Dispensing – Movably mounted supply container
Patent
1992-03-03
1994-05-31
Kashnikow, Andres
Dispensing
Movably mounted supply container
222 64, 222181, 222399, B67D 564
Patent
active
053161963
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
There already exist various fluid dispensing devices designed to achieve operations such as gluing in series parts intended to be fixed permanently to each other. The Swiss patent CH-558 521, for example, describes an important element of a device of this type. Calibrated doses of fluid can thus be pumped into one or more nozzles or syringes via ducts emanating from a housing constituted by a reservoir, with no interposed gate or valve.
In a subsequent development of an apparatus of this type, a connection formed by a flexible tube was designed between the reservoir containing the fluid reserve and the applicator, thus facilitating manual operations.
SUMMARY OF THE INVENTION
The aim of this invention is to provide an improvement to fluid dispensers, in particular for gluing parts, comprising a glue reservoir, an applicator connected to the reservoir by a flexible tube and a pneumatic pulse generator for creating momentary excess pressure on the free level of fluid in the reservoir thus ejecting doses of fluid through the applicator.
In fact, it has been noted that in dispensers of this type, in order to ensure the permanent readiness of the applicator, it was necessary to place the latter during periods of rest in a position such that the tip of the downwardly pointing needle is slightly below the free level of the fluid in the reservoir. This arrangement avoids two phenomena which can occur during periods of rest if nothing is done to avoid them: droplets of liquid may fall from the tip of the needle, or the content of the tip of the needle may polymerize. However, the free level in the reservoir varies with the use of the dispenser as the reservoir empties.
With the aim of overcoming this fault, the dispenser of the invention is characterized in that the dispenser comprises, on a support, a receptacle for the applicator, means for holding the reservoir and a stabilizing arrangement, the latter ensuring that the free level remains at an approximately constant level with respect to the applicator placed in its receptacle during the functioning of the dispenser.
BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the subject of the invention will be described below, by way of example, with reference to the drawings, in which:
FIGS. 1a-1c are diagrammatic views showing the principle of this embodiment at different stages of dispensing,
FIG. 2 is an elevation of the embodiment described, and
FIG. 3 is a top plan view of the dispenser of FIG. 2.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 illustrates the principle of the device, i.e. a reservoir 1, of which the level of the contents may vary during the use of the device between three stages designated by A, B and C in FIG. 1. This reservoir is suspended by a spring, the characteristics of which it is not necessary to specify for the moment, and which is designated by 2, from a fixed support 3. A flexible tube 4 penetrates inside the reservoir 1, the lower end of the tube being located close to the bottom of the reservoir 1 and is therefore immersed in the liquid contained in this reservoir. This flexible tube 4 ends at an applicator 5 which is attached to a receptacle 6 integral with the support. The applicator comprises a vertically disposed needle 7, the tip of which is at a slightly lower level than the level 8 of the liquid in the reservoir 1. In FIGS. 1 and 2, the applicator is shown in the rest position. Periodically, an operator takes it to carry out a gluing operation and then replaces it in the position shown.
The letters A, B and C designate three different levels of the contents of reservoir 1. As the reservoir empties, its weight lessens, so that the spring 2 contracts. The displacement of the reservoir by the spring is regulated so that the level 8 of the liquid remains constantly at the same height. Thus, when the applicator is in its rest position, i.e. fixed to the element 6, the quantity of liquid it contains and which the tube 4 contains, is constantly the same, which ensures that the app
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Hormec Technic SA
Kashnikow Andres
Kaufman Joseph A.
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