EP0045339A1 - Variable ratio dispensing apparatus for two or more materials contained in cartridges - Google Patents

Abstract

1. Apparatus suited to dispense two or more materials contained in cartridges having movable end walls, particularly suited for viscous materials, including a casing (10) with housings (11) for said cartridges (B, b), means for pushing the movable ends of said cartridges, formed by two or more push rods (21, 25) provided on their head end with pushing disks (22, 26), means for transmitting the forward movement to said push rods, means for controlling said transmitting means and means to arrest the backward motion of said rods, characterized in that the means for transmission include at least one shaft (17) with two or more eccentrics (19, 23), each one of them being directly or indirectly linked to the shaft (17), one at least of the eccentrics (23) being so shaped that the position of the contact line between the eccentric (23) and a plate (24) is adjustable in order to allow adjustment of the forward movement of the corresponding push rod (25) in respect to the other one or to the other ones, and so to allow to change the ratio of the corresponding material in respect to the other material or the other materials ; that two or more plates (20, 24) which cooperate near one of their ends with said cams (19, 23) and are provided near the other end with a hole (20a, 24a) through which passes the corresponding push rod (21, 25), two or more springs pressing on one side on a member which is fastened to the casing (12, 16) and on the other side pressing on said plates (20, 24) in the direction opposite to the forward movement of the rods (21, 25), so as to maintain said plates constantly tilted and hence engaged on one side by the edge top of the hole (20a, 24a) with the rods (21, 25) and on the other side with the eccentrics (19, 25), so that at any slight movement of the driving shaft (17) and hence of pushing of the plates (20, 24) imparted by the eccentrics (19, 23) in the direction of the forward movement of the push rods (21, 25), the latter advance immediately, said plates so engaged and achieving the transmission of the forward movement of the rods with continuous action ; that the control means consist of a lever (18), which is integrally linked at one of its ends with said driving shaft (17) so as to exert a continuous action on said shaft (17), and which can be long at will and so that the rotation effort exerted by the lever (18) on the shaft (17) can be great at will.

Description

The present invention refers to a device Aote Sawing simultaneously two or more products ^w or- adjustable percentages.

Hitherto there has been produced on the market a machine for cutting two products which is composed by a advancement system which comprises a rack and a pawl which are actuated by a lever whose movement device is held in the hand. A 'U' curve allows the two products to exit simultaneously, the two legs of the 'U' activating the moving bottom of the two containers.

• 1- Le système étant actionné par un levier dont le mouvement est contenu dans une main et qui est donc trop court, et n'ayant pas la possibilité d'allonger le levier étant donné la structure même de la machine, il résulte impossible de pouvoir utiliser des récipients ayant une contenance supérieure à 1 Kg. et demi.
• 2- Le dosage est lié au déplacement d'au moins une dent de la crémaillère.
• 3- Au début d'un dosage il arrive souvent que l'un des deux produits ne déflue pas simultanément à l'autre, nécessitant ainsi de jeter tout le produit déflué en premier jusqJà ce que le déflux des deux produits advienne simultanément pour toute la longueur de la course d'une dent de la crémaillère.
• 4- Le pourcentage des deux ou plusieurs produits est fixe pour une machine déterminée et ne peut être réglé. Ceci par contre est nécessaire parce que souvent le pourcentage d'un produit doit être varié en fonction des conditions de la température ambiante, ou encore du type de travail que l'on desire exécuter.

These machines have the following drawbacks:

• 1- The system being actuated by a lever whose movement is contained in one hand and which is therefore too short, and not having the possibility of lengthening the lever given the very structure of the machine, it is impossible to be able to use containers with a capacity greater than 1 Kg. and a half.
• 2- The dosage is linked to the displacement of at least one tooth of the rack.
• 3- At the start of a dosage it often happens that one of the two products does not deflate simultaneously with the other, requiring thus to throw all the deflected product first until the deflux of the two products occurs simultaneously for the entire length of the stroke of a tooth of the rack.
• 4- The percentage of the two or more products is fixed for a given machine and cannot be adjusted. This, on the other hand, is necessary because often the percentage of a product must be varied according to the conditions of the ambient temperature, or even the type of work that one wishes to perform.

The object of the present invention is therefore to realize the possibility of adjusting the percentage of a product with respect to the other or to the others.

Another object of the present invention is that of being able to regulate the effective start of any start of flow thus achieving at any time the simultaneous exit of the two or more products.

Another object of the present invention is that of being able to take any desired quantity of product, without being linked to the teeth of the ceramillator, that is to say without having to carry out variations of a minimal preset entity.

Finally, a further aim of the present invention consists in allowing the use of larger containers, the lever arm being able to exert a much greater force on the push rod of the movable bottom of the container.

The aforementioned main purpose has been obtained by providing that the advancement of at least one product is effected by means of an eccentric the position of which is made adjustable, so that the percentage of this product debited can be varied d 'a simple way.

An improvement of the present invention is obtained by providing for the advancement of the bottom of at least one container by means of an eccentric which pushes the end of a plate provided with a hole and subjected to the action of a spring inserted in the push rod which is thus introduced into the aforementioned hole.

A further development of the invention provides for the creation of an adjustable junction between the push rods of the two or more products with the eccentrics, so that the start of the dosing of each product can be adjusted for each container. In the latter case, it is also preferable to provide a lever for unlocking the action rod, which allows the rods to be removed and the latter to be moved whenever it becomes necessary.

Another solution preferred by the invention provides that the actuating lever which acts on the eccentric is long arm, so as to allow to exert a considerable force on the bottom of the containers.

A further embodiment of the invention provides that the containers, especially the larger ones, are held in place by a disc placed on the side of the flow which disc prevents the front bottom of the container from becoming bulged, so that the flow of the contents is complete, no deformation of the aforementioned background can thus occur.

Finally, another preferred solution of this invention provides that on the push rods there is mounted a rod stop device, which prevents movement of the rod when the lever completes its empty return stroke, it can be especially for example riding a 'Seeeger'.

Finally, a preferred embodiment of the invention provides that the device is also provided with a gnea serving either to lock the container in its place, i.e. for transporting the whole machine.

The last preferred embodiment of the invention provides, finally, that the axes of the rod holder supports are arranged perpendicular to the axis of the support which contains the actuating lever.

• Fig.1- est une vue latérale du dispositif concernant la présente invention dans laquelle est visible pour une meilleure clarté du dessin, un seul des moyens d'actionnement des fonds des récipients.
• Fig.2- représente une vue partielle du côté postérieur de la machine.
• Fig.3- représente une vue antérieure de la machine même dont certaines parties de celle-ci ont été détachées.
• Fig.4- c'est la vue d'un détail de la Fig.1

The present invention will now be better illustrated by means of an exemplary embodiment which has been shown in the appended figures, in which:

• Fig.1- is a side view of the device relating to the present invention in which is visible for better clarity of the drawing, only one of the means for actuating the bottoms of the containers.
• Fig.2- shows a partial view of the rear side of the machine.
• Fig.3- shows an anterior view of the machine itself, parts of which have been detached.
• Fig.4- it is the view of a detail of Fig.1

Referring to the figures, it will be noted that, in general, the base 10 has indicated a base carrying various cradles 11 capable of supporting the smaller container “b”, while the larger one “B” is simply retained between the support 12 and the front disc 13 and which has a hole 14 through which the flow can take place. Other possible stops can also be planned, if necessary. On the base 10 are mounted three supports: the 12 having a hole arranged longitudinally; a support 15 having a hole into which the operating shaft 17 of the lever 18 penetrates; this shaft is arranged perpendicular to the hole passing through the support 12; and a subsequent support 16 able to support the push rod from the bottom of the smaller container since the axis of the hole in this support is arranged parallel to the axis which passes through the support 12.

The shaft which is rotated by the lever 18 is provided with an eccentric 19 which collaborates with a plate 20 provided with a hole 20a, which is preferably profiled in the form of 'L', in order to be able to operate at using its upper part as an unlocking lever. This plate 20 is pushed by a spring 29 which contrasts the advancement of the plate 20 by blocking in this way the rod 21 each time the latter releases the plate 20.

In fig.2 is visible the plate 20 which has a hole 20a through which can pass the control rod 21 for the flow of the first product, this rod being connected with a disc 22 which-enters the container 'B'.

To the eccentric 19 is connected an adjustable eccentric 23 which actuates, in a similar manner to the eccentric 19, the second product, the eccentric 23 collaborating with a plate 24, pierced at 24a, so as to allow the control rod to pass 25 of the second product which pushes the bottom of the container 'b' with its plate 26. The plate 24 is pushed by a spring 28 and is preferably provided with a lever portion 24b. The control of the product contained in the container 'b' is visible in Fig.2 and 4, since in Fig.1 for clarity, this actuation has not been indicated. By moving the position of the eccentric 23 by means of the screw 27, the position of the contact line between the eccentric will be varied. 23 and the plate 24, so as to vary the advancement of the rod and of the plate 24, which will vary the advancement of the rod 25 for each movement of the lever 18.

There is also provided a handle 30 which fixes the larger container 'B' and which is mounted between the disc 13 and the support 12 preferably, in an adjustable manner by means of a thread and a nut. .

The operation is carried out as follows: by pressing on the portions 20b and 24b which act as levers, the embedding created by the plates 20 and 24 is released, so that it can thus be pushed by hand backwards the two rods 21 and 25 so that the containers 'B' and 'b' can be put in place. After that we will adhere the rods with their disks 22 and 26 to the bottom of the containers 'B' and 'b' and we will start to operate the lever 18. The rods 21 and 25 will start to move but the products contained in the pots 'B' and 'b' will not come out simultaneously, so that as soon as one of the two products is noted, the advancement of the products will be stopped by actuating the lever 24b, the we will obtain by hand the advancement or stopping of the product contained in the smallest container.

Eventually we will make the product advance which is again contained in the larger container. From the moment when the start of the flow is noted from the two containers, the two rods 21 and 25 are actuated simultaneously by releasing the support on the lever 24b, the two products will then leave in the desired percentages. In case it is necessary to vary the percentage of the two products it will suffice to vary the position of the eccentric 23 by rolling it on the shaft 19: this will produce a smaller or greater advancement of the rod 25 relative to the rod 21. When the flow rate is almost complete , the disc 22 will come into contact practically with the disc 13, through the bottom of the container 'B', and no deformation of this bottom will be possible, and therefore no waste of the product contained in the container 'B'.

The invention includes all the variants of detail which could be quite natural to a technician in the sector.

Claims (9)

1- Device capable of producing the flow rate of two or more products in various percentages, characterized in that the pushing action on at least one of the products is carried out with an eccentric means 23 adjustable, so that one can adjust the percentages of this product compared to others. 2- Device according to claim 'l', characterized in that the actuation of the push rods (21, 25) of the bottoms of the pots is obtained by means of a plate (20,24) provided with a hole (20α; 24a) and pushed by a spring (29,28) which acts at an angle on said rods. 3- Device according to any one of the preceding claims, characterized in that the actuating lever (18) is with long arm. 4- Device according to any one of the preceding claims, characterized in that there is at least one disc (13) which adheres to the front part of the container over the entire surface of its bottom, so as not to allow it to bulge. 5- Device according to any one of the preceding claims, characterized in that at least one plate (20 and 24) is provided with a portion (20b, 24b) folded in 'L' which functions as a release lever for the rods actuation. 6- Device according to any one of the preceding claims, characterized in that there is a device against the return of the rods which is produced, for example, by means of a "Seeger". 7- Device according to any one of claims above, characterized in that a handle (30) is provided, which is used both for transporting the mounted group and for fixing the larger container, which handle is mounted between the front disc (13) which holds the container ' B 'and an extension of the support (12) which contains the push rod of the main container. 8- Device according to claim 7, characterized in that the handle (30) is mounted in an adjustable manner. 9- Device according to any one of the preceding claims, characterized in that the axes of the supports (12, 16) through which the rods (21,25) pass are perpendicular to the axis of the support (12) capable of receiving l 'shaft (17) of the actuating lever (18).

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