressure, into a container until the container is filled to its capacity, without significant reaeration of the densified powder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2817268 | 1968-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3586067A true US3586067A (en) | 1971-06-22 |
Family
ID=10271428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US830626A Expired - Lifetime US3586067A (en) | 1968-06-13 | 1969-06-05 | Method and apparatus for filling containers |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3586067A (en) |
| BE (1) | BE734421A (en) |
| CH (1) | CH491782A (en) |
| DE (1) | DE1929559A1 (en) |
| FR (1) | FR2010818A1 (en) |
| NL (1) | NL6909025A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255374A (en) * | 1977-07-04 | 1981-03-10 | Institut Cerac S.A. | Method of compacting powder |
| US4412829A (en) * | 1980-04-08 | 1983-11-01 | Baumgartner Papiers, S.A. | Production of cigarette filter units |
| US4648432A (en) * | 1985-07-12 | 1987-03-10 | Emmanuel Mechalas | Vacuum apparatus for filling bags with particulate material including dust collector and recycling of collected material |
| US4810275A (en) * | 1986-07-23 | 1989-03-07 | Alcatel Nv | Method of making optical waveguides using glass forming pulverulent material |
| US5241998A (en) * | 1991-10-30 | 1993-09-07 | Suprex Corporation | Apparatus and method for packing particles |
| EP0761423A2 (en) * | 1995-09-11 | 1997-03-12 | Intermetallics Co., Ltd. | Powder packing method |
| US20170077458A1 (en) * | 2015-09-14 | 2017-03-16 | Boe Technology Group Co., Ltd. | Filling apparatus used in an evaporator system and filling method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3115516B1 (en) | 2020-10-22 | 2022-09-09 | Psa Automobiles Sa | Method and device for typing the driving mode of an autonomous vehicle |
-
1969
- 1969-06-05 US US830626A patent/US3586067A/en not_active Expired - Lifetime
- 1969-06-06 CH CH862369A patent/CH491782A/en not_active IP Right Cessation
- 1969-06-11 BE BE734421D patent/BE734421A/xx unknown
- 1969-06-11 DE DE19691929559 patent/DE1929559A1/en active Pending
- 1969-06-11 FR FR6919344A patent/FR2010818A1/fr not_active Withdrawn
- 1969-06-13 NL NL6909025A patent/NL6909025A/xx unknown
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255374A (en) * | 1977-07-04 | 1981-03-10 | Institut Cerac S.A. | Method of compacting powder |
| US4412829A (en) * | 1980-04-08 | 1983-11-01 | Baumgartner Papiers, S.A. | Production of cigarette filter units |
| US4648432A (en) * | 1985-07-12 | 1987-03-10 | Emmanuel Mechalas | Vacuum apparatus for filling bags with particulate material including dust collector and recycling of collected material |
| US4810275A (en) * | 1986-07-23 | 1989-03-07 | Alcatel Nv | Method of making optical waveguides using glass forming pulverulent material |
| US5241998A (en) * | 1991-10-30 | 1993-09-07 | Suprex Corporation | Apparatus and method for packing particles |
| US5363886A (en) * | 1991-10-30 | 1994-11-15 | Suprex Corporation | Apparatus and method for packing particles |
| EP0761423A2 (en) * | 1995-09-11 | 1997-03-12 | Intermetallics Co., Ltd. | Powder packing method |
| EP0761423A3 (en) * | 1995-09-11 | 1998-07-08 | Intermetallics Co., Ltd. | Powder packing method |
| US20170077458A1 (en) * | 2015-09-14 | 2017-03-16 | Boe Technology Group Co., Ltd. | Filling apparatus used in an evaporator system and filling method |
| US10276835B2 (en) * | 2015-09-14 | 2019-04-30 | Boe Technology Group Co., Ltd. | Filling apparatus used in an evaporator system and filling method |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6909025A (en) | 1969-12-16 |
| BE734421A (en) | 1969-11-17 |
| DE1929559A1 (en) | 1969-12-18 |
| FR2010818A1 (en) | 1970-02-20 |
| CH491782A (en) | 1970-06-15 |
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