Material or article handling – Load-transporting type vehicle and external means... – Power-driven conveyor for loading a wheeled vehicle
Reexamination Certificate
1999-12-01
2001-11-06
Ellis, Christopher P. (Department: 3651)
Material or article handling
Load-transporting type vehicle and external means...
Power-driven conveyor for loading a wheeled vehicle
C406S039000, C406S112000, C406S153000, C406S197000, C406S198000, C414S809000
Reexamination Certificate
active
06312207
ABSTRACT:
The invention relates to a method for treatment of blowable thermal insulation, whereby thermal insulation, such as woodfiber wool, cellulose wool, mineral wool, glass wool and/or like is being led by means of one or several filling means to a transport space, such as a container or like, the internal volume of which may be changed, in order to transport thermal insulation in the transport space to its destination of use and to unload same from the transport space to a reception point essentially by blowing carried out by a blow arrangement. During filling of the transport space thermal insulation is being led to a filling space, that is limited from the transport space by means of a filling device, which filling space is being expanded known as such along filling of same by moving the filling device in the transport space in the longitudinal direction of same towards unloading end of same.
The type of method and device particularly for packing cellulose wool in a transport space and unloading from same as described above is previously known from Finnish Patent No. 84998. According to this solution cellulose wool is being led to a transport container at its manufacturing density e.g. directly from a manufacturing process by means of an air flow through an opening existing at the roof of the container. Inside the container there is a compressing and unloading device, which first of all compresses cellulose wool at a packaging density that is higher than its manufacturing density and on the other hand while unloading of cellulose wool from the transport space brings same to an essentially lower operational density than the packing density, in order to transport cellulose wool furthermore to its destination of use. The compressing and unloading device comprises a piston-like wall surface, which moves inside the transport space in the longitudinal direction of the same and the meaning of which is to bring cellulose wool to the packing density by pressing same and to unload cellulose wool furthermore from the transport space to the destination of use by exploiting a mechanical tearing and carding arrangement existing in connection with the same. The tearing and carding arrangement comprises a conveyor, that lifts cellulose wool from below upwards, to which there has been attached furthermore several separate tearing and carding means. In the solution above furthermore guiding means are being exploited for guiding movement of the compressing and unloading device inside the container, that is carried out by hydraulic cylinders in order to bring about an appropriate transportation density of the thermal insulation.
Several problems are related to the solution above, that is why it has not been exploited too much in practice. One basic problem is that, that cellulose wool is being blown to the container, which causes first of all disproportionately much dusting. On the other hand it is impossible to compress cellulose wool being blown to the container efficiently enough in practice by the type of principle described above, because it is first of all difficult to press together cellulose wool material, that has been blown to a particularly high heap. The solution above is bad for that reason as well, that the charging hole is at the center of the container, that is why the container must be filled over more than half of its volume before it is possible to compress contents of the same or otherwise the heap being formed at the center of the container must be pressed at the back part of the container, which requires interrupting feeding of cellulose wool to the container. The type of compression packing is thus not advantageous to be used in connection with cellulose wool for that reason, that cellulose wool can not be packed homogeneously enough, but instead the density of cellulose wool varies disproportionately much in the container. This naturally causes problems during unloading phase of the container also, whereby the unloading device may take e.g. a so called miss hit at places where cellulose wool is scarcer. Several problems are also involved with the unloading and blowing arrangement being exploited in the solution in question, one of the most crucial of which may be mentioned disproportionately high formation of dust. In addition to that the solution in question is based on a hydraulically used unloading device, the movement of which requires relatively complicated hydraulics with pipes and actuator cylinders. This type of device makes also the operating efficiency worse by decreasing the potentially effective transport space of the container, because of excessive need for room of the device in question.
On the other hand in Finnish Patent FI 61935 there has been presented a method and device, that is meant particularly for filling particularly a longitudinal space with insulative particle-like material. In this connection there has not, however, actually been represented the present invention or either a solution, that could be exploited for similar purpose, that would be meant particularly for feeding blowable thermal insulation into a transport space, in order to transport same in the transport space to its destination of use and for unloading same from the transport space furthermore at the reception point.
The method according to the present invention is aimed to achieve a decisive improvement in the problems described above and thus to raise essentially the level of prior art in the field. To achieve this aim the method according to the invention is primarily characterized by, that thermal insulation is being led to the filling space by means of a mechanical filling means, such as a screw or scraper conveyor and/or like, that is led through the filling device, that closes the transport space in an essentially vertical direction.
As the most important advantages of the method according to the invention may be mentioned simplicity, reliability and environmentally friendliness of its use as well as of those device solutions suitable for the same, which enables thus transportation of thermal insulation, which is nowadays usually packed separately by one-off packing, advantageously directly by container transportation without any intermediate packing stages and costs. Thanks to the method it is furthermore possible to pack blowable thermal insulation to be transported very homogeneously. The method according to the invention enables also as efficient exploitation of the internal space of the container as possible, because the apparatus applying the method according to the invention does not take very much room inside the container. The method according to the invention is advantageous with a view to usage also in such respect, that it does not require any kind of operational interruptions during filling stage in order to achieve an adequate transportation density of thermal insulation, because this effect may be carried out simultaneously during filling of the container so to say automatically, when the filling space limited by the filling device gets larger advantageously directly by pressure influence of thermal insulation being led already to the filling space. Furthermore as an advantageous embodiment the thermal insulation is being led to the filling space by means of a mechanical filling means, such as a screw conveyor or like, whereby dusting problems that are typical to present solutions may be avoided. When exploiting the method advantageously, an internal unloading arrangement is being used as well, that is placed totally inside the container in a way, that thermal insulation to be unloaded is being blown directly from inside of the container to the reception point by means of the blow device.
In this connection there are reasons to point out furthermore the fact, that such an advantageous way of action of the present invention, that the filling device is being moved by pressure influence of thermal insulation being led already to the filling space, may be carried out in a technically functional way particularly for the part of the thermal insulation being handled i
Connolly Bove & Lodge & Hutz LLP
Dillon, Jr. Joe
Ellis Christopher P.
Termex-Eriste Oy
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