Agitating – Method
Reexamination Certificate
1999-12-16
2002-09-17
Cooley, Charles E. (Department: 1723)
Agitating
Method
C366S213000, C422S270000
Reexamination Certificate
active
06450681
ABSTRACT:
The invention relates to a process for dissolving albumin flakes in a liquid and an arrangement for carrying out the process.
In the pasteurized final filling of human albumin, flake formation is often observed. These flake-containing preparations are not marketable and are therefore sorted out in the visual final check of manufacture. The containers at fault, in particular bottles, are opened manually and the contents are emptied into a collecting container. The albumin solution is then filtered to remove flakes. The filtrate is filled into bottles again as in the above manufacturing process and sealed, pasteurized and visually checked. By far the major part of the worked-up albumin solution is free of flakes and can be further processed in the packing line. The working-up of flake goods is personnel-intensive, causes additional costs due to the loss of valuable material and the consumption of primary packaging materials and aids, and increases the amount of waste obtained in the form of used primary packaging materials, filters and wash solutions. In the visual check, flake material assessed as false-negative is the subject of complaints by the customer, leads to returns and can moreover adversely affect the company's image on the market.
It is the object of the present invention to indicate a simple, highly effective process for dissolving albumin flakes in a liquid and an arrangement of constructionally simple design for carrying out the process.
The invention proposes a process for dissolving albumin flakes in a liquid which is filled into a container in such a way that the flakes and the liquid are moved relative to one another.
Within the meaning of the invention, the crucial factor for the kinetics of the dissolution of the flakes in the liquid is the movement of the flakes relative to the bulk of the liquid. In liquids which are filled into bottles, a high relative velocity is in particular guaranteed by rotation of the bottles around their longitudinal axis at a high speed of rotation. On account of the inertia, the velocity difference is the greatest shortly after the beginning of the rotation and directly after the braking of the bottles. The greatest prospects of success for the dissolution of albumin flakes thus consist in the rapid acceleration of the bottles to high speeds of rotation and subsequent rapid braking.
Preferably, the containers are rotated in a horizontal position, as by this means wetting of the entire inner surface, including the stopper, sealing cap or the like is guaranteed.
The repeated acceleration of the bottles can be carried out in the same direction of rotation or alternatively in the opposite direction of rotation, preferably in the opposite direction of rotation.
The invention is not restricted to rotation of the containers or bottles, but the dissolution of the albumin flakes can be carried out by exclusively translational movement with acceleration and braking phases, optionally by a translational movement in opposite directions.
The arrangement for carrying out the process according to the invention has at least the following features:
a constructional embodiment which permits a number of containers to be treated simultaneously by the process according to the invention,
one or more motors for driving the construction elements, which move the containers in a rotary or translational motion during the treatment.
It is in particular intended thereby that the containers are of rotationally symmetrical form, in particular bottles.
According to a particular embodiment of the arrangement according to the invention, it is intended that a number of treatment positions are coupled to a multi-positional unit. The treatment positions are preferably arranged next to one another in a plane. The support elements of the treatment positions are to be chosen in their length and in their separation such that the containers can be contained securely and preferably in the lying position between support elements which are in each case adjacent. The supports for the containers to be treated are of rotationally symmetrical design, preferably rollers, cylinders or collars. The ends of the axes of the support elements are contained in suitable bearings, e.g. roller or slide bearings. The treatment sites are composed of driven and loose rollers. To carry out the process according to the invention, the containers lie on one driven and one loosely supported roller in each case. According to a preferred embodiment, it is proposed to choose the division of the treatment unit and the arrangement of the driven and the loose rollers such that two containers can be set in rotation by one driven roller in each case. The composition of the driven rollers is chosen in such a way that an adequate coefficient of friction to drive the containers by means of the rollers results.
This is effected by the construction of the driven rollers from a suitable material or by coating of the rollers with a suitable material or by the application of suitable elements, for example O-rings or circular cord rings of a suitable material, preferably of an elastomer. The coupling of a number of driven rollers with one another and with the drive motor is effected by means of a suitable frictional connection, for example by means of connecting elements such as gears, chains or drive belts, preferably via toothed belts. The drive motor used is an electric motor, preferably with a switchable sense of rotation and with a controllable speed of rotation. The switching-on time, direction of rotation and speed of rotation of the motor are advantageously controlled by means of an automatically operating control unit.
The apparatus according to the invention is not restricted to a design having six treatment sites.
It is also intended for the arrangement of a number of partial treatment units over one another, next to one another or behind one another.
It is also intended for the arrangement of a number of single-site or two-site treatment units each having a separate drive motor.
It is also intended for the combination of the treatment units with automatically operating feeding and removal stations.
It is also intended for the combination of a treatment unit with an apparatus for the simultaneous further transport of the containers.
Further features of the invention are shown in the subclaims, the description of the figures and the FIGURE itself, it being noted that all individual features and all combinations of individual features are essential to the invention.
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European Patent Office Search Report dated Dec. 20, 2001.
Nettelhoff Hubert
Römisch Jürgen
Aventis Behring GmbH
Cooley Charles E.
Finnegan, Henderson Farabow, Garrett and Dunner L.L.P.
Sorkin David
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