US20040060265A1 - Controlling the flow of a powder - Google Patents

Controlling the flow of a powder Download PDF

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Publication number
US20040060265A1
US20040060265A1 US10/609,132 US60913203A US2004060265A1 US 20040060265 A1 US20040060265 A1 US 20040060265A1 US 60913203 A US60913203 A US 60913203A US 2004060265 A1 US2004060265 A1 US 2004060265A1
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US
United States
Prior art keywords
powder
chamber
hopper
receptacle
outlet
Prior art date
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Abandoned
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US10/609,132
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English (en)
Inventor
Andrew Boeckle
Dale Ploeger
Derrick Parks
Diane Brannigan
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Novartis Pharma AG
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Nektar Therapeutics
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Publication date
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Priority to US10/609,132 priority Critical patent/US20040060265A1/en
Assigned to NEKTAR THERAPEUTICS reassignment NEKTAR THERAPEUTICS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRANNIGAN, DIANE, BOECKLE, ANDREW J., PARKS, DERRICK J., PLOEGER, DALE W.
Publication of US20040060265A1 publication Critical patent/US20040060265A1/en
Assigned to NOVARTIS PHARMA AG reassignment NOVARTIS PHARMA AG ASSIGNMENT OF PATENT RIGHTS Assignors: NEKTAR THERAPEUTICS
Abandoned legal-status Critical Current

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    • 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
    • B65B37/00—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged
    • B65B37/08—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged by rotary feeders
    • 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
    • B65B1/08—Methods of, or means for, filling the material into the containers or receptacles by vibratory feeders
    • 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
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/36—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods
    • B65B1/363—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods with measuring pockets moving in an endless path
    • B65B1/366—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by volumetric devices or methods with measuring pockets moving in an endless path about a horizontal axis of symmetry

Definitions

  • the present invention satisfies these needs.
  • the flow of powder from a hopper is controlled in an improved manner.
  • an apparatus for filling a chamber comprises a hopper adapted to contain a powder pharmaceutical formulation, the hopper comprising an outlet.
  • the apparatus also comprises a disturbance member capable of disturbing a medium within the hopper, the disturbance of the medium being sufficient to control the flow of powder through the outlet.
  • the chamber may be filled by powder flowing through the outlet and into the chamber.
  • an apparatus for filling a chamber comprises a hopper adapted to contain a powder pharmaceutical formulation, the hopper comprising an outlet.
  • the apparatus also comprises a vibratable member positioned in, on, or near the hopper so that the vibratable member is spaced from powder in the hopper, the vibratable member being capable of fluidizing the powder in the hopper.
  • the chamber may be filled with powder flowing through the outlet and into the chamber.
  • a method of filling a chamber comprises providing a powder pharmaceutical formulation in a hopper; disturbing a medium in the hopper to fluidize the powder; and passing the powder through an outlet and into the chamber.
  • a method of filling a chamber comprises providing a powder pharmaceutical formulation; vibrating a member spaced from the powder to fluidize the powder; and passing the powder through an outlet and into the chamber.
  • FIG. 1 is a schematic sectional side view of a powder filling apparatus of the invention
  • FIGS. 2A through 2C are schematic sectional side views of various receptacles that may be filled using the powder filling apparatus of the invention.
  • FIG. 5 is a schematic sectional side view of another version of a powder filling apparatus
  • FIGS. 6A and 6B are schematic sectional side views of the powder filling apparatus of FIG. 5 during a powder filling process
  • FIG. 7 is a schematic sectional front view of a multiple chamber powder filling apparatus
  • FIGS. 8A and 8B are schematic sectional front views of other versions of multiple chamber powder filling apparatus
  • FIG. 9 is a schematic cut-away view showing the interior of a version of a powder filling apparatus
  • FIG. 10 is a schematic sectional side view of a powder filling apparatus together with a bulk powder container.
  • FIG. 11 is a more detailed schematic sectional side view of a version of a powder filling apparatus with a bulk powder container.
  • the present invention relates to controlling the flow of a powder, such as by controlling the flow of powder during a package filling process.
  • a powder pharmaceutical formulation such as by controlling the flow of powder during a package filling process.
  • a powder filling apparatus 100 is shown schematically in FIG. 1.
  • the powder filling apparatus 100 comprises a hopper 105 having a reservoir 110 capable of containing a bed of powder 115 , such as a powder pharmaceutical formulation.
  • the hopper 105 which may be of any suitable size and shape, comprises an outlet 120 through which fluidized powder may flow.
  • a chamber 125 may be positioned in proximity to the outlet 120 so that powder flowing through the outlet 120 will flow into the chamber 125 to fill the chamber 125 .
  • a powder fluidizer 130 may be positioned in, on, or near the hopper 105 .
  • the powder fluidizer 130 comprises a disturbance member 135 that provides a disturbance within the hopper 105 .
  • the disturbance member 135 may be actuated by an actuator 140 to cause a disturbance within the hopper 105 to control the flow of powder 115 in the hopper 105 .
  • the disturbance member 135 may disturb a medium 145 , such as air or other gas, that is in the hopper 105 in such a manner that the disturbed medium 145 may cause fluidization of the powder 115 .
  • at least a portion of the disturbance member 135 may be positioned so that it is separated from the powder 115 by the medium 145 .
  • the powder fluidizer 130 may be used to control a powder filling process within the hopper 105 .
  • the powder fluidizer 130 may operate continuously or periodically in short intervals to maintain the powder 115 in a constantly fluidized state.
  • powder 115 may flow through the outlet 120 until the hopper 105 is empty or until the chamber 125 is filled.
  • the powder fluidizer 130 may control the timing of the flow of powder 115 and/or may control the amount of powder 115 that flows through the outlet 120 of the hopper 105 and into the chamber 125 .
  • the outlet 120 in the hopper 105 may be sufficiently small that undisturbed powder 115 does not flow through the outlet 120 or does not consistently flow through the outlet 120 .
  • the actuator 140 When it is desired for the powder 115 to flow into the chamber 125 , the actuator 140 causes the disturbance member 135 to disturb the medium 145 and thereby fluidize the powder 115 to allow the powder 115 to flow through the outlet 120 and into the chamber 125 .
  • the actuator 140 may cause the disturbance to stop or be reduced, thereby reducing the amount of powder 115 flowing through the outlet 120 , for example by terminating the flow of powder through the outlet 120 .
  • the powder fluidizer 130 provides a disturbance within the hopper 105 , and the disturbance comprises vibrations 150 .
  • the disturbance member 135 may comprise a vibratable object, such as a membrane 155 , within, on or near the hopper 105 , the membrane 155 being capable of vibrating when excited by the actuator 140 to produce vibrations.
  • the vibrating membrane 155 disturbs the medium 145 .
  • the portion of the medium 145 immediately in front is compressed causing a slight increase in pressure, it then moves back past its rest position and causes a reduction in the pressure.
  • the process may continue so that one or more waves of alternating high and low pressure are radiated away from the membrane 155 .
  • the waves contact the powder 115 and the resulting impact is sufficient to at least momentarily fluidize the powder 115 .
  • the frequency of the vibrations 150 may be selected to fluidize a particular powder 115 and/or to best suit a particular filling process.
  • the vibrations 150 may be in the audible range.
  • the membrane 155 may vibrate at a frequency in a non-audible range to lessen operator annoyance.
  • the vibration may be at any frequency, or multiple frequencies, that desirably fluidizes or otherwise controls the flow of the powder 115 . For example, in the version shown in FIG.
  • the membrane 155 may vibrate at one or more frequencies comprising a frequency of from about 10 Hz to about 1000 Hz, more preferably from about 90 Hz to about 500 Hz, more preferably from about 100 Hz to about 200 Hz, and most preferably at about 120 Hz.
  • the frequency may be selectable.
  • a particularly desirable frequency for a particular configuration and/or powder may be selected, such as a frequency that is determined through experimentation or analysis to cause a resonance within the hopper 105 .
  • the chamber 125 comprises an opening 160 positionable in relation to the outlet 120 in the hopper 105 to receive powder flowing from the hopper 105 through the outlet 120 .
  • the opening 160 into the chamber 125 is substantially the same shape and size and as the outlet 120 to prevent excessive amounts of powder 115 from getting trapped between the hopper 105 and a member 165 that contains or supports the chamber 125 .
  • the hopper 105 may comprise converging side walls 170 that provide a convergent flow path towards the outlet 120 for the powder 115 . The convergent flow path allows for increased reservoir volume in the hopper 105 .
  • the chamber opening 160 and the outlet 120 may be differently sized.
  • the outlet 120 may be smaller than the opening 160 when it is desirable to fill a relatively large chamber with a precisely controlled amount of powder 115 or when it is not desirable to provide a mechanism for precisely positioning the chamber 125 beneath the outlet 120 .
  • the opening 160 may be smaller than the outlet 120 when it is desirable to use the hopper 105 to fill varying sizes of chambers 125 or in situations where the loss of powder 115 to spaces between the hopper 105 and the member 165 is not of critical concern.
  • the chamber 125 may be within a receptacle 175 used to store the powder 115 .
  • the receptacle 175 may be in the form of primary or secondary packaging used to store a powder pharmaceutical formulation.
  • the receptacle 175 comprises a multi-layered package, conventionally referred to as a blister or blister pack, and the chamber 125 is within the multi-layered package.
  • powder 115 flows from the hopper 105 to a cavity 180 in a lower layer 185 of the multi-layered package.
  • An upper layer (not shown) may then be sealed onto the lower layer 185 , such as by heating and/or compressing the layers, to secure the powder within the cavity 180 , as described for example in U.S.
  • the multi-layered package may comprise a lower layer comprising a metal containing layer, such as a layer comprising aluminum, and/or an upper layer comprising a metal containing layer.
  • the metal containing layers may be sufficiently thick to substantially prevent a significant amount of moisture from passing therethrough.
  • the metal containing layers may be from about 10 ⁇ m to about 100 ⁇ m, and more preferably from about 20 ⁇ m to about 80 ⁇ m.
  • the receptacle 175 comprises a capsule, such as a capsule that is to be swallowed or from which the pharmaceutical formulation may be aerosolized, and the chamber 125 is within the capsule.
  • a first portion 190 of a capsule is positioned to receive powder flowing through the outlet 120 of the hopper. After filling, a second portion (not shown) may be placed over the first portion 190 to form the a capsule shape and to contain the powder within the capsule, as described in U.S. Pat. No. 4,247,066, U.S. Pat. No.
  • the chamber 125 may be within a container 195 , such as a bottle, vial or the like.
  • the container 195 may be use to contain multiple doses of a powder pharmaceutical formulation, such as a container described in U.S. Pat. No. 4,524,769 which is incorporated herein by reference in its entirety.
  • the chamber 125 may be a transfer chamber 200 that transfers powder that flows from the hopper 115 into the transfer chamber 200 to another chamber, such as a chamber within a package 175 .
  • the transfer chamber 200 may be provided in a movable member 205 .
  • the transfer chamber 200 receives powder from the hopper 115 when in a filling position as shown in FIG. 3.
  • the movable member 205 then transports the transfer chamber 200 to a position in proximity to the package 175 where at least a portion of the contents of the transfer chamber 200 may be emptied into the package 175 .
  • the transport chamber 200 may be sized so that it contains a predetermined amount of powder.
  • the transport chamber 200 may be sized to collect a dose of a powder pharmaceutical formulation, and the accurate dose may be delivered to the package 175 .
  • a doctor blade 210 may be provided to scrape off any excess powder in the transport chamber 200 .
  • a powder transfer assistance mechanism 215 is provided.
  • the powder transfer assistance mechanism 215 comprises a channel 220 in communication with the transfer chamber 200 .
  • the channel 200 is connectable to a source of suction when the transfer chamber 200 is in the powder collecting position shown in FIG. 4A.
  • suction 225 can be provided to the transfer chamber 200 to assist in collecting powder 115 within the transfer chamber 200 .
  • a filter 230 may be provided in the transfer chamber 200 to prevent powder 115 from being suctioned into the channel 200 .
  • the filter may comprise apertures having a diameter of from about 0.10 micrometers to about 0.65 micrometers, most preferably about 0.65 micrometers.
  • the channel 220 may be connectable to a source of pressurized gas to create pressure 235 within the channel 220 to cause the powder in the transfer chamber 200 to be ejected into the receptacle 175 .
  • a powder transfer assistance mechanism is described in U.S. Pat. No. 5,826,633, which is incorporated herein by reference in its entirety.
  • the powder filling apparatus 100 provides for an advantageous powder filling process.
  • One such advantage is that there is a reduction in the amount of physical contact between powder in the hopper 105 and other objects. This reduced contact can be useful in preventing undesirable conditions in the powder pharmaceutical formulation. For example, excessive physical contact can in some situations cause one or more of the following situations: formation of aggregates, increased electrostatic interactions, denaturation, and reduced aerosol performance. Though these undesirable effects have been prevented or compensated for in costly and encumbering manners, the reduction of the amount of direct physical contact provides a particularly simplified and useful alternative.
  • the powder filling apparatus 100 comprises a powder fluidizer 130 of the type discussed above in combination with an additional powder fluidizing member.
  • the powder filling apparatus may comprise a second powder fluidizer 240 .
  • the second powder fluidizer 240 comprises a powder fluidizing member 250 and an actuator 255 that drives the powder fluidizing member 250 to in a manner that fluidizes the powder 115 in the hopper 105 .
  • the powder fluidizing member 250 may be a member that directly contacts the powder 115 , and the movement of the fluidizing member 250 causes the powder 115 to fluidize.
  • the powder fluidizing member 250 comprises a rod 260 that extends downwardly into the bed of powder 115 .
  • a holding arm 265 holds the rod 260 in the hopper 105 .
  • the actuator 255 may be connected to drive the arm 265 to drive the rod 260 or may be connected directly to the rod 260 , such as by being connected between the rod 260 and the arm 265 .
  • the fluidization of powder in this manner is described in U.S. Pat. No. 6,182,712 which is incorporated herein by reference in its entirety.
  • the rod 260 may be caused to vibrate by the actuator 240 .
  • the rod may have a distal end that is positionable near the outlet 120 , and the actuator 240 may drive the rod in an up and down motion 270 to fluidize the powder to cause it to flow through the outlet 120 and into the chamber 125 .
  • the rod 260 may be attached to a motor, such as a piezoelectric motor, and is vibrated at a frequency of from about 1000 Hz to about 180,000 Hz, more preferably from about 10,000 Hz to about 40,000 Hz, and most preferably from about 15,000 Hz to about 25,000 Hz. Additionally or alternatively, the rod 260 may be vibrated or moved in another direction, such as laterally or rotationally.
  • the additional powder fluidizing member may comprise a stirrer or other fluidizing mechanism.
  • the powder fluidizer 130 and second powder fluidizer 240 may work in tandem or alone to fluidize powder 115 in the hopper 105 .
  • the powder fluidizer 130 may be actuated concurrently with the second powder fluidizer 240 to simultaneously generate vibrations 150 in the medium 145 and to directly vibrate 270 the powder 115 .
  • this combined action provides superior fluidization capabilities.
  • the powder fluidizer 130 and the second powder fluidizer 240 may be actuated at different times or actuated in a manner to supplement one another.
  • the powder fluidizer 130 may serve to supplement the action of the second powder fluidizer 240 .
  • FIG. 6A and 6B the powder fluidizer 130 may serve to supplement the action of the second powder fluidizer 240 .
  • the vibration of the rod 260 may be sufficient for a chamber 125 to be filled but may also result in the formation of one or more voids 275 in the area in proximity to the rod 260 .
  • the powder fluidizer 130 may be actuated, as shown in FIG. 6B.
  • the disturbance to the medium 145 is sufficient to cause the powder 115 to again contact the rod 260 so that the rod 260 may again be vibrated to fluidize the powder 115 .
  • the powder fluidizer 130 and/or the second powder fluidizer 240 may operate continuously to maintain the powder 115 in a continuously fluidized condition during the filling of multiple chambers 125 through the outlet 120 .
  • the powder fluidizer 130 and/or the second powder fluidizer 240 may operate only when it is desired to have the powder 115 fluidized, and the outlet 120 may be sized such that the powder does not substantially flow though the outlet 120 in the absence of such operation of the fluidizers.
  • the powder filling apparatus 100 is configured to simultaneously fill a plurality of chambers 125 .
  • the hopper 105 comprises a plurality of outlets 120 , such as two, three, four, or more.
  • the powder fluidizer 130 is positioned to fluidize the powder 115 in the hopper 105 across all of the outlets 120 .
  • the powder flowing through an outlet 120 passes into a transfer chamber 200 in a moveable member 205 , which in this version is a rotatable member.
  • the moveable member 205 When the transfer chamber 200 is filled, the moveable member 205 is rotated from the filling position shown in the figure to an ejecting position where the transfer chambers 200 are positioned above respective receptacles 175 .
  • the receptacles 175 are supported by a platform 300 .
  • the platform 300 may be moveable relative to the moveable member 205 so as to able to bring the receptacles 175 into the position shown in FIG. 7 and to take the receptacles 175 away after they are filled, at which time the transfer chambers 200 are moved back to their filling positions. This process may continue until a desired number of receptacles have been filled.
  • the platform 300 may be a moveable and indexable plate having openings for receiving receptacles.
  • the platform 300 may be a belt on a roller system.
  • FIGS. 8A and 8B show versions of a powder filling apparatus 100 capable of simultaneously filling a plurality of chambers 120 and comprising a powder fluidizer 130 and a second powder fluidizer 240 .
  • the second powder fluidizer 240 comprises a rod 260 that may be vibrated in an up and down direction 270 .
  • a mechanism is provided that allows the rod 260 to translate laterally 310 across each of the openings.
  • An exemplary translation mechanism is described in aforementioned U.S. Pat. No. 6,182,71.2 which is incorporated herein by reference, as discussed above.
  • a plurality of vibrating rods 260 are provided.
  • a rod 260 may be associated with a respective outlet 120 .
  • FIG. 9 A detailed view of an embodiment of a powder filling apparatus in accordance with the version of FIG. 8A is shown in FIG. 9.
  • a power fluidizer 130 and a second powder fluidizer 240 are used to control the flow of powder in the hopper through a plurality of outlets 120 .
  • the rod 260 of the second powder fluidizer is connected to a piezoelectric actuator or motor 320 to cause the rod 260 to vibrate up and down.
  • a mechanism, such as a screw drive, is provided within the arm 265 that causes the rod 260 to translate 310 across the hopper 105 .
  • a first enclosure 325 and a second enclosure 330 are provided to maintain desirable conditions within the powder filling apparatus 100 .
  • the enclosures may comprise, for example, a medical grade stainless steel, engineering polymer, PVC, or the like.
  • multiple powder fluidizers 130 may be provided within the second enclosure. This may be advantageous when very large hoppers 105 are utilized.
  • An inlet 335 through the enclosure 325 allows for the introduction of bulk powder into the hopper 105 .
  • the membrane 155 may be a portion of a speaker cone from a conventional audio speaker.
  • the speaker is connected to a function generator that can provide power and frequency ranges to the speaker through an amplifier. As the speaker cone vibrates, fluidizing sound is created.
  • the speaker cone may comprise, for example, a 3 inch woofer, a 4 inch woofer, a 6.5 inch woofer, or the like.
  • the powder fluidizer may comprise a membrane that is spaced from the speaker cone so that when the speaker cone vibrates, the membrane is caused to vibrate. This configuration may be useful in maintaining a controlled environment within the hopper 105 in that the speaker may be housed completely within the second enclosure 330 and is not directly exposed to the hopper 105 .
  • a bulk powder fluidizer 350 may be provided to fluidize bulk powder 355 contained in a bulk powder container 360 .
  • the bulk powder container 360 may be used to supply powder to the hopper 105 , as shown in FIG. 10.
  • the bulk powder container 360 comprises an outlet 365 that is in communication with the inlet 335 into the hopper 105 .
  • the bulk powder fluidizer 350 which may comprise a membrane 370 and actuator 375 similar to those described above, is actuated when it is desired to fluidize the bulk powder 355 to cause it to flow through the outlet 365 and into the hopper 105 .
  • This actuation may be continuous so that a small amount of powder is continuously being supplied to the hopper 105 at about the rate that powder is flowing through the one or more outlets 120 in the hopper 105 .
  • the actuation may be periodic.
  • the bulk powder fluidizer 350 may be actuated when the level of the powder in the hopper 105 falls below a predetermined level. This may involve manual actuation or a level sensor, such as a capacitive sensor, may be provided to allow for automatic refilling.
  • a gate or valve may also be provided near the inlet 335 .
  • the powder filling apparatus 100 of the present invention has also shown universal adaptability for filling various powders.
  • the powder filling apparatus 100 shown in present FIG. 11 with a transfer chamber as shown in FIGS. 4A and 4B was used for a comparison of different powders, and the results are shown in Table 2.
  • Six different powders were filled into unit dose receptacles.
  • the powders were of varying size, compositions, active agents, excipients, and properties. However, as can be seen from the data, very consistent filling was achieved with each of the powders. Very low RSD's were achieved for each of the powders.
  • the powder filling apparatus 100 demonstrated the ability to consistently fill both small and large doses into a receptacle.
  • a computer controller may be provided to control the actuation of the bulk powder fluidizer 350 and/or to control the actuation of the powder fluidizer 130 and/or the second powder fluidizer 240 .
  • the controller may control the operation of the entire powder filling apparatus 100 .
  • the controller may be a single controller device or may be a plurality of controller devices that may be connected to one another or a plurality of controller devices that may be connected to different components of the packaging apparatus 100 .
  • the controller comprises electronic hardware including electrical circuitry comprising integrated circuits that is suitable for operating or controlling the powder filling apparatus 100 .
  • the controller is adapted to accept data input, run algorithms, produce useful output signals, and may also be used to detect data signals from one or more sensors and other device components, and to monitor or control the process in the powder filling apparatus 100 .
  • the controller may merely perform one of these tasks.
  • the CPU often operates in conjunction with a random access memory (RAM), a read-only memory (ROM) and other storage devices well known in the art.
  • RAM random access memory
  • ROM read-only memory
  • the RAM can be used to store the software implementation of the present invention during process implementation.
  • the programs and subroutines of the present invention are typically stored in mass storage devices and are recalled for temporary storage in RAM when being executed by the CPU.
  • the controller may comprise a microprocessor or ASIC of sufficiently small size and power consumption to be housed on or in the powder filling apparatus 100 .
  • suitable microprocessors for use as a local microprocessor include the MC68HC711E9 by Motorola, the PIC16C74 by Microchip, and the 82930AX by Intel Corporation.
  • the microprocessor can include one microprocessor chip, multiple processors and/or co-processor chips, and/or digital signal processor (DSP) capability.
  • DSP digital signal processor
  • the powder filling apparatus 100 may be used to fill a pharmaceutical receptacle, such as a blister, capsule, vial, bottle, or the like, with a powder pharmaceutical formulation.
  • a powder pharmaceutical formulation such as a blister, capsule, vial, bottle, or the like
  • the powder filling apparatus 100 has proven to be particularly advantageous in filling dry powder inhaleable pharmaceutical formulations into receptacles from which the pharmaceutical formulation may be aerosolized for inhalation by a user.
  • the powder when in a powdered form, the powder may be initially stored in the sealed package, which is opened prior to aerosolization of the powder, as described in U.S. Pat. No. 5,785,049, U.S. Pat. No. 5,415,162, and U.S. patent application Ser. No. 09/583,312.
  • the powder may be contained in a capsule, as described in U.S. Pat. No. 4,995,385, U.S. Pat. No. 3,991,761, U.S. Pat. No. 6,230,707, and PCT Publication WO 97/27892, the capsule being openable before, during, or after insertion of the capsule into an aerosolization device.
  • the powder may be aerosolized by an active element, such as compressed air, as described in U.S. Pat. No. 5,458,135, U.S. Pat. No. 5,785,049, and U.S. Pat. No. 6,257,233, or propellant, as described in U.S. patent application Ser. No.
  • the pharmaceutical formulation may comprise an active agent.
  • the active agent described herein includes an agent, drug, compound, composition of matter or mixture thereof which provides some pharmacologic, often beneficial, effect. This includes foods, food supplements, nutrients, drugs, vaccines, vitamins, and other beneficial agents. As used herein, the terms further include any physiologically or pharmacologically active substance that produces a localized or systemic effect in a patient.
  • An active agent for incorporation in the pharmaceutical formulation described herein may be an inorganic or an organic compound, including, without limitation, drugs which act on: the peripheral nerves, adrenergic receptors, cholinergic receptors, the skeletal muscles, the cardiovascular system, smooth muscles, the blood circulatory system, synoptic sites, neuroeffector junctional sites, endocrine and hormone systems, the immunological system, the reproductive system, the skeletal system, pulmonary system, autacoid systems, the alimentary and excretory systems, the histamine system, and the central nervous system.
  • drugs which act on: the peripheral nerves, adrenergic receptors, cholinergic receptors, the skeletal muscles, the cardiovascular system, smooth muscles, the blood circulatory system, synoptic sites, neuroeffector junctional sites, endocrine and hormone systems, the immunological system, the reproductive system, the skeletal system, pulmonary system, autacoid systems, the alimentary and excretory systems, the histamine system, and the central nervous system.
  • Suitable active agents may be selected from, for example, hypnotics and sedatives, psychic energizers, tranquilizers, respiratory drugs, anticonvulsants, muscle relaxants, antiparkinson agents (dopamine antagnonists), analgesics, anti-inflammatories, antianxiety drugs (anxiolytics), appetite suppressants, antimigraine agents, muscle contractants, anti-infectives (antibiotics, antivirals, antifungals, vaccines) antiarthritics, antimalarials, antiemetics, anepileptics, bronchodilators, cytokines, growth factors, anti-cancer agents, antithrombotic agents, antihypertensives, cardiovascular drugs, antiarrhythmics, antioxicants, anti-asthma agents, hormonal agents including contraceptives, sympathomimetics, diuretics, lipid regulating agents, antiandrogenic agents, antiparasitics, anticoagulants, neoplastics, antineo
  • the active agent may fall into one of a number of structural classes, including but not limited to small molecules, peptides, polypeptides, proteins, polysaccharides, steroids, proteins capable of eliciting physiological effects, nucleotides, oligonucleotides, polynucleotides, fats, electrolytes, and the like.
  • active agents suitable for use in this invention include but are not limited to one or more of calcitonin, amphotericin B, erythropoietin (EPO), Factor VIII, Factor IX, ceredase, cerezyme, cyclosporin, granulocyte colony stimulating factor (GCSF), thrombopoietin (TPO), alpha-1 proteinase inhibitor, elcatonin, granulocyte macrophage colony stimulating factor (GMCSF), growth hormone, human growth hormone (HGH), growth hormone releasing hormone (GHRH), heparin, low molecular weight heparin (LMWH), interferon alpha, interferon beta, interferon gamma, interleukin-1 receptor, interleukin-2, interleukin-1 receptor antagonist, interleukin-3, interleukin-4, interleukin-6, luteinizing hormone releasing hormone (LHRH), factor IX, insulin, pro-insulin, insulin analogues
  • FSH follicle stimulating hormone
  • IGF insulin-like growth factor
  • Active agents for use in the invention further include nucleic acids, as bare nucleic acid molecules, vectors, associated viral particles, plasmid DNA or RNA or other nucleic acid constructions of a type suitable for transfection or transformation of cells, i.e., suitable for gene therapy including anti sense.
  • an active agent may comprise live attenuated or killed viruses suitable for use as vaccines.
  • Other useful drugs include those listed within the Physician's Desk Reference (most recent edition).
  • the amount of active agent in the pharmaceutical formulation will be that amount necessary to deliver a therapeutically effective amount of the active agent per unit dose to achieve the desired result. In practice, this will vary widely depending upon the Particular agent, its activity, the severity of the condition to be treated, the patient population, dosing requirements, and the desired therapeutic effect.
  • the composition will generally contain anywhere from about 1% by weight to about 99% by weight active agent, typically from about 2% to about 95% by weight active agent, and more typically from about 5% to 85% by weight active agent, and will also depend upon the relative amounts of additives contained in the composition.
  • compositions of the invention are particularly useful for active agents that are delivered in doses of from 0.001 mg/day to 100 mg/day, preferably in doses from 0.01 mg/day to 75 mg/day, and more preferably in doses from 0.10 mg/day to 50 mg/day. It is to be understood that more than one active agent may be incorporated into the formulations described herein and that the use of the term “agent” in no way excludes the use of two or more such agents.
  • the pharmaceutical formulation may comprise a pharmaceutically acceptable excipient or carrier which may be taken into the lungs with no significant adverse toxicological effects to the subject, and particularly to the lungs of the subject.
  • a pharmaceutical formulation may optionally include one or more pharmaceutical excipients which are suitable for pulmonary administration. These excipients, if present, are generally present in the composition in amounts ranging from about 0.01% to about 95% percent by weight, preferably from about 0.5 to about 80%, and more preferably from about 1 to about 60% by weight.
  • excipients will, in part, serve to further improve the features of the active agent composition, for example by providing more efficient and reproducible delivery of the active agent, improving the handling characteristics of powders, such as flowability and consistency, and/or facilitating manufacturing and filling of unit dosage forms.
  • excipient materials can often function to further improve the physical and chemical stability of the active agent, minimize the residual moisture content and hinder moisture uptake, and to enhance particle size, degree of aggregation, particle surface properties, such as rugosity, ease of inhalation, and the targeting of particles to the lung.
  • One or more excipients may also be provided to serve as bulking agents when it is desired to reduce the concentration of active agent in the formulation.
  • compositions and additives useful in the present pharmaceutical formulation include but are not limited to amino acids, peptides, proteins, non-biological polymers, biological polymers, carbohydrates, such as sugars, derivatized sugars such as alditols, aldonic acids, esterified sugars, and sugar polymers, which may be present singly or in combination.
  • Suitable excipients are those provided in WO 96/32096, which is incorporated herein by reference in its entirety.
  • the excipient may have a glass transition temperature (Tg) above about 35° C., preferably above about 40° C., more preferably above 45° C., most preferably above about 55° C.
  • Exemplary protein excipients include albumins such as human serum albumin (HSA), recombinant human albumin (rHA), gelatin, casein, hemoglobin, and the like.
  • Suitable amino acids (outside of the dileucyl-peptides of the invention), which may also function in a buffering capacity, include alanine, glycine, arginine, betaine, histidine, glutamic acid, aspartic acid, cysteine, lysine, leucine, isoleucine, valine, methionine, phenylalanine, aspartame, tyrosine, tryptophan, and the like.
  • Amino acids falling into this category include hydrophobic amino acids such as leucine, valine, isoleucine, tryptophan, alanine, methionine, phenylalanine, tyrosine, histidine, and proline.
  • Dispersibility-enhancing peptide excipients include dimers, trimers, tetramers, and pentamers comprising one or more hydrophobic amino acid components such as those described above.
  • Carbohydrate excipients suitable for use in the invention include, for example, monosaccharides such as fructose, maltose, galactose, glucose, D-mannose, sorbose, and the like; disaccharides, such as lactose, sucrose, trehalose, cellobiose, and the like; polysaccharides, such as raffinose, melezitose, maltodextrins, dextrans, starches, and the like; and alditols, such as mannitol, xylitol, maltitol, lactitol, xylitol sorbitol (glucitol), pyranosyl sorbitol, myoinositol and the like.
  • monosaccharides such as fructose, maltose, galactose, glucose, D-mannose, sorbose, and the like
  • disaccharides such as lac
  • the pharmaceutical formulation may also include polymeric excipients/additives, e.g., polyvinylpyrrolidones, derivatized celluloses such as hydroxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose, Ficolls (a polymeric sugar), hydroxyethylstarch, dextrates (e.g., cyclodextrins, such as 2-hydroxypropyl- ⁇ -cyclodextrin and sulfobutylether- ⁇ -cyclodextrin), polyethylene glycols, and pectin.
  • polymeric excipients/additives e.g., polyvinylpyrrolidones, derivatized celluloses such as hydroxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose, Ficolls (a polymeric sugar), hydroxyethylstarch, dextrates (e.g., cyclodextrins, such as 2-hydroxyprop
  • the pharmaceutical formulation may further include flavoring agents, taste-masking agents, inorganic salts (for example sodium chloride), antimicrobial agents (for example benzalkonium chloride), sweeteners, antioxidants, antistatic agents, surfactants (for example polysorbates such as “TWEEN 20” and “TWEEN 80”), sorbitan esters, lipids (for example phospholipids such as lecithin and other phosphatidylcholines, phosphatidylethanolamines), fatty acids and fatty esters, steroids (for example cholesterol), and chelating agents (for example EDTA, zinc and other such suitable cations).
  • inorganic salts for example sodium chloride
  • antimicrobial agents for example benzalkonium chloride
  • sweeteners for example polysorbates such as “TWEEN 20” and “TWEEN 80”
  • surfactants for example polysorbates such as “TWEEN 20” and “TWEEN 80”
  • sorbitan esters for example phospholipids such as lec
  • compositions according to the invention are listed in “Remington: The Science & Practice of Pharmacy”, 19 th ed., Williams & Williams, (1995), and in the “Physician's Desk Reference”, 52 nd ed., Medical Economics, Montvale, N.J. (1998), both of which are incorporated herein by reference in their entireties.
  • Mass median diameter is a measure of mean particle size, since the powders of the invention are generally polydisperse (i.e., consist of a range of particle sizes). MMD values as reported herein are determined by centrifugal sedimentation, although any number of commonly employed techniques can be used for measuring mean particle size.
  • Mass median aerodynamic diameter or “MMAD” is a measure of the aerodynamic size of a dispersed particle. The aerodynamic diameter is used to describe an aerosolized powder in terms of its settling behavior, and is the diameter of a unit density sphere having the same settling velocity, generally in air, as the particle. The aerodynamic diameter encompasses particle shape, density and physical size of a particle. As used herein, MMAD refers to the midpoint or median of the aerodynamic particle size distribution of an aerosolized powder determined by cascade impaction.

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WO2004002827A1 (en) 2004-01-08
KR101159838B1 (ko) 2012-06-26
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ES2391174T3 (es) 2012-11-22
AU2003258971A1 (en) 2004-01-19
CA2484950A1 (en) 2004-01-08
PT1515890E (pt) 2012-10-18
EP1515890B1 (en) 2012-07-11
JP2005530659A (ja) 2005-10-13
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EP1515890A1 (en) 2005-03-23
CA2484950C (en) 2011-05-24

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