FR2517221A1 - Pressure-distributed fluid preservation system - has pump generating increasing vacuum in vessel and preventing air inflow - Google Patents

Abstract

The preservation system is for fluids to be distributed under pressure, particularly perfume. The fluid is enclosed in a vessel under a pressure at the most equal to atmospheric, the vessel being sealed by means of a suction and pressure pump acting in one direction and allowing no air flow in the reverse direction into it. As the pump distributes the fluid, an increasing vacuum is generated inside the vesel. The pump (3) can have an immersion feed pipe (10) with its mouth at the bottom of the vessel (4). The internal volume of the pipe is at the most equal to half the working volume of the pump.

Description

251722 1

  1. Method for conditioning liquid to be dispensed under pressure and packaging using such a method & The present invention relates to the packaging of liquids sheltered from atmospheric contamination and their distribution under pressure with an incorporated manual pump. It relates more particularly to a packaging process as well as a packaging using

this process.

  The packaging of liquids and more particularly

  rement of liquids alterable to air, notably par =

  If I smoke, presents some difficulties.

  Such products are still sometimes distributed using sprayers operating under the action of an air jet, for example from a pear. In this case,

air pollution is maximum.

  Vacuum pumps were also used and

  crowding which ensures the liquid is sprayed by a swirling mechanical effect Pollution is a bit

  smaller than sprayers, but all the con-

  additions of this type hitherto used provided for the

  replacement of the sprayed liquid with fresh intro air

  duit in the bottle This did not prevent the oxidation of the perfume or other product enclosed in the bottle

  oven to overcome this drawback, we proposed hell-

  sea the liquid in the bottle under an inert gas pressure E

  usually nitrogen and distribute it through a pump.

  The liquid is thus kept sheltered from air until the bottle is completely emptied, but the pressure of the gas injected into the container causes, at least at the start of use of the filled container, efforts to actuate the pump. that some customers may consider comrae

  unacceptable In addition, this mode of packaging is rela-

  tively expensive because it involves an injection operation of the gas under pressure inside the container, in addition

filling with liquid.

2.

  The object of the present invention is to overcome the

  suitable for the aforementioned packaging.

  The subject of the invention is a method for conditioning

  ment of liquids to be dispensed under pressure, characterized in that the liquid is enclosed in a rigid container,

  in that the container is sealed with a suction pump-

  unidirectional delivery without air return to the interior

  laughter of the bottle, and in that the liquid is distributed by the pump creating a growing depression inside

of the container.

  The subject of the invention is also a condition-

  ment according to such a method characterized in that it comprises a rigid container, equipped with a suction-ref-boiling pump

  unidirectional, sealed without access to the atmosphere, and rem-

  at least partially folded liquid under pressure

  more equal to atmospheric pressure.

  It is generally advantageous if the piston

  pump flow has a diameter between, approximately,

3 and 10 mm.

  The return spring of the vacuum pump piston

  ration can have a force between, approximately, 0.45 and 5 da N. The packaging according to the invention allows

  filling rate of the container before dispensing the

  guide greater than about 70%, and up to

minus 90%.

  In a particularly advantageous embodiment

  tageux for the packaging of perfumes or other pro-

  oxidation-sensitive products, the empty-residual space of the container can be filled with an inert gas, of density at least equal to that of air, from the group comprising in particular carbon dioxide, nitrogen, chlorofluorinated hydrocarbons ,

  nitrous oxide, butane, propane.

  The invention will be better understood on reading the

  detailed description which follows and upon examination of the drawing

  annexed which represents, for information only, an embodiment

tion of the invention.

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3.

  The packaging shown essentially includes-

  a rigid container 4 consisting of a metal can

  of the type commonly used for air conditioning

  floor, in particular a container in painted Ole t, as shown, or in aluminum or glass Opening this container

  pient is sealed by a crimped metal cup 8, per-

  created by a central opening 13 traversed by the control rod 1, integral with the delivery piston 2 of a pump

  conventional 3, the pump body 5 of which has at its

  lower part a housing 6 in the form of a thimble returns, maintaining a dip tube 10 for supplying the liquid 11 to be dispensed The pump body 5 ends at its part

  upper by a flange 7 set in the cup 8.

  An elastic seal 9 compressed by an annular flange 12 of the pump body 5 seals and insulates the interior

of reducer 4 from the atmosphere.

  A push button 15, inserted on the end of the pump rod 1 allows the pump to be actuated against a return spring 14 which ensures the suction stroke of the piston 2 via a small auxiliary piston 17 whose end 18 constitutes a needle closing the internal evacuation channel 19 of the rod 1, in the direction

  a spray nozzle 16, carried by the push button

evening 15.

  This pump is of conventional construction and for-

  should be replaced by any other pump, including

  ment of the type comprising a non-return ball valve

cited by a spring.

  A particularly practical and adaptable packaging process on conventional packaging assembly lines consists in purging the air in the container 4 by injecting an inert gas with a density at least equal to that of the air, then introducing into the container the

  desired dose of liquid 11, to be placed on the coi-

  of the container, the pump holder cup 8, fully equipped with the and pump 3 and of the diffuser 15 / to crimp the cup on the container. 4. Thus, the liquid ll is enclosed inside the

  container 4 in contact with the inert gas filling the es

  residual empty space 20 under a pressure close to the

atmospheric sion.

  As the liquid is sprayed by actuating the pump, the pressure drops in space, without this interfering with the functioning of the pump, which is a priori surprising, because contrary to all prejudices. The effort required to operate the pump

  decreases as the bottle is emptied.

  It can be seen that the forces due to friction (f) are linked to atmospheric pressure (Pa), to the cross section of the delivery piston (S), to the force (R) of the return spring of this piston, by the relation f <R Pa S

  Experience shows that these results are obtained

  bare in good conditions with pistons of diameter between 3 and 10 mm, biased by return springs with a force between about 0.45 and 5 da N, and that it is possible to use practically all

of the container capacity.

  As a depression is created inside the container, as a result of the distribution of the

  liquid, partial pressure compensation occurs-

  lying in the free space above the liquid, due to

  the vapor pressure of the conditioned liquid.

  -Of course, the invention is not at all -limited to the embodiment described and shown, it is likely to have many variants accessible to humans.

  of art, depending on the applications envisaged and without

  however, within the scope of the invention.

25 12517221

Claims (2)

  1 Process for packaging liquids in distri-   drink under pressure, characterized in that the liquid is enclosed in a rigid container, in that the   container with one-way suction-pressure pump   nelle / without return air to the inside of the bottle, and in that the liquid is distributed by the pump by creating a   increasing depression inside the container.   2 Packaging according to the resale process   dicatior 1 # characterized in that it comprises a rigid container (4) equipped with a unidirectional suction-discharge pump (3), sealed without access to the atmosphere, and at least partially filled with liquid (11) under pressure at most equal to atmospheric pressure, 3 Packaging according to claim 2,   characterized in that the pump delivery piston   pe has a diameter between, approximately, 3 and 10 millimeters 4 Packaging according to claim 2 or claim 3, characterized in that the return spring of the piston of the suction pump has a force between approximately, 0.450 and 5 da N.   -Conditioning according to one of the claims   2 to 4, characterized in that the filling rate of the container before dispensing the liquid is greater than % about.   6 Packaging according to one of claims   2 to 5, characterized in that the residual empty space (20) of the container is filled with an inert gas, of density at   less equal to that of air, of the group including in particular-   carbon dioxide, nitrogen, chlorinated hydrocarbons   fluorinated, nitrous oxide, butane, propane.