WO1994007404A1 - Appareil de depoussierage en cascade - Google Patents

Appareil de depoussierage en cascade Download PDF

Info

Publication number
WO1994007404A1
WO1994007404A1 PCT/US1993/009319 US9309319W WO9407404A1 WO 1994007404 A1 WO1994007404 A1 WO 1994007404A1 US 9309319 W US9309319 W US 9309319W WO 9407404 A1 WO9407404 A1 WO 9407404A1
Authority
WO
WIPO (PCT)
Prior art keywords
tablets
dedusted
housing
discharge
screen member
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.)
Ceased
Application number
PCT/US1993/009319
Other languages
English (en)
Inventor
Richard Tarnopolski
Gregory E. Reaves
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.)
Merck and Co Inc
Original Assignee
Merck and Co Inc
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 Merck and Co Inc filed Critical Merck and Co Inc
Priority to AU51429/93A priority Critical patent/AU5142993A/en
Publication of WO1994007404A1 publication Critical patent/WO1994007404A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • 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
    • A61J3/10—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of compressed tablets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0082—Dust eliminating means; Mould or press ram cleaning means

Definitions

  • Typical, commercially available tabletting and dedusting apparatus employed fo ⁇ * tfces « purposes are the "Hata” supplied by Elizabeth-Hata International, Inc. and the “Fette P3100” supplied by ilhelm Fette GMBH. These apparatus also include computerized systems that count the number of dedusted tablets to prevent overfilling the receptacles in which the dedusted tablets are deposited.
  • These commercial dedusting apparatus dedust the tablets by means of a housing enclosing a horizontally disposed, hollow cylindrical screen drum equipped with an internal, co-axially aligned worm conveyor seated therein. Compressed tablets from a tabletting machine are fed into one end of the drum and the drum is activated rotate. As the drum rotates, the tablets are caused to vigorously tumble as they are transported by the worm conveyor to the discharge end of the drum where they are deposited into a suitable receptacle. Dust removed from the tablets is withdrawn from the housing by suitable vacuum means.
  • the cascade dedusting apparatus of the invention comprises a generally elongated rectangular housing having opposed side walls and opposed end walls, one of said end walls being at the supply end and the other end wall being at the discharge end of the apparatus; a cascade screen member seated within the opposed end walls and opposed side walls and inclined rom the supply «nd toward the discharge end, the cascade screen member consisting of a plurality of screen sections, each section being disposed horizontally higher than a succeeding section from the supply end toward the discharge end; a floor beneath the screen member secured to the opposed side walls; a plurality of discharge tubes at the discharge end of the deduster apparatus, each of the tubes communicating with the interior of the deduster; and, vacuum means intermediate the opposed end walls communicating with the interior of the deduster apparatus.
  • the cascade deduster apparatus of the invention is provided with a diverter wall disposed between the opposed end walls to substantially divide the cascade screen member longitudinally in half; gate means to close off pre-selected discharge ports; and, sensoring means to prevent overfilling of the receptacles receiving dedusted tablets in the event of malfunctions.
  • Tablets fed to the cascade deduster apparatus of the invention are gently tumbled along the cascade screen member toward the discharge end of the apparatus removing dust from the tablets.
  • the removed dust falls through the cascade screen member onto the floor and is constantly withdrawn from the apparatus by the vacuum means.
  • the dedusted tablets are directed through the discharge tubes into a plurality of receptacles.
  • the gate means By using the gate means, the dedusted tablets can be directed to pre- ⁇ elected discharge tubes enabling their associated receptacles to be filled successively or sequent ,illy.
  • Employing the sensoring means safeguards against overfilling the receptacles should a malfunction occur.
  • the cascade deduster apparatus of the invention is simple to use and economic to manufacture.
  • use of this apparatus minimizes and virtually eliminates tablet breakage and minimizes operator supervision and maintenance.
  • the apparatus permits increased productivity and greater flexibility since filling the plurality of receptacles can be controlled thereby enabling tablets to be dedusted continuously for prolonged periods of time.
  • Figure 1 is a perspective view of the cascade deduster apparatus of the invention
  • Figure 2 is a top plan view of the apparatus shown in Figure 1;
  • Figure 3 is a view taken substantially on the line 3-3 of Figure 2;
  • Figure 4 is an elevation and partial diagrammatic view of a gate means that can be used with the deduster apparatus of the invention.
  • the cascade deduster apparatus of the invention generally identified by reference numeral 10, having opposed side walls 11, 12, opposed end walls 13, 14 and a central diverter wall 15 which divides the deduster apparatus substantially in half lengthwise.
  • an inclined cascade screen member 16 Seated within side walls 11, 12 and end walls 13, 14 is an inclined cascade screen member 16 consisting of a plurality of sections such as 16a-16e, each section being horizontally higher than a succeeding section as one progresses from end wall 13 to end wall 14 to form a cascade screen.
  • the mesh size of screen 16 is not critical but should not be so large as to enable compressed tablets to pass through it nor so small as to become clogged with removed dust during dedusting operations.
  • a screen having a mesh size in the range of from about 0.050 to about 0.095 is suitable.
  • a stainless steel type 304 wire cloth (0.023 wire; 12 x 12 mesh) having a wire opening of 0.060.
  • Beneath screen 16 is a floor 17 secured to side walls 11, 12 which extends from end wall 13 to terminate at a point intermediate the dust removal conduct 18 and the first discharge tubes 21, 26 as indicated at 17a ( Figure 3) and which receives the dust from the dedusted tablets.
  • a dust removal conduit 18 ( Figures 2 and 3) preferably in the form of a tube, through which the dust from dedusted tablets is removed.
  • floor 17 is pitched at an angle from end wall 13 toward dust removal conduit 18 to facilitate removal of the dust.
  • Removal conduit 18 is connected to a suitable vacuum means (not shown) so that the dust is constantly removed as the tablets are dedusted.
  • end wall 13 is at the supply end of the deduster apparatus and tablets to be dedusted are supplied to the deduster apparatus from a conventional tabletting apparatus (not shown) such as by means of supply tubes 19 and 20. Since most conventional tabletting machines are now provided as dual tabletting machines, two such supply tubes are indicated although single tabletting machines are still currently being used.
  • Opposed end wall 14 is at the discharge end of the dedusting apparatus and intermediate end wall 14 and the end 17a of floor 17 there are provided a plurality of discharge conduits or tubes 21, 22, 23, 24, 25 and 26 through which dedusted tablets are removed from the deduster.
  • the upper ends, of each of the discharge tubes 21-26 communicates with the interior of the apparatus to receive the dedusted tablets and deliver them to suitable receptacles such as drums as indicated at 27 in Figure 3.
  • FIG 3 there is also shown a suitable support 28 for the deduster apparatus which is preferably of the type that can be vertically raised and lowered so that the deduster apparatus can be properly positioned adjacent discharge tubes 19, 20 of tabletting apparatus.
  • a pair of gates 29 and 30 are provided transverse to the longitudinal axis of the deduster 10 and are positioned to control the flow of dedusted tablets through discharge tubes 21-26 so that when drums 27 have received a predetermined number of dedusted tablets from discharge tubes 21-26, one of the gates 29 or 30 is closed to shut off the flow of dedusted tablets to pre-selected discharge tubes.
  • a conventional tablet counter as indicated at 31 ( Figure 2) connected to a conventional computerized sensing device (not shown) which, in turn, is connected to solenoid switches 32, 33 ( Figure 2).
  • the computerized sensing device When the computerized sensing device receives a signal from the tablet counter 31 that a pre-determined number of dedusted tablets has passed through a pair of discharge tubes 21-26, it activates one of the solenoid switches 32 or 33 which, in turn, actuate a gate 29 or 30 to its closed position and shut off the flow of dedusted tablets to that pair of discharge tubes 21-26.
  • the computerized sensing device also serves to stop the tabletting machine if the solenoid switches 32 and/or 33 malfuntion and fail to open or close the gates in proper sequence.
  • gate 29 would be actuated to shut off the flow of dedusted tablets to discharge tubes 21, 26 and gate 30 would be actuated to shut off the flow of dedusted tablets to discharge tubes 22, 25 and discharge tubes 23, 24.
  • a typical discharge sequence would be through discharge tubes 24, 25, 26 for one side and through discharge tubes 21, 22, 23 for the other side.
  • gate 29 is rotably secured beneath cascade screen section 16c by means of axle 29a pinned to side wall 11 shown by dot-dash lines.
  • spring arm 34 Spaced from gate 29 is spring arm 34 which is also rotatably secured beneath floor 17 by means of spring arm pin 34a.
  • spring 35 Disposed between gate 29 and spring arm 34 is a spring 35 which is biased against gate 29 to retain gate 29 in a normally open position as indicated by the solid lines.
  • Spring arm 34 is also connected to solenoid switch 32 by conventional means as indicated by 32a.
  • solenoid switch 32 sends a signal to spring arm 34 through connecting means 32a, spring arm 34 is actuated to rotate to its dashed line position enabling gate 29 to also rotate to its dashed line position and seal off cascade screen section 16c thereby stopping the flow of dedusted tablets to discharge tubes 21 and 26.
  • the cascade deduster apparatus of the invention is positioned to receive tablets from a conventional tabletting machine through supply tubes 19 and 20 ( Figures 1 and 2). As the tablets are delivered from supply tubes 19 and 20, they are kept separated by means of diverter wall 15. The force with which tablets are discharged through supply tubes 19 and 20 from the tabletting machines coupled with the inclined pitch of screen member 16 and the cascade effect created by screen sections 16a-16e, causes the tablets to gently tumble along screen member 16 toward discharge tubes 21-26. This tumbling action created by the cascade effect of the screen sections effectively dedusts the tablets and, since the tumbling action is relatively gentle, breakage of or damage to the tablets is significantly reduced.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Abstract

L'invention se rapporte à un appareil de dépoussiérage en cascade (10) qui élimine efficacement la poussière de comprimés provenant d'une machine (19, 20) de fabrication de comprimés en faisant tomber les comprimés le long d'un élément en cascade incliné (16). La poussière est éliminée de façon constante des comprimés par un système à vide (18) d'un appareil de dépoussiérage, et les comprimés dépoussiérés sont dirigés vers leurs récipients appropriés par l'intermédiaire d'une pluralité de tubes de déversement (21-26). L'appareil de dépoussiérage en cascade de l'invention comporte également des éléments destinés à commander l'écoulement des comprimés dépoussiérés (32, 33) vers un tube de déversement présélectionné.
PCT/US1993/009319 1992-10-02 1993-09-30 Appareil de depoussierage en cascade Ceased WO1994007404A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU51429/93A AU5142993A (en) 1992-10-02 1993-09-30 Cascade dedusting apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US95559992A 1992-10-02 1992-10-02
US955,599 1992-10-02

Publications (1)

Publication Number Publication Date
WO1994007404A1 true WO1994007404A1 (fr) 1994-04-14

Family

ID=25497060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/009319 Ceased WO1994007404A1 (fr) 1992-10-02 1993-09-30 Appareil de depoussierage en cascade

Country Status (2)

Country Link
AU (1) AU5142993A (fr)
WO (1) WO1994007404A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007185A1 (fr) * 2002-07-15 2004-01-22 I.M.A. Industria Macchine Automatiche S.P.A. Presse a comprimer
CN103879021A (zh) * 2014-04-11 2014-06-25 苏州润弘贸易有限公司 压片机
CN103879019A (zh) * 2014-04-09 2014-06-25 哈药集团三精制药四厂有限公司 清除压片机素片中的粉尘装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US775946A (en) * 1902-02-04 1904-11-29 Albert H Stebbins Concentrating-machine.
US2012633A (en) * 1931-12-02 1935-08-27 Meunier Felicien Joseph Apparatus for the pneumatic separation of materials comprising elements of different specific weights, such as raw coal
US2141451A (en) * 1935-06-05 1938-12-27 Colliery Engineering Ltd Apparatus for the pneumatic separation of materials of different specific gravities and sizes
FR994498A (fr) * 1949-07-05 1951-11-16 Installation pour le captage des poussières
US2617137A (en) * 1948-03-22 1952-11-11 Bodnar Alexander Apparatus for dusting capsules
US3096532A (en) * 1960-05-05 1963-07-09 Stokes F J Corp Tablet duster
US3114479A (en) * 1962-10-12 1963-12-17 Eagle Iron Works Control systems
US3412858A (en) * 1965-06-16 1968-11-26 Deister Concentrator Hydraulic classifier having automatic underflow discharge control
US3909873A (en) * 1973-08-15 1975-10-07 Alexandr Nikolaevich Minasov Device for dedusting loose materials
US4304611A (en) * 1980-04-24 1981-12-08 Aluminum Company Of America Method and apparatus for cleaning container closures
US4411038A (en) * 1981-11-16 1983-10-25 Shinichi Mukai Pneumatic cleaning system

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US775946A (en) * 1902-02-04 1904-11-29 Albert H Stebbins Concentrating-machine.
US2012633A (en) * 1931-12-02 1935-08-27 Meunier Felicien Joseph Apparatus for the pneumatic separation of materials comprising elements of different specific weights, such as raw coal
US2141451A (en) * 1935-06-05 1938-12-27 Colliery Engineering Ltd Apparatus for the pneumatic separation of materials of different specific gravities and sizes
US2617137A (en) * 1948-03-22 1952-11-11 Bodnar Alexander Apparatus for dusting capsules
FR994498A (fr) * 1949-07-05 1951-11-16 Installation pour le captage des poussières
US3096532A (en) * 1960-05-05 1963-07-09 Stokes F J Corp Tablet duster
US3114479A (en) * 1962-10-12 1963-12-17 Eagle Iron Works Control systems
US3412858A (en) * 1965-06-16 1968-11-26 Deister Concentrator Hydraulic classifier having automatic underflow discharge control
US3909873A (en) * 1973-08-15 1975-10-07 Alexandr Nikolaevich Minasov Device for dedusting loose materials
US4304611A (en) * 1980-04-24 1981-12-08 Aluminum Company Of America Method and apparatus for cleaning container closures
US4411038A (en) * 1981-11-16 1983-10-25 Shinichi Mukai Pneumatic cleaning system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007185A1 (fr) * 2002-07-15 2004-01-22 I.M.A. Industria Macchine Automatiche S.P.A. Presse a comprimer
CN103879019A (zh) * 2014-04-09 2014-06-25 哈药集团三精制药四厂有限公司 清除压片机素片中的粉尘装置
CN103879021A (zh) * 2014-04-11 2014-06-25 苏州润弘贸易有限公司 压片机

Also Published As

Publication number Publication date
AU5142993A (en) 1994-04-26

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