Fluent material handling – with receiver or receiver coacting mea – Processes – Battery grid pasting
Patent
1981-06-17
1983-06-14
Schmidt, Frederick R.
Fluent material handling, with receiver or receiver coacting mea
Processes
Battery grid pasting
141 34, 141163, 141164, 141191, 198480, 414224, B65B 304, B65B 114
Patent
active
043877478
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to methods and apparatus for the filling of a succession of substantially identical containers with a flowable product, the method comprising rotating each container along a circular path about an axis of rotation remote from the container whilst introducing the flowable product into the container through an open end thereof from a filling head rotating with the container. Such a method will be called herein a "rotary filling method".
The apparatus to which the invention relates is for performing such a rotary filling method, and comprises a main turret, drive means for rotating the main turret continuously about its own axis, and a plurality of container holding means carried peripherally by the main turret, the main turret having the same plurality of container filling heads, for introducing the flowable product into a container held by the holding means and moving along the said circular path. Such an apparatus will be called herein a "rotary filler".
It will of course be understood that the term "container" herein means a vessel having an open end and a closed end, intersected by a central axis of the container. The container for the purposes of the invention is typically cylindrical, and is preferably a metal can, but it may instead be of any other axisymmetrical shape, e.g. frusto-conical or of a so-called "irregular" cross-section such as oval.
BACKGROUND ART
Rotary fillers and filling methods, both within and outside the above definitions, are commonly in use for the filling of containers of many different kinds, with flowable products which may be in the form of free-flowing (low-viscosity) liquids, viscous liquids such as paint, dry solids in powder or granular form, or products containing both solid and liquid. Although the present invention is applicable to all kinds of flowable product and to most kinds of container, it is concerned primarily with the solution of a problem which is found to arise only where high-speed filling is required. Many container filling operations do not call for high filling speeds, and, indeed, a very great variety of products is introduced into containers, such as cans, bottles, flexible tubes, large tins etc., by relatively low-speed fillers whose operation is rotary (in the sense that a succession of containers is moved along a circular path by a turret, and filled during this movement) but which normally have stationary filling heads so that the turret is moved by an indexing mechanism from one station to another in intermittent motion. Such machines are outside the scope of this application and are mentioned only in order to help identify the field of the present invention, which is concerned with high-speed fillers having continuously-rotating filling heads operating on containers which are themselves in continuous rotation.
In a typical rotary filler, of known kinds, whether or not falling within the definition of a rotary filler as set forth hereinbefore, the main turret rotates about a vertical axis and the containers to be filled are carried upright, with their open ends at the top, on and by the rotating turret. Filling takes place primarily by gravity in the case of solids or unpressurised liquids. In the case of liquids to be introduced into the container under pressure (for example beer and other carbonated drink products), the filling head engages against the open end of the container so as to form a pressure seal during the filling operation. Whilst this system works quite satisfactorily at low speeds, problems arise if the speed is increased. In high speed, nonintermittent, rotation, the influence of centrifugal force on the liquid in the container becomes more significant, and the maximum speed of rotation obtainable in practice is consequently limited by the tendency of this force to cause spillage of the liquid at the instant at which the container is transferred to a linear or rotary conveyor leading from the filler to the next stage, which is a closing machine for closing the container. This effe
REFERENCES:
patent: 2444155 (1948-06-01), De Back
Franek Josef T.
Porucznik Paul
Styles Alan E.
Metal Box Limited
Schmidt Frederick R.
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