US3341087A - Method and apparatus for forming liquid drops - Google Patents

Method and apparatus for forming liquid drops Download PDF

Info

Publication number
US3341087A
US3341087A US316652A US31665263A US3341087A US 3341087 A US3341087 A US 3341087A US 316652 A US316652 A US 316652A US 31665263 A US31665263 A US 31665263A US 3341087 A US3341087 A US 3341087A
Authority
US
United States
Prior art keywords
liquid
plunger
passageway
nozzle
drop
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
Application number
US316652A
Other languages
English (en)
Inventor
Rosin Sebastian Nicholas
Wormald Derek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROSIN ENGINEERING Co Ltd
Original Assignee
ROSIN ENGINEERING Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ROSIN ENGINEERING Co Ltd filed Critical ROSIN ENGINEERING Co Ltd
Application granted granted Critical
Publication of US3341087A publication Critical patent/US3341087A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0241—Drop counters; Drop formers
    • B01L3/0265—Drop counters; Drop formers using valves to interrupt or meter fluid flow, e.g. using solenoids or metering valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
    • A61J3/06—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of pills, lozenges or dragees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium

Definitions

  • one known apparatus comprises a nozzle having a cylindrical bore in which is positioned a conical needle.
  • the needle is stationary during the dripping operation but its position may be altered so as to increase or decrease the cross sectional area of the annular space between the needle and the nozzle bore thereby adjusting both the speed of drop formation and the quantitative output.
  • Another known method of drop forming comprises maintaining a constant level of the liquid in a container, leading the liquid to the upper end of at least one tube mounted in the bottom of the container and causing a piston to reciprocate within each of the tubes with a gap between each tube and its piston through which liquid flows, with the lower end of each piston projecting beyond the lower end of its tube so that drops become detached from the pistons according to the frequency of the reciprocation at each upwardly directed movement of the piston.
  • the dimensions of the nozzle passageway and of the movable piston allow a continuous flow of the molten material through the nozzle when the piston is stationary.
  • the cross sections of the pistons and passageway bores are required to be accurate to within extremely narrow tolerances since the nature of the continuous annular flow is such that slight inaccuracies in these dimensions are greatly magnified in the resulting size of drop and cause flooding.
  • the invention is particularly useful in the production of pellets or pastilles and this is commonly effected in a machine (hereinafter referred to as a pastillating machine) of the type in which drops of liquid are dispensed via one or more liquid drop dispensers from a liquid reservoir onto a surface, which, if a molten material is used, may be cooled, for example on a cooled conveyor band, cooling cylinder, cooling plate or the like.
  • a molten material may be cooled, for example on a cooled conveyor band, cooling cylinder, cooling plate or the like.
  • the solidification may be effected by polymerization, gelling, drying, etc. Consequently, it is a further object of the invention to provide an improved pastillating machine which is capable of attaining higher volumetric outputs and speeds of reciprocation than hitherto known types.
  • the presentmethod of forming and releasing a successive- 3,341,987 Patented Sept. 12, 1967 sion of discrete liquid drops from a main body of liquid comprises admitting liquid from the main body into a passageway having an open outlet end at a location remote from the open outlet end and applying pulsations to the liquid entering the passageway, thus decelerating the liquid in the passageway and causing drops to be released from the open outlet end.
  • the invention further consists in a method of forming and releasing a succession of discrete liquid drops from a main body of liquid through an open ended passageway which receives liquid from said main body through port means located remote from said open end, comprising reciprocating plunger means in association with the passageway between an inner position in which the port means are at least partially open and an outer position in which the plunger means remains remote from said open end, the plunger means being eifective to decelerate the liquid in the passageway during a part of each reciprocation, the combined effect of which deceleration and of the momentum of the liquid towards said open end, causes a drop to form and separate from the liquid in the passageway and to be released from the open end.
  • the invention still further consists in a method of forming and releasing a succession of discrete liquid drops from a main body of liquid through an open-ended passageway having port means communicating with the main body of liquid, comprising reciprocating plunger means in co-operation with the passageway between an inner and an outer position to cause the flow of liquid through said port means to be shut off or throttled, and so controlled,
  • the plunger means also creating drop forming pulsations through the liquid in the passageway whereby drops are formed, at the same frequency as the plunger means reciprocates, as the liquid issues from the open end of the passageway.
  • the invention still further consists in a drop forming device comprising a nozzle having an internal passageway adapted to receive liquid from a main liquid body via port means, reciprocable plunger means, and means for reciprocating the plunger means in co-operation with the nozzle, between an inner and an outer position to repeatedly shut off or throttle the flow of liquid through said port means thereby controlling the supply of liquid to the passageway, the plunger means also being effective to create drop forming pulsations through the liquid in the passageway, whereby drops are formed, at the same frequency as the plunger means reciprocates, as the liquid issues from the open end of the passageway.
  • the invention still further consists in a pastillating machine having one or more drop forming devices according to the preceding paragraph.
  • FIGURE 1 is a sectional elevation through the reservoir tank of a drop dispenser.
  • FIGURES 2 to 6 show alternative forms of drop dispenser to that shown in FIGURE 1, and
  • FIGURE 7 is side elevation, partly in section, of a pastillating machine showing one of a number of drop dispensers positioned therein.
  • FIGURE 1 shows a liquid drop dispenser mounted at the base of a molten liquid reservoir tank 1 for dispensing a succession of liquid drops from the reservoir tank, for example, onto cooling surface where the drops solidify to form pastilles.
  • Each drop dispenser comprises a nozzle generally indicated by 3, lower portion 6 of which is provided with an internal passageway 4 and means, for example an external screw thread 5 for attaching the nozzle in a vertical position to the base of the reservoir tank 1.
  • the internal nozzle passageway 4 may be of any convenient cross section, but a cylindrical bore is preferred.
  • the configuration of the nozzle 3 is such that when screwed into the tank, only its lower end projects therefrom while upper portions 9 and 7 extend into the reservoir to be immersed in the liquid.
  • the upper portion 7 is provided with port means consisting of one or more liquid admitting ports 8 formed in its wall at or near the bottom of the tank and these may be of any desired number and form.
  • guide means 9 which may be integral with, or an extension to, the nozzle, are provided for pulsating means consisting of a reciprocable plunger 10 (shown at or towards the bottom of its stroke) which is connected at its upper extremity to a reciprocating means.
  • pulsating means consisting of a reciprocable plunger 10 (shown at or towards the bottom of its stroke) which is connected at its upper extremity to a reciprocating means.
  • the following description refers to a cylindrical passageway and plunger but it is appreciated that the description is also applicable to other configurations of the passageway and to other pulsating means, e.g., a disc or plate partly or fully covering and uncovering suitable port means, e.g., not entering the passageway or a plunger having a conical tip which reciprocates in the port of the nozzle.
  • the plunger 10 comprises a cylindrical rod, the diameter of which has a sliding fit within the upper portion of the nozzle 3 so as to substantially prevent an annular flow of liquid between the plunger and the surrounding nozzle wall above the ports.
  • the ratio of plunger diameter to the internal diameter of the portion of the nozzle in which the plunger reciprocates may be of the order of 0.97 to 1.
  • the reciprocation means may for example take the form of an eccentrically driven cross-bar into which the plunger is screwed, and it is arranged by suitable adjustment of the plunger in the cross bar so that the active lowermost surface 11 of the plunger within the upper portions 9 and 7 of the nozzle may reciprocate between an extreme upper position at or-above the top of the ports and an extreme lower position at, above or below the bottom of the ports, but, it is generally preferred to operate with the plunger travelling from a position above the top of the ports to a position just below the ports at the bottom of its stroke. If the plunger movement, produced by an eccentric drive, is not suitable, it may be replaced by cam action. In this case, the duration of the plunger reciprocation may be less than the duration of the cycle.
  • the arrangement of the ports 8 and nozzle passageway is such that when the plunger 9 is in the extreme upper (or inner) position, liquid is freely admitted to the passageway, and that with certain exceptions, of which an example will be given, the plunger, on its downward movement (or movement towards its outer position), cover the ports so that the flow of liquid to the passageway is either throttled or interrupted.
  • the liquid which flows through them into the passageway corresponds to the average volume of the drop formed.
  • the cross-sectional area of the ports have to be dimensioned to suit this requirement and generally has to be increased for larger outputs and more viscous liquids.
  • the dimensions of the port and passageway may be such that for a given liquid the plunger speed when covering the ports is less than the speed of the liquid flow through the passageway.
  • the plunger in its downward movement, decelerates the liquid in the passageway. This process continues until on its return stroke the plunger again uncovers the ports.
  • This deceleration of the volume of liquid upstream of the drop assists and speeds up the process of drop formation and its separation from the liquid in the passageway.
  • the arrangement be such that during part of the return stroke of the plunger there is a reversal of the forward flow in the passageway.
  • the dimensions of the port and the passageway may, on the other hand, be so chosen in relation to the plunger or equivalent pulsating means that during the downward movement of the latter an impulse is transmitted to the liquid in the passageway. In this case the deceleration only begins when towards the end of the downward stroke.
  • the apparatus has been satisfactorily operated at frequencies of the order of 1,000 reciprocations (and hence 1,000 drops) per minute, and is considered to be capable of operating at frequencies in excess of this.
  • the length of stroke of the plunger is another variable capable of adjustment since this, together with plunger velocity, influence the size of drop formed.
  • one satisfactory port configuration is a narrow circumferentially extending slit, since this provides maximum liquid supply for minimum plunger movement, which enables short plunger strokes and consequently high frequencies of reciprocation and drop formation to be employed.
  • the ports can be of circular cross section and there may be one port or a number of ports.
  • the center line of the nozzle should be generally parallel to the surface of the cooling band and the vertical distance between this center line and the band surface as small as convenient.
  • the drop forming apparatus includes a passageway 4 of constant cross section, but the cross section may be varied along the length of the passageway.
  • the plunger instead of co-operating with the ports from within, as shown in FIGURE 1, may be constructed in the form of a sleeve 12 as shown in FIGURE 2 fitting around the upper portion of the nozzle and co-operating with ports 13 externally.
  • the upper end of the sleeve is closed and connected to the reciprocating means by a rod 15.
  • the sleeve as shown in FIGURE 4, may have a port or ports 17 formed in its walls, to co-operate with nozzle ports 18, or, as shown in FIGURE 3, the nozzle ports may be eliminated, and only a sleeve port or ports 16 used.
  • the area of the forward face of the plunger is larger than the cross sectional area of the passageway.
  • the larger plunger displacement therefore, leads under otherwise identical conditions to a larger forward velocity of the liquid in the passageway than in the arrangement of FIGURE 1.
  • the constructions of FIGURES 2 to 4 are preferred.
  • the plunger may also be in the form of a disc 34 (see FIG. 5) or a cone 35 (see FIG. 6). In these cases, the opening at the top of the passageway 4 forms the port means.
  • FIGURE 7 shows a section of a pastillating machine in which vessel 1 may be heated by electrical or other means e.g., an outer jacket 31 through which a heating fluid is circulated.
  • the liquid product is fed into this vessel through pipe 20, with the flow into the vessel being adjustable by a valve 21 which is generally automatically controlled.
  • the nozzles 3 are screwed into the base of this vessel.
  • the plungers 10 are carried by a reciprocating plunger bar 22 which, at each end, is fixed to a guide pillar 23 passing through brass sleeve bearing 24. These pillars are coupled by self aligning bearing bushings 25 to connection rods 26 driven by two eccentric self aligning bearings 27 on a rotating shaft 28. This shaft is driven :by a variable speed gear 29 which allows the rate of reciprocation of the plungers to be varied. This gear 29 is driven by a motor 30 running at 1440 rpm. for example.
  • the drops fall on to a moving steel conveyor band 32 which is cooled by water sprays 33 on the underside.
  • a method of dispensing a liquid in the form of a continuous series of discrete drops of uniform size from a container of the liquid including a nozzle having an axial passageway communicating with the interior of the container and having an unobstructed outlet opening and including a reciprocable plunger cooperating with the nozzle to control the flow of liquid therethrough comprising the steps of moving the plunger toward and away from the nozzle so as to cause a drop to be dispensed from the outlet opening during each cycle of plunger operation, and maintaining a volume of the liquid being dispensed within the nozzle passageway at the unobstructed outlet end thereof at all times during the cycle of plunger operation so that each drop of liquid is dispensed by causing it to separate from the body of liquid maintained within the nozzle passageway.
  • apparatus for dispensing a liquid in the form of a continuous series of discrete drops of uniform size including a container for liquid to be dispensed, nozzle means in the wall of the container having an inlet opening communicating with the interior of the container through which liquid to be dispensed is received into the nozzle means and having an axial passageway communicating with the inlet opening, and a reciprocable plunger cooperating with the nozzle means inlet opening and having an end movable axially with respect to the nozzle passageway between a first extreme position spaced from the inlet opening and a second extreme position adjacent to the inlet opening to control the flow of liquid into the nozzle passageway, the improvement comprising a tubular extension of the nozzle means forming an unobstructed axial extension of the passageway therein extending a substantial distance beyond the second extreme position of the end of the plunger and terminating in an unobstructed outlet opening so as to retain a selected volume of the liquid within the passageway after each drop has been dispensed from the outlet opening thereof.
  • the nozzle means includes an inwardly extending portion within the container, the plunger end being slidably guided therein, the inlet opening comprising an aperture in the wall of the inwardly extending portion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Clinical Laboratory Science (AREA)
  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
US316652A 1962-10-19 1963-10-16 Method and apparatus for forming liquid drops Expired - Lifetime US3341087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB39715/62A GB1055267A (en) 1962-10-19 1962-10-19 Improvements in and relating to liquid drop forming apparatus

Publications (1)

Publication Number Publication Date
US3341087A true US3341087A (en) 1967-09-12

Family

ID=10411082

Family Applications (1)

Application Number Title Priority Date Filing Date
US316652A Expired - Lifetime US3341087A (en) 1962-10-19 1963-10-16 Method and apparatus for forming liquid drops

Country Status (4)

Country Link
US (1) US3341087A (fr)
DE (1) DE1295531C2 (fr)
GB (1) GB1055267A (fr)
NL (1) NL299526A (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457335A (en) * 1965-07-21 1969-07-22 Herbert James Elliott Pelletisation of fusible substances
US3456694A (en) * 1967-02-01 1969-07-22 Mallory & Co Inc P R Slurry dispenser
US3505432A (en) * 1966-01-28 1970-04-07 Alfred A Neuwald Polyolefine scenting method
FR2299625A1 (fr) * 1975-01-08 1976-08-27 Eastman Kodak Co Recipient, appare
US4041995A (en) * 1975-01-30 1977-08-16 Eastman Kodak Company Gas pressure-activated drop dispenser
US4294406A (en) * 1978-11-14 1981-10-13 Pevnick Stephen H Program controllable free falling water drop fountain
US4910850A (en) * 1983-03-22 1990-03-27 Mitsubishi Rayon Company, Ltd. Method for coagulation of a polymer latex
US5089229A (en) * 1989-11-22 1992-02-18 Vettest S.A. Chemical analyzer
US5229164A (en) * 1985-12-19 1993-07-20 Capsoid Pharma Gmbh Process for producing individually dosed administration forms
US5250262A (en) * 1989-11-22 1993-10-05 Vettest S.A. Chemical analyzer
US5340509A (en) * 1992-06-30 1994-08-23 Shell Oil Company Process for pelletizing ultra high melt flow crystalline polymers and products therefrom
US7273591B2 (en) 2003-08-12 2007-09-25 Idexx Laboratories, Inc. Slide cartridge and reagent test slides for use with a chemical analyzer, and chemical analyzer for same
US8585989B2 (en) 2003-12-04 2013-11-19 Idexx Laboratories, Inc. Retaining clip for reagent test slides
US9116129B2 (en) 2007-05-08 2015-08-25 Idexx Laboratories, Inc. Chemical analyzer
US20160242404A1 (en) * 2013-09-12 2016-08-25 Beijing Research Center For Information Technology In Agriculture Device and method for producing quantitative-diameter spray droplets of pesticide
US9797916B2 (en) 2014-01-10 2017-10-24 Idexx Laboratories, Inc. Chemical analyzer
CN109999718A (zh) * 2019-01-31 2019-07-12 En科技有限公司 液体球形颗粒制备装置和液体球形颗粒的制备方法
US11977091B2 (en) 2020-07-10 2024-05-07 Idexx Laboratories Inc. Point-of-care medical diagnostic analyzer and devices, systems, and methods for medical diagnostic analysis of samples

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421603A (en) * 1977-07-19 1979-02-19 Pilot Pen Co Ltd Method of extracting even quantity of liquid by trickling
US4805806A (en) * 1980-12-17 1989-02-21 Boc Limited Apparatus for dispensing liquefied gas
US5143659A (en) * 1989-10-04 1992-09-01 Eastman Kodak Company Method and apparatus for manufacturing aspherically shaped small lenses
US5040961A (en) * 1989-10-04 1991-08-20 Eastman Kodak Company Apparatus for manufacturing aspherically shaped small lenses
DE4202561A1 (de) * 1992-01-30 1993-08-05 Boehringer Mannheim Gmbh Vorrichtung zum dosierten zufuehren einer analysefluessigkeit
DE102013006106A1 (de) 2013-04-09 2014-10-09 Delo Industrie Klebstoffe Gmbh & Co. Kgaa Dosiervorrichtung
CN110664617A (zh) * 2019-09-27 2020-01-10 重庆大云端科技有限公司 养老院老人药片智能供应系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US682819A (en) * 1901-04-22 1901-09-17 Henry Sporland Candy-making machine.
US1938219A (en) * 1928-06-14 1933-12-05 Stockholms Benmjolsfabriks Akt Means for dividing substances in liquid state into drops
US2790201A (en) * 1954-06-19 1957-04-30 Basf Ag Apparatus for manufacturing pellets from fusible materials
US3048128A (en) * 1955-03-10 1962-08-07 Warren Christopher John Lewis Method for making sweets

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL100194C (fr) * 1955-12-16

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US682819A (en) * 1901-04-22 1901-09-17 Henry Sporland Candy-making machine.
US1938219A (en) * 1928-06-14 1933-12-05 Stockholms Benmjolsfabriks Akt Means for dividing substances in liquid state into drops
US2790201A (en) * 1954-06-19 1957-04-30 Basf Ag Apparatus for manufacturing pellets from fusible materials
US3048128A (en) * 1955-03-10 1962-08-07 Warren Christopher John Lewis Method for making sweets

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457335A (en) * 1965-07-21 1969-07-22 Herbert James Elliott Pelletisation of fusible substances
US3505432A (en) * 1966-01-28 1970-04-07 Alfred A Neuwald Polyolefine scenting method
US3456694A (en) * 1967-02-01 1969-07-22 Mallory & Co Inc P R Slurry dispenser
FR2299625A1 (fr) * 1975-01-08 1976-08-27 Eastman Kodak Co Recipient, appare
US4041995A (en) * 1975-01-30 1977-08-16 Eastman Kodak Company Gas pressure-activated drop dispenser
US4294406A (en) * 1978-11-14 1981-10-13 Pevnick Stephen H Program controllable free falling water drop fountain
US4910850A (en) * 1983-03-22 1990-03-27 Mitsubishi Rayon Company, Ltd. Method for coagulation of a polymer latex
US5229164A (en) * 1985-12-19 1993-07-20 Capsoid Pharma Gmbh Process for producing individually dosed administration forms
US5336467A (en) * 1989-11-22 1994-08-09 Vettest S.A. Chemical analyzer
US5250262A (en) * 1989-11-22 1993-10-05 Vettest S.A. Chemical analyzer
US5089229A (en) * 1989-11-22 1992-02-18 Vettest S.A. Chemical analyzer
US5340509A (en) * 1992-06-30 1994-08-23 Shell Oil Company Process for pelletizing ultra high melt flow crystalline polymers and products therefrom
US7273591B2 (en) 2003-08-12 2007-09-25 Idexx Laboratories, Inc. Slide cartridge and reagent test slides for use with a chemical analyzer, and chemical analyzer for same
US8287823B2 (en) 2003-08-12 2012-10-16 Idexx Laboratories, Inc. Slide cartridge and reagent test slides for use with a chemical analyzer, and chemical analyzer for same
US8585989B2 (en) 2003-12-04 2013-11-19 Idexx Laboratories, Inc. Retaining clip for reagent test slides
US9116129B2 (en) 2007-05-08 2015-08-25 Idexx Laboratories, Inc. Chemical analyzer
US9823109B2 (en) 2007-05-08 2017-11-21 Idexx Laboratories, Inc. Chemical analyzer
US20160242404A1 (en) * 2013-09-12 2016-08-25 Beijing Research Center For Information Technology In Agriculture Device and method for producing quantitative-diameter spray droplets of pesticide
US9907301B2 (en) * 2013-09-12 2018-03-06 Beijing Research Center For Information Technology In Agriculture Device and method for producing quantitative-diameter spray droplets of pesticide
US9797916B2 (en) 2014-01-10 2017-10-24 Idexx Laboratories, Inc. Chemical analyzer
CN109999718A (zh) * 2019-01-31 2019-07-12 En科技有限公司 液体球形颗粒制备装置和液体球形颗粒的制备方法
US11977091B2 (en) 2020-07-10 2024-05-07 Idexx Laboratories Inc. Point-of-care medical diagnostic analyzer and devices, systems, and methods for medical diagnostic analysis of samples

Also Published As

Publication number Publication date
NL299526A (fr)
DE1295531C2 (de) 1976-01-02
GB1055267A (en) 1967-01-18
DE1295531B (de) 1969-05-22

Similar Documents

Publication Publication Date Title
US3341087A (en) Method and apparatus for forming liquid drops
US4378335A (en) Device for producing a solid-forming or foaming flowable reaction mixture
US4043715A (en) Pumped injection of gas for making foamed plastic
US5624690A (en) Controlled release of metered quantities of finely divided solids with a venturi nozzle and regulated control
US3324510A (en) Arrangement for the production of granules from plastic material
US3218672A (en) Apparatus for production of hollow bodies from thermoplastic synthetic material
KR101187153B1 (ko) 액적조정방법, 액적토출방법 및 액적토출장치
US4490048A (en) Apparatus for producing a preferably chemically reactive mixture from two or more plastics components
US3301488A (en) Spray gun
KR840000896B1 (ko) 밸브장치
CN213433982U (zh) 一种立式搅拌乳化机
US2474136A (en) Packing of plastic material
US3981447A (en) Recirculatory apparatus for spraying mould parting agents and other substances
US2987082A (en) Rotary filling machine
US1852218A (en) Method of and apparatus for feeding molten glass
US3358329A (en) Extrusion apparatus and products therefrom
DE2754738C3 (de) Speicherkopf zum Herstellen eines schlauchförmigen Vorformlings aus thermoplastischem Kunststoff
US3854630A (en) Apparatus for injecting colorant into injection molding machine
DE2134207C2 (de) Füll- und Dosiergerät für zähflüssige und/oder fädenziehende Flüssigkeiten
DE69218216T2 (de) Schraubfoermiger glasausstosskolben
CN107568187B (zh) 一种用于植保领域的单液滴发生装置
CN216936696U (zh) 一种注塑机喷洒装置及使用其的注塑机
US4595565A (en) Equipment for mixing liquid reactants
SU1496834A1 (ru) Установка дл нанесени покрыти на внутреннюю поверхность изделий
US2800871A (en) Apparatus for helically striping an elongated cylindrical article