초록 ▼

The present invention relates to a device for discharge of liquid or substantially liquid products (2), preferably foodstuffs, e.g. mayonnaise, mustard, ketchup or dressing, from a compressible container (3) made of flexible material, preferably of plastic bag type. The container (3) is placed in an

The present invention relates to a device for discharge of liquid or substantially liquid products (2), preferably foodstuffs, e.g. mayonnaise, mustard, ketchup or dressing, from a compressible container (3) made of flexible material, preferably of plastic bag type. The container (3) is placed in an outer container (7) and is compressible by a compression device (4) in order to feed product (2) out therefrom through a nozzle (6). The invention is characterised in that a compression means (9) which forms part of the compression device (4) is disposed on a piston (17) adapted to being subjected to movements in a portioning direction (P3) so that the movable compression means (9) squeezes the container (3) in the outer container (7), and that the piston with its compression means (9) can perform a return movement in a return direction (P4) which is opposite to the portioning direction (P3).

대표청구항 ▼

1. A device for discharge of liquid or substantially liquid products from a compressible container made of flexible material which container is placeable in an outer container and is compressible therein by a compression device in order to feed product out therefrom through a nozzle, wherein a movab

1. A device for discharge of liquid or substantially liquid products from a compressible container made of flexible material which container is placeable in an outer container and is compressible therein by a compression device in order to feed product out therefrom through a nozzle, wherein a movable compression means which forms part of the compression device is disposed on a piston or equivalent adapted to being subjected to movements in a portioning direction (P3) so that the movable compression means squeezes the container in the outer container, and that the piston with its movable compression means can perform a return movement in a return direction (P4) which is opposite to the portioning direction (P3), characterised in that the piston is adapted to being subjected to movements in the return direction (P4) by the movable compression means being pressed down by the weight of the container and the product present therein. 2. A device according to claim 1, characterised in that the piston is adapted to allow such return movements (P4), whereby the container, after having been squeezed by the movable compression means in order to feed product out from it in the opposite portioning direction (P3), can expand to prevent or hinder elements of the product still in the nozzle from dripping out of the nozzle. 3. A device according to claim 1, characterised in that the piston is adapted to undergoing movements in the return direction (P4) by the movable compression means being subject to expansion forces which the container exerts when it endeavours to revert to an original shape after it has been squeezed by the movable compression means. 4. A device according to claim 1, characterised in that the piston has a ring or equivalent which accompanies the movements of the piston. 5. A device according to claim 4, characterised in that during movements of the piston the ring can move between two stop surfaces. 6. A device according to claim 1, characterised in that an operating device can be caused to perform movements in portioning directions (P1, P2), which movements are transmissible to the piston via a movement transmission means,in that the movement transmission means is so disposed that it can assume a releasing position (F) in which it releases the piston so that the latter can move in the return direction (P4) when the movement transmission means is not acted upon by movements of the operating device in the portioning directions (P1, P2),and in that the movement transmission means is also so disposed that it can be caused by the operating device to assume a locking position (L) in which it is locked to the piston by being firmly clamped to the latter so that it can transmit the operating movements (P1, P2) of the operating device to the piston. 7. A device according to claim 1, characterised in that the compression device has a compression means which is disposed at the top of the outer container above the movable compression means being movable upwards to squeeze a container situated between said compression means and the movable compression means, and that the device allowing the return movement allows the movable compression means to perform a downward movement in a return direction (P4). 8. A device according to claim 1, characterised in that the outer container has at the top a lateral aperture through which such a portion of the container, which comprises an inner connecting portion and, connected to it, a nozzle, can be taken out of the outer container, and that the outer container has a bracket by which said portion of the container with the inner connecting portion and the nozzle can be held firmly relative to the outer container. 9. A device according to claim 1, characterised in that the movable compression means has a collar directed towards the space in which the container can be placed, which collar abuts against the inside of the outer container. 10. A device according to claim 1, characterised in that the movable compression means is removably disposed in an outer container to allow it to be taken out of the outer container so that the container can be put into and taken out of it. 11. A device according to claim 1, characterised in that the compression device comprises two compression means, of which at least the movable compression means is disposed in the outer container which has two parallel sidewalls, and the piston is a rod disposed nearer to one wall of the outer container than the other wall. 12. A device according to claim 1, characterised in that the nozzle is intended for once-only use.