Dispensing – With recorder – register – indicator – signal or exhibitor – Position or extent of motion indicator
Patent
1998-02-02
1999-06-29
Huson, Gregory L.
Dispensing
With recorder, register, indicator, signal or exhibitor
Position or extent of motion indicator
2221465, 222386, B67D 522
Patent
active
059155930
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns the delivery of viscous or fluid material. It relates, first, to a device for delivery of such products, of the type comprising a removable tank used to feed, in a fluid-tight manner, a device intended for delivery of said fluid through a fluid line incorporating pressurization means.
This known type of device proves advantageous (see French Patent Application No. 93 13 970 in the Applicant's name), but exhibits one restriction: the device stops when the tank holding the product is empty.
To obviate this difficulty, conventional practice entails the provision of two tanks. However, such a configuration causes multiple problems: attachment of the tank to the fluid line, pressurization of the product emanating from the second tank, the space required by this second tank, and the difficulty involved in using rigid ducts.
SUMMARY OF THE INVENTION
The invention is intended to remedy these difficulties and to prevent the formation of dead zones in which product accumulates.
To this end, the device according to the invention comprises means for storing and delivering the product or material emanating from the tank, these means being positioned in the continuity of the line and below the pressurization means, in the direction of flow.
According to other features: the continuity of the line, and a chamber which empties into said duct, this chamber incorporating a plunger which, in the resting position, is flush with the duct and can move away from the duct in order to produce an accumulated volume of the product; controlled by a feeder which, upon actuation of a tank-level sensor, triggers the movement of the plunger up to a sensor of the lowered position of the plunger, which actuates data-emitting means designed to allow replacement of the tank; storage/delivery mechanism in the direction of flow, so as to avoid reverse flow of the viscous product or material when this mechanism is operating, thereby ensuring the safety of the device operator, who could be splattered with this product when the tank is changed; pressurized fluid-monostable feeder controlled manually or by a sensor which senses the lack of product in the tank, so as to adjust the pressure in the fluid line; the delivery device;
The invention also concerns the use of a device conforming to the device described above for the delivery of heat-fusible material.
BRIEF DESCRIPTION OF THE DRAWINGS
One device, given solely as a non-limiting example of the invention, will now be described with reference to the attached drawings, in which:
FIG. 1 illustrates diagrammatically a delivery device according to the invention.
FIG. 2 is a vertical cross-section of a storage/delivery mechanism according to the invention.
FIG. 3 is a vertical cross-section along line II--II in FIG. 2 of the storage/delivery mechanism.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The apparatus illustrated in FIG. 1 comprises a drum 1 forming a tank holding a thermoplastic viscous product 2, this drum being placed on an elevating platform 3.
The drum 1 is covered by a heating plate 4. The elevating platform 3 acts on the product 2 and the heating plate 4 by means of a hydraulic jack 5.
A double acting pump 6 controlled by a hydraulic jack 7 incorporating dual rods 8 is mounted on the plate 4.
The heating plate 4 is connected by means of a duct 9 to a mechanism 10 for the storage and delivery of the product 2. Level sensors 11, 13, 12 are placed in contact with the drum 1 in order to determine, respectively, whether it is full or empty and whether it must be replaced.
Product 2 is supplied by the drum 1 to the storage/delivery mechanism 10 by means of the rigid feed duct 9 equipped with a non-return valve 15.
The storage/delivery mechanism 10 is connected to a mixing device 16 located downstream in the direction of flow and comprising a fluid-tight container 17 fitted with a rigid duct 18 for feed of the viscous product 2, a nitrogen feed duct 20, and an outlet orifice 21. The container 17 incorporates an agitator
REFERENCES:
patent: 3815222 (1974-06-01), Davies et al.
patent: 5443796 (1995-08-01), Coeling et al.
Huson Gregory L.
SEVA
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