FIELD OF THE INVENTION
The present invention relates to an improved plurality rotary bowl cream sandwiching
machine. More particularly to a sandwiching machine with plurality of rotary bowl
capable of depositing plurality of creams of different shapes and sizes on
confectionary/bakery products, wherein the said machine has drive (s) to rotate the said
bowls/drums in a manner such that one type of cream does not overlap with the others
BACKGROUND OF THE INVENTION
Conventional wire-cut rotary bowl cream sandwiching machine comprises of one bowl
with a set of nozzles (number varying between 10 and 12 normally) for the deposition of
one type of cream on to the bottom shells of the sandwiched biscuits. However, with a
view to design a similar sandwiching machine, which can deposit two different creams -
not smudging/overlapping with each other on to the same bottom shell, a change in the
machine design has been brought about.
There are mainly two types of machines available for cream sandwiching process in
biscuits.
Rotary Bowl type wire cut machine and Stencil type wire cut machine
In stencil type of machine, there is one stationary cylinder and another co-axially
mounted rotating cylinder. There are openings, known as 'ports', on both the rotating and
stationery cylinders. Cream is pumped in the stationary cylinder. Rotating cylinder keeps
on rotating en over stationary cylinder. Cream is pumped in rotating cylinder, which
rotates inside a stationary cylinder. Cream is deposited on shell when ports on stationary
and rotating cylinder becomes co-axial. Shells are carried on wires with the help of chain
with exact cream deposition on shells is achieved by matching the peripheral speed of
stencil with linear speed of chain. Cream is wire-cut by means of a spring-loaded piano
wire assembly after the same gets deposited on to the bottom shells.
In wire cut machines, there is a rotating drum carrying cream. Nozzles, in the form of
assembled components, are mounted at the bottom plate of this drum. There is a spring-
loaded plunger, which is used as gate to extrude the cream on the shell. A profile is given
inside the cylinder on every nozzle fixture to lift the spring loaded plunger as it comes at
the point of deposition of cream and wire cutting.
In conventional rotating drum type machines, there is one drive, which drives chain-
carrying shells and rotates drum-carrying cream with the help of chain and sprocket
arrangement. But conventional chain sprocket type transmission mechanism has got a
large tolerance in the design itself due to following reasons:
i. Design and manufacturing tolerance of sprocket is high.
ii. Design and manufacturing tolerance of chain links is high.
Because of these high tolerances in case of concentric cream sandwiches, smudging of
cream will happen. Precise deposition of two types of cream without any intervening
overlap is of utmost importance. The precision control on the cream deposition quantum
should be there. Thus, the transmission system in the conventional machine has to be
changed.
The variation in cream deposition quantum through known type of wire-cut sandwiching
machines in the current design even exceeds 18 to 20% with single drum machines. It is
rather, more of engineering solution to ensure that the relative positions of two
complimentary cream nozzles in two separate bowls at the precise time of cream wire-
cutting perfectly synchronize with each other with nominal variation of cream deposition
to prevent smudging.
In the stencil type machine, the cream has to be in a pumpable consistency since the
cream is pumped (using precision positive displacement lobe pumps) into the stencil
assembly which extrudes through the nozzle ports (one port per row) provided in the
stencil assembly itself and wire-cut thereafter as the cream gets deposited in the bottom
shell. The lobe pump ensures that the variation in cream deposition is kept to a level of
about +/- 1.0%. However, since the cream is much softer in consistency, it tends to ooze
out of the shell periphery after sandwiching operation because of subsequent handling of
the sandwiched products for packaging operation and hence it becomes almost imperative
to use a Lane Multiplier and Cooling Tunnel post sandwiching in order to set the cream
to prevent any further cream flow.
US 3,776.185 discloses an apparatus comprises a conveyor for transporting confectionery
pieces in an equidistant arrangement along a guide path, a rotary cylinder rotatable at a
circumferential speed equal to the traveling speed of the confectionery pieces so as to
come into contact with the traveling confectionery pieces at a predetermined position and
formed with a number of apertures spaced apart by a distance equal to the space between
the traveling confectionery pieces, and a cream feeder disposed within the cylinder and
having outlets for supplying cream onto confectionery pieces through the apertures which
cream is forced into the feeder, whereby the area over which the cream is deposited on
the confectionery pieces and the amount of the cream are controlled.
US 5,974,958 discloses a cream depositing machine including a rotatable stencil drum (2)
having first and second stencil ports (3, 4), a device (5) for rotating the drum (2), a first
and second cream supply device (12, 13) for supplying first and second cream material
separately to the ports (3, 4), a cream control device (10, 16) within the drum (2) and
operable, in time sequence, to initially cause the first cream material to issue from the
first stencil port (3) and thereafter, after angular movement of the drum (2), to cause the
second cream material to issue from the second stencil port (4) whereby deposits of the
first and second cream material co-exist on the drum (2), and a device (15) for
simultaneously removing the co-existing deposits.
The disadvantage of the above-mentioned prior art is that the apparatus/machine is costly
and complicated as complex machining needs to be done i.e. the stencil assembly. In the
prior art stencil type machines two different creams are pumped from opposite ends of
the stencil, which is very complicated and cumbersome.
Moreover in order to produce plurality of cream biscuits, imported stencil type machines
are required with additional attachments for every shape of cream deposit, the capacity of
which perhaps not match the demand for such niche products. Even that too does not give
flexibility of producing any shape and size of two creams.
The prior art machines are difficult and complicated to operate and adjust the parameters
as Cream flow is adjusted with the help of shut off valve in the stencil and Cream is
injected by using pump and matching the wholes on stationary part and rotating
cylindrical stencil.
Further if plurality of creams are sought to be deposited by the prior art drum type
machines simultaneously depositing multiple non-intervening creams, it causes smudging
of plurality of creams even if multiple rotary bowls are mounted instead of one, as there
is no precision or control. Moreover it is not possible to fill different types of creams in a
single bowl yet getting discreetly positioned mutually exclusive non-overlapping cream
deposits because of the very basic simple design premise for cream deposition in the
single rotary bowl sandwiching machine.
Further in the prior art rotary bowl type machines during deposition of different creams in
non-conventional shapes like for example Split deposition, to avoid smudging it is
important to hold the bottom shells in same orientation. As the bottom shells travel on
the chain with the help of single pronged pin, the shells, if circular in shape, tend to rotate
about its own axis during the course of the travel. When the circular bottom shells rotate
even slightly after the first cream deposition, the second cream deposit would have
tended to smudge with the first one in view of the said rotation and would have resulted
into lack of precision.
Further the prior art machines chain sprocket type transmission mechanism had a large
tolerance in the design of the machine itself as the design and manufacturing tolerance of
sprocket is high and design and manufacturing tolerance of chain linkage is also high
which causes, smudging of cream in case of multiple cream deposition on to same bottom
shell. Precise control on the deposition of cream is of utmost importance in case of
multiple cream-deposits. The design for ensuring precision control on the cream
deposition quantum should be there.
Thus, there is need to change the transmission system in the conventional drum type
machine in order to achieve precision for deposition of plurality of creams on a single
shell.
Further the installation of individual drives for chains and drums or the installation of one
drive for chain and separate drive for bowl rotation and synchronizing both these drives
are difficult, and requires special skill set to operate and maintain the machine, making it
unviable considering the industry requirement.
Further the prior art stencil type machines have cream, which is much softer in
consistency; it tends to ooze out of the shell periphery.
Thus there is a need to provide an improved machine that has plurality of drums/bowls to
carry plurality creams and which is capable of depositing creams in discreet positions not
interfering with each other in different shapes and sizes without the variation of cream
deposition exceeding 8 to 9 % at maximum level in such a way that one type of cream
does not overlap with the other keeping the consistency of the cream at a proper level and
is with a simple design and working mechanism with proper transmission mechanism.
OBJECTS OF INVENTION
It is an object of the invention to overcome the disadvantages of the prior art.
It is another object of the invention to design an improved plurality of drum/bowl type
rotary bowl plurality cream sandwiching machine, which is capable of depositing
plurality of creams in different shapes and sizes.
Yet another object of the present invention is to design an improved machine, adapted to
deposit plurality of creams without smudging/overlapping.
Yet another object of the present invention is to design an improved machine, having
variation of cream deposition not exceeding 8 to 9 % at maximum level in such a way
that one type of cream does not overlap another type of cream and the machine is capable
of depositing cream sequentially.
Yet another object of the present invention is to design an improved machine without
smudging/overlapping of the plurality of different creams when the machine runs at a
minimum speed of 350 sandwiches/minute.
Yet another object of the present invention is to provide an improved machine, which is
cost effective, simple to use and design and suitable for low capacity.
Yet another object of the present invention is to provide a totally flexible sandwiching
machine, which even can be used for single cream deposit products & thereby not getting
dedicated to multiple cream deposit options alone.
Yet another object of the present invention is to design a rotary bowl machine with single
or multiple motor drive/drives, having reduced manufacturing tolerance of sprocket and
chain with greater precision to avoid smudging of creams.
Yet another object of the present invention is to design a machine, which will maintain a
proper cream consistency level such that there is no smudging/overlapping of the
different creams.
SUMMARY OF THE INVENTION
An improved rotary bowl cream sandwiching machine capable of depositing plurality of
creams in different shapes and sizes without the variation of cream deposition exceeding
8 to 9 % at maximum level said machine comprising:
plurality of rotating cream deposition bowl/drum means with plurality of cream outlets,
means for directing the cream to outlets comprising of plunger/knife assembly with
slotted dasher plate having the shape of a circular quadrant making a range of angle
varying between 80 60° and 100° towards the cream bowl centre in said bowl/drum
means;
at least one transmission means comprising plurality of the gear train means and track
means adapted for moving shells with creams deposited thereon so as to synchronize
their movement with those of the drums to allow deposition of creams without unwanted
overlap;
a driver means for driving/rotating said transmission means and plurality of drum means;
plurality of means of appropriate shape to hold the shells in appropriate position being
placed on the said transmission means;
means for controlling cream temperature in order to maintain appropriate consistency of
the cream and
means to reduce friction, placed in operative connection with the transmission means.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Figure 1 illustrates the whole machine layout with dasher plate assembly.
Figure 2 illustrates the transmission mechanism in the machine.
Figure 3 illustrates the detailed view of the drums with nozzles and the elevation of each
drum with spring-loaded plunger.
Figure 4 illustrates the detailed view of nozzle and nozzle along with the cream deposited
biscuit showing annular cream and concentric cream.
Figure 5 illustrates the Pin for holding the biscuit on chain.
Figure 6 illustrates the machine layout for controlling the increase in cream temperature.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is an advancement of the Rotary Bowl type wire cut machine. The
improved Drum type machine and comprises plurality of rotating drums which deposits
plurality of different types of cream on the same shell in different shapes and sizes.
The present sandwiching machine deposits creams of different shapes and sizes such as
one annular cream ring encircling another central cream circle, two different cream semi-
circles with a common diameter, shapes of two semi-circles, one circle inside a triangle,
one rectangle inside a triangle and so on and so forth.
The improved Rotary Bowl type machine comprises of the following as described below:
Plurality of rotating cream deposition bowl/drum means with plurality of cream
outlets/nozzles. The said nozzles are of particular shape in first bowl and of a
corresponding different shape in the next bowl and so on, so as to deposit cream of
desired plurality of shapes and sizes.
The means for directing the cream to outlets comprising knife/plunger assembly with
slotted dasher plate having the shape of a circular quadrant making a range of angle
varying between 60° and 100° towards the cream bowl centre in said bowl/drum means.
The transmission means which comprises of the plurality of the gear train means and
track means adapted for moving shells with creams deposited thereon so as to
synchronize their movement with those of the drums to allow deposition of creams
without undue overlap.
The Gear train means are plurality of spur gears that are used in the present invention for
proper mechanical transmission mechanism of the dual rotating drums.
The said track means comprises a track adapted to carry/move the shells in a continuous
motion, a chain (9) adapted to drive the said track placed beneath said track .plurality of
sprockets which are profiled wheel with teeth's adapted to mesh with said- chain ;a
stacker placed after the sandwiching station to stack the sandwiched biscuit on-edge and
thereafter delivering the stacked sandwiched products to a conveyor for subsequent
packaging operation.
A driver means is present for driving/rotating said transmission means and plurality of
drum means.
The means for controlling cream temperature in order to maintain appropriate
consistency of the cream which comprises of the air jacket with insulation covering each
plurality of rotating drums, flexible air duct having an inlet and outlet with insulation
adapted to maintain cream temperature by blowing cold air from the inlet in the annular
space of said cream drum, a rubber tip sealing placed in-between said drum and said air
jacket.
The means to reduce friction and vibration in the chain for carrying the shells are placed
in operative connection with the transmission means where the said means to reduce
friction are the Teflon guides.
The plurality of means of appropriate shape to hold the shells in appropriate position
being placed on the said transmission means where the appropriate shape of the said
means are semi circular shape pins (13) designed to hold the shells after first cream
deposition.
Precise deposition of plurality of creams in the same shell is achieved by precisely
matching the linear speed and peripheral speeds of chain carrying shell and the two
drums.
Gear trains means and chain sprockets have their own tolerances therefore it affects the
accuracy and precision in deposition of machine. The mentioned disadvantage is rectified
by usage of precision gears train, sprockets and chain. By reducing the tolerance of
sprockets, chain and using gear transmission mechanism, a smudge free plurality of
cream deposition product is obtained on the same shell.
The fairly easy control of the cream deposited sequentially, concentric/split deposition is
achieved by keeping the circumferential speed of the drums same to linear speed of
chain, and keeping the consecutive nozzles at the same arcal distance as the chordal
distance between two successive pins.
In order to have perfect directional synchronization of the cream getting wire-cut in the
subsequent bowl, the shell track is suitably curved post first cream deposit and the
fall/rise of the bottom support tracks properly designed.
In order to ensure minimum vibration of the chain (since the chain is about 18% longer
than the single bowl prior art machines) carrying the shells (to ensure no smudging of
creams of different colors/ flavors), number of Teflon guides has been provided under the
track to reduce the friction & vibration in the chain as well.
There is only one drive in the whole machine (Eg. 2.25 kW shaft mounted geared motor),
which drives the chain carrying the shells, the plurality of cream bowls and the stacker to
transfer the sandwiched biscuits on to a conveyor for subsequent packaging operation.
The track has been designed «-a to rise to bring the bottom shells closer to the nozzle tip
at the point of cream deposition in the first bowl and fall thereafter to clear the nozzle of
the second bowl as these shells approach for second cream deposit and rise thereafter
again to bring the first cream deposited bottom shells near to the second cream deposit
nozzle at the point of second cream deposition and again fall thereafter gradually for the
top shell transfer and while doing so, this track has been designed to curved post first
cream deposit for optimizing the linear distance between the two cream bowls.
In another embodiment of the present invention the same machine can be made out of
multiple drives e.g. one for the chain, one for first and second bowl and the other for the
stacker where each fitted with servo motor to ensure precision cream deposition.
Though plurality drum/rotary bowl sandwiching machine of the present invention is
described below with reference to the description and figure for dual cream deposit
machine, with dual cream, dual rotating drums where the first drum is driven with the
help of precision sprockets and chain, other machine with more than two drums/bowls for
deposition of corresponding types of cream are within the purview of the present
invention. The non limiting illustrative dual cream deposit machine, with dual cream is
described below with reference to the accompanying figures.
Figure 1 indicates the rotary bowl type (drum type) sandwiching machines ,where there
are two drums .drum 1 (l)and drum 2 (2) with spring-loaded plunger/knife (6), which is
used to deposit cream through nozzles. The said plunger knife helps in pushing the cream
of particular consistency through the nozzles. The amount to be pushed is critical so that
the deposit is appropriate in order to prevent overlap as well as prevent any gap.
The nozzle (3) and nozzle (4) along with the cream deposited biscuit showing anural
cream (3) and concentric cream (4) in the next drum.
The bowl has a knife (6) with a dasher plate(5), which is in shape of quarter of circle so
that cream gets densely packed just before entering the nozzleT This provides the amount
and thickness of the cream to be deposited with precision so that there is no overlap or
gap with the cream from next/previous bowl. This dasher has a rectangular channel
allowing the cream mass to flow through the same and the compression spring operated
knife (which is guided in another U shaped slotted track (10) and is at right angle to the
rectangular slot) opens the channel gateway after being pushed up by the adapter of the
nozzle which allows the squeezed cream to extrude through one nozzle (when it comes at
the point of cream deposition) out of twelve nozzles which are mounted in one bowl.
Since the bowl is in rotary motion, the cream after deposition in the bottom shell is wire-
cut by a stationary piano wire to release the trailing cream.
Further the driver means (7) present for driving/rotating said transmission means and
plurality of drum means.
Figure 2 indicates the transmission mechanism where the Gear train (8) means are
plurality of spur gears that are used in the present invention for proper mechanical
transmission mechanism of the dual rotating drums. Transmission of two of drums is
carried out with the help of a mechanism using the same motor (7), which is rotating the
first drum (1). more particularly the first drum is driven with the help of precision
sprockets and chain. The speed of all the rotating drums is same in order to achieve
smudge free deposition. The drive of the second cream bowl (2)is taken from the first
bowl by a system of gear train ensuring that both the bowls move at the same vectorial
linear speed.
The gears are made using the gear shaper with 25 micron tolerance in the diametral pitch
and the teeth are hardened. The spur gears used in this gear train are having module of 3.
The manufacturing tolerances of the sprockets (10) are reduced by using gear shapers,
which have greater precision. The tolerance is brought down to 25 micron level from 150
micron level.
The machine is equipped with a variable speed frequency controlled drive and the speed
is altered between 25 to 55 Hz seamlessly. However, corresponding to 50 Hz frequency,
the rotary bowl has 45 rpm. The range of speed of the bowls is 22.5 rpm to 49.5 rpm.
In the dual cream deposit machine, tolerance of the sprocket pitch (5/8" pitch) is brought
to a level of 25 micron level (instead of 150 micron as is being used in prior art) by using
Gear Shaper. The sprockets are normally machined from conventional machine tools (e.g.
lathe) and normally Gear Shapers are not used for making sprocket teeth, which required
a special cutter for 5/8" pitch. The wear and tear of the sprocket teeth is brought down to
minimum level by hardening the teeth as well.
The track (11) has been designed in-a to rise to bring the bottom shells closer to the
nozzle tip at the point of cream deposition in the first bowl and fall thereafter to clear the
nozzle of the second bowl as these shells approach for second cream deposit and rise
thereafter again to bring the first cream deposited bottom shells near to the second cream
deposit nozzle at the point of second cream deposition and again fall thereafter gradually
for the top shell transfer and while doing so, this track has been designed to curved post
first cream deposit for optimizing the linear distance between the two cream bowls.
The Stacker (12) placed in line with the chain post the sandwiching of the top shell with
the bottom shell after deposition of all the creams
Fig 3 shows the drums with the nozzles where (1) indicates the first cream deposition
drum which deposits the cream annular portion of cream, (2) indicates second cream
deposition drum, which will deposit the cream in annular shape of first cream. (3)
indicates nozzle for annular deposition being present in first drum , (4) indicates nozzle
for concentric deposition in the next drum, (9) indicates the chain.
The two rotary bowls with individual set of nozzles where the apertures are designed to
meet the individual cream deposit specifications. The bottom shells of the sandwiched
shells fed from the first feeding magazine are carried by chain with pins. Cream is first
deposited on each of these bottom shells as these come under the first rotary drum nozzle
post wire cutting. As they travel to the next rotary cream drum, the second cream is also
deposited. The synchronization of these two cream deposits with respect to the deposit
positions on the bottom shells are perfectly timed using the set of precision gears train
means, which control smudging of one cream with the other.
Post the second cream deposit, the top shells of the sandwiched shells are placed on the
cream deposited bottom shells and subsequently this is pressed by using a system of
spring pressure to match with the final product specification.
Further the variation in cream deposition quantum through this type of wire-cut
sandwiching machines in the current design even exceeds 18 to 20% with single drum
machines.
Fig 3 further shows the elevation of the drum with spring-loaded plunger/knife (6), which
is used to deposit cream through nozzles. The said plunger knife helps in pushing the
cream of particular consistency through the nozzles. The amount to be pushed is critical
so that the deposit is appropriate in order to prevent overlap as well as prevent any gap.
Fig 4 indicates the detailed view of nozzle (3) and nozzle (4) along with the cream
deposited biscuit showing anural cream (3) and concentric cream (4) in the next drum.
Fig 5 indicates the semi circular Pin (13) for holding the shells. The said pins provide the
guidance to the shell so that they do not rotate/topple when they are moving from one
nozzle of 1st drum to the corresponding nozzle of the next drum in order to maintain the
precision of deposition.
Figure 6 indicates machine layout for controlling the increase in cream temperature .The
causes of higher cream percentage variation in rotary bowl type sandwiching machine as
compared to stencil types are constant rotary motion of the cream bowl impart the added
mechanical work to get dissipated in terms of heat energy which increases the cream
temperature and thereby changing the cream viscosity impacting the quantum of cream
deposit.
The increase in cream temperature because of rotary bowl/drum motion is ameliorated by
blowing cold air in the annular space created in the cream bowl outer surface by jacketing
the same suitably by the means for controlling the increase in cream temperature
indicated in figure 6. The cold air is blown into the inlet (A) which passes through the air
jacket (C) and passes out through the outlet (A). The PUF insulation on the out side of the
air jacket help to maintain the temperature so that air jacket encircling the bowl keeps it
cool. As a result the thick consistency of the cream is maintained even though the
churning of the cream in the bowl so as to push it through the nozzle tends to increase the
temperature and hence make the cream less viscous. Since the thick consistency of the
cream is maintained by such cooling effect the cream is of appropriate consistency to be
deposited and hence prevent overlap with the cream from the next/previous bowl.
The main Advantages of this invention is as follows:
The machine is capable of depositing plurality of different flavor/colour creams thus
enabling consumer to enjoy plurality of flavors and colours in the same
confectionary/bakery product and plurality of different color and flavor cream makes
product more attractive.
Further there is no smudging/overlapping of the plurality of different creams when the
machine runs at a minimum speed of 350 sandwiches/minute.
We Claim:
1. An improved rotary bowl cream sandwiching machine capable of depositing
plurality of creams in different shapes and sizes without the variation of cream
deposition exceeding 8 to 9 % at maximum level said machine comprising:
plurality of rotating cream deposition bowl/drum means with plurality of cream
outlets.
means for directing the cream to outlets comprising knife/plunger assembly with
with slotted dasher plate having the shape of a circular quadrant making a range
of angle varying between 8060° and 100° towards the cream bowl centre in said
bowl/drum means;
at least one transmission means comprising plurality of the gear train means and
track means adapted for moving shells with creams deposited thereon so as to
synchronize their movement with those of the drums to allow deposition of
creams without unwarranted overlap;
a driver means for driving/rotating said transmission means and plurality of drum
means;
plurality of means of appropriate shape to hold the shells in appropriate position
being placed on the said transmission means;
means for controlling cream temperature in order to maintain appropriate
consistency of the cream and
means to reduce friction placed in operative connection with the transmission
means.
2. An improved rotary bowl cream sandwiching machine capable of depositing
plurality of creams in different shapes and sizes without the variation of cream
deposition exceeding 8 to 9 % at maximum level said machine comprising:
plurality of rotating cream deposition bowl/drum means with plurality of cream
outlets.
means for directing the cream to outlets comprising knife/plunger assembly with
with slotted dasher plate having the shape of a circular quadrant making a range
of angle varying between 8060° and 100° towards the cream bowl centre in said
bowl/drum means;
at least one transmission means comprising plurality of the gear train means and
track means adapted for moving shells with creams deposited thereon so as to
synchronize their movement with those of the drums to allow deposition of
creams without unwarranted overlap;
multiple driver means for driving/rotating said transmission means and plurality
of drum means;
plurality of means of appropriate shape to hold the shells in appropriate position
being placed on the said transmission means;
means for controlling cream temperature in order to maintain appropriate
consistency of the cream and
means to reduce friction placed in operative connection with the transmission
means.
3. The machine as claimed in claim 1 or 2 wherein said dasher plate is placed at 9©
75° in the bowls/drums to avoid overlapping /smudging of the plurality of creams.
4. The machine as claimed in claim 1 or 2 wherein the said plurality rotating cream
deposition drums comprise the first cream deposition drum, which deposits the
cream in appropriate shape with appropriate size and next cream deposition drum,
which deposits the cream in another appropriate shape and size.
5. The machine as claimed in claim 1 or 2 wherein the said track means comprises
a track adapted to carry/move the shells in a continuous motion ;
a chain adapted to drive the shells on the said track placed beneath said track ;
plurality of sprockets which are profiled wheel with teeth's adapted to mesh with
said chain links;
a stacker placed in line with the chain post the sandwiching of the top shell with
the bottom shell after deposition of all the creams;
a conveyor to transfer the stacked sandwiched biscuits on-edge position for the
subsequent packaging operation.
6. The machine as claimed in claim 1 or 2 wherein the said gear train means
comprise of plurality of spur gears having 25-micron tolerance and module of 3.
7. The machine as claimed in claim 6 wherein the said plurality of spur gears are
adapted to drive the first drum with the help of precision sprockets, chain and the
next drum is driven from the drive of the first drum through a gear train.
8. The machine as claimed in claim 7 wherein said sprockets has a 5/8" pitch and
tolerance brought down to a level of 25 micron.
9. The machine as claimed in claim 1 wherein the said driver means comprise of
shaft mounted geared motor driver adapted to drive the said chain carrying the
shells, the rotating cream drums and the stacker to transfer the sandwiched
biscuits on to a conveyor for subsequent packaging operation.
10. The machine as claimed in claim 1 or 2 wherein the said plurality of outlet means
for supplying creams to the shells comprise nozzles assemblies, nozzle assemblies
for one type of shape and size deposition being present in first drum and another
set of nozzle assemblies for another corresponding type of shape and size
deposition in the next drum so as to deposit cream of appropriate shape and size
on the bottom shell without gap yet without overlap.
11. The machine as claimed in claim 1 or 2 wherein said means to hold the shells in
proper position comprise semi circular shaped pins that are adapted to hold and
guide the shells on said chain/ track means (please confirm - confirmed).
12. The machine as claimed in claim 1 or 2 wherein said means for controlling the
increase in cream temperature comprises:
Chilled air jacket with insulation covering each plurality of rotating drums;
flexible air duct having an inlet and outlet with insulation adapted to maintain
cream temperature by blowing cold air from the inlet in the annular space of said
cream drum ;
a rubber tip sealing placed in-between said drum and said air jacket.
13. The machine as claimed in claim 1 or 2 wherein said means to reduce friction and
vibration comprise of Teflon guides adapted to reduce vibration of the shells
placed underneath the said chain.
14. The machine as claimed in claim 4 wherein said rotating drums have the number
of full rotations completed in one minute around a fixed axis, in a range of 22.5
rpm to 49.5 rpm, preferably 45 rpm.
15. The machine as claimed in claim 14 wherein said rotating drums have rotating
speed between 25 to 55 Hz seamlessly, preferably 50 Hz frequency.
16. The machine as claimed in claim 5 wherein said track alternately rises and falls
so as synchronise the bottom shells closer to the nozzle tip at the point of first
cream deposition in the first bowl and second cream deposition from second
bowl and again fall thereafter gradually for the top shell transfer in a manner such
that the track is curve post first cream deposit for optimizing the linear distance
between the two cream bowls. -
17. The machine as claimed in claim 1 or 2 wherein the said machine runs at a
minimum speed of 350 sandwiches/minute.
18. The machine as claimed in claim 2 wherein said multiple driver means comprise
plurality of drivers one for the chain, one for first and second bowl and the other
for the stacker, each fitted with servo motor to ensure precision cream deposition.
19. An improved rotary bowl cream sandwiching machine capable of depositing
plurality of creams in different shapes and sizes, said machine as herein
substantially described and illustrated with reference to the accompanying
drawings.

An improved plurality rotary bowl cream sandwiching machine capable of depositing
plurality of creams of different shapes and sizes on confectionary/bakery products. The
said machine has drive (s) to rotate the said bowls/drums in a manner such that one type
of cream does not overlap with the others comprising plurality of rotating cream
deposition bowl/drum means with plurality of cream outlets, means for directing the
cream to outlets comprising of plunger/knife assembly with slotted dasher plate having
the shape of a circular quadrant making a range of angle varying between 60° and 100°
towards the cream bowl center in said bowl/drum means, at least one transmission means
comprising plurality of the gear train means and track means adapted for moving shells
with creams deposited thereon so as to synchronize their movement with those of the
drums to allow deposition of creams without unwanted overlap, driver(s) means for
driving/rotating said transmission means and plurality of drum means.