JPH02500825A - Improved aerosol container closure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] background Aerosol dispensing containers contain fluid materials consisting of a variety of liquid and finely divided products. It has a wide range of uses. Such containers are provided with a valve-controlled release orifice, which by the action of a volatile propellant enclosed together with the product to be dispensed in a container of Operate. Since the propellant has a reasonable vapor pressure at room temperature, the product in a closed container is Maintained at a pressure greater than atmospheric pressure.

A conventional aerosol unit is tightly closed at one end and forms a hole at the opposite end. and a hollow cylindrical container adapted to receive a dispensing valve device. commonly installed The closure, called the cup, acts as a closure for the container and as a support for the valve device. do. For example, the mounting cup-shaped body has a pedestal part to which the valve unit is attached, and a pedestal part to which the valve unit is attached. The extending panel part, the hem part that hangs down from the periphery of this panel part, and this hem part. and an annular miso portion extending outward from the portion. Installation is done by tightly sealing the cup to the container. When in the closed position, a groove is located above the bead surrounding the container opening. child The lower portion of the skirt portion adjacent to the groove extends outwardly against the container wall adjacent to the bead. Expand or tighten. the cup to ensure a proper seal between the closure and the container. The gasket is provided within the groove of the cup-shaped body or primarily within this groove.

Conventionally, the cup-shaped sealing body is installed by placing a so-called "cut" gasket inside the cup. Especially when it is formed.

This type of gasket must be removed during propellant filling or other valve unit assembly operations. The attachment tends to have the disadvantage that it does not rest against the cup, and the attachment does not allow the cup and container to be sealed. When tightened as shown, the gasket is often bent and placed in a crooked position. This has the undesirable effect of making the seal less effective.

Other industrial methods of gasket installation, such as placing the gasket in a cup, are from a liquid gasket-forming composition consisting of a nidistomer dispersed or dissolved in A gasket, a so-called poured gasket, is formed in the field. A gasket like this When making a gasket, the liquid composition is passed through a gasketed metering nozzle through which the composition flows. is deposited in the desired shape within the groove of the cup while rotating under the cup. This deposit is The liquid carrier is then converted into a dry solid encapsulation by extrusion at elevated temperatures. .

Although this method of pouring gaskets is widely accepted in industry, has the disadvantage of requiring complicated drying operations. In this drying operation, the cup-shaped body is Care must be taken to avoid undue deformation from the horizontal plane. Press again Expensive recovery equipment must be provided for the drained liquid. In short, pouring Attaching the socket is an expensive step during the formation of the cup. “Pouring” For an example of a socket, see U.S. Pat. No. 3,342,381. stomach.

Another method of installing a gasket in a cup is described in U.S. Pat. No. 3,417,177. It is stated in the specification of the No. In this specification, the seal is made from heat-shrinkable material. Ru.

Attach a gasket to the hem of the cup with a diameter larger than the outside diameter of this hem. After applying the band of material, it will come into contact with the hem part with close friction. The cup is heated to a temperature and for a period of time sufficient to cause gradual contraction. Ru.

Other similar methods are described in US Pat. No. 3,443,006.

According to this specification, the band of the gasket material is swollen by the use of a suitable swelling agent. Increase the diameter of the seko band and attach it to the swivel at the hem of the cup. to this Next, the swelling agent is removed from the gasket material, and the pan P is tightly sealed with friction at the hem. Let it be in a state of collision.

Installation is done using the heat-shrink-swell method, which involves applying gasket material to the cup, which is expensive and slow. It has the disadvantage of being time consuming. U.S. Patent No. 3,417,177, column 4 According to lines 27 to 31, the positioned band can form an interference fit through friction. It should be heated to 240'F for about 2 to 5 minutes so that . According to U.S. Pat. No. 3,443,006, the band is Therefore, cotton must be placed in the swelling liquid for a period of 1% to 1% min and then dried. No. In addition, in the mass production method using the method described in the patent specification, an organic liquid recovery system must be used.

U.S. Pat. No. 4,5.46.525 and U.S. Pat. No. 4,547,948 include New gasketed installations, including new methods and devices, for cup system It is listed. In this system, the gasket material is attached to the cup in a suitable position. The arrangement and attachment are such that there is a seal between the cup and the bead of the container. moreover The disadvantages associated with the above-described method of applying gasket material to the cup can be avoided. . Also, the gasketed installation with excellent sealing properties allows the gasket to form a cup-shaped body. The aerosol mounting of the socket is an extremely quick and effective method and device for the cup-shaped body. position is obtained. Nos. 4,546,525 and 4,5, generally cited above. No. 47.948 discloses a method in which a tubular sleeve of gasket material is is passed through the compressible mandrel, and the installation first connects the hem of the cup and the adjacent end of the mandrel. Position and align so that the sleeve of gasket material is within the seven sections. and said attachment to said mandrel is resistant to movement toward and away from the cup. a relatively fixed portion and a movable portion, the movable portion of the gasket material support mandrel; When installing the section, press it toward the cup so that the gasket material enters the base of the cup. and retract the movable part of the mandrel to its initial position and install the sleeve. Cut the gasket material at a point between the cup and the mandrel to form a band of gasket material. When installing, move the gasket material forward to the location where it will be further biased to the base of the cup-shaped body. The attachment consists of ensuring that the band of material does not extend beyond the base of the cup. ing. This gasket is then installed and advanced to the final desired location on the cup. let

The type of installation described above uses a cup gasket system, i.e. a "cut" or "poured" ” and “sleeve” gaskets, modern industrial systems use plastic The laminated plastic sheet is laminated to a metal sheet, and then this laminated plastic sheet is installed in a cup shape. Form in the body. The thickness of this plastic laminate is typically Thin and substantially thinner than cut or poured gaskets. Chill to a degree of 0-0101n.

The fittings made by the valve equipment factory are attached to the bottom part of the cup and the fittings made by the container factory. - The annular bead of the resol container has nominal tolerances that are within quality control limits. Gasket thickness measurements between multiple types of gasket systems become even more complex. Due to changes in the finish, aerosol products with poor finish may not be detected until discovered by the end user. This often creates a seal of defects that remain unprotected.

The installation improves the seal between the peripheral rim of the cup and the annular bead of the aerosol container. Conventionally, various proposals have been made for mounting, but it is necessary to improve the shape or structure of the cup-shaped body. There has been little effort to do so. Attachment is to the bottom part of the cup-shaped body and the aerosol container. The seal between the annular bead of the be. The reason is that the installation requires that the seal between the cup and the aerosol container be maintained for several years. This is because it must be made airtight. The installation is cup-shaped body and aerosol Container sealing allows aerosol products to compete against non-aerosol products in the consumer market. We need to keep costs low.

The mountings that have been used in the aerosol industry for the past 25 years are cup shaped and International Application No. PCT/US8610 1068. This modification of the installation cup is sealed by the bead of the container. It forms the groove part.

This miso portion has an internal shape that differs substantially from the internal surface contour of the annular bead of the container. It has a partial area contour. Internal surface contour of the annular bead in the shape of the internal area contour of the groove part Due to the difference in shape, only a portion of the internal contour of the peripheral rim can be installed. The inner surface contour of the annular bead can be contacted when the shaped body is attached to the container. .

The shape of the inner area contour of the peripheral rim is such that the attachment is tightened to the annular bead of the cup-shaped container. Sometimes deformed. By this deformation of the internal area contour, the shape of the internal area contour is corrected. It is installed in a shape that is almost the same as the internal surface contour of the ring-shaped body and creates a tight seal between the cup-shaped body and the container. Make sure to seal it.

Summary of the invention Generally, the present invention provides a method for attaching a rigid, substantially undeformable annular structure to the outer wall of the cup groove. Gasketed fittings with protrusions or indentations are provided with cup-shaped bodies.

The annular depression should be offset from the midpoint (deepest point) of the groove. Matakubo It is best to install it in a groove that is closer to the hem of the cup.

The invention will now be described in more detail with reference to the accompanying drawings, in which: FIG.

Drawing description FIG. 1 is a cross-sectional view of a cup-shaped body having a laminated gasket on its surface.

FIG. 2 is an enlarged cross-sectional view of the portion of the cup-shaped body shown within the circular dashed line in FIG.

Fig. 3 shows an enlarged cross-section of the cup-shaped body, showing how the present invention is attached to a part of the bead of the container. It is a diagram.

Description of examples In FIG. 1, a cup-shaped body 10 receives and holds a valve unit (not shown). The base portion 12, the panel portion 14, the base portion 16, and the base portion 16 extend from the base portion 16. It has a miso portion 18. For installation, a gasket material 20 is laminated on the bottom surface of the cup-shaped body 10. It is. An annular depression 24 is arranged inside the midpoint 22 of the miso portion 18. . Recess 24 forms a corresponding protrusion 26 in gasket material 20 .

In Fig. 2, the mounting shown in partial cross section is indicated by the reference numerals in Fig. 1. Has a corresponding part number.

In FIG. 3, the cup-shaped body 10 is attached to the base portion 16 of the cup-shaped body 10 to the portion 30. The bead 28 of the container (not shown) can be removed by deforming it outward as shown. It is shown tightened to the side. This tightening process is well known to the aerosol industry. This is done using conventional methods and equipment.

The installation shown is for tightening the cup and bead of the container, in three areas or areas. is a normal seal and depression/protrusion shown as area A in Figure 3 immediately adjacent to the area. The compression and therefore sealing force of the gasket material in areas B and C shown on each side of will occur. Areas B and C shown as dashed line areas in Fig. 3 are areas where tightening occurs during work. Caused by movement of gasket material. The properties of this gasket material are This occurs prior to tightening by movement of the gasket into the space adjacent to the raised area. It has the property of retaining the volume occupied by the gasket.

International Application Number PCT/US8 (recorded at 5101068) Unlike the tapered surface of the mounting cup, the mounting with gasket of the present invention has a tapered surface. The indentations/protrusions on the body should be installed after tightening the cup and container bead. /Substantially retains the shape of the protrusion.

The mounting of the present invention may be made of aerosol metals which have been found suitable for use in forming the cup. current use in the metal industry, namely soot board and aluminum. In this case each Metal thicknesses of 0.010 in and 0.0161 nm are commonly used. suitable Gasket materials are available for cut, poured, sleep and laminated gasket systems. Mu K: Generally used in industry.

For this installation, the annular recess/protrusion of the cup-shaped body is formed using ordinary machining methods.

Installation follows the tightening of the cup and container bead to preserve the original condition of the recess. The dimensions of the cup-shaped annular recess required for installation are the depth and width of this recess.

0, OD 7 in ft to 0.010 in depth and radius of curvature 0.020 An annular recess with a width of 1.5 in. is installed using soot plate and aluminum as the metal of the cup-shaped body. 1001b for tin plate / 125 for in2 aluminum I found that I was satisfied when using the "suppressing" power of xb/in2.

In general, tightening the cup to the container bead requires the rigidity of the metal to maintain the inside and recess. The lower the height, the narrower the width of the recess. Furthermore, the depth of the depression is The thickness of the gasket material should not be exceeded, but it should be less than the thickness of the gasket material. Good.

Furthermore, for this installation, it is best to place the recess of the cup-shaped body inside the midpoint of the wall of the groove. Good too. Placing the recess at the midpoint of the groove allows the tightening head to contact the cup-shaped body. The indentation will now deform when it is raised.

The recess should be moved inward, i.e., the mounting should be placed closer to the base of the cup as shown. It is better to place the depressions outward. Inward from the midpoint of the wall that will become a depression. It has been found that a satisfactory sealing condition can be obtained by arranging the tube at a 45° angle.

The cross-sectional shape of the depression is preferably curved, but other shapes may be used.

Tighten the indentations at a point, and tighten the other indentations at a distance of 30' on the radius of curvature of the miso part. Multiple concentric annular recesses may be used when arranged in parallel.

Procedural amendment (flag) December 8, 1999

Claims (6)

[Claims] 1. It comprises a panel and a hem portion that is integral with the panel and hangs down from its periphery. The hem part forms an annular groove for receiving the container bead that partitions the container opening. In the mounting cup with the gasket flared outward as shown, the cup in the mounting annulus at least one annular depression formed on the outer surface of the groove; When the mounting cup body and container bead are tightened, the recess retains its original state. Mounting cup with gasket, characterized in that the dimensions are arranged in such a way that quality is maintained body. 2. A claim in which the annular depression on the outer surface of the groove is offset from the midpoint of the wall forming the groove. The mounting cup with gasket according to item 1. 3. A claim in which the depression on the outer surface of the groove is offset inward from the midpoint of the wall forming the groove. A mounting cup with a gasket according to item 2. 4. The recess was installed at a position approximately 30°C from the midpoint of the wall of the groove forming the cup-shaped body. A mounting cup-shaped body with a gasket according to claim 3. 5. The depression has a depth of 0.007 inches and a width with a radius of curvature of 0.020 inches. 5. The mounting cup according to claim 4, wherein the mounting cup has a shape of: 6. The mounting cup shape according to claim 1, wherein a plurality of concentric annular depressions are formed on the outer surface of the cup. body.