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US3390648A - Procedure for coating particles - Google Patents

Procedure for coating particles Download PDF

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Publication number
US3390648A
US3390648A US396498A US39649864A US3390648A US 3390648 A US3390648 A US 3390648A US 396498 A US396498 A US 396498A US 39649864 A US39649864 A US 39649864A US 3390648 A US3390648 A US 3390648A
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United States
Prior art keywords
drum
tablets
particles
coating
revolving
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
US396498A
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English (en)
Inventor
Martin Frithjof
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.)
Wander AG
Original Assignee
Wander AG
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Filing date
Publication date
Application filed by Wander AG filed Critical Wander AG
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Publication of US3390648A publication Critical patent/US3390648A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/025—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk
    • B05B13/0257—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk in a moving container, e.g. a rotatable foraminous drum
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
    • A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
    • A23G3/02—Apparatus specially adapted for manufacture or treatment of sweetmeats or confectionery; Accessories therefor
    • A23G3/20—Apparatus for coating or filling sweetmeats or confectionery
    • A23G3/26—Apparatus for coating by tumbling with a liquid or powder, spraying device-associated, drum, rotating pan
    • 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
    • A61J3/005—Coating of tablets or the like

Definitions

  • the lacquer solution is poured or preferably sprayed on to the mass which is revolved in the conventional pan, whereby volatilization of the solvent can be aided by introducing heatf-or instance, by radiation or the blowing on of hot air-and sucking off the solvent vapours.
  • the unavoidable abrasion when a pan is used, batches of from to kg. and more being rolled around for hours, is far mode disadvantageous in the lacquering procedure, in which the coating is very thin.
  • this abrasion is to some extent desirable (in the initial stage because of the rounding-off of the edges of the cores, giving the coating a uniform thickness, and later because of the polishing effect), and there is no disadvantage, since because of the long duration of the process and the considerable thickness of the coating, the outer layers of the coating contain hardly any substance rubbed off the cores.
  • the danger of the film already formed being damaged increases with the weight of the load.
  • the invention presented here is based on the perception that both in lacquering in the pan or in the drum, as well as in the fluidized bed equipment, far too large batches of tablets are, or have to be handled.
  • the lacquering is done in a drum rotatin g round its horizontal axis.
  • this drum contains such a small batch of tablets that with the usual smooth nature of the inner surface of the drum there would be no revolving motion.
  • the inner surface of the drum must be such that the tablets slide much less well against it than among themselves.
  • the layer of the revolved tablet batch hereafter called the revolving layer-must in addition have a maximum height which lies between three times the smallest and ten times the largest diameter of the tablets.
  • the invention thus is concerned with a new procedure for coating particles, such as tablets of, for instance, bi-convex shape, and in particular those produced by the pharmaceutical industry, especially by spraying on a lacquer solution, which comprises revolving the particles while being coated in the interior of a drum rotating round its horizontal axis, the inner surface of the drum being of such a nature that the particles slide considerably better among themselves than against it, said particles forming a revolving layer occupying considerably less than of the internal volume of the drum, the maximum height of the revolving layer being between three times the smallest and ten times the largest diameter of the particles.
  • a lacquer solution which comprises revolving the particles while being coated in the interior of a drum rotating round its horizontal axis, the inner surface of the drum being of such a nature that the particles slide considerably better among themselves than against it, said particles forming a revolving layer occupying considerably less than of the internal volume of the drum, the maximum height of the revolving layer being between three times the smallest
  • the particles constituting the revolving layer resulting from the arrangement described must necessarily follow a movement which is characterized by two turning points with two accelerating stretches in between. From the lower turning point, roughly corresponding to the lowest point of the drum, the particles are conveyed in forward motion according to the rotating speed of the drums surface in a circular path to the upper turning point. From here, under the influence of gravity, they drop back to the lower point, sliding more or less straight over the particles conveyed upwards. Since the acceleration in the field of gravity is independent of weight, the dynamics of the revolving layer is largely independent of the size and weight of the particles.
  • the adhesion of the particles to the inner surface of the drum which is necessary in the new procedure, can be achieved, for instance, by cladding the surface with a profiled rubber lining or something similar.
  • the essential point is that the particles resting on the surface and those immediately next to them are drawn along by the ascending drum wall, so that the desired revolving motion can actually develop and that the load in its entirety does not slide down along the ascending drum surface, as would be the case with the thin layer of our invention, if not special measures were taken to increase adhesion.
  • the lacquer solution is sprayed on, and this can be accompanied by direct heating by means of radiation or adduction of hot air. Because all the particles must of necessity pass regularly under the spray, the coating is extremely regular, with minimum deviations from the standard value and without being affected by abrasion of the cores or damage to the coating, because the revolving layer is not very high. As the thickness of the coating depends very closely on both the apparatus factors and the duration of the operation, films of a thickness of, if desired, about 10 cm. can be formed with a high degree of accuracy and without any danger of bare spots.
  • the coating operation is completed within a few minutes because of this and also as a result of the extremely favourable ratio, for every single particle, between spraying time and idle time, i.e. the time during which no spraying is done. This is why, with a comparable amount of equipment, and despite relatively small batches, production is much greater with the device developed by me than with the traditional pans, drums or fluidized equipments.
  • the inner surface of the drum is suitably sub-divided by means of circular ribs or lamellae into channels, the width of which is from three to ten times the maximum diameter of the particles. It is even more advantageous if these ribs are inter-connected to form a helical track, so that the particles being coated are moved axially on this track through the rotating drum.
  • My process can be carried out either by feeding one batch at a time, or continuously. In the former case, one or several circular tracks on the inner surface of the drum will suffice.
  • One way of taking the particles out is by inserting after the coating is finished specially-fitting collectors in the tracks ahead of the lower turning point and allowing these to be taken up to the upper point. In this way, the particles are caught by the container instead of returning to the lower turning .point.
  • New particles can be loaded by inserting similar containers holding the desired batch, which can be dropped into the rotating track by inserting containers holding the desired batch with said containers being open at the back side thereof with respect to the direction of rotation of the drum, and by allowing the containers to be moved within the drum from the lowest point therein to the upper turning point.
  • Both operations can be carried out without stopping the drum, in one single operation which can be made automatic.
  • Other methods of loading and unloading will be evident to the specialistfor instance through openings in the drum surface which can be closed by sliders, by conveyer belts, silo-like storage containers, and similar devices.
  • the track of the revolving layer on the inner wall of the drum is of the helical type
  • loading need only be done at the beginning of the helical track, and this can be done either batchwise (one per revolution of the drum), or continuously.
  • the first helical revolution collects the batch, which is conveyed axially through the drum; in order to prevent disparities, spraying should in this case be done only from the second turn of the helix onwards.
  • spraying should in this case be done only from the second turn of the helix onwards.
  • the operating time is determined by the characteristics of the apparatus. This time can however be varied by loading the particles in a later turn instead of in the first one.
  • the rotary speed of the drum and the intensity of the spraying are variable within certain limits. These values have however certain optima which can be determined empirically and depend on the particles and coating solutions used, and there should be no great deviations from these optima. There is also an optimum for the quantity of particles which can be treated in one turn of the track on the interior surface of the drum. Obviously, revolving layers which are too large and particularly too high would partially cancel out the advantages sought by my process.
  • the maximum height of the revolving layer must be inferior to ten times the largest diameter of the particles; however it may not be inferior to three times the smallest diameter of the particles because otherwise an actual revolution of the layer would no longer be assured.
  • batches of from to 1000 grams are preferred in the lacquering technique in accordance with the invention.
  • the well-known mixing jets can advantageously be used, it being possible to vary the air pressure and the supply of solution.
  • the airstream conveying the solution possesses a remarkable jet pressure which, though as with nearly all spraying systems (except for electrostatic ones) causes substance to be lost, offers considerable advantages.
  • the air streaming in with particles of solution at the same time removes any dust which may be adhering to the tablets, so that no foreign substances can penetrate the film.
  • there is a physical-mechanical film formation which also produces adherent films on apparently smooth non-porous tablet surfaces.
  • the paper mentioned earlier and certain references quoted in it contain many suggestions as to the composition of the spray solutions.
  • consideration can also be given to aqueous solutions as well as aqueous and nonaqueous suspensions of substances which are preferably film-forming.
  • FIG. 1 is a schematic diagram, partly sectional, of the equipment for continuous working
  • FIG. 1A is a fragmentary schematic diagram, partially sectional, of a modified form of the equipment for coating tablets or other particles;
  • FIG. 2 is a perspective view, showing a section of the interior of the drum in which the tablets or other particles are coated;
  • FIG. 3 is a schematic presentation of the revolving layer in the cross-sectioned drum.
  • a horizontally-positioned drum 1 rests at both ends on pairs of rollers 2 which turn in bearings 3 mounted on a base 4.
  • One or more of these rollers can be set turning by means of an electromotor 5 to rotate the drum 1 slowly and regularly.
  • On the inner surface of the drum and at right angles to its axis is a continuous helicoidal rib or lamella 6 broadened at its base to form a helical groove 7 which in cross-section has a concave bottom lined with profiled rubber 8.
  • the tablet batches 9 which when the drum 1 rotates take the shape and dynamics of a revolving layer with a lower turning point 10, an upper turning point 1 1, a forward acceleration stretch 12 and a backward acceleration stretch 13.
  • sprayers 14 Arranged along the interior of the drum 1 are several sprayers 14 aimed at the backward acceleration stretch 13 of the revolving layers formed by the tablet batches 9. These sprayers are connected to a common compressed-air duct 15 and to individual solution supply ducts 16 fed from a container 17 (or fed individually or in groups from several such containers). This container is put under pressure by means of a compressed-air duct 18 which also feeds the duct 15, and during filling the air can be let out by opening a valve 19. In the ducts 15, 16 and 118 there are regulating valves 20 as Well as pressuregauges, flow meters etc.
  • Numeral 24 represents a device for feeding tablets to the one end of the helical groove 7, and numeral 25 represents a device for removing the coated tablets.
  • the tablet feeding device 24 can be a simple mechanical means for discharging at regular intervals into the grooves 7 a weighed amount of the tablets or, if preferred, a continuous stream of tablets can be fed to the groove 7 by means of a vibratory feed means.
  • the coated tablets can be removed from the drum in the manner described heretofore.
  • the modified form of the coating equipment illustrated in FIG. 1A comprises a horizontally positioned drum 1a supported at opposite ends on pairs of rollers 2a which turn in bearings 3a mounted on a base 4a.
  • An electromotor 5a turns one or more of the rollers 4a.
  • On the inner surface of the drum 1a and at right angles to the axis thereof are a plurality of spaced circular ribs or lamellae 6a defining therebetween circular grooves 7a which in cross section have a concave bottom and which preferalbly are lined with profiled rubber to provide an interior friction surface.
  • Several sprayers 14a are similarly arranged within drum 1a.
  • a small quantity of the cores to be coated is fed continuously or at intervals into the slowly rotating drum 1 by the device 24. These quantities move from one end of the drum to the other through the drums rotation and the force of gravity, and are thereby coated in the way already described.
  • Each quantity of tablets 9 contained in a lower section of the helical groove 7 goes through a revolving motion, the tablets lying on the surface of the revolving layer being especially exposed to the spray from the nozzles 14. The particles sprayed on dry almost immediately with the aid of the hot air blown on to them.
  • Length cm 140 Diameter cm Revolution speed of the drum revs. per minute 5 Width of the helical groove 7 cm 3.5 Height of the helical groove 7 cm 6 Number of turns of the helical groove 7 35 Hot air directed on the upper turning point 11 of the tablets C About 40-60 Quantity of tablets fed per drum revolution g About 300 Weight of a single bi-convex tablet g 0.5 Maximum diameter of a tablet cm 1.1 Minimum diameter of a tablet "cm-.. 0.6 Maximum height of the revolving layer cm 4 to 5 This gives for travelling through the 35 turns of the helical groove 7 an operating time of seven minutes and a capacity of 1.5 kg. of tablets per minute or kg. of tablets per hour.
  • the spray jets may be in the form of mixing jets or compressed solution jets. If desired, using the continuous process, coatings of various kinds can be applied successively through different sprayers in the same operation.
  • radiant heat drying can also be used. Hot air can be blown onto the rotating layer of tablets, either against or in the same direction.
  • the tablets can be fed in measured quantities by simple mechanical means, by a controlled vibrator or similar means.
  • the process can also be carried out in a vacuum in order to speed up the drying of the solution.
  • the procedure described here permits the continuous lacquering of tablets by means of a relatively simple and extremely efficient device, without requiring qualified staff, or even completely automatically.
  • the thickness of the coating can be pro-determined with great accuracy. Even with extremely thin coatings which allow dividing grooves and recessed identifying markings on the surface of the tablets to remain, there are no bare spots.
  • the process is chiefly suitable for covering particles produced by the pharmaceutical industry, such as pills, tablets of various shapes and sizes, capsules and so on, with a coating which gives the core beneath it protection, improved taste, more attractive appearance, resistance to the gastric juices and other advantages. It can however also be used for other purposes, where particles in large quantities have to be provided reliably and accurately with a thin covering film.
  • Procedure for coating particles such as tablets of bi-convex shape produced by the pharmaceutical industry, which comprises:
  • Procedure according to claim 1 characterized by the fact that the interior surface of the drum is sub-divided by ribs or lamellae into circular tracks, the Width of which corresponds to from three times to ten times the largest diameter of the particles.
  • Procedure according to claim 1 characterized by the References Cited UNITED STATES PATENTS 2,736,288 2/1956 Clay et al. 11819 3,141,792 7/1964 Lachman et al. 118-l9 X FOREIGN PATENTS 476,261 12/ 1937 Great Britain.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Medicinal Preparation (AREA)
  • Glanulating (AREA)
  • Nozzles (AREA)
US396498A 1963-09-19 1964-09-15 Procedure for coating particles Expired - Lifetime US3390648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1159763A CH428094A (de) 1963-09-19 1963-09-19 Vorrichtung zum Überziehen von Formlingen mit einem Deckbelag

Publications (1)

Publication Number Publication Date
US3390648A true US3390648A (en) 1968-07-02

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US396498A Expired - Lifetime US3390648A (en) 1963-09-19 1964-09-15 Procedure for coating particles
US606814A Expired - Lifetime US3451375A (en) 1963-09-19 1967-01-03 Rotating drum coating apparatus

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Application Number Title Priority Date Filing Date
US606814A Expired - Lifetime US3451375A (en) 1963-09-19 1967-01-03 Rotating drum coating apparatus

Country Status (7)

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US (2) US3390648A (de)
BE (1) BE653342A (de)
CH (1) CH428094A (de)
DE (1) DE1274475B (de)
GB (1) GB1057686A (de)
NL (1) NL6410854A (de)
SE (1) SE305717B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473490A (en) * 1966-01-17 1969-10-21 Camillo Corvi Mora Producing chronoactive pharmaceutical granules
US3841262A (en) * 1970-06-18 1974-10-15 Boehringer Mannheim Gmbh Apparatus for coating tablets
US3991225A (en) * 1974-02-01 1976-11-09 Tennessee Valley Authority Method for applying coatings to solid particles
US4118522A (en) * 1973-04-19 1978-10-03 Bruno Stellmach Method and device for the coating of tablets
US4133290A (en) * 1976-04-01 1979-01-09 Guido W. Melliger Tablet coating apparatus with weight monitoring
US4168919A (en) * 1977-10-31 1979-09-25 The Celotex Corporation Fiber plus liquid spray means in tumbling drum
US4325849A (en) * 1977-10-31 1982-04-20 The Celotex Corporation Method for making a slurry containing particulate matter and fibers for a preformed insulation product
US4572845A (en) * 1983-07-05 1986-02-25 Draiswerke Gmbh Process for gluing wood chips and the like with liquid glue and apparatus for performing the process
EP0185316A3 (en) * 1984-12-13 1987-05-13 Driam Metallprodukt Gmbh & Co. Kg Dragee cooking drum with spray device
EP0212824A3 (de) * 1985-07-10 1987-05-20 NABISCO BRANDS, Inc. Vorrichtung zum kontinuierlichen Überziehen mit Dragiertrommel
US4909181A (en) * 1988-10-18 1990-03-20 W. Wrigley Jr. Company Fluid distribution bar
US6680031B2 (en) * 1998-12-22 2004-01-20 Genencor International, Inc. Spray gun with a plurality of single nozzles for a fluid bed processing system and method thereof
US20070275163A1 (en) * 2003-08-01 2007-11-29 Driam Analgenbau Gmbh Method and Device for the Continuous Coating of Cores by Means of a Dragee-Making Apparatus
US20090220676A1 (en) * 2005-05-03 2009-09-03 Guenter Koerblein Multi-stage coating device for moulded bodies

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5436501B1 (de) * 1977-06-22 1979-11-09
DE3750769T2 (de) * 1986-07-24 1995-05-24 British Tech Group Methode zum Vorbereiten von Samen.
US5119589A (en) * 1986-07-24 1992-06-09 National Research Development Corporation Methods of priming seed
DE4305713A1 (de) * 1993-02-25 1994-09-01 Hoechst Ag Verfahren und Vorrichtung zur gleichmäßigen Verteilung einer kleinen Menge Flüssigkeit auf Schüttgütern
US5495418A (en) * 1993-06-18 1996-02-27 Latini Machine Company Automatic panning system
US20030165614A1 (en) * 2002-03-01 2003-09-04 Henrik Hansen Coating a medical implant using a pan coater
DE102005010005A1 (de) 2005-03-04 2006-12-28 Nunner, Dieter Vorrichtung und Verfahren zur Beschichtung von Kleinteilen
US20110081415A1 (en) * 2005-03-10 2011-04-07 Taisho Pharmaceutical Co., Ltd Coating apparatus
DE102005019443B4 (de) * 2005-04-21 2007-08-16 Glatt Maschinen- Und Apparatebau Ag Trommel zum Beschichten von körnigen Substraten
DE102005039875C5 (de) * 2005-08-23 2010-02-25 Klaus-Peter König Beschichtungsvorrichtung zur Beschichtung von Kleinteilen
CN101733237B (zh) * 2008-11-05 2012-07-25 中国航空工业标准件制造有限责任公司 干膜润滑剂的涂覆方法和设备
IT1392568B1 (it) * 2008-12-24 2012-03-09 Soremartec Sa Metodo e macchina per il rivestimento in continuo di anime di prodotti, in particolare, prodotti dolciari
CN103949377A (zh) * 2014-04-02 2014-07-30 安徽瑞田机械有限公司 一种储气罐内表面喷涂加工装置

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB476261A (en) * 1936-06-10 1937-12-06 John Hounsell Engineers Ltd Improvements relating to the coating of sweets and like products with sugar, flour or like material
US2736288A (en) * 1954-05-28 1956-02-28 Smith Kline French Lab Automatic tablet coating apparatus
US3141792A (en) * 1961-09-10 1964-07-21 Ciba Geigy Corp Automatic tablet coating apparatus

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US901455A (en) * 1907-01-18 1908-10-20 Frank Lauhoff Coated flakes.
US1910536A (en) * 1931-01-12 1933-05-23 Baker Perkins Co Inc Sugar sanding machine
US2298016A (en) * 1941-03-29 1942-10-06 Allis Chalmers Mfg Co Rotary scrubber and method of scrubbing ore
US2560820A (en) * 1948-08-26 1951-07-17 Kenneth H Recker Method for wax coating beans and carrots
US2994165A (en) * 1959-02-06 1961-08-01 Purex Corp Ltd Equipment and process for deburring and burnishing metal parts
US3095326A (en) * 1960-02-19 1963-06-25 Gen Foods Corp Batch-type apparatus for tumble coating discrete particles
US3167035A (en) * 1960-09-01 1965-01-26 Gen Mills Inc Continuous enrobing machine
NL121210C (de) * 1961-05-01
US3138368A (en) * 1961-06-15 1964-06-23 Pittsburgh Plate Glass Co Forming castings
US3172644A (en) * 1963-03-12 1965-03-09 Dean F Smith Rotary tumbler and method for making same
US3285223A (en) * 1963-12-09 1966-11-15 Archer Daniels Midland Co Apparatus for coating granules

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB476261A (en) * 1936-06-10 1937-12-06 John Hounsell Engineers Ltd Improvements relating to the coating of sweets and like products with sugar, flour or like material
US2736288A (en) * 1954-05-28 1956-02-28 Smith Kline French Lab Automatic tablet coating apparatus
US3141792A (en) * 1961-09-10 1964-07-21 Ciba Geigy Corp Automatic tablet coating apparatus

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473490A (en) * 1966-01-17 1969-10-21 Camillo Corvi Mora Producing chronoactive pharmaceutical granules
US3841262A (en) * 1970-06-18 1974-10-15 Boehringer Mannheim Gmbh Apparatus for coating tablets
US4118522A (en) * 1973-04-19 1978-10-03 Bruno Stellmach Method and device for the coating of tablets
US3991225A (en) * 1974-02-01 1976-11-09 Tennessee Valley Authority Method for applying coatings to solid particles
US4133290A (en) * 1976-04-01 1979-01-09 Guido W. Melliger Tablet coating apparatus with weight monitoring
US4168919A (en) * 1977-10-31 1979-09-25 The Celotex Corporation Fiber plus liquid spray means in tumbling drum
US4325849A (en) * 1977-10-31 1982-04-20 The Celotex Corporation Method for making a slurry containing particulate matter and fibers for a preformed insulation product
US4862826A (en) * 1983-07-05 1989-09-05 Draiswerke Gmbh Process for gluing wood chips and the like with liquid glue and apparatus for performing the process
US4572845A (en) * 1983-07-05 1986-02-25 Draiswerke Gmbh Process for gluing wood chips and the like with liquid glue and apparatus for performing the process
EP0185316A3 (en) * 1984-12-13 1987-05-13 Driam Metallprodukt Gmbh & Co. Kg Dragee cooking drum with spray device
EP0212824A3 (de) * 1985-07-10 1987-05-20 NABISCO BRANDS, Inc. Vorrichtung zum kontinuierlichen Überziehen mit Dragiertrommel
US5010838A (en) * 1985-07-10 1991-04-30 Nabisco Brands, Inc. Apparatus for continuous pan coating
US4909181A (en) * 1988-10-18 1990-03-20 W. Wrigley Jr. Company Fluid distribution bar
US6680031B2 (en) * 1998-12-22 2004-01-20 Genencor International, Inc. Spray gun with a plurality of single nozzles for a fluid bed processing system and method thereof
US20070275163A1 (en) * 2003-08-01 2007-11-29 Driam Analgenbau Gmbh Method and Device for the Continuous Coating of Cores by Means of a Dragee-Making Apparatus
US7955643B2 (en) 2003-08-01 2011-06-07 Driam Anlagenbau Gmbh Method and device for the continuous coating of cores by means of a dragée-making apparatus
US8662007B2 (en) 2003-08-01 2014-03-04 Driam Anlagenbau Gmbh Method and device for the continuous coating of cores by means of a dragee making apparatus
US20090220676A1 (en) * 2005-05-03 2009-09-03 Guenter Koerblein Multi-stage coating device for moulded bodies

Also Published As

Publication number Publication date
BE653342A (de) 1965-03-22
US3451375A (en) 1969-06-24
CH428094A (de) 1967-01-15
GB1057686A (en) 1967-02-08
SE305717B (de) 1968-11-04
DE1274475B (de) 1968-08-01
NL6410854A (de) 1965-03-22

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