Conveyors: power-driven – Conveyor arrangement for selecting among plural sources or... – By moving a load directing means along the length of the...
Patent
1998-02-21
2000-02-22
Bidwell, James R.
Conveyors: power-driven
Conveyor arrangement for selecting among plural sources or...
By moving a load directing means along the length of the...
198597, B65G 3700
Patent
active
060269472
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention refers on the one hand, to an apparatus for transferring an irregular stream of objects from a first conveyor to a second conveyor in such a way that the objects form a regular stream of objects on the second conveyor, wherein the first conveyor operates with a higher conveying speed than the second conveyor and for some distance in parallel with said second conveyor, and on the other to a method for accomplishing said transferring.
BACKGROUND OF THE INVENTION
The state of the art comprises many examples of machines which operate according to the principle that an irregular flow of objects, e.g. fishes, are to be synchronised to the pace of a conveyor.
Industrial handling of easily damaged objects may however be difficult to automatize. One example of such an activity is the handling of small types of fish, e.g. herring within the canning factories. Because this type of fish has a very thin and fragile skin, it is not possible to use down-scaled versions of machines for handling larger types of fish.
One reason for this is that these machines use means for synchronization the conveying of the fish to equipment for singular processing of each fish. For example, such a machine may be adapted for loading fish one by one in trays on a conveyor which conveys the fish in the trays along means for decapitating fish heads and for removal of intestines. The means for synchronization the conveying of the fish to said trays may comprise rotating brushes, barbed wheels, or means for driving the fish by pinching it. These means are thus used for retarding and accelerating single fish and if the fish comprises small fish, this handling often lead to quality-reducing damages on the fish. A contributing reason for this, is that is that small fish, e.g. small herring, varies considerably in size and they are therefore difficult to handle mechanically.
THE TECHNICAL PROBLEM
One purpose of the present invention is therefore to provide an apparatus according to the above which fulfils demands for high capacity and for careful handling of the objects.
THE SOLUTION
For this purpose, the apparatus according to the invention is characterized in deflection means for movable deflection of objects between the two conveyors, which deflection means is provided with means for synchronization with the movement of the second conveyor. The method according to the invention is characterized in that the objects are transported at a higher speed on the first conveyor than on the second conveyor, that the objects during transfer from the first conveyor is deflected from said conveyor over to the second conveyor, and that deflection of objects from the first to the second conveyor occurs at various points along said distance, depending upon how closely the objects are transported upon the first conveyor.
DESCRIPTION OF THE DRAWINGS
The invention will be described hereinafter with reference to embodiments shown in the enclosed drawings, wherein
FIG. 1 shows a first, schematically depicted variant of the apparatus according to the invention in a horizontal projection,
FIG. 2 shows in more detail in a perspective view a second variant of the invention,
FIG. 3 is a section along the line III--III in FIG. 2, and
FIG. 4 shows a section of still another variant of the invention in a side view.
DESCRIPTION OF EMBODIMENTS
The following embodiments are adapted for handling fish, but other areas of application are naturally possible, e.g. handling of fruit or vegetables.
The apparatus schematically shown in FIG. 1, comprises a first endless conveyor 10, which operates in the direction of the arrow 11, and a second endless conveyor 12, which operates in parallel with said first conveyor, but in the direction of the arrow 13.
The first conveyor 10 operates with a higher conveying speed than the second conveyor 12, which means that the fish 14 move with a higher speed on the conveyor 10 than on the conveyor 12. Also, they move in an irregular flow, so that several fish may be conveyed in close fil
REFERENCES:
patent: 3771648 (1973-11-01), Revuelta
patent: 3823811 (1974-07-01), Brockmuller
patent: 4469319 (1984-09-01), Robb et al.
patent: 4754864 (1988-07-01), Cross, Jr.
patent: 4889223 (1989-12-01), Bergstrom
Bidwell James R.
Fasth Rolf
Swedefish Machinery AB
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