Package making – Apparatus for forming or partially forming receptacle and... – Forming a pocket – depression – or hollow compartment by...
Utility Patent
1999-06-07
2001-01-02
Vo, Peter (Department: 3721)
Package making
Apparatus for forming or partially forming receptacle and...
Forming a pocket, depression, or hollow compartment by...
C053S282000, C137S595000, C251S005000
Utility Patent
active
06167683
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a packaging device, and particularly to a packaging device for forming a plastic case to receive fillings during the packaging process.
2. Description of Prior Art
In general, it is known to fill small plastic cases each formed as one of a plurality of concave cavities and then apply an aluminum foil to seal each cavity. In the prior art, the plastic cases are finished in advance then the plastic cases are taken to another device where they are arranged on a moving belt that passes a material filling station. The plastic cases are positioned below a material filling opening and liquid filling material is poured into the concave cavities of the plastic cases. An aluminum foil is then adhered over the plastic cases to seal off the cavities. It is appreciated that in the current technology, since the devices for filling material and packing plastic case are two separate devices, the process for packaging is inconvenient and the overall speed is slow. Moreover, since the filling material is liquid, in general, plug pumps are used for containing and extruding the filling material. The plug pump each fill one cavity at a time, thus at least one bank of plug pumps are necessary at a material filling station. With only one bank of cavities filled at a time, and the filling speed is slow. If it is desired to increase the filling speed, multiple banks of plug pumps can be installed, but the structure of the plug pump is complicated. It has a larger capacity and is inconvenient to mount, and the price is expensive. Further, during extrusion of the filling material, the liquid material must flow through the plug pump so that the material will contact with inner parts of the pump and may be polluted by the device, or the pump may be polluted by the filling material and be destroyed. Also, the filling liquid often contains particle material which easily accumulates in a sliding section between the plug and the piston of the pump so that the sliding of the plug may fail.
A pressing plastic sealing means is required, for sealing the plastic casing with an aluminum foil layer, and a template on a machine table. A pressing plate is arranged above the template for transferring the plastic cases and the aluminum foil between the template and the pressing plate. The position and shape of the cavities are aligned with holes in the template so that the aluminum foil is pressed to the plastic case by the pressing plate to seal the cavities. In order to extract a filling from the cavities, a foldable line is provided in the cavities so that a user may remove a filling by breaking the casing along the fold line. Fillings in other cavities are retained. However, the contact plane between the template and the pressing plate is not a complete plane, and the material of the plastic case and the aluminum foil is very thin. During pressing, some gaps will exist in some parts of the plastic case and the aluminum foil and thus the aluminum foil cannot be pressed completely against the plastic case. Some aluminum foil will be adhered to the plastic case, so that two adjacent concave holes cannot be isolated completely, and thus the filling of one cavity may flow to another adjacent cavity. As a result, an unsatisfactory packaging is produced. For sealing over a large area, a complete plane is very difficult to achieve. Moreover, in the process, a heating step is necessary. This causes the deformation of a real plane, and complete sealing cannot normally be attained.
SUMMARY OF THE INVENTION
According to the invention there is provided a packaging device for continuously forming and filling a package having a plurality of separated sealed cavities comprising, arranged in sequence, a plastics film winding barrel, a vacuum cavity forming device, a filling means, an aluminum winding barrel and a pressing sealing means, in which a sheet of plastics film is fed through the device, formed with a plurality of rows of cavities across its width, the cavities are filled, an aluminum foil is placed against the sheet to close off the cavities and sealed to the sheet to form the packaging.
The packaging device may include a cooling device to cool the packaging and a cutting machine to cut the cooled packaging into suitable strips.
One embodiment of the invention comprises a packaging device for forming and filling a package having a plurality of separate sealed cavities comprising a plastics film winding barrel, a vacuum cavity forming device, a filling means, an aluminum foil winding barrel, a pressing sealing means and a cutting machine, which are sequentially arranged on a machine table, wherein the plastic film winding barrel is mounted at a front of the machine table;
the vacuum cavity forming device is mounted next to the plastic film winding barrel, and a heater is mounted between the vacuum cavity forming device; and the plastics film winding barrel,
the filling means is mounted next to the vacuum shaping device, the filling means having an upper substrate being arranged with a pressing plate movable upwards and downwards and a plurality of through-holes, each of the through-holes has a material inlet and a material outlet, a bottom of the pressing plate is provided with a plurality of soft plastic covers corresponding to each through-hole, the soft plastic cover being firmly secured above each through-hole, the material inlet and the material outlet have respective flexible tubes below the through-holes of the upper substrate and pass through the lower substrate, two overlapped comb clip valves are arranged on the lower substrate, the comb clip valve being formed by a fixed comb clip and an movable comb clip, the movable comb clip is driven by a hydraulic piston, the fixed comb clip and the movable comb clip are arranged with a plurality of clamping pins on one side or both sides of respective long seats, the clamping pins of the fixed comb clip and the movable comb clip being arranged alternatively in a plane, the flexible tubes of the material inlet and the material outlet pass through between the two clamping pins of the fixed comb clip and the movable comb clip;
the aluminum foil winding barrel is mounted next to the filling means,
the pressing plastic sealing means is mounted beyond the aluminum foil winding barrel, the pressing sealing means is formed with a substrate on the machine table, a soft pad is installed above the substrate, and a plurality of parallel connecting blocks are installed thereon, each of the connecting blocks are penetrated by at least two transversal rods, each transversal rod passes through a lower template formed by a plurality of sub-templates, an upper template is mounted above the lower template on the machine table so that the upper template can press against the lower template, a cooling device is mounted beyond the pressing plastic sealing means; and
the cutting machine is mounted beyond the cooling means; the cutting machine being formed by a corner cutting machine and a cutting knife machine.
REFERENCES:
patent: 4120984 (1978-10-01), Richardson et al.
patent: 4233801 (1980-11-01), Watt
patent: 4565052 (1986-01-01), Hautemont
patent: 4907394 (1990-03-01), Tschepke
patent: 5009056 (1991-04-01), Porteous
patent: 5319910 (1994-06-01), Takata et al.
Desai Hemant M.
Jackson Walker L.L.P.
Kyorin Group (China) Ltd.
Vo Peter
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