Dispensing – Processes of dispensing
Patent
1992-11-04
1994-09-20
Kashnikow, Andres
Dispensing
Processes of dispensing
222203, 222490, B65D 8306
Patent
active
053481887
DESCRIPTION:
BRIEF SUMMARY
In the chemical and biochemical industries and in chemical and biochemical laboratories one is repeatedly faced with the task of having to dose minute quantities of powdery or granulate substances. Dosing in the gram, milligram or microgram range is necessary, for example, in order to fill substances for sale in suitable package receptacles or for use in suitable laboratory vessels. The substances in question may be substances used in chemical or biochemical manufacture, in chemical or biochemical research, or as active ingredients in medicine.
The problem does not lie in measuring the weight, as there are extremely high-precision scales available for the aforementioned weight range, but rather in filling these minute quantities in the intended receptacles or vessels in a controlled manner.
The following possibilities presently exist for micro-dosing.
One manual dosing possibility is offered by using laboratory, spoons and funnels. A funnel is inserted into the vessel into which a substance is to be filled. A certain quantity of the substance is picked up using a laboratory spoon, whose size depends on the quantity to be filled, and slowly emptied from the spoon into the vessel, which is deposited on a scale, until the fill quantity attains the weight desired. The rate of flow of the substance on the spoon is regulated by changing the angle of the spoon. The substance is activated by tapping one's finger against the spoon. For mechanical micro-dosing there are units which feature vibrating grooves or rotating cylinders which transport the substance.
Manual dosing using a laboratory spoon and funnel is extremely time-consuming and tedious. Overdosing is frequently the result and the dosing sequence has to be begun anew. The design of existing units for mechanical micro-dosing is extremely complex. As a consequence, the units are prone to malfunction. In addition, several unit components come into contact with the substance which have to be accordingly cleaned subsequent to use.
The intention behind the invention was to create a device which can be used to more finely dose powdery and granulate substances in minute quantities within the gram, milligram or microgram range.
This task is solved according to the invention by means of the characteristic features detailed in patent claim 1.
The dosing device according to the invention essentially consists of a nipple (1) as is common on baby bottles. Nipple (1) can be made, of rubber, silicone or other material.
LISTING OF DRAWINGS
FIG. 1 Side view of the dosing nipple with inserted activator needle.
FIG. 2a Tip of the dosing nipple with closed material outlet as viewed from below.
FIG. 2b Tip of the dosing nipple with open material outlet as viewed from below.
FIG. 3a Side view of a dosing nipple mounted to a stock bottle with inserted activator needle.
FIG. 3b Exploded view of the dosing nipple with stock bottle, screw cap and activator needle.
FIG. 4 Cross section of a dosing nipple placed together with an activator needle in a stock bottle for storage purposes.
FIG. 5a Side view of a dosing nipple sealed shut with a plug.
FIG. 5b Cross section of a dosing nipple sealed off by a circular piece of glass.
For dosing the dosing nipple (1) can be hand-held or affixed to a dosing mount. The dosing mount can be in the form of a dosing gun. Dosing is done by shifting the dosing nipple (1) to a vertical position.
The dosing nipple (1) contains a reservoir (7) which is larger in diameter than the nipple and which features a somewhat coniform tip (5) which tapers down to the material outlet (2). The material outlet (2) features a slit-shaped opening located at the end of the tip (5) of the dosing nipple (1). If no lateral pressure is exerted to the tip (5), the material outlet (2) is closed. If lateral pressure is exerted to the tip (5) parallel to the longitudinal sides(3) of the material outlet (2), the tip (5) is squeezed together and, as a consequence, the longitudinal sides (3) of the material outlet (2) are pressed apart. The material outlet (2) opens. The more
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Bomberg Kenneth
Kashnikow Andres
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