Title of Invention

TWO CAROUSEL TYPE POWDERY PRODUCT DOSING MACHINE

Abstract A two carousel type powdery product dosing machine (1) consisting of a dose forming carousel (2) and a hard gelatin capsule handling carousel (3) disposed adjacent to each other and mounted on vertical axes (5, 13) to describe intermittent rotational movements cyclically to make capsules dosed with the powdery product. The dose forming carousel comprises a dosing disc (4) provided with a plurality of sets of through vertical passages (7) placed angularly equidistantly around the periphery thereof and a bottom plate (11) with an interrupted portion (11a) disposed below the dosing disc to close the vertical passages at the bottom thereof except one set of vertical passages. The dosing machine further consists of a variable force exerting mechanism (25a, 37) for exerting a variable force and supporting the bottom plate against the dosing disc in close contact therewith during both the tamping and indexing operations of the machine (Figs 1 and 2).
Full Text FORM 2
THE PATENTS ACT, 1970 (39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
& The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
Two carousel type powdery product dosing machine
APPLICANTS
Sci-tech Centre, 7 Prabhat Nagar, Jogeshwari West, Mumbai 400 102, Maharashtra, India, an Indian company
INVENTORS
Singh Jasjit, a British national, 2B Swapnalok, 47, L J Marg, Napean Sea Road, Mumbai 400 006, Maharashtra India, Deshmukh Prakash, an Indian national, 305, Sundaram, Vasant Housing Complex, Mahavir Nagar, Kandivli (West), Mumbai 400 067, Maharashtra, India and D'Silva James, an Indian national, Teresa Niwas, Mukti Wadi, Near Holi Bazar, Vasai (W), Thane 401 201, Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the nature of this invention and the manner in which it is to be performed :

FIELD OF INVENTION
This invention relates to a two carousel type powdery product dosing machine.
The dosing machine is particularly suitable for packaging doses of powdery product or loose product like medicaments in containers like hard gelatin capsules.
This invention also relates to a variable force exerting mechanism for supporting a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine against the dosing disc of the machine in close contact with the dosing disc during both the tamping and indexing operations of the machine.
This invention also relates to a method of applying a variable force on a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine to maintain close contact with the dosing disc of the machine and to reduce powder dusting during both the tamping and indexing operations of the machine.
PRIOR ART
A two carousel type powdery product dosing machine includes a dose forming carousel and a hard gelatin capsule handling carousel. Both the carousels are disposed adjacent to each other and are rotatable intermittently in the same direction on vertical axes. The dose forming carousel includes a rotatable dosing disc and a powdery product holder
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disposed above the dosing disc. The dosing disc is provided with a plurality of sets of through vertical passages which are angularly equidistantly placed around the periphery of the dosing disc. Mounted above the dosing disc are a plurality of sets of vertical plungers (pistons) disposed in the same layout as the sets of vertical passages in the dosing disc. The plungers are height adjustable and movable up and down. The sets of plungers form the different stations of the dose forming carousel during its intermittent rotation and are so mounted as to describe different strokes successively. A bottom plate with an interrupted portion (part annulus) is provided below the dosing disc so as to close the vertical passages in the dosing disc at the bottom thereof expect the vertical passages positioned in the interrupted portion of the bottom plate during the intermittent rotation of the dose forming carousel. The bottom plate is supported on a plurality of vertically disposed bolts against the heads thereof. The bolts are screwed into threaded holes provided in the machine frame and are locked in position against the machine frame by locking nuts. The height of the bottom plate can be adjusted by screwing the bolts up or down in the threaded holes in the machine frame after loosening the locking nuts. The bottom plate is otherwise rigidly fixed and stationary. The capsule handling carousel includes another rotatable disc provided with plurality of capsule handling units disposed angularly equidistantly around the periphery thereof. The capsule handling units form the various stations of the capsule handling carousel. Each of the capsule handling units comprises two superimposed capsule holders (bodies). The upper capsule holders are fixed to the capsule handling carousel and are provided with bushes or seatings to hold the capsule tops and the lower capsule holders are provided with bushes or seatings to hold the capsule bottoms. The lower capsule holders are connected to the capsule
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handling carousel by means of radial slides which in response to signals move the lower capsule holders one by one away from the respective upper capsule holders and position them under a set of vertical passages in the dosing disc in the interrupted portion of the bottom plate and retract them to their original position. The lower ends of the plungers are profiled to pass through the vertical passages. The capsule handling units and the sets of vertical passages in the dosing disc are so provided and the intermittent rotational movements of the carousels are so synchronized that one set of the vertical passages is lined up cyclically with one capsule handling unit. The dimensions of the vertical passages are a direct function of the mass of the doses of the powdery product to be packaged in the capsules and a function of the dimensions of the capsules themselves.
In a cycle of operation of the machine, one set of vertical passages of the dose forming carousel filled up with the powdery product upto the required dose is lined with one capsule handling unit with the lower capsule holder of the said one capsule handling unit moved away from the respective upper capsule holder and extended and positioned below the said one set of vertical passages in the interrupted portion of the bottom plate. The respective set of plungers move down and expel the powdery product in the said one set of vertical passages into the capsule bottoms in the said one lower capsule holder. Simultaneously the remaining plungers move down and press the powdery product in the powdery product holder into the corresponding remaining sets of vertical passages in layers or stages of increased quantity until the last set of the vertical passages among the remaining set of vertical passages is completely filled with the powdery product to the required dose. This is called the tamping operation. Following this the plungers move up
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and the carousels rotate by a predetermined angle. This is called the indexing operation. The said last set of the vertical passages among the remaining set of vertical passages filled with the powdery product to the required dose aligns with a capsule handling unit and the cycle repeats. In the succeeding stations of the capsule handling carousel, the extended lower capsule holder holding the capsule bottoms filled with the powdery product to the required dose, moves back to its original position, the capsule bottoms are closed with the capsule tops in the respective upper capsule holder and the closed capsules are expelled from the capsule handling carousel.
In order to ensure rotation of the dosing disc over the bottom plate with limited sliding friction during indexing a clearance is provided between the two. During the tamping and indexing operations, the powdery product in the vertical passages in the dosing disc escape into the clearance between the dosing disc and bottom plate and is lost. This is called powder dusting. Due to powder dusting there is loss of the powdery product resulting in economic loss. The accuracy in the volume of the doses and reliability of the machine are also affected.
Roberto in US6425422 BI describes a composite carousel integrating both the dose forming and capsule handling operations. The capsule handling units are provided around the carousel. Each of the capsule handling units comprises two super imposed capsule holders. The lower capsule holders of the capsule handling units are provided with extensions in the direction of the carousel. In stations of the carousel in which tamping takes place, the vertical passages in the dosing disc of the carousel are closed at
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the bottom by the bottom plate. The extensions of the respective lower capsule holders lie below the bottom plate in close contact therewith. The radial slides of the respective lower capsule holders rest on rollers with horizontal axes so as to ensure close contact between the extensions and the bottom plate and the bottom plate and the dosing disc. The rollers are not provided in stations of the carousel in which the lower capsule holders with capsule bottoms are to be moved away and lined up with the set of vertical passages in the dosing disc containing the required doses of the product and then moved back to their original positions to be closed by the capsule tops in the respective upper capsule holders. As the extensions slide in and out with the respective lower capsule holders, there will be sliding friction. In order to allow the extensions to move against the bottom plate with limited sliding friction, a slight vertical play by way of a small clearance is provided between the two. This can cause a corresponding clearance between the disc and the bottom plate and lead to powder dusting. Besides, the composite carousel is complicated in construction. As equivalents to the rollers, Roberto has disclosed rollers connected underneath the movable lower capsule holders and extensions and run on fixed tracks. Alternatively, the various operating stations could have one or more movable opposing members that are lowered during the rotation of the carousel and raised after this rotation. Both these equivalents will require a clearance between the dosing disc and bottom plate during rotation of the dosing disc in order to limit sliding friction between the dosing disc and bottom plate. This clearance can also lead to powder dusting.
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OBJECTS OF INVENTION
An object of the invention is to provide a two carousel type powdery product dosing machine which reduces powder dusting and product and economic losses and improves powder yield.
Another object of the invention is to provide a two carousel type powdery product dosing machine which improves accuracy in the volume of the doses.
Another object of the invention is to provide a two carousel type powdery product dosing machine which improves the reliability of the machine.
Another object of the invention is to provide a variable force exerting mechanism to support a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine, whereby powder dusting and product and economic losses can be reduced and product yield can be improved.
Another object of the invention is to provide a variable force exerting mechanism to support a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine, whereby the accuracy in the volume of the doses can be improved.
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Another object of the invention is to provide a variable force exerting mechanism to support a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine, whereby the reliability of the machine can be improved.
Another object of the invention is to provide a method of applying a variable force on a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine to maintain close contact between the bottom plate and the dosing disc of the machine and to reduce powder dusting during both the tamping and indexing operations of the machine.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided a two carousel type powdery product dosing machine consisting of a dose forming carousel and a hard gelatin capsule handling carousel disposed adjacent to each other and mounted on vertical axes to describe intermittent rotational movements cyclically to make capsules dosed with the powdery product, the dose forming carousel comprising a dosing disc provided with a plurality of sets of through vertical passages placed angularly equidistantly around the periphery thereof and a bottom plate with an interrupted portion disposed below the dosing disc to close the vertical passages at the bottom thereof except one set of vertical passages, the dosing machine further consisting of a variable force exerting mechanism for exerting a
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variable force and supporting the bottom plate against the dosing disc in close contact therewith during both the tamping and indexing operations of the machine.
According to an embodiment of the invention, the variable force exerting mechanism comprises a plurality of retractable force exerting means and a plurality of resilient force exerting means angularly equidistantly located underneath the bottom plate, the retractable force exerting means and resilient force exerting means together exerting force on the bottom plate to maintain close contact with the dosing disc during the tamping operation of the machine and the resilient force exerting means exerting force on the bottom plate to maintain close contact with the dosing disc during the indexing operation of the machine.
According to the invention there is also provided a variable force exerting mechanism for supporting a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine against the dosing disc of the machine in close contact with the dosing disc during both the tamping and indexing operations of the machine, the variable force exerting mechanism comprising a plurality of retractable force exerting means and a plurality of resilient force exerting means angularly equidistantly located underneath the bottom plate, the retractable force exerting means and resilient force exerting means together exerting force on the bottom plate to maintain close contact with the dosing disc during the tamping operation of the machine and the resilient force exerting means exerting force on the bottom plate to maintain close contact with the dosing disc during the indexing operation of the machine.
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According to the invention there is also provided a method of applying a variable force on a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine to maintain close contact between the bottom plate and dosing disc of the machine and to reduce powder dusting during both the tamping and indexing operations of the machine.
According to an embodiment of the method of the invention, the variable force comprises two force components, one of the force components being retractable and the other being resilient, both the force components together being greater than the downward force on the bottom plate during the tamping operation to maintain close contact between the bottom plate and dosing disc during the tamping operation and the other force component being greater than the downward force on the bottom plate during the indexing operation to maintain close contact between the bottom plate and dosing disc during the indexing operation.
The following is a detailed description of the invention with reference to the accompanying drawing, in which:
Fig 1 is plan view of a two carousel type powdery product dosing machine according to an embodiment of the invention;
Fig 2 is a schematic layout of part of a variable force exerting mechanism as used in the machine of Fig 1 according to an embodiment of the invention;
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Fig 3 is section at A-A in Fig 1 incorporating the variable force exerting mechanism of Fig 2;
Fig 4 is enlarged scrap section at B-B in Fig 3;
Fig 5 is enlarged section at C-C in Fig 3;
Fig 6 is section at D-D in Fig 1 incorporating the variable force exerting mechanism of Fig 2 without the bracket of the dose forming carousel;
Fig 7 is a schematic layout of part of a variable force exerting mechanism as used in the machine of Fig 1 according to another embodiment of the invention;
Fig 8 is section at A-A in Fig 1 incorporating the variable force exerting mechanism of Fig 7;
Fig 9 is schematic layout of part of a variable force exerting mechanism as used in Fig 1 according to another embodiment of the invention;
Fig 10 is section at A-A in Fig 1 incorporating the variable force exerting mechanism of Fig 9; and
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Fig 11 is an enlarged section at E-E in Fig 1.
The powdery product dosing machine 1 as illustrated in the accompanying drawings particularly Fig 1 includes a dose forming carousel 2 and a hard gelatin capsule handling carousel 3 disposed adjacent to each other (Figs 1, 6, 8 and 10). The dose forming carousel includes dosing disc 4 horizontally rotatably mounted on a vertical shaft 5. A powdery product holder 6 is disposed above the dosing disc and is rotatable with the dosing disc (Figs 3, 6, 8 and 10). A plurality of sets of through vertical passages 7 are angularly equidistantly provided around the periphery of the dosing disc (Figs 1, 6, 8 and 10). 8 is a bracket disposed horizontally above the dosing disc for mounting a plurality of sets of vertical plungers (pistons) 9 placed in the same layout as the sets of vertical passages in the dosing disc (Figs 3, 6, 8 and 10). The vertical slides for the bracket 8 are marked 10a and 10b (Fig 1). 11 is a bottom plate with an interrupted portion 11a provided below the dosing disc so as to close the vertical passages at the bottom thereof expect the vertical passages positioned in the interrupted portion of the bottom plate (Figs 1, 3, 6, 8 and 10). The capsule handling carousel includes a disc 12 horizontally rotatably mounted on a vertical shaft 13 (Fig 1). A plurality of capsule handling units 14 are disposed angularly equidistantly around the periphery of the disc 12 (Fig 1). As shown in Figs 1 and 11, each of the capsule handling units comprises two superimposed capsule holders 15a and 15b. The upper capsule holders 15a are fixed to the disc 12 by brackets 16 and are provided with bushes or seatings 17 to hold capsule tops (not shown). The lower capsule holders 15b are provided with bushes or seatings 18 to hold the capsule bottoms (not shown). The lower capsule holders are connected to the disc 12 by
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means of radial slides 19 which can slide and extend the lower capsule holders one by one away from the respective upper capsule holders and position them in the interrupted portion 1 la of the bottom plate 11 underneath the respective sets of vertical passages 7 in the dosing disc 4 and then slide the lower capsule holders one by one back to their original position underneath the respective upper capsule holders during the cyclic intermittent rotation of the carousels in the same direction so as to line up one set of vertical passages cyclically with one capsule handling unit. The machine frame is marked 20 (Figs 3, 6, 8 and 10). 21 is an adapter for the dosing disc fixed to the dosing disc. The dosing disc along with the adapter rotates in the machine frame against the bearing marked 22 (Figs 3, 6, 8 and 10). Powdery product in the holder 6 is marked 23. 24 is a dust trap of the machine (Figs 3, 6, 8 and 10).
As illustrated in Figs 2 to 6 of the drawings, three numbers of retractable force exerting means 25a are angularly equidistantly placed underneath the bottom plate 11. Each of the retractable force exerting means 25a is a pushing means comprising a vertical member 26 up and down movably engaged in a hole (not marked but can be seen in Fig 3) formed in a horizontal flange 27 of the machine frame 20 and a corresponding hole (not marked but can be seen in Fig 3) formed in a horizontally disposed mounting plate 28 fixed to the bottom of the machine frame. The upper end of the vertical member is provided with a radius marked 26a. The lower end of the vertical member is tapered (taper marked 26b) and is resting against a roller 29 in sliding contact therewith. The roller is rotatably held on a support member 29a fixed to the mounting plate and pivoted in a C-shaped member 30 by pivot pin 31 (Fig 5). The C-shaped member is fixed to the
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piston rod 32a of a pneumatic cylinder 33a by engaging the threaded end of the piston rod in a threaded hole (not shown but can be seen in Fig 5) in the C-shaped member. 30a is a locking nut for locking the piston rod to the C-shaped member. The pneumatic cylinder is horizontally disposed and mounted to the mounting plate 28 by means of support 34. As the piston rod reciprocates linearly in the pneumatic cylinder responsive to pressurisation and depressurisation of the cylinder side and piston side of the pneumatic cylinder alternatively, the roller rotates about the pivot pin 31 back and forth and converts the linear motion of the piston rod into a back and forth rotary motion of the roller and the vertical member moves up and down. The up and down travel of the vertical member corresponds to the angle of taper at the bottom of the vertical member. 35 is a pin horizontally located in a hole (not marked can be seen in Figs 3 and 4) formed in the horizontal flange 27. The outer end of the pin 35 is engaged in vertical groove 36 formed in the vertical member. As the vertical member moves up and down the pin 35 guides its up and down movement and also limits its up and down movement by abutting the end walls of the vertical groove 36. The bottom plate 11 is supported on a five numbers of compression springs 37 angularly equidistantly placed around it (Fig 2). Each of the compression springs is located over the upper part of an externally threaded vertically disposed pin 38 (Fig 6). The upper end of the spring bears against the bottom plate and the lower end of the spring is located against a locking nut 39 which is in thread engagement with the pin 38. The lower end of the pin 38 is fitted in a threaded hole (not marked but can be seen in Fig 6) formed in a horizontal projection 40 of the machine frame 20 in thread engagement therewith. The pin 38 is locked in position by tightening
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another locking nut 41 against the horizontal projection 40. The spring tension against the bottom plate can be adjusted by turning the locking nut 39 up or down on the pin 38 .
During the tamping operation of the machine, the vertical members 26 are moved up against the bottom plate 11 by operating the pneumatic cylinders 33a. The vertical members move up and push against the bottom plate 11. The compression springs 37 also continue to exert upward tension against the bottom plate. The combined upward force exerted by the vertical members and compression springs is greater than the downward force acting on the dosing disc during tamping so as to maintain close contact between the dosing disc and the bottom plate. Therefore, the vertical passages 7 in the dosing disc 4 are effectively closed at their bottom by the bottom plate 11 and loss of the powdery product through the bottom of the vertical passages is minimized and practically eliminated. During the indexing operation, the vertical members are retracted by operating the pneumatic cylinders 33a. The compression springs 37 continue to bear against the bottom plate 11 and exert upward tension against the bottom plate. The upward force exerted by the compression springs is greater than the downward force on the dosing disc so as to maintain close contact between the dosing disc and the bottom plate. Therefore, the vertical passages 7 in the dosing disc 4 continue to be effectively closed at their bottom by the bottom plate to minimize and practically eliminate loss of the powdery product through the bottom of the vertical passages. According to the invention powder dusting is thus minimized and practically eliminated both during the tamping and indexing operations of the machine. If at all there is any powder dusting, it will be minimal and is collected in the dust trap 24. Consequently product and economic
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losses are almost eliminated and powder yield, accuracy in the volume of the doses and reliability of the machine are improved. Due to the resiliency and elasticity of the compression springs the bottom plate is almost like floated. Therefore, during indexing, the dosing disc rotates against the bottom plate with limited sliding friction. In order to reduce the friction, the contact surfaces of the dosing disc and bottom plate are optionally provided with wear resistant coatings comprising, for instance, teflon, chromium, tungsten carbide carbon or ceramic. Due to the radius at the upper end of the vertical member, the vertical member has reduced surface area of contact with the bottom plate thereby reducing friction between the two.
The retractable force exerting means 25b as illustrated in Figs 7 and 8 of the drawings is similar to that of Figs 2 to 6 except for the difference that the vertical member 26' at its lower end is in thread engagement with a nut 42 which is rotatably held on support member 29a fixed to the mounting plate 28 and provided with a lateral arm 43b which is rigidly coupled to the piston rod 32b of a pneumatic cylinder 33b horizontally disposed and mounted to the mounting plate 28. 44 is a sleeve disposed over the arm 43b and piston rod 32b and 44a is a pin whereby the arm 43b, piston rod 32b and sleeve 44 are rigidly held together. As the piston rod reciprocates in the pneumatic cylinder, the nut 42 rotates back and forth and converts the linear motion of the piston rod into rotary motion and cause the vertical member to move up and down. The up and down movement of the vertical member corresponds to the back and forth linear displacement of the piston rod.
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The retractable force exerting means 25c as illustrated in Figs 9 and 10 of the drawings comprises a pneumatic cylinder 33c vertically mounted on the horizontal flange 27 of the machine frame 20. 45 is a support pad (disc or bush) fitted at the outer end of the piston rod 32c by grub screw 46. The support pad is moved up and down by operating the pneumatic cylinder. In the raised position of the support pad, it abuts against the bottom plate and pushes the bottom plate upwardly. In the lowered position of the support pad, the bottom plate is supported against the compression springs and the indexing operation is carried out.
It is to be clearly understood that the variable force exerting mechanism of the invention can be easily incorporated in an existing or conventional two carousel type powdery product dosing machine so as to minimize or practically eliminate powder dusting and achieve the advantages of the invention. As is abundantly clear to those skilled in the art, the invention is essentially in providing a variable upward force against the bottom plate so as to maintain close contact between the bottom plate and the dosing disc both during the tamping and indexing operations and at the same time allowing the dosing disc to rotate against the bottom plate in close contact therewith with a limited sliding friction during the indexing operation. There can be variations in the construction of the retractable force exerting means and resilient force exerting means as illustrated and described in the specification. The number of retractable force exerting means and resilient force exerting means can vary. The up and down movements of the vertical member may be provided by, for instance, a reversible motor through a linkage or hydraulic cylinders. The variable force exerting can be effectively used for supporting,
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besides the bottom plate of a two carousel type powdery product dosing machine, any other body which is subjected to a variable or differential downward force. Such variations of the invention are obvious to those skilled in the art and are to be construed and understood to be within the scope of the invention.
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We claim:
1. A two carousel type powdery product dosing machine consisting of a dose forming carousel and a hard gelatin capsule handling carousel disposed adjacent to each other and mounted on vertical axes to describe intermittent rotational movements cyclically to make capsules dosed with the powdery product, the dose forming carousel comprising a dosing disc provided with a plurality of sets of through vertical passages placed angularly equidistantly around the periphery thereof and a bottom plate with an interrupted portion disposed below the dosing disc to close the vertical passages at the bottom thereof except one set of vertical passages, the dosing machine further consisting of a variable force exerting mechanism for exerting a variable force and supporting the bottom plate against the dosing disc in close contact therewith during both the tamping and indexing operations of the machine.
2. A dosing machine as claimed in claim 1, wherein the variable force exerting mechanism comprises a plurality of retractable force exerting means and a plurality of resilient force exerting means angularly equidistantly located underneath the bottom plate, the retractable force exerting means and resilient force exerting means together exerting force on the bottom plate to maintain close contact with the dosing disc during the tamping operation of the machine and the resilient force exerting means exerting force on the bottom plate to maintain close contact with the dosing disc during the indexing operation of the machine.
3. A dosing machine as claimed in claim 2, which comprises three retractable force exerting means and five resilient force exerting means.
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4. A dosing machine as claimed in claim 2 or 3, wherein the retractable force exerting means comprises pushing means and the resilient force exerting means comprises compression spring means.
5. A dosing machine as claimed in claim 4, wherein the compression spring means comprises a compression spring located over the upper part of an externally threaded vertically disposed pin, the upper end of the spring bearing against the bottom plate and the lower of the spring being located against a locking nut which is in thread engagement with the pin, the lower end of the pin being fitted in a threaded hole formed in a horizontal projection of the machine frame in thread engagement therewith and locked in position by another locking nut.
6. A dosing machine as claimed in claim 4, wherein the pushing means comprises a vertical member up and down movably engaged in a hole formed in a horizontal flange of the machine frame and a corresponding hole formed in a horizontally disposed mounting plate fixed to the bottom of the machine frame, the upper end of the vertical member being provided with a radius and abutting against the bottom plate, the lower end of the vertical member being tapered and resting against a roller in sliding contact therewith, the roller being rotatably held on a support member fixed to the mounting plate and pivoted in a C-shaped member which is fixed to the piston rod of a pneumatic cylinder horizontally disposed and mounted to the mounting plate, the up and down movement of
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the vertical member corresponding to the angle of taper at the bottom of the vertical member and being guided by a guide means.
7. A dosing machine as claimed in claim 4, wherein the pushing means comprises a vertical member up and down movably engaged in a hole formed in a horizontal flange of the machine frame and a corresponding hole formed in a horizontally disposed mounting plate fixed to the bottom of the machine frame, the upper end of the vertical member being provided with a radius and abutting against the bottom plate, the lower end of the vertical member being engaged in a nut in thread engagement therewith, the nut being rotatably held on a support member fixed to the mounting plate and provided with a lateral arm which is rigidly fixed to the piston rod of a pneumatic cylinder horizontally disposed and mounted to the mounting plate, the up and down movement of the vertical member corresponding to the back and forth linear displacement of the piston rod and being guided by a guide means.
8. A dosing machine as claimed in claim 6 or 7, wherein the guide means comprises a pin horizontally located in a hole formed in the horizontal flange of the machine frame, the outer end of the pin being engaged in a vertical groove formed in the vertical member so as to guide and limit the up and down movement of the vertical member.
9. A dosing machine as claimed in claim 4, wherein the pushing means
comprises a pneumatic cylinder vertically mounted on a horizontal flange of the machine
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frame and fitted with a support pad at the outer end of the piston rod thereof, the support pad abutting against the bottom plate.
10. A dosing machine as claimed in anyone of claims 1 to 9, wherein the contact surfaces of the dosing disc and bottom plate are provided with wear resistant coatings to reduce sliding friction therebetween.
11. A variable force exerting mechanism for supporting a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine against the dosing disc of the machine in close contact with the dosing disc during both the tamping and indexing operations of the machine, the variable force exerting mechanism comprising a plurality of retractable force exerting means and a plurality of resilient force exerting means angularly equidistantly located underneath the bottom plate, the retractable force exerting means and resilient force exerting means together exerting force on the bottom plate to maintain close contact with the dosing disc during the tamping operation of the machine and the resilient force exerting means exerting force on the bottom plate to maintain close contact with the dosing disc during the indexing operation of the machine.
12. A variable force exerting mechanism as claimed in claim 11, which comprises three retractable force exerting means and five resilient force exerting means.
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13. A variable force exerting mechanism as claimed in claim 11 or 12, wherein
the variable force exerting means comprises pushing means and the resilient force
exerting means comprises a compression spring means.
14. A variable force exerting mechanism as claimed in claim 13, wherein the compression spring means comprises a compression spring located over the upper part of an externally threaded vertically disposed pin, the upper end of the spring bearing against the bottom plate and the lower of the spring being located against a locking nut which is in thread engagement with the pin, the lower end of the pin being fitted in a threaded hole formed in a horizontal projection of the machine frame in thread engagement therewith and locked in position by another locking nut.
15. A variable force exerting mechanism as claimed in claim 13, wherein the pushing means comprises a vertical member up and down movably engaged in a hole formed in a horizontal flange of the machine frame and a corresponding hole formed in a horizontally disposed mounting plate fixed to the bottom of the machine frame, the upper end of the vertical member being provided with a radius and abutting against the bottom plate, the lower end of the vertical member being tapered and resting against a roller in sliding contact therewith, the roller being rotatably held on a support member fixed to the mounting plate and pivoted in a C-shaped member which is fixed to the piston rod of a pneumatic cylinder horizontally disposed and mounted to the mounting plate, the up and down movement of the vertical member corresponding to the angle of taper at the bottom of the vertical member and being guided by a guide means.
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16. A variable force exerting mechanism as claimed in claim 13, wherein the pushing means comprises a vertical member up and down movably engaged in a hole formed in a horizontal flange of the machine frame and a corresponding hole formed in a horizontally disposed mounting plate fixed to the bottom of the machine frame, the upper end of the vertical member being provided with a radius and abutting against the bottom plate, the lower end of the vertical member being engaged in a nut in thread engagement therewith, the nut being rotatably held on a support member fixed to the mounting plate and provided with a lateral arm which is rigidly fixed to the piston rod of a pneumatic cylinder horizontally disposed and mounted to the mounting plate, the up and down movement of the vertical member corresponding to the back and forth linear displacement of the piston rod and being guided by a guide means.
17. A variable force exerting mechanism as claimed in claim 15 or 16, wherein the guide means comprises a pin horizontally located in a hole formed in the horizontal flange of the machine frame, the outer end of the pin being engaged in a vertical groove formed in the vertical member so as to guide and limit the up and down movement of the vertical member.
18. A variable force exerting mechanism as claimed in claim 13, wherein the pushing means comprises a pneumatic cylinder vertically mounted on a horizontal flange of the machine frame and fitted with a support pad at the outer end of the piston rod thereof, the support pad abutting against the bottom plate.
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19. A method of applying a variable force on a body experiencing variable force such as the bottom plate of a two carousel type powdery product dosing machine to maintain close contact between the bottom plate and dosing disc of the machine and to reduce powder dusting during both the tamping and indexing operations of the machine.
20. A method as claimed in claim 19, wherein the variable force comprises two force components, one of the force components being retractable and the other being resilient, both the force components together being greater than the downward force on the bottom plate during the tamping operation to maintain close contact between the bottom plate and dosing disc during the tamping operation and the other force component being greater than the downward force on the bottom plate during the indexing operation to maintain close contact between the bottom plate and dosing disc during the indexing operation.
Dated this 27th day of June 2006.
Sci-Tech Centre By their Agent & Attorney
(Jose M A) of Khaitan & Co
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Abstract
A two carousel type powdery product dosing machine (1) consisting of a dose forming carousel (2) and a hard gelatin capsule handling carousel (3) disposed adjacent to each other and mounted on vertical axes (5, 13) to describe intermittent rotational movements cyclically to make capsules dosed with the powdery product. The dose forming carousel comprises a dosing disc (4) provided with a plurality of sets of through vertical passages (7) placed angularly equidistantly around the periphery thereof and a bottom plate (11) with an interrupted portion (11a) disposed below the dosing disc to close the vertical passages at the bottom thereof except one set of vertical passages. The dosing machine further consists of a variable force exerting mechanism (25a, 37) for exerting a variable force and supporting the bottom plate against the dosing disc in close contact therewith during both the tamping and indexing operations of the machine (Figs 1 and 2).

Documents:

1033-MUM-2006-ABSTRACT(26-3-2010).pdf

1033-MUM-2006-ABSTRACT(28-6-2006).pdf

1033-MUM-2006-ABSTRACT(6-4-2009).pdf

1033-MUM-2006-ABSTRACT(GRANTED)-(3-11-2010).pdf

1033-mum-2006-abstract-1.jpg

1033-mum-2006-abstract.doc

1033-mum-2006-abstract.pdf

1033-MUM-2006-CANCELLED PAGES (26-3-2010).pdf

1033-mum-2006-cancelled pages(26-3-2010).pdf

1033-MUM-2006-CANCELLED PAGES(6-4-2009).pdf

1033-MUM-2006-CLAIMS(28-6-2006).pdf

1033-MUM-2006-CLAIMS(6-4-2009).pdf

1033-MUM-2006-CLAIMS(AMENDED)-(26-3-2010).pdf

1033-MUM-2006-CLAIMS(AMENDED)-(6-4-2009).pdf

1033-MUM-2006-CLAIMS(GRANTED)-(3-11-2010).pdf

1033-MUM-2006-CLAIMS(MARKED COPY)-(26-3-2010).pdf

1033-mum-2006-claims.pdf

1033-mum-2006-correspondance-recieved.pdf

1033-mum-2006-correspondence(26-3-2010).pdf

1033-MUM-2006-CORRESPONDENCE(27-6-2006).pdf

1033-MUM-2006-CORRESPONDENCE(30-9-2009).pdf

1033-MUM-2006-CORRESPONDENCE(6-4-2009).pdf

1033-MUM-2006-CORRESPONDENCE(9-7-2010).pdf

1033-mum-2006-correspondence(ipo)-(18-3-2010).pdf

1033-MUM-2006-CORRESPONDENCE(IPO)-(3-11-2010).pdf

1033-mum-2006-description (complete).pdf

1033-MUM-2006-DESCRIPTION(COMPLETE)-(28-6-2006).pdf

1033-MUM-2006-DESCRIPTION(COMPLETE)-(6-4-2009).pdf

1033-MUM-2006-DESCRIPTION(GRANTED)-(3-11-2010).pdf

1033-mum-2006-drawing(28-6-2006).pdf

1033-MUM-2006-DRAWING(6-4-2009).pdf

1033-MUM-2006-DRAWING(GRANTED)-(3-11-2010).pdf

1033-MUM-2006-FORM 1(28-6-2006).pdf

1033-mum-2006-form 1(4-9-2006).pdf

1033-mum-2006-form 18(19-9-2006).pdf

1033-mum-2006-form 2(6-4-2009).pdf

1033-MUM-2006-FORM 2(COMPLETE)-(28-6-2006).pdf

1033-MUM-2006-FORM 2(GRANTED)-(3-11-2010).pdf

1033-MUM-2006-FORM 2(TITLE PAGE)-(6-4-2009).pdf

1033-MUM-2006-FORM 2(TITLE PAGE)-(COMPLETE)-(28-6-2006).pdf

1033-MUM-2006-FORM 2(TITLE PAGE)-(GRANTED)-(3-11-2010).pdf

1033-mum-2006-form 26(4-9-2006).pdf

1033-mum-2006-form 3(28-6-2006).pdf

1033-mum-2006-form-1.pdf

1033-mum-2006-form-2.doc

1033-mum-2006-form-2.pdf

1033-mum-2006-form-3.pdf

1033-MUM-2006-REPLY TO EXAMINATION REPORT(26-3-2010).pdf

1033-MUM-2006-SPECIFICATION(AMENDED)-(26-3-2010).pdf

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Patent Number 243751
Indian Patent Application Number 1033/MUM/2006
PG Journal Number 45/2010
Publication Date 05-Nov-2010
Grant Date 03-Nov-2010
Date of Filing 28-Jun-2006
Name of Patentee SCI-TECH CENTRE
Applicant Address 7 PRABHAT NAGAR, JOGESHWARI WEST, MUMBAI
Inventors:
# Inventor's Name Inventor's Address
1 SINGH JASJIT 2B SWAPNALOK, 47, L.J.MARG, NEPEAN SEA ROAD, MUMBAI 400 006
2 DESHMUKH PRAKASH 3-5, SUNDARAM, VASANT HOUSE COMPLEX, MAHAVIR NAGAR, KANDIVLI (WEST), MUMBAI 400 067
3 D'SILVA JAMES TERRESA NIWAS, MUKTI WADI, NEAR HOLI BAZAR, VASAI (W), THANE 401 201
PCT International Classification Number A61J3/07,B65B1/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA