DE3235172A1 - DISPENSER FOR PRESSURED GOODS - Google Patents

Description

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description

The invention relates to a free-standing dispenser for items under pressure, such as toothpaste, shaving cream, etc.

Free-standing dispensers for toothpastes and the like are known (DE-AS 1 210 149, DE-OS 2 611 644).

-10 Up to now, pressurized goods have usually been removed Aerosol containers, which contained a high pressure propellant, with the help of which the It was pushed out well (U.S. Patent 3,992,003). A known valve assembly for dispensers (U.S. Patent 3,097,766) is needed

- \ 5 a previously filled propellant.

There is also already a container with a toothed piston and a slide valve known (US-PS 2 356 874), in which, however, normally no overpressure is present, but its valve opens only after applying additional pressure.

Stand in another known dispenser (US Pat. No. 3,255,935) fingers provided on the piston in engagement with a vertical operating rod and with the inner wall of the Container to allow movement of the piston in only one direction in this way. It is also already a dispenser is known in which a piston is used to dispense the goods contained in the dispenser through a central tube

_{Press 3Ü} (US-PS 993 579, US-PS 2,732,101).

While none of the known dispensers contains an item that is under low pressure, the object of the invention is to To create a free-standing, pump-like dispenser into which a low-pressure item

is packaged and can be delivered from it.

A free-standing, pump-like dispenser for pasty goods, such as shaving cream, toothpaste ο, is used to solve this problem. Ä. The material that is under pressure in the dispenser is increased when the dispenser is used by additional pressure as a result of actuation of a piston rod that works together with a piston as a result of the volume reduction in the container. A forward in the tubular piston rod -] ο handenes valve opens as a result of this additional pressure, leaving the estate by the piston rod exit. The valve closes when the specified start or end point is reached. Packaging printing.

-] 5 The invention is explained in more detail below with reference to the figures explained.

Figure 1 shows a side view of a free-standing, pump type dispenser.

Figure 2 shows a section through the dispenser.

FIG. 3 shows a section through a modified form of the dispenser.

The dispenser 10 shown in the figures has a preferably cylindrical container 12 with a tapering one Area 14, which merges into a neck area 16, in which a piston rod 18 is slid in a tight fit bar is attached. The piston rod has an outlet opening 20 and is shaped at the top to form a finger grip area 22 for easy depressing. The container 12 has an enlarged base area 24, through which the stability is improved.

There is a collar on the piston rod inside the container 26 attached. A coil spring 28, which is under initial tension, is on collar 26 and on upper part of the tapered portion 14 attached at 30 to the piston rod after depressing continuously to press elastically into a raised position b, 2w. to pull. A stop pressed through the neck 16 32 serves to limit the upward movement of the piston rod, while the piston rod 18 is used to hold it has in a stable position and below the collar 26 ratchet-like teeth 34, the down and have outwardly directed side surfaces 38 and end in shoulders 36. The toothed area of the piston rod 18 surrounding a semi-flexible plate 40 is attached, the

"15 serves as a piston and is preferably made of a rubber-like one Material. It has a flexible upper lip 42 which engages the inner surface 44 of the Container 12 stands. The piston rod is hollow and has an inlet opening 46 at its lower end, which extends after pressing down the piston rod at a short distance from the bottom of the container. Within the hollow piston rod, a one-way valve 48 is provided, which opens only when the in the dispenser The pressure exerted when the product is located exceeds the pressure under which the product was originally packaged in the container 12.

When the piston rod 18 is depressed in use, a shoulder 36 comes into engagement with the plate 40 and presses this down to compress the product. The first downward movement of the piston rod leads of course to an engagement of the collar 26 with the plate 40, whereby this is pressed down so far until the following shoulders 36 can come into engagement with the plate 40. The lip 47 lies with tension

on the side wall 44 of the container 12 and allows the downward movement of the plate 40 and a seal against the passage of the product. In addition, it forms a great resistance to upward movement of the plate 40. The depression of the piston rod 18, which causes the downward movement of the plate 40, further compresses the product and forces it through the inlet port 46. The increased pressure opens the valve 48 so that the product can exit the dispensing opening 20 until the preset pressure of the valve is reached, which corresponds to the initial packaging pressure. The tension of the spring 28 then pulls the piston rod upwards until the movement is limited by the stop 28. Due to the action of the lip 42, however, the plate remains in its lowered position, and further movements of the shoulders 36 as a result of depression of the piston rod gradually lead to a downward movement of the plate until it the bottom 24 of the container has reached 12 and substantially all of the, in Has given up the goods that were present in the container.

In FIG. 3, a modified form of a dispenser is shown, which is essentially the same as the dispenser according to the figures 1 and 2 is constructed and works in the same way. In this embodiment, however, are the Serrations on the piston rod 18 corresponding serrations 60 is provided on the inner wall 44 of the container 12. These teeth run in the same direction as the teeth on the piston rod 18 and lead to increased stability of the plate 40, which ensures becomes that with the returning upward movement of the piston rod 18 through the plate 40 this remains in its newly reached lowered position.

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Claims (9)

Expectations Dispenser for goods under pressure, with a container for receiving the goods under a preset Pressure, characterized by a tubular piston rod extending into the container (12) (18) on which a piston (40) which can be moved downwards with the piston rod (18) is arranged, and by a valve (48) arranged inside the piston rod (18), which when the pressure increases in the container (12) lets the good escape and closes when the preset pressure is reached. 2. Dispenser according to claim 1, characterized in that the container (12) has a neck region at its upper end (16) through which the at its lower end an inlet opening (46) and at its The upper end of the piston rod (18) which has an outlet opening or nozzle (20) and which at its Outer surface has teeth (34) which are in driving engagement with the piston (40) during downward movement and slide through the piston (40) when the piston rod (18) moves upwards, and that on the outer circumference of the piston (40) engaging the container (12), an upward movement of the piston (40) preventing lip (42) is formed. 3. Dispenser according to claim 1 or 2, characterized by the piston rod (18) in its raised starting position pressing spring (28). 4. Dispenser according to one of claims 1 to 3, characterized by a stop (32) for limiting the upward movement the piston rod (18). 5. Dispenser according to one of claims 1 to 4, characterized in that the piston consists of a semi-flexible Plate (40) consists. 6. Dispenser according to claim 5, characterized in that the lip (42) provided on the piston is integral with the plate (40) is formed. 7. Dispenser according to one of claims 2 to 6, characterized in that the spring is a tension spring (28). 8. Dispenser according to one of claims 1 to 7, characterized characterized in that the upper end of the piston rod (18) is designed as a finger grip area (22) is. 9. Dispenser according to one of claims 1 to 8, characterized in that the inner wall of the container (12) is toothed.