ES2265053T3 - CAN BODY WITH AN EXTERNAL BACKGROUND COVER. - Google Patents

Abstract

A can body with a jacket-like closed wall and a base constructed on one end of the can wall includes an external base covering in the form of a sheet material. The base covering is fixed into position on an annular connection region of the can body. The base covering can form a basically flat imprintable region in a main region that is surrounded by the connection region. If a bar code can be applied in this imprintable region, then a restriction of the configuration possibility of the can wall disappears. The base covering can form a stand region whereby a standing can body is only in contact with the support surface if necessary via the base covering, and consequently the occurrence of corrosion problems is prevented. A retaining device that leaves the base of a held can body free and a position fixing apparatus are used for fixing the base covering into position. A decorative foil on the exterior of the can wall can be overlapped by the base covering, which serves to prevent a detachment of the decorative foil on the base.

Description

Tin body with a bottom cover Exterior.

The invention relates to a can body according to the preamble of claim 1, to a method according to the preamble of claim 11 and a device according to the preamble of claim 14.

The invention relates to containers or cans that on one of the front sides of a closed wall shaped wrapper comprise a bottom and in which at least one layer of the Wall and bottom is preferably formed of metal. Such containers are molded, for example, as aerosol cans or as drink cans. Both aluminum and sheet metal cans are manufactured of steel. To give the containers a desired appearance and place the necessary information, the wall shaped wrap is provided with a decoration and a lettering. The Decoration is stamped almost directly on the can. However, if necessary, the decoration is printed on labels or sheets which are then placed on the can wall. In the procedure of usual impression, by color used a cylinder of Print. Correspondingly, printing costs increase With every color needed. Next to decorative signs or graphically configured should also be placed in the can usual information such as a barcode, Hazard warnings and product composition as well as, if necessary, information on promotions. In this sense, in the Tin wall the barcode is printed with dark color, preferably black, on a light background, preferably white, which strongly counteracts the aesthetic effect of the decoration, especially when the entire surface is dark. Also, for the two colors are needed most often additional with the corresponding printing cost. Right now only that number of cans that must be taken out can be manufactured market with the current barcode or advertising information current. In the event that the same can must reach the market in a later moment with another barcode, then they must be made again with old and new decoration cans barcode, or new advertising information. Given the case an adhesive is manufactured with the new barcode, which sticks about the old barcode or the old information advertising, but that is linked to a lot of expense and is not aesthetically satisfactory. Nor is it aesthetically satisfactory than in cans with a transition zone curved from the bottom of can to the tin wall can not be stamped the decoration in the area of transition according to the background configuration, what in a can vertical on the bottom is shown as a bottom edge Unsightly or unprinted.

Due to lower manufacturing costs, Currently, more and more products are sold in tin cans steel. It has now been shown that such steel sheet cans, especially when used in damp places, they oxidize at the bottom. The cans are, for example, longer with their surface ring support on a wet surface, if necessary, soiled with other substances In this sense, both moisture and these added substances as well as electrical effects can cause corrosion. Even in the case of plates that are provided with a thin layer of chromium, no oxidations were observed desired. Corrosion leads to surface fouling on which the can is and weakens the bottom of the can. If from a spray can a weakened can bottom is dangerous, especially in the use of butane or propane as a propellant gas. To keep the pressure inside the can fixed, the cans spray have a bulging bottom with respect to the inside of the can. This fund is configured by a pressing process and comprises a bulging area from the center inward and an annular lateral zone protruding out, into which the bottom of the can becomes in the tin wrap. The cans are on the side area annular, which can be weakened by corrosion along the support line, so that the central area of the background. In the case of tin material with a thin layer of chrome, the chrome layer can be damaged or removed along the line of support through friction movements in transport equipment The packaging machine, so that the corrosion protection precisely missing partially in the endangered lateral area of corrosion The cans whose bottom is attached to the wrap by a tab they have a narrow annular edge, vertical towards below that can be easily damaged or oxidized. Corrosion, and given the case also other chemical or electrical effects, lead to unwanted colorations of the surface on which the can.

From documents EP200098A2 and EP208564, in two and several pieces cans, solutions are known in which the Pieces are joined with laser beams. In this sense, the pieces that are going to join are arranged grooved, overlapping or also topped each other orthogonally. The laser welding bead is configure, for example, frontally through a continuous position or also angular. The solutions described are not aesthetically attractive and can not prevent possible corrosion at the bottom.

From US4455850 a can of drink in which the bottom area bulged from the center towards Inside is coated with a matt color. In this way, you must prevent sunlight from approaching the concave bottom of the can and, in this way, it could cause a fire of the thrown cans outdoor. The coating does not extend through the area of annular transition, so that the problem of corrosion. In addition, the color on the flat sheet is sprayed, of way that in the perforation of discs of sheet and in the drawing deep cans should pay attention to the color spots applied round be achieved exactly centrally by die cutting tools, which is attached to a high manufacturing expense Even when the color extended by the annular transition zone, the color layer after drawing deep in the can and bottom pressing would no longer be continuous. The friction of the transition zone in transport mechanisms of packaging facilities would also lead to layer damage color. But without the continuous color layer there is again the Corrosion hazard already mentioned.

From US5992892 a can of drink in which in the bottom area bulged from the center towards Inside is an information stamped on the finished can Covers with a scratch coating. This solution makes possible a advertising game in which the buyer of a can can determine after scratching the coating if you have gained something according to the information below. The transition zone annul with the support ring remains uncoated, so that the corrosion problem is not solved. In addition, the scratchable or scratchable coating is not suitable for constantly cover the support ring. The capacity of coating removal is decisive for the game advertising

Document US6073797 shows a cover that can fit on a can of drink on the upper front side With the exit opening. For the lid to be attached hooked to the can, at the end of the can an annular zone must be configured that protrudes out through which an annular area can be molded correspondingly elastic of the lid, until it hooks. A Cap of this type is very expensive to manufacture and adapt. Also no can be adapted to the bottom of the can because the area is missing override it sticks out.

From document US5711447 another cover is known that it can only be threaded into the outlet opening of a can of drink The screw cap of this lid needs in the can of drink outward nerves that match the vertical elements inward in the lid. The characteristics of the can and lid needed for the use of the lid are extraordinarily expensive to manufacture. In addition, there is a large expense in screwing the lid to the can. Therefore, the possibility of arranging a promotional item in a screw cap Such is also linked with a great expense.

From WO96 / 24539A1, beverage cans with separable cover elements are known in which the cover elements hide the upwardly dome or concave vertical bottom area from the inside of the can. A closed hollow space is formed at the bottom of the can. The cover element is inside the outer edge surfaces of original cans. In the closed hollow space between the cover element and the can bottom can be arranged advertising objects that can be removed after tearing the element of
cover.

From DE19956784 cans of drink in which the emptying takes place hygienically after of opening the can lid. In addition, over the opening of the can closed, an anti-abrasion sheet is arranged, so that in the Can lid does not accumulate neither dust nor liquids.

The present invention is based on the objective of find a simple solution to allow cans advantageously aesthetic and safe against damage to the bottom of the can. In the background, a possible corrosion should be prevented.

This objective is achieved through characteristics of claim 1 or claim 11 or of claim 14. The dependent claims describe preferred or alternative embodiments.

Upon reaching the goal it was recognized that both corrosion problems such as aesthetic problems can resolved by placing an outer bottom cover in the form of a flat material. The flat material is fixed to an area of annular union of the can body. When the union is configured to along a closed circumference, then the cover of membrane-shaped bottom obtains high stability. The bottom cover is configured essentially flat in an area main that is surrounded by the annular junction zone and comprises preferably stamping a barcode. If the code of bars can be placed on a bottom surface essentially flat, then the adverse effect of the possibility of tin wall configuration. For printing the tin wall decoration is also not needed any roller Barcode printing. They can be manufactured large quantities of tin bodies with an attractive usual decoration on the can wall. On the bottom cover are printed possibly different information or information that is not same for all countries, such as the barcode or also the expiration date, or aesthetically annoying information. These background coatings, if different, can be printed shortly before the packaging of product loads individual and look at the usual can body. Thus, the same cans can be used for all countries and all packaging loads Because the bottom cover can set flat in the barcode area, the code of bars can be read better than a barcode placed on the curved wall of the can. If the coating on the outer side of the tin wall extends in the form of at least one layer of color or a decorative sheet to the outer edge of the roof of background, then a metallic edge can be prevented from seeing in the lower end of the can. If necessary, the bottom cover covers a fixed annular area of the can body that protrudes towards below and thus prevents the appearance of corrosion problems.

The bottom cover is configured preferably in the form of plastic flat material. It is obvious that flat material with at least one layer can also be used metal, especially aluminum or steel, or also with a layer of cardboard. In this sense the layer that confers is covered stability, if necessary with plastic. Flat materials used should ensure a robust bottom cover that is not damage the transport mechanisms of the facilities of packed and also remain as resistant as possible to be on wet supports. All flat materials above mentioned can be provided with a sealing layer and with it stamped at the bottom. In the use of metal sheets you can incorporate the heat necessary for the sealing process, given the also inductively. Instead of a sealing joint, to fix the bottom cover can also be set, given the case, a hitch joint or a welded joint, especially with At least three laser welding points.

It is clear that the bottom cover according to the invention is not limited to application in cans. There's also containers, especially plastic bottles, whose bottoms they comprise an annular bottom area that protrudes downwards and to which, therefore, a bottom cover can be fixed. Although plastic containers there is no danger of corrosion, it is advantageous to use the bottom cover at the bottom of the container for the provision of the barcode and advertising information

If on the outer side of the can wall you set up a decorative layer in the form of at least one layer of color, but preferably as a decorative sheet, then the bottom cover can be configured in such a way that the layer decorative extend at least to the outer edge of the bottom cover. But preferably the decorative layer overlaps on Part bottom cover. This prevents the use of sheets decorative sheets that can be separated in the extreme area lower body of can.

In the use of decorative sheets, a can body can be manufactured with a can wall and bottom correspondingly profitable to the respective needs. A decorative sheet is then placed on the tin wall, where appropriate, so that the impression of the can body can be waived. If the can wall and bottom are pressed from a single piece, such as in aluminum aerosol cans or in steel sheet cans, then the intensive cleaning and drying necessary for printing can be waived. In the case of closed sheets in a circular direction that overlap the bottom cover, a detachment of the sheet can be excluded. If the can body is comprised of a wrap and a bottom, then these two pieces can be joined together by a bead, if necessary a beaded bead, but preferably a weld bead, especially a laser bead. A decorative sheet is only preferably applied after this joining stage, in which preferably by using a shrinkable sheet, especially with a sealing layer oriented to the can body, a tight and especially fixed adjustment of the sheet to the sheet can be ensured. tin body If the can wrap and the bottom are joined by a crimped joint, then the crimped joint can also be configured, if necessary, after the application of the decorative sheet, in which then the crimped cord would assume the holding of the sheet in the lower end of the
can.

The bottom cover, or if necessary also the decorative sheet, allows to cover the joint between the wrap and the background, so that this union should not be very demanding from the aesthetic point of view. In the use of a cord welding or laser bonding the annular junction zone is formed, preferably by an extreme area of the can wrap that stands out at the bottom, in which this extreme area is especially something retracted towards the can axis and forms the area of annular junction In a beaded cord, it can be configured in the bottom of the can and, if necessary, pressed inwards of the can in such a way that a wrapping area can be used curve as an annular junction zone. In these described variants, a bottom cover fixed to the annular junction area covers the respective binding cord.

To provide a can body aesthetically appealing, the transition from the can wall to the bottom cover is configured in longitudinal section in the form of a circular segment, preferably presenting a radius of curvature in the range of 1 to 6 mm, especially of essentially 3 mm.

Thanks to the bottom cover it is now possible provide, for example, a can of steel sheet spray of two or three pieces that looks like an aluminum can of one piece. The possibilities of realization in the background area already They were described above. To configure the valve seat on the upper front side of the can, in the case of a can of two pieces can be provided a shrinking process by highlighting or in the case of a three-piece can the use of one piece upper terminal with valve seat.

It is clear that the invention comprises all solutions that result from the combination of features described. The variation of the characteristics includes, by example, the selection between cans of one, two or three pieces; at case of cans of two and several pieces, the choice of different ways of joining between the pieces, foreseeing or suppressing a sheet decorative, the choice of a specific bottom cover and its can body assurance, as well as the choice of material for the can and bottom cover. Even combinations Unexpected can lead to advantageous solutions. For example a one-piece aluminum can with a bottom cover that comprises steel plate that can be magnetized has the advantage of that this can can be transported with conveyor belts magnetic with use of magnetic clamping forces with different orientations of the axes.

The possibility of immobilizing a sheet decorative on the lower end of the can with the cover of background opens a varied use of decorative sheets. These sheets are printed, if necessary on their outer side, but preferably on the side facing the can body. In a transparent sheet that is printed on the back or on the side oriented to the can body, the printed layer is protected by the sheet so that no adverse effect of the decoration conditioned by friction. After printing, a sheet can also be provided on the printed layer transparent printed on the back with a sealing layer that Through the printed layer it also guarantees a sealing joint between the sheet and the can body. To be able to contract the sheet to the can body, in a first stage a piece of sheet is molded to give a closed sheet wrap and join each other in both lateral lines oriented to each other, producing preferably a seal joint. This foil wrap has a cross section smaller than the can body and with it can be molded by the can body and contract with can of heat, as well as stamping. After placement of the decorative sheet is fixed to the bottom cover so that partly overlap the end of the sheet at the bottom. It is evident that the bottom cover can also be set, if necessary, override, so that you securely hold the blade end to the body canned, but don't completely hide the bottom of can.

The placement of sheets in a can body is knows, for example, of document EP1153837A1, but in which the Printed layer should not be applied on each sheet section until the edge of the sheet, or an unprinted sheet edge is needed. According to this known solution, a sealing layer disposed between the sheet and the printed layer should remain open in the configuration of the closed foil wrap to produce a cord of sealed. Therefore, the printing and subsequent cutting of the sheet continuous must be exactly adjusted, which in the case of a thin sheet cannot be achieved with a simple effort due to its elastic deformability. Here is a simplification by the present invention Because it is applied on the printed layer a sealing layer, the printed layer can be configured continually. The cutting of the pieces of sheets should not match precisely with printing and always guarantees configuration of a sealing cord.

A sufficiently contractable sheet can ensure that the decorative sheet fits without wrinkles in the area background retracted after the contraction process and, given the case, also to the body in a retracted upper end zone. Due to the weld seams and especially the laser joints they can be configured in such a way that the body surface of can also be essentially smooth in the cord area, after of the application of the decorative sheet and the bottom cover it can no longer be recognized that the can body was brought to the shape desired by laces. In the case of cylindrical can bodies molded, for example a rectangular sheet, with a cord longitudinal to give the tin wrap. It would also be possible Compose the tin wrap of two or more pieces of wrap with two or more longitudinal cords so that, if necessary, produce a wrap that diverges from the cylindrical shape. The divergence of a cylindrical shape can appear both in the cross section as in the longitudinal direction.

To also be able to fix on the upper end from the can an extraordinarily decorative sheet safe to the can body, if necessary, there can also be provided an annular cover element. This top cover element it is formed in aerosol cans, if necessary, by a partial area of the valve or by a part secured in the valve seat. Is Obviously at the top end of the can you can also be fixed, analogously to the bottom cover by a joint sealed, a hitch joint or a welded joint, especially with at least three laser welding points, hiding this piece the upper end of the sheet and thereby protecting it from being torn.

Sheet end concealment at least in one can end, especially below, makes it possible to give up to an exact cut of the sheet or of the sheet wrap in direction of the can axis, without this way manifest an unsightly end. In addition, wrinkles are hidden from the bottom cover or the annular cover element that could form in the contraction of the extreme areas strongly shrunk

Embodiments must also be understood in which the bottom cover fits directly to the bottom with a surface adapted to the shape of the bottom and especially injected directly into the bottom as a molded part by injection.

The solution according to the invention opens new configuration possibilities for cans. In addition, they result simplifications in the manufacture of cans that allow composing the cans directly in the packaging machine. This has the advantage that expensive space transportation can be given up empty cans of a facility to manufacture cans until Different packaging facilities. The cans are made up, by example, of a piece of flat sheet from which the envelope is formed, of a bottom piece, a top end piece and a cover of background, as well as a decorative sheet. The background pieces, the top end pieces and bottom coatings can stack with less free space and therefore can be transported from a space-saving way like stacks of sheet metal pieces flat and sheet rollers.

The drawings explain the solution according to the invention by an embodiment example. In this sense, sample

Figure 1 a vertical section of a can spray according to the state of the art,

Figure 2 a sectional sectional view of a spray can with a bottom cover,

Figure 3 a sectional sectional view of a spray can with a bottom cover and an article advertising,

Figure 4 a vertical section of a can of spray and a device to place a bottom cover,

Figure 5 a vertical section of a can spray with a bottom cover, in which the can body is It consists of three pieces,

Figure 6 a detailed section of the area of bottom of a can according to figure 5 with a bottom cover that is fixed by sealed or welded joint,

Figure 7 a detailed section of a can with a bottom cover that is fixed by joining by hitch,

Figure 8 a detailed section of a can with a bottom cover, in which the bottom and the tin wrap they are joined by a crimp joint, and

Figure 9 a detailed section of a can of a piece with a bottom cover that is fixed by union by hitch.

Figure 1 shows a can body 1 according to the state of the art with a closed can wall 2 shaped like wrap and a bottom 3 configured on the lower front side of the tin wall 2 It is an aerosol can, whose bottom 3 is domed with a central 3rd zone towards the inside of the can. Around the central zone 3a a lateral zone 3b is configured annul that protrudes down. The cans stand on a line of support of the annular lateral zone 3b where it can be weakened by corrosion the support line, so that zone 3a Central could break. The can wall and bottom comprise a metallic layer 5 On the outer side of the can wall 2 or the metallic layer 5 is arranged a decorative layer 4 that is extends from a valve seat 6 through the conical neck and the zone of the wall 2 of the predominant can until the transition zone from can wall 2 to bottom 3. Below the bottom edge of the decorative layer 4 can see an uncoated can area.

Figure 2 shows an embodiment preferred of a spray can 1 with a bottom cover 7 exterior that is fixed in the form of a flat plastic material to the annular lateral zone 3b protruding down from bottom 3 with a union 8 sealed. Therefore, the lateral zone 3b forms a zone of union in which the bottom cover is fixed 7. The bottom cover 7 comprises a contact zone 7b that conforms to zone 3b side. The sealed joint 8 extends at least one area part of contact zone 7b and preferably formed by means of a sealing layer arranged in the bottom cover 7, which was sealed by a sealing mechanism with zone 3b side. It is evident that the junction between the lateral zone 3b and the Contact zone 7b can also be achieved with a glue.

Decorative layer 4 can be configured as coating of the outer side of the can wall 2 in both the form of at least one layer of color as in the form of a sheet decorative The decorative layer 4 preferably extends to the less to the outer edge of the bottom cover 7. In the form of embodiment shown, the decorative layer 4 partly overlaps by the bottom cover 7. This prevents layer 5 metallic be accessible in the background area. This excludes a corrosion hazard

The flat plastic material of the cover of bottom 7 has a layer thickness of at least 0.02 mm, but preferably in the range of 0.08 to 0.8 mm, especially of 0.2 to 0.6 mm. This can guarantee resistance necessary for different mechanical stresses.

The bottom cover 7 comprises a zone 7a main surrounded by the contact zone 7b or the inner edge of the sealing joint, which is preferably configured essentially flat and especially includes stamping a Barcode. If necessary, the bottom cover 7 comprises a tearing mechanism that is configured, for example, in the form of a weak tear line in the main 7th zone. Through the torn by a tongue along the tear line can separate a part of the main zone 7a from the can or at least get down On the inner surface of this piece may be placed a lottery information that is accessible through the torn. A bottom cover 7 that can be torn makes it possible effective advertising effects.

Figure 3 shows a bottom cover 7 with a first and a second surface 7c and 7d partial cover, in which the first partial cover surface 7c is joined by the joint 8 sealed with the lateral zone 3b of the bottom 3 and the second 7d partial cover surface is detachably fixed from the first partial cover surface 7c. To be able to separate the partial cover surface 7d is configured, for example, a Grip groove 7e on partial cover surface 7d. If the first partial cover surface 7c in the central zone presents an opening, then after the separation of the second partial cover surface 7d can be removed a Article 9 advertising arranged between the central 3rd zone of the fund 3 and the bottom cover 7. The bottom cover 7 makes possible Various advertising effects. 7d partial cover surface can be configured, for example, as a piece to collect that also on one side it presents a motive or image and, if necessary, on the other side a denomination. Article 9 advertising and or the partial cover surface 7d may comprise points for Collect, lucky sayings or recipes. Yes in the body of can beverages are packaged, then instead of the advertising item in the hollow space between the bottom of the can and the bottom cover is Provides, if necessary, an additive for beverages, such as vitamins, alcohol, stimulants or sweetener. Would also be advantageous to sell medicines directly with water, in which the medication would be available with the water between the bottom of the can and the bottom cover of the container.

Figure 4 shows a device with which bottom cover 7 can be stamped in zone 3b annular side protruding down from the bottom 3. The device comprises a clamping mechanism to hold the can body and a sealing mechanism 10 with an annular sealing surface 10a which adapts to the lateral zone 3b of the bottom 3. To heat the sealing surface 10a to a desired temperature, at sealing surface 10a is associated a device 10b of heating. The clamping mechanism must be configured in such a way so that the sealing surface 10a can move towards the bottom 3. In the embodiment shown, the clamping mechanism it comprises a centering mechanism 11 which runs annular around the sealing mechanism 10 to accommodate the bottom 3 of the can and a mechanism 12 cable glands that, in cooperation with the mechanism 10 sealing, a desired compressive force is achieved between the bottom cover 7 and bottom 3 of the can body 1. So that the bottom cover 7 must not move from the sealing mechanism 10 heated to the bottom 3, the sealing mechanism 10 comprises preferably an introduction mechanism 13 that can move with respect to the sealing surface 10a. In the accommodation of a bottom cover 7, which if necessary can be introduced by a side, the introduction mechanism 13 is arranged on the sealing surface 10a. After the use of a body 1 can in the centering mechanism 11, the bottom cover 7 of the feed mechanism 13 moves to the bottom 3. A then the annular sealing surface 10a presses the area 7b contact against side zone 3b until heat introduced has achieved the desired seal joint 8. It is obvious that the clamping mechanism and the sealing mechanism can be configured according to prior art solutions. Too it would be especially possible to provide a clamping mechanism that only hold the can body on one side or hold this one with the bottom up. To perform the sealing joint between the bottom of the can and the bottom cover, at least one machining station preferably comprising a table rotating which are associated with sealing mechanisms that rotate jointly. In this sense, the sealing can be done during the rotational movement of the rotary table. A station of such machining can be arranged, for example, in the operation of packaging before or after packaging.

Figure 5 shows the can body 1 of a aerosol can 1, the can body 1 being composed of a wrapper piece 1a and a bottom piece 1b. The layer on the junction between bottom piece 1b and wrapper part 1a is covered by the bottom cover 7. The wrapping part 1a is provided of a decorative layer 4 that, if necessary, was directly stamped on the cylindrical can body. If the wrapper piece 1a is form from a sheet by molding and placement of a cord welding, then decorative layer 4 can also be stamped previously on the flat plate. At the upper end of the body 1 can a valve seat is configured by shrinking and Molding highlighted in the opening. If necessary, directly after a decorative sheet is coated by shrinkage which extends especially essentially to the extreme edge of the wrapping piece 1a, so that the end of the sheet is immobilizes after molding in the opening at the edge of the can molded

If decorative layer 4, especially the sheet decorative, does not extend to the top edge of the can, then, at the upper end of the can, a top cover piece 14 covering at least the extreme area of the can without decorative layer. If the can body is formed from of three pieces, then in the 1st piece of wrapping it should be fixed an upper end piece with the valve seat. According to him state of the art, this is done with a bent or given cord the case by welding (document EP208564B1). The cord zone unattractive that is formed in this between the upper end piece and the wrapper piece 1a can be hidden by the piece 14 of Top deck. In the case of an aerosol can, in the case of the upper cover piece 14 is a piece joined with the valve that always sits on the can after the use of the valve. By forecasting parts 7.14 of cover can be provided three-piece cans in which it is not recognizable to the consumer that the can body 1 is composed of different pieces. Basically all can be used the types of joint known to hermetically join pieces of cans

In the embodiment according to figure 5, the bottom piece 1b is joined with an annular welded joint with the 1st piece of wrap. In the background a lateral area of the bottom piece 1b to the wrapper piece 1a adjacent to the bottom edge of wrapper part 1a. Welded joint can be angular or also be configured in the contact zone of these two pieces. It is evident that the pieces can also be welded grooved together, that at least one of both joints could be configured as a crimped joint or that only one connection is provided lower or only higher. Without the use of an upper end piece, the wrapper piece 1a must shrink strongly for the formation of the valve seat which, in the case of different materials, is linked with great expense, especially with many stressed retraction stages, and if necessary problems Unsurpassed Due to the possibility of coverage can be chosen an optimal composition of the can body without this showing Negative in appearance.

If the can body is provided with a foil decorative, bottom cover 7 can be used and if necessary also the upper cover piece 14 to protect or immobilize the upper or lower edge of the sheet. This way you can essentially reduce the risk of detachment of a sheet decorative With a decorative sheet they can also be hidden welding cords in the longitudinal direction of cans. A tin wrap that is formed by folding and joining by welding, especially laser welding, can already get a shape special by cutting the composite pieces. Because the material of at least one flat metallic material formed for the wrap does not harden through molding stages, the wrap It can be molded at least by areas with contour modification. From this way aesthetically attractive cans can be formed that can Provide yourself with a shrinkable decorative sheet before, or if necessary, also after molding. This results in new possibilities. Of configuration.

Figure 6 shows a section of a can body 1 in which a dome-shaped vertical bottom part 1b is fixedly welded in the wrapping part 1a. Between a annular zone 15 and a circular line of the wrapper part 1a a welded joint 16 is formed which extends, for example, through the annular zone 15 to the wrapper piece 1a and is preferably produced by laser welding. In aerosol cans, the inside of the can must accommodate high pressure. A trigger-shaped reinforcement of the annular zone 15 prevents a detachment of the bottom piece 1b from the wrapper part 1a. In the case of an unacceptably high internal pressure, the bulge of the bottom piece 1b can be molded out and thus indicate overpressure, as well as prevent a blowout. The bottom cover 7 comprises a main area 7a surrounded by the contact area 7b which is preferably essentially flat and can especially accommodate the stamping of a bar code. In the embodiment shown, the contact zone 7b is fixed to a corresponding annular joint zone 3b 'at the lower end of the wrapping part 1a. For fixing, for example, a bond 8 may be provided by adhesion or sealing. If the material of the contact zone 7b comprises metal, then the joint can also be guaranteed by welding points 17, especially at least three welding points.
To be.

In the embodiment shown there is a decorative layer 4 in the form of a decorative sheet 4 'on the outer side of the can body 1. The decorative sheet 4 'contracts firmly before fixing the bottom cover 7 to the can body 1. The lower edge of the decorative sheet 4 'should not be trimmed exactly as it is covered by the bottom cover 7. It extends at least in part in the joining area 3b', but can also protrude approximately below the edge of the 1st piece of wrap. Therefore, in a seal joint between the contact zone 7b and the joint zone 3b 'the seal joint must be configured at least partially between the outer side of the decorative sheet 4' and the contact zone 7b. That is, the decorative sheet 4 'should adhere well enough to the joining area 3b'. In addition, approximately in the area 3b 'of sealing are present sealing layers on both sides of the decorative sheet that, due to the sealing process, guarantee a fixed joint. The transition of the wrapping part 1a or the can wall 2 to the bottom cover 7 is configured in longitudinal section in the form of a circular segment or retracted inwardly and preferably has a radius of curvature in the range of 1 to 6 mm, especially essentially 3 mm. This radio allows, in comparison with the songs, a free transport, also by small steps. If necessary, the bottom cover 7 forms a fixed surface in which a vertical can body 1 is only in contact by the bottom cover 7 with the surface of
support for.

Figure 7 shows an embodiment in which the bottom piece 1b is secured by a welding bead 16 in the form of an angled cord to the wrapper piece 1a. The bottom cover 7 is fixed with a connection by hook to the area lower side of the wrapper piece 1a. The 3b 'junction zone it is formed by the lower or free side area of part 1a of envelope. The contact area 7b of the bottom cover 7 is adjusts by dragging the area 3b 'of junction and forms preferably by spring lips 7f, so that the cover background 7 can be inserted with lip spring deformation 7f spring on the lower side of the can body 1. 4 'blade decorative extends between wrapper piece 1a and piece 1b in the background on the zone 3b 'of union and with it is fixed by the bottom cover 7 to can body 1.

Because you can give up a union sealed or welded, bottom cover 7 must neither be able to seal nor weld Therefore, to make the bottom cover can be used any plastic or also metals, especially metals coated or magnetic. The spring lips 7f can be configured in any way and are provided in a circular direction at less in three essentially equal points apart. Because the insertion of a hooked part without sealing device or welding can only be done by linear movement of a pressing piece, both the procedure and the device for fixing a hooked bottom cover is extraordinarily simple.

Figure 8 shows an embodiment in which the bottom piece 1b is joined by a crimped joint 18 with the 1st piece of wrap. The crimp connection 18 is configured preferably and molded into the can of such so that the transition of the wrapper part 1a or the wall 2 from can to bottom piece 1 is configured in section longitudinal in the form of a circular segment or is retracted towards inside and comprises a joining area 3b 'to fix the cover of bottom 7. To fix the bottom cover, between the joining area 3b ' and the contact zone 7b configures a sealed or welded joint. The crimp junction 18 is hidden by the bottom cover 7. Given the case, along the wrapping part 1a extends a 4 'decorative sheet to below the contact zone 7b.

Figure 9 shows an embodiment in which a can body 1 was designed by pressing, especially extrusion, such that the bottom 3 becomes the vertical can wall 2 upwards and into a wall section 2 ' vertical down. Directly after pressing, the can wall 2 forms a cylindrical wrap surface next to the wall section 2 'which can be printed, for example with a decorative layer 4. The wall section 2 'retracts in part so that the bottom cover can be fixed therein. In the embodiment shown, the decorative layer extends essentially to the bottom cover. That is, the entire visible area of the can body 1 with respect to the side has a decoration. If necessary, a sheet is also provided that extends to below the bottom cover. If the can body is formed of aluminum, then by means of the use of a bottom cover 7 with magnetizable metal a can body can already be provided that can be transported with conveyor belts
magnetic

Claims (16)

1. Can body (1) with a closed can wall (2) in the shape of a wrap that runs around a can axis and a bottom (3) configured on a front side of the can wall (2), in which at least in a partial area of the bottom (3) an outer bottom cover (7) is configured in the form of a flat material as well as fixed in an annular junction zone (3b, 3b ') of the can body ( 1), characterized in that a decorative layer (4) is configured on the outer side of the can wall (2) in the form of at least one colored layer, but preferably as a decorative sheet (4 '), and the decorative layer ( 4) extends at least to the outer edge of the bottom cover (7). 2. Can body according to claim 1, characterized in that the decorative layer (4) is partially overlapped by the bottom cover (7). 3. Can body according to claim 1 or 2, characterized in that at least one layer of the can wall (2) and the bottom (3) is formed of metal and the bottom cover (7) has a layer thickness of 0.08 to 0.8 mm, especially 0.2 to 0.6 mm. 4. Can body according to one of claims 1 to 3, characterized in that the can wall (2) and the bottom (3) are connected to each other by a cord, if necessary a beaded cord (18), but preferably a weld bead (16), especially a laser weld bead, and the bead is hidden by the bottom cover (7). 5. Can body according to one of claims 1 to 3, characterized in that a sealing joint (8) or a coupling connection (7f) is formed between the bottom cover (7) and the can body (1). A can body according to one of claims 1 to 5, characterized in that the transition from the can wall (2) to the bottom cover (7) in longitudinal section is preferably formed in the form of a circular segment and especially has a radius of curvature in the range of 1 to 6 mm, preferably essentially 3 mm. 7. Can body according to one of claims 1 to 6, characterized in that the bottom cover (7) forms a fixed surface in which a vertical can body (1) is only in contact with a support surface by the cover background (7). A can body according to one of claims 1 to 7, characterized in that the bottom cover (7) comprises a layer that confers stability, is configured in an essentially flat main area that is surrounded by the annular junction zone (3b, 3b ') and preferably comprises a printing zone, especially with a barcode. 9. Can body according to one of claims 1 to 8, characterized in that the bottom cover (7) comprises a tearing mechanism, preferably with a weakened tear line and a tongue. 10. Can body according to one of claims 1 to 9, characterized in that a hollow space is formed between the bottom cover (7) and the bottom (3). 11. Procedure for placing an outer bottom cover (7) on the bottom (3) of a can body (1) with a closed can wall (2) in the shape of a wrap that runs around a can axis and a bottom (3) configured on a front side of the can wall (2), in which at least one layer (5) of the can wall (2) and the bottom (3) is formed of metal and the cover of bottom (7) in the form of a flat material is fixed to an annular junction zone (3b, 3b ') of the can body (1), characterized in that a decorative layer (4) is configured on the outer side of the wall of can (2) in the form of at least one colored layer, but preferably as a decorative sheet (4 '), and the bottom cover (7) is fixed such that the decorative layer (4) extends at least to the outer edge of the bottom cover (7). 12. Method according to claim 11, characterized in that, before fixing the bottom cover (7), the can wall (2) and the bottom (3) are joined together by means of a cord, where appropriate a bevelled cord ( 18), but preferably a weld bead (16), especially a laser weld bead. 13. Method according to claim 11 or 12, characterized in that, before fixing the bottom cover (7), a decorative sheet (4 ') is arranged on the outer side of the can wall (2) and in the fixing of The bottom cover (7) hides an extreme area of the decorative sheet (4 ') by the bottom cover (7). 14. Device for placing an outer bottom cover (7) on the bottom (3) of a can body (1), comprising a closed can wall (2) in the form of a wrap that runs around a can axis and a bottom (3) configured on a front side of the can wall (2), with a clamping mechanism (11, 12) to hold the can body (1), characterized in that the clamping device (11, 12 ) keeps the bottom (3) of a can body (1) held free and a fixing mechanism makes the bottom cover (7) movable towards the bottom (3) and there it is fixed, in which a layer is configured decorative (4) on the outer side of the can wall (2) in the form of at least one colored layer, but preferably as a decorative sheet (4 '), and the bottom cover (7) is fixed in such a way that The decorative layer (4) extends at least to the outer edge of the bottom cover (7). 15. Device according to claim 14, characterized in that the fixing mechanism comprises an introduction mechanism (13) for introducing a bottom cover (7) towards the bottom (3) of a can body (1) held by the locking mechanism clamping and sealing mechanism (10) and / or a pressing device and / or welding device, especially a welding device
To be. 16. Device according to claim 14 or 15, characterized in that the retaining device (11, 12) comprises a centering mechanism (11) for housing the bottom (3) and a presser mechanism (12), wherein the mechanism Presser foot (12) in collaboration with the fixing mechanism causes a desired compressive force to be achieved between the bottom cover (7) and the annular joint zone (3b, 3b ') of the can body (1).