MXPA98000676A - Wall cover thick for aerosol container and method for factory - Google Patents

Abstract

The present invention relates to an aerosol container of the type accommodating a top-engagable cover having a curled outer periphery for crimping the connection to a container body, a depression radially inwardly of and in the vicinity of the outer periphery corrugated to accommodate a nailing plate, and an inner periphery surrounding central opening for connection to an aerosol dispensing device, wherein the improvement comprises: a top engagable top free of said flared depression in the vicinity of the outer periphery, and which has a generally convex demo shape as it extends from the periphery to the inner periphery, thereof to eliminate the weakness in the cover due to the flared depression

Description

THIN WALL COVER FOR AEROSOL CONTAINER AND METHOD TO MANUFACTURE BACKGROUND OF THE INVENTION The present invention relates to the cover of an aerosol spray container, whether of the barrier or non-barrier type, and is particularly related to the cover of an aerosol container that is wall-mounted. thin. Spray spray containers have been used worldwide for decades. Normally, these containers are made of metal, such as for example steel or aluminum and, they dispatch either fluid or viscous materials and are of the barrier type or of the non-barrier type. Many fluid materials, and particularly those of lower viscosities, are dispensed from pressurized aerosol containers of the non-barrier type, where there is no separation between the fluid material to be dispensed and the pressurization propellant within the container. In contrast, a barrier-type dispensing container has a movable barrier within the container, such as for example a flexible diaphragm or a piston, where the material to be dispensed is on the side of the barrier towards the outlet and the propellant is find on the other side of the barrier and push against the P1037 / 98 MX barrier thus expelling the fluid materials of higher viscosities through the dispensing valve of the container. The aerosol container comprises a generally cylindrical container body having an open end and a cover attd to the open end normally by crimping or bending, although sometimes welding or gluing is used. A nozzle for spray, foam or jet, is supported on the cover and communicates with the content in the container body to deliver the contents through the nozzle when the nozzle is activated. A flared depression projecting within the body of the container and extending circumferentially in the radial vicinity where the cover meets the container body is characteristic of the covers of most aerosol containers. Radially inward from the depression, the roof has a rounded dome, generally convex. The flared depression is to receive a plate of engargolado used in the process of joining the cover with the body of the container. However, the depression is the weakest and therefore most easily deformable part of the cover when pressurized to the aerosol container. Therefore, aerosol container covers have to be of P1037 / 98 MX relatively thick wall to protect against the cover being deformed under pressure. The weakness in the cover depression is particularly critical when the pressure in the aerosol container increases due to increases from the ambient temperature during storage, transportation or manufacturing. The covers may also have a small flange inward from the depression for the purpose of holding the cover lid. The normal procedure for attng the cover to the container body includes a double-binding process. The body of the container is formed with a flange along the outer edge of the open end and the cover is formed with a ripple along its outer edge and with a depression in the vicinity of the corrugated edge. During the first engargolado operation, the ripple of the cover is entangled with the flange on the upper part of the container body. The body of the container is placed on a base plate, which can be rotatable, and the nipple plate is placed within the countersunk recess of the cover. The cover and the body of the container are intertwined by means of a nibbling roller having a specially contoured groove. The crimping roller couples the ripple of the cover P1037 / 98 MX and the flange of the body of the container and the interlacing compressing them against the resistance that opposes the engargolado plate. During this first operation of engargolado, the cover and the body of the container are rotated past the nip roll by turning or rotating either the base plate or the plate or both. A good quality engargolado during the first operation is neither too loose nor too tight and, the flange of the body of the container is well rolled up in the radius of the ripple of the cover. After the first stitching operation, it is retracted to the first stitching roller and no longer makes contact with the cover or with the body of the pack. During the second engagement operation, a second nibbling roller having a second groove profile different from the first nip roll is used. The second groove profile is flatter than the profile of the first engaging roller and, the profile of the groove is designed to press the ripple of the cover and the flange of the body of the container in a hermetic manner to develop the tightness of the double engargolado . Also during this step, the sealing or sealing compound, if previously applied to the cover or used in some other way, is evenly distributed around the engargolado or P1037 / 9 «MX seam. After the double engargolado operation is completed, the depression remains as part of the cover profile and does not change shape even after the aerosol can is filled and pressurized with a fluid material. The internal pressure of the container to which the cover will be subjected and, especially, in its weakest region of the flared depression, has required that the wall of the cover be relatively thick, so that it does not become permanently distorted, does not turn towards out or reverse or break due to the high pressure encountered during filling, storage, transportation, use and testing. It is not uncommon that during storage and transport, the aerosol container is exposed to high ambient temperatures that raise the internal pressure of the container and, this additionally puts strain on the depression of the cover. Due to the potential risks of rupture or distortion of an aerosol container, several governmental entities have required that certain types of aerosol containers have particular mechanical resistances or distortion and bursting. For example, a regulation of the Department of Transportation of the United States of America requires that an aerosol container that has less than 27.7 ounces P1037 / 98 MX fluid or 819.2 ml capacity can withstand and not permanently distort an internal pressure equal to the equilibrium pressure of its intended content, including the fluid material and the propellant at 130 ° F or 54.4 ° C (122 ° F). 50 ° C is also a standard that will be adopted) and, that the pressure in the container should not exceed 140 psig or 965 kPa or 9.65 bar at 130 ° F or 54.4 ° C. If the internal pressure in the aerosol container exceeds 140 psig or 965 kPa or 9.65 bar, special specifications are required for the can. In addition, the US Department of Transportation. it also requires that there be no permanent distortion of the aerosol container at 130 ° F or 54.4 ° C and that the container does not explode at a pressure that is one and a half times as much. large as the pressure at 130 ° F or 54.4 ° C. Thus, for example, if the equilibrium pressure of the aerosol container at 130 ° F or 54.4 ° C is 140 psig or 965 kPa or 9.65 bar, then the package should not explode at 210 psig or 1448 kPa or 14.48. Pub. In order to comply with the ordered governmental regulations and to withstand the high internal pressure expected, the cover of a conventional aerosol container made of steel has a wall thickness in the range of 0.012 to 0.013 inches or 0.305 to 0.330 mm, in so much so that the thickness of the wall of a cover made of aluminum, depending on the alloy, is in the P1037 / 98 MX range 0.012 to 0.018 inches or 0.305 to 0.457 mm. These requirements in the thickness of the roof wall produce a roof that weighs 16 to 20 grams if it is made of steel and has a diameter of approximately 2.47 inches or, a weight of 14.7 grams if it is made of an aluminum alloy and It has a diameter of 2.47 inches and a wall thickness of approximately 0.016 inches or 0.406 mm. If it were not for the inherent weakness of the depression region of the plate in the cover of the aerosol container, the covers could be fabricated from a thinner wall metal producing substantial economic as well as environmental advantages. However, the conventional wisdom is not to make the covers of a thinner wall metal, but rather, to use thicker wall metal. The economic and environmental drawbacks of relatively thick wall aerosol container covers are large considering that approximately 10 billion aerosol containers are used annually worldwide. From an economic point of view, it is easily understandable that a reduction in the thickness of the cover of the aerosol container can have a significant impact in reducing the need for ores and minerals used in the production of these covers, particularly since these ores and P1037 / 98 MX These minerals are declining supplies. And with the current steel cost at approximately $ 600 to $ 700 per ton, an aerosol container cover that has half the conventional wall thickness results in savings of approximately half the steel required, or savings of more than $ 18 million. of dollars per year for all consumers in the US Comparable or even greater savings are also obtained by using aluminum covers. The average weight of a conventional thick-walled cover having a diameter of approximately 2-1 / 2 inches or, approximately 1 centimeter, is approximately 0.7 ounces (20 grams). If this wall thickness of the roof were reduced by half, savings of 10 grams per roof or 30 billion tonnes (30 thousand tons) of steel would be achieved only in the United States of America, saving approximately 100,000 tons of steel would be obtained globally. Comparable savings could result for aluminum covers. In addition, more energy is consumed when obtaining the metal ore to produce the metal and, in the manufacture of the aerosol container covers having relatively thick walls. The cost of transporting the metal for these covers at each stage from the initial production of the ore, from the transportation of the metal to manufacture P1037 / 98 MX covers, when transporting full cans should also be considered. If the covers were of a thinner wall metal and were therefore lightweight, substantial savings in transportation costs would result. At approximately 30 tons per truck load, this translates into one thousand tractors per year for each stage of the shipment. With three or four stages of boarding, this produces a very big saving in the cost of the shipments by truck. It goes without saying that each of the above economic factors also have an environmental impact. Adverse effects could be significantly reduced if the aerosol container cover could be reduced in wall thickness and still meet the stringent safety requirements mandated by various governments. In addition, the relatively thick wall cover of conventional aerosol containers are rigid and, thus, not easily deformed or crushed to allow their disposal or recycling. Since the flared depression in the container covers are traps for dust and dirt, an additional advantage will be obtained by eliminating these depressions by providing a more hygienic container or one with easier access to the exposed surfaces of the cover for P1037 / 98 MX its cleaning. In addition, one method by which the industry combats the problem of antihigiene is to use a large bump cap to prevent dust and dirt from accumulating within the flared depression. However, these caps add an unnecessary cost to the aerosol container and have additional environmental contamination problems. In this way, if the source of the problem, the depression, is eliminated, the caps with large projections are not necessary.

SUMMARY OF THE INVENTION A main object of the present invention is to provide a cover for an aerosol container that does not have a flared depression and, thereby eliminating the inherent weakness attributable to this depression when pressurizing the package. A further object of the invention is to provide an aerosol container cover having a thinner wall, 10% to 70% thinner than what is found in conventional container covers. Another object of the invention is to provide a cover for an aerosol container having a thin wall, which will not deform or break under the pressure encountered during the manufacture, transportation, storage, use and testing of the aerosol container. P1037 / 98 MX Another additional object is to provide A cover for aerosol containers that has a thin wall but can withstand internal pressures equal to or beyond those required by government safety regulations. A further object is to provide a thinner wall spray aerosol can cover that satisfies the various environmental issues particularly by reducing the amount of metal needed to produce the cover by 10% to 70% compared to conventional covers. The present invention has to do with reducing the wall thickness of the container cover for aerosol and, therefore it is contrary to the conventional wisdom of those who work in the design and manufacture of aerosol containers. A relevant factor for the cover of the present invention which is of a thin-walled material and still comply with the regulations ordered by the government is, the elimination on the cover of the flared depression, conventionally necessary in the process of engargolado to admit a engargolado plate. The aerosol container cover of the present invention is, in cross section, of a generally continuous convex dome configuration as it extends from an outer periphery to an outer periphery.

P1037 / 98 MX inner periphery, although it can be relatively flat just above the double engargolado. In general, the cover of the present invention is hemispherical, parabolic or elliptical in shape. Due to the physical nature of its configuration, which takes into account the elimination of the flared depression, the cover of the aerosol container of the present invention is capable of withstanding an important pressure without deforming or breaking. The cover of the aerosol container of the present invention is of a thin wall thickness such that the distortion or inversion of the cover would be expected at a pressure substantially lower than the minimum distortion and / or investment pressures dictated by the government. . For example, in accordance with regulations issued by the government of the United States of America, an aerosol container cover must be of sufficient strength to withstand distortion at a pressure of at least 140 psig, while the European Union requires that aerosol container covers should not be turned outward or inverted at pressures above 176 psig. However, the aerosol container cover of the present invention is of a thin wall thickness that would be distorted or inverted at, for example, 110 psig below a minimum level dictated by the government for distortion or inversion. Of this P1037 / 98 MX mode, the aerosol container cover of the present invention is contrary to conventional wisdom due to its thin wall construction. However, the cover of the present invention was already turned outward or invested during its manufacture and before its installation in a container. In this way it acquired a geometric configuration that makes it resistant to any additional distortion, inversion or rupture even at pressures substantially higher than the minimum distortion and / or investment pressures dictated by the government. Further, since the finished aerosol container cover of the present invention is free or, substantially free of any flared pressure in the vicinity of its outer periphery, it lacks the narrow width depressions which may be problematic in other covers in where they may have a hygienic or sanitary problem because these depressions are points for the collection of dust, dirt and similar residues that are not easily expelled or cleaned. There are several methods by which the cover of the present invention can be manufactured and the method by which it is manufactured determines the method by which the cover is attached to the body of the aerosol container. In a first method, the cover of the aerosol container is formed P1037 / 98 MX and formed by a normal punching process and, initially includes a flared depression to admit the engargolado plate but, it has a thinner wall thickness than the conventional aerosol container cover. A thin wall cover with this configuration is totally contrary to the general design of the spray covers, because the depression in the cover is especially vulnerable to deformation. By normal processing, this thin-walled cover is attached to a container body, such as, for example, by the double-binding process. After which, a seal is placed either inside or around the central opening of the cover with a tube extending through the seal. Under a controlled environment, a pressurized gas is delivered to the aerosol container through the tube and, the pressure rises internally in the package to cause the flared depression to deform outward, i.e., to turn outward or reverse , until it is substantially or completely removed from the container cover. The cover of the invention develops a generally convex dome configuration that is capable of withstanding substantial internal pressures to which the aerosol container can be attached, even when the cover has a thin thickness of P1037 / 98 MX wall. Instead of using gas pressure, hydraulic pressure can be used or a mechanical system can be used to flip out or invert the cover. Only after the cover has been initially formed, has it been installed in the container and has it been reversed that the container with the cover is ready for filling. In an alternative method, the container cover of the present invention is formed in a conventional punching machine up to its generally convex dome configuration, so that it lacks a flared depression. Again, the cover flips out or reverses before the container is filled and, here, even before the cover is placed on the container. Because there is no flared depression in the cover of the present invention, a unique apparatus and processing steps are used to attach the package cover to the package body. In that process, the container body is placed on a base plate and the container cover is placed on the open end of the container body, so that the corrugation on the outer periphery of the cover engages the flange on the end open of the container body. At least one and preferably two extendable arms having rollers are inserted into the inner section of the container body through the central opening of the container cover.

P1037 / 98 MX The extendable arms are then extended so that the rollers are located adjacent to the flange the body of the container and the ripple of the container cover. When the crimping rollers are then brought into contact with the matched or matching edges of the container body and the container cover, the ripple of the cover and the flange of the container body are sandwiched between the rollers of the extension arms and the rollers of the extension arms. Engargoladores rollers to form between them a seam or engargolado. During the formation of the seam or engargolado, the rollers of the extensible arms oppose the pressure of the crimping rollers. Either the base plate on which the container body rests or a rotating collar that rests on the cover and does not oppose the force of the engaging roller or both the base plate and the rollers can rotate the body of the container. container and the cover in synchrony with the interlocking rollers, to form a uniform seam or engargolado around the container. Instead of the rotatable container body and cover, the crimping rollers and the rollers of the extension arm can rotate synchronously around the body and the container cover. Although only a rotating extendable arm is required to carry out the process of P1037 / 98 MX engargolado, this arm must be rotatable to oppose both rollers of engargolado in sequence. A second arm, located approximately 180 degrees from the first arm is preferred since this configuration does not require the rotation of any arm within the container body. Other features and advantages of the present invention will be apparent from the following description of the invention which refers to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view, partially in cross section, of an aerosol container cover of the present invention. Figure 2 is a plan view of the aerosol container cover of Figure 1. Figures 3 and 4 are side views in cross section showing a first method for forming the aerosol container cover of the present invention. Figure 4A is a partial cross-sectional view of an alternative modification of the container body shown in Figures 3 and 4. Figures 5 and 7 are side elevation views, and Figures 6 are a plan view showing a P1037 / 98 MX second method to form the aerosol container cover of the present invention. Figures 8, 9 and 11 are views partially in cross-section and in lateral elevation of a method by which the cover of the present invention, which lacks a flared depression, engages a container body. Figure HA is an alternative embodiment of a rotating collar shown in Figures 8, 9 and 11. Figure 10 is a bottom view, along lines 10-10 of Figure 9, of the articulated mechanism used in the process of engargolado shown in Figures 8, 9 and 11.

DESCRIPTION DETAT-T-A? H nv4 THE INVENTION Referring to Figures 1 and 2, the cover 10 of the aerosol container of the present invention has a generally convex dome-shaped configuration. It consists of a metal, plastic or a metal-plastic sandwich, with a relatively thin or uncoated wall covering. The cover 10 has an outer periphery 12 with a corrugation 15 formed along its edge to enable attachment to an aerosol container body 20 shown in faint lines in Figure 1. The cover 10 also includes a central opening 14.

P1037 / 98 MX defined by an internal periphery 16 with a corrugated edge 17 for joining an aerosol nozzle. As the cover 10 extends from the outer periphery 12 to the inner periphery 16, it is generally rounded and, in a generally hemispherical, parabolic or elliptical shape. The configuration of the cover 10 allows it to withstand a significant pressure from inside the aerosol container 20 even when the cover 10 is relatively thin walled. In fact, the cover 10 can withstand distortion at package pressures above those that would normally break an aerosol can seam, ie, above 300 psig (2068 kPa or 20.7 bar). The cover 10 is usually formed of a thin-walled metal, such as, for example, steel or an aluminum alloy. If the cover 10 is made of steel, its wall thickness is in the range of 0.005 to 0.013 inches (0.127 to 0.330 mm) and its diameter is in the range of 1.77 to 3.00 inches (45 to 76.2 mm) and its weight in the range of 4 to 21 grams. If the cover is made of an aluminum alloy, its wall thickness is in the range of 0.005 to 0.018 inches (0.127 to 0.457 mm) and its diameter is in the range of 1.77 to 3.00 inches (45 to 76.2 mm) and its weight in the range of 1.5 to 11 grams). P1037 / 98 MX These wall thicknesses are below minimum level thicknesses that would allow distortion of the walls under a minimum gas pressure dictated by the government in the container, for example, 140 psig. But that need will not be a concern because the cover is predistorted and inverted before the container is filled and, the thin wall inverted cover will not be distorted or subsequently inverted at or above the minimum governmental pressure. A significant feature of the cover of aerosol container is its lack of a flared depression for a nibbling plate like that found in numerous conventional aerosol container covers. As previously mentioned, the flared depression in conventional casings is usually the weakest region of the casing and is prone to reverse when the aerosol casing is subjected to high internal pressures during its manufacture, transportation or storage. Thus, the cover 10 of the present invention lacks this disadvantageous feature and is resistant to deformation or, more resistant to deformation than conventional container covers having a thicker wall construction. A container cover for aerosol that has the P1037 / 98 MX distinctive shape of the cover 10 can be formed either before attaching the cover to a container body or after its attachment to a container body, as described below. The method by which the cover 10 is formed and the method by which the aerosol containers having a cover 10 are manufactured, depend on factors such as for example the material from which the cover 10 will be formed, the medium which cover will be attached to the container body and, if the engargolado will take place, the type of engargoladuras machines used, the speed of the engargoladura machine and, therefore, the cost. In a first method for manufacturing the cover 10 of the present invention, the cover initially has the shape of a conventional aerosol container cover having a flared depression for admitting to a nibbling plate. But it is made of a thin wall material as required in the cover 10 of the present invention. This initially formed cover 60 is shown in Figure 3 and includes a flared depression 62. The depression 62 in the initially formed cover 60 is defined between the outer wall 64 of the depression and the internal wall 66 of the opposite and radially spaced depression , which are connected through the 68th floor of the depression. if cover 60 is made of steel, it has a wall thickness P1037 / 98 MX in the range of 0.005 to 0.013 inches (0.127 to 0.330 mm). Depending on the wall thickness and the desired investment pressure and the type of seam or engargolado, the depression 62 can be made narrower, wider, shallower or deeper. Since the cover 60 includes a flared depression 62 for admitting the engaging plate, the cover 60 is attached to an aerosol container 20 by conventional crimping techniques, as shown by seaming or embossing 70 in Figure 3. The body 20 of the container may be of a thin-walled material, such as for example steel or aluminum, but may also be of a thicker wall construction such as for example that of conventional aerosol spray container bodies. It is shown that in body 20 of the container of Figures 3 and 4 is "flanged inwardly" but, it could be vertical below the seam or interlocking as shown in Figure 1. A sealing member 72, such as for example a elastic rubber seal, is tightly or forcedly fitted into a central opening 74 of the cover 60 as shown in Figure 3. The rubber seal 72 must have sufficient elasticity to form an air tight seal around the corrugation 73 in opening 74.

P1037 / 98 MX Extending through the seal 72 and, perhaps extending partially towards the internal area of the container 20 there is a tube 76 through which a pressurized fluid, such as for example air, can flow. In addition, a tension member 78, such as for example a spring, is in contact with the seal 72 to retain the seal 72 firmly within the central opening 74 of the cover 60. Although as a tension member 78 a spring is shown , an air cylinder or other similar device could be used. The pressurized air flows through the tube 76 and into the interior of the container formed by the cover 60 and the container 20 and sealed by the seal 72. If the cover 60 is made of steel with a wall thickness in the range of 0.005 at 0.013 inches (0.127 to 0.330 mm), the air pressure in the container 20 increases to only about 50 to 150 psig (345 to 1033.5 kPa or 3.45 to 10.34 bar) which is sufficient to cause the thin-walled cover 60 it deforms upwardly by compressing the tension member 78, as indicated by the arrows 80 of Figure 3, and additionally causes the outer wall 64 of the depression 66 of the depression 62 to move upwards to the point where the depression 62 is either completely eliminated or substantially eliminated as shown in Figure 4. By subjecting cover 60 to this P1037 / 98 MX internal pressure, the cover 60 adopts the desired convex dome configuration of the cover 10, as shown in Figure 4, which has a convex shape in a generally curved or almost hemispherical cross section as it extends from the outer periphery 12 to the inner periphery 16. The formed cover 10 is by the physical nature of its configuration, resistant to the additional deformation that results from the internal pressure inside the container, even at pressures that can break the seams of the container. It is also resistant to the downward pressure encountered in folding and gas evolution. After the cover 10 has been formed, the seal 62 is removed from the central opening 74, so that the body 20 of the package with the attached cover 10 can be filled with a fluid or viscous material and, after which, adapt to it. a nozzle for aerosol container in the central opening 74. If desired, the flattest part of the cover 10 in the seam or interlocking 70 can be made more hemispherical by designing the depression 62 and / or increasing the pressure of the investment. If this is done, it may be necessary to reinforce the double seam or double seam by using a peripheral rib 77 that extends outwardly into the body 20 of the container as shown in FIG.

P1037 / 98 MX shows in Figure 4A. An alternative method for forming the cover 10 of the present invention is shown in Figures 5, 6 and 7. Again, a cover 60, including a flared depression 62 for admitting to a nibbling plate, is joined by a processing of conventional engargolado to a container body 20. The corrugation 73 surrounding the central opening 74 of the cover 60 is interleaved or sandwiched between a two-piece collar 90 and either supported on a spring-loaded base plate together with the container body 20, or is suspended over the motherboard. Each member of the collar 90 includes a depression 92 that is curved to match or engage the curvature of the corrugation 73. Although it is shown that the collar 90 is two pieces, a one piece collar could also be used. A sealing device 96 of generally cylindrical shape having an inverted U-shaped cross-section is placed over the corrugation 73 in the central opening 74 of the cover 60. The sealing member 96 includes a resilient elastic ring 100 at its lower end so that between the sealing device 96 and the corrugation 73 of the central opening 74 a secure and air-tight seal can be formed. A P1037 / 9R MX hollow tube 102 extends centrally through the sealing device 96 and is connected to a source or supply of pressurized fluid material. Once the sealing device 96 has a watertight seal formed around the ripple 73 of the cover 60, the interior defined by the body 20 and the cover 60 of the container is pressurized by the flow of a pressurized fluid material through the tube. 102. The pressure to which the interior will be subjected will depend on the material of which the cover 60 is formed, as previously mentioned. Once sufficient pressure has been supplied to the interior, the cover 60 will turn outward or reverse until the depression 62 either is completely eliminated or substantially eliminated, resulting in a general transformation of the cover configuration. to the point where it obtains the pressure resistance configuration of the cover 10 as shown in Figure 7. After the cover 10 was formed by this pressurization process, the air tight seal between the sealing device 96 and the cover 10 is broken by the upward displacement of the sealing device 96. After this, the collar 90 places the cover 10 and the body of the container 20 on a base plate, in the case where they have been suspended and, after P1037 / 98 MX this, releases the cover 10 and body 20 of the container for further processing as an aerosol container. The cover 10 of the aerosol container of the present invention can also be formed by conventional punching techniques but, because it lacks a flared depression for a nibbling plate, conventional means for engaging the cover 10 to the body 20 of the container can not be used. container. One method by which the cover 10 can be engargolada to the body 20 of the package includes an articulated mechanism of four bars 200, shown in Figures 8, 9, 10 and 11. The four-bar articulated mechanism 200 includes two sets of linkages of bars. Each set comprises a first link 202 and a second link 204. The first and second links 202 and 204 have the same length and are connected to each other by a link link 206, which supports a carrier roller 208. Each first link 202 is connected at an opposite end of the linkage 206 with a stationary arrow 210 and, each second link 204 is connected at an opposite end of the linkage 206 in a disk-shaped yoke 212. Two retractable arrows 214 are fixed on opposite sides of the yoke 212 and extend through the openings in the stationary arrow 210 and, P1037 / 98 MX are adapted for the extensible and retractable movement through the stationary arrow 210. Alternatively, a single thinner central arrow could be used. A rotating collar 216 is positioned around the outer periphery of the stationary arrow 210 and is located above the first linkages 202. The rotating collar 216 is typically formed of metal and includes a depression 218 that extends around the upper periphery internal of the rotating collar 216 and the adjacent stationary arrow 210. The remainder of the portion of the inner periphery of the rotating collar 216 is shaped to match or engage the curvature of the cover 10. As shown in Figure HA, the rotating collar 216 may also include an insert 215 of a non-abrasive material. , such as, for example, rubber or plastic. The insert 215 extends along the internal periphery of the rotating collar 216 and of its insert 215 which contacts the cover 10 during the crimping process. The four-bar articulated mechanism 200 and, specifically, the diameter of the yoke 212 and the stationary arrow 210 should be dimensioned so that they can be adjusted through the central opening 14 of the cover 10.

P1037 / 98 MX During the process of engargolar to the cover 10 with the body 20 of the container, the cover 10 is placed at the open end of the body 20 of the container, so that the undulation of the outer periphery 12 is adjacent to the flange of the open end of the container body 20. Referring to Figure 9, the four-bar articulated mechanism 200 is located through the central opening 14 of the cover 10, so that the rotating collar 216 rests or rests securely on the cover 10. The retractable arrows 214 they retrace in an ascending manner causing the four-bar articulated mechanism to collapse, so that the first and second linkages 202, 204 are parallel to each other, which thus places the carrier rollers 208 so as to meet the internal periphery of the open end of the body 20 of the container, as shown in Figure 11. A first nip roll 220 having a contoured groove 222 is located against the corrugated outer edge of the cover 10. In this way, the ripple of the cover 10 and the flange of the body 20 of the container are sandwiched or sandwiched between the first nip roll 220 and one of the nip rolls 208. By the force of compression exerted by the engaging roller 220 and the opposite by a carrier roller 208, on the cover 10 and the body 20 of the container is made P1037 / 98 MX a first engagement operation, while being rotated by the collar 216. A powered rotating base plate can also be used. After the first stitching operation is completed, the first nip roll 220 is retracted and a second nip roll 224 having a contoured nip 226 which is flatter than the contoured nip 222 is placed against the first stitch and, similarly, a second engaging operation is performed while the collar 216 rotates the cover 10 and the container body 20 through the compression engagement of the second engagement roller 224 and a carrier roller 208. Once the second engaging operation is complete, the retractable arrows 214 extend completely, so that the articulated mechanism 200 returns to its original configuration. The mechanism can then be removed from the interior of the container body 20 through the central opening 14 of the cover 10. Once the cover 10 of the present invention is engargolada to the container body 20, the completion of the container can be continued for aerosol, filling the body 20 of the container with a fluid material and a propellant, and adding an aerosol nozzle in the central opening 14 of the cover 10.

P1037 / 98 MX Although the present invention has been described in relation to the particular embodiments thereof, many other variations and modifications and other uses will be apparent to those skilled in the art. It is therefore preferred that the present invention be limited not by the specific presentation or disclosure herein but only by the appended claims.

P1037 / 98 MX

Claims (28)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property; A cover for an aerosol container, comprising: a cover having a relatively thin wall with an outer periphery adapted for connection to an aerosol container body and a central opening defined by an internal periphery, the cover has a dome shape generally rounded as it extends from the outer periphery to the inner periphery and without a flared depression in the vicinity of the outer periphery, to admit a nipple plate.
2. 2. A container for aerosol, comprising: a container body having an open end with an edge defining said opening; a cover having an outer edge and the outer edge of the cover is attached to the edge of the container body, the cover has a central opening; an aerosol dispensing means disposed or located in the central opening of the cover; and the cover has a dome shape usually P1037 / 98 MX convex as it extends from its junction with the container body to the central opening and is free of the flared depression in the vicinity of its connection or connection to the container body.
3. 3. The aerosol spray container according to claim 2, wherein the cover is made of steel and has a wall thickness in the range of 0.005 to 0.013 inches (0.127 to 0.330 m).
4. 4. The aerosol spray container according to claim 2, wherein the cover is made of aluminum and has a thickness in the range of 0.005 to 0.018 inches (0.127 to 0.457 mm).
5. 5. A cover for an aerosol container, comprising: a steel cover having an outer edge and a central opening defining an inner edge, and having a generally convex dome configuration as it extends from the outer edge to the edge interior and, the roof has a wall thickness in the range of 0.005 to 0.013 inches (0.127 to 0.330 mm). The cover according to claim 5, wherein the cover has a diameter in the range of 1.77 to 3.00 inches (45 to 76.2 mm) and a weight in the range of 4 to 21 grams. 7. A cover for an aerosol container, which P1037 / 98 MX comprises: an aluminum alloy cover having an outer edge and a central opening, defining an inner edge and having a generally convex dome configuration as it extends from the outer edge to the inner edge, the cover has a wall thickness in the range of 0.005 to 0.018 inches (0.127 to 0.457 mm). The cover according to claim 7, wherein the cover has a diameter in the range of 1.77 to 3.00 inches (45 to 76.2 mm) and a weight in the range of 1.5 to 11 grams. 9. In a method for manufacturing an aerosol container having a cover with a central opening and an outer periphery and a container body with an open end, the cover is thin-walled and has a flared depression in the vicinity of its periphery outside, the steps comprise: joining the cover with the open end of the container body; sealing the central opening of the cover, the seal has a device by means of which a pressurized fluid material flows into the interior defined by the cover and the body of the container; and pressurize the inside by dispensing a pressurized fluid through the device to a pressure that P1037 / 98 MX causes the thin wall cover to deform outward to substantially eliminate the flared depression. 10. A cover for an aerosol container manufactured by the method of claim 9. In a method for manufacturing an aerosol container using at least one extendable arm carrying a carrier roller, the aerosol container has a cover for thin wall with a central opening and a container body having an open end, the cover has a corrugated outer edge and does not have a flared depression in the vicinity of the corrugated edge, the container body has a flange around an edge of its open end, the steps of: placing the wavy outer edge of the cover over the flanged edge of the container body; placing the at least one extendable arm and the carrier roller inside the body of the container; place a crimping roller on the outside of the container body; the carrier roller and the nibbling roller are placed opposite each other; and forming a seam or engargolado of the corrugated outer edge and the flanged edge, compressing them together between the carrier roller and the engargolado roller. P1037 / 98 MX 12. A method for deforming the cover of an aerosol container adapted to be attached or connected to an aerosol container body, the cover is thin walled and has a central opening, an outer periphery and a flared depression extending circumferentially in the vicinity from the outer periphery, the flared depression defined by two radially opposed and slightly separated sides connected by a bottom or bottom of the depression, the steps of the method comprise: securing the outer periphery of the cover with an open end of a container body for aerosol and thus define an internal region of the container body and the cover; sealing the central opening of the cover with the seal having a pressurized fluid supply means; and pressurizing the inner region by dispensing a pressurized fluid material through the supply means and into the inner region and up to a pressure to deform the flared depression, causing the sides of the flared depression to move or move upwardly and push up the bottom or lower part of the depression. 13. A cover for an aerosol container P1037 / 98 MX manufactured by the method of claim 12. 14. A method for forming a cover for an aerosol container having a container body, the cover has a central opening, an outer periphery and a radially flared depression in proximity to the outer periphery; the container body is generally cylindrical and has an open end defined by an edge, the method comprising the steps of: attaching the outer periphery of the cover to the edge of the container body; and flipping out the radial flared depression in the cover to thereby eliminate at least substantially the flared depression. 15. A cover for an aerosol container manufactured by the method of claim 14. 16. An apparatus used in the engargolado of an aerosol container cover having a central opening defined by an internal periphery, an external periphery and not has a flared depression for admitting a nibble plate with a container body, the apparatus comprising: at least one extendable arm that carries a carrier roller; a stationary arrow, the extendable arm is attached at one end to the stationary arrow; P1037 / 98 MX a yoke, the extendable arm is attached at one end opposite the yoke; at least one moving arrow attached at one end to the yoke and extending from the stationary arrow; the extendable arm, the yoke, the stationary arrow and the moving arrow are a unit sized to pass through the central opening of the cover and, when the unit passes through the central opening of the cover, the moving arrow adapted for retracting and causing the extensible arm to collapse and in this way locate the carrier roller in opposition to a crimping roller to engagulate the container cover to the body thereof. The apparatus according to claim 16, further comprising a rotation collar located around the stationary arrow and adapted to engage with the container cover to rotate the cover and the body of the container during crimping. 18. The apparatus according to claim 16, wherein the at least one extendable arm includes a first link attached at one end to the stationary arrow and a second link attached at one end to the yoke, the first and second links are joined together by means of a connecting link carrying a carrier roller. 19. The apparatus according to claim 18, which P1037 / 9T MX further comprises a second extendable arm generally opposite the extendable arm, the extendable arms constitute a four-bar articulated mechanism. 20. A cover for an aerosol container, comprising: a cover having a thin wall thickness and an outer periphery adapted to be attached to an aerosol container body and an inner periphery adapted to be attached to an aerosol dispensing means.; and the cover has a sufficiently thin wall thickness such that the distortion or inversion of the cover is expected at pressures substantially lower than the minimum distortion and / or investment pressures dictated by the government and, the cover has a shape that the makes distortion or investment resistant to the minimum distortion and / or investment pressures dictated by the government. The cover according to claim 20, wherein the cover is free of flared depressions. 22. A container for aerosol, comprising: a container body having an open end with an edge defining said opening; a roof that has a thin wall thickness and an outer edge, the outer edge of the roof P1037 / 98 MX is attached to the edge of the container body, the cover has a central opening; an aerosol dispensing means is disposed or located in the central opening of the cover; and the cover has a sufficiently thin wall thickness such that the distortion or inversion of the cover is expected at pressures substantially lower than the minimum distortion and / or inversion pressures dictated by the government and, the cover has a shape that makes it resistant to distortion or investment to the minimum distortion and / or investment pressures dictated by the government. 23. The cover according to claim 22, wherein the cover has a generally rounded dome shape. 24. A method for forming an aerosol container, wherein the container has a container body with an open top and a cover on the open top of the container, the method comprising: supplying a cover of a material with wall thickness sufficiently thin such that the distortion or inversion of the roof is expected at pressures substantially lower than the minimum distortion and / or investment pressures dictated by the government; conform to the cover in a generally P1037 / 98 Dome MX without a flared depression near the periphery thereof, so that the cover is not distorted at the minimum distortion and / or inversion pressures dictated by the government on the package with the cover placed on the package; and apply the cover to the open end of the container. 25. The method according to claim 24, wherein the cover is formed before the container is pressurized with the cover on the container. 26. The method according to claim 25, wherein before forming the cover, the cover is placed on the open end of the container. The method according to claim 26, wherein the cover is formed by pressurizing the container, with the cover placed in place on the container. The method according to claim 26, wherein the cover is formed by a mechanical operation thereon to give it the general dome shape. P1037 / 98 MX SUMMARY OF THE INVENTION An aerosol container cover having a central opening for a nozzle and an outer edge adapted to seal the connection or connection with the open end of the aerosol container body. The aerosol container cover is made of a relatively thin-walled metal, with a wall thickness in the range of 0.005 to 0.013 inches (0.127 to 0.330 mm) if the metal is steel and, which is 0.005 to 0.018 inches (0.127). to 0.457 mm) with wall thickness if the metal is aluminum. The cover is thinner wall that would prevent distortion or inversion of the roof at the minimum pressure levels dictated by the government in the aerosol container. The cover has a generally convex dome shape as it extends from its outer edge to the central opening and is free of any flaring depressions in the vicinity of its outer edge. In a method for manufacturing the aerosol container cover, the cover is attached to a container body by conventional crimping processing. The cover, in its initial stage, has a flared depression in the vicinity of its outer edge which is used in the process of engargolado to admit a plate of engargolado. After this, the flared depression is reversed by pressurization. In a method for engargolar P1037 / 98 MX the thin-walled cover of the present invention to an aerosol container body, the cover, which does not have a flared depression, is placed over the open edge of the container body. One or more extendable arms are located on the body of the container to oppose the engaging rollers and thereby attach or connect the cover to the body of the container. P1037 / 98 MX