CN85104454A - Container - Google Patents

Abstract

A kind of packing container utilizes a kind of method buckle sealing-in of double-seam.The top cover of its diameter less than general case arranged on shell of tank, produced a radial space, thereby form an eck at the sidewall of this space container shell around top cover Ka Bi.Form a sealing-in contact surface but top cover at first is placed on the shell between the two, this contact surface is preserved in whole seam process all the time.Shell of tank and/or top cover can be made by plastics or metal or a kind of laminated material.In the aseptic packaging process, under disinfection, make contact surface produce an elementary sealing-in, under non-disinfection, finish seam again.

Description

Container

The invention relates to the double-seam container; Connect the method for envelope double-seam container and the method for sterilely certain packing of product being advanced a container.

In this application, a double-seam container has a shell, and it connects envelope by a top cover, and this top cover is buckled on this shell by a circumferential double-seam that is shaped by a kind of this method.The method that connects a front cover double-seam is meant a lid with a circumferential section is buckled in a method on the shell of tank, this circumferential section comprises a vertical Ka Bi, this Ka Bi converges mutually with a joint plate, this joint plate comprises a terminal top cover crimping, shell of tank has a sidewall, this sidewall finishes a circumferential part office, and this part comprises that one is converged the side wall ends part mutually with a seam flanging, and said method comprises the steps:

Place step for (1) one, it comprise with top cover be placed on hold body case above, wherein joint plate is covering with the seam flanging and contacts, thereby defines initial contact surface between the two, and

(2) seam steps, it comprises that the while applies an axle pressure to top cover and shell of tank, and apply total transverse seam power so that in two continuous seam operations, make joint plate and the distortion of seam flanging around joint plate, thus, the inside turnup upwards of top cover crimping in first procedure, and flanging overturns downwards, thus above-mentioned circumferential section just forms the internal lock relation, in second operation work, thereby circumferential section is pressed together and has constituted a circumferential double-seam.

For simplicity, the example explanation that above-mentioned definition is used in an open end of top seal of shell of tank will be understandable.Yet as everyone knows, the shell of container is can be so directed so that will open end closed not be vertically upward under many circumstances, and this situation is fully possible.Such as " up " or terms such as " down " is that direction according to reference will face upward or downward or the like and take, if the open end of shell of tank exactly at the top, but and do not mean that open end must be at the top.

The conventional way that forms a double-seam between a metal can and a crown cap (end face of can) need apply a bigger axial force in the process in seam, so that form the shell hoop length of a satisfaction in seam.This method makes that those are equipped with the container that fragile object is unable to undergo this pressure not utilizing double-seam to connect envelope at present, and for example those make plastic container by hot formed plastic container or some layer, or those cans of (pressing present standard) as thin as a wafer.This point make a variety of be suggested at present or developed packing container on so that those have more than conventional vessel and use a kind of double-seam to become unpractiaca thing on the container of remarkable advantage in other respects.

An object of the present invention is to provide a kind of method of double-seam, it can form a gratifying shell hoop of its length, and greatly reduces the xial feed that applies in the seam process.

Another object of the present invention is that a kind of production method that is applicable to shell of tank will be provided, this shell of tank or the layer prepared material of partly or entirely forming by plastics, or by metal as thin as a wafer, or be made of thermoforming layer system or non-layer system plastics, thereby the method that can utilize double-seam under above-mentioned each situation connects a metal or plastic closure (layer system or other forms) and is enclosed on the shell of tank.

A problem (the common metal can generally this problem can not take place) is that shell of tank has the danger that is penetrated by the sharp edges of wrinkle in double-seam, the sharp edges of this wrinkle may be to form on the crimping at top cover in the first procedure process, but is flattened once more in second operation work.Yet when canning material makes sidewall become very soft or is easy under the crooked situation, the decline of consequent antagonistic force often reduces the ability that wrinkle is driven plain; Therefore, if top cover is to make than the harder or more crash-resistant material of shell with a kind of, then wrinkle may penetrate sidewall.

Thus, another object of the present invention is at first to reduce the trend that this wrinkle forms.

So far, double-seam is used for aseptic packaging aspect also have some problems.The definition of aseptic packaging is such: at first sterile product is inserted the container through sterilization, utilized the lid through sterilization that seal of vessel is got up then under sterile condition.

If needed final container form is a kind ofly may carry out disinfection to container and lid so fully with double-seam end face osed top container, for example, carry out disinfection with superheated vapor or hot air or hydrogen peroxide vapor.The container that to insert through sterilization through the product of sterilization under no microbiological condition also is possible, for example, in the work box of the air of the sterilization that is full of steam or process product is inserted container.To be placed on through the lid of sterilization in identical no germ work box is possible too on the container.Yet, in this, container and unsealing.Have only the end face of working as under the situation on the container, just to be finished sealing at last by double-seam.

The seamer that is used for double-seam is well-known, but this seamer is difficult to a work box that can carry out disinfection, and this work box also can be to keep no germ state.About this point, former people's attempt is surrounded the critical area of seamer, and utilizes steam or hot air to make this zone keep high temperature.This practice can make seamer produce concrete problem mechanically, for example, and the problem that produces owing to the destruction of the het expansion of machine part or lubricating system.If one or two parts of finished container are to make (for example a kind of plastic material) by a kind of material of understanding deliquescing or dissolve under this high temperature, hot environment has equally also produced problem so.

Therefore, someone advise utilizing a kind of between container and lid temporary sealing (or " primary seal ") and container and lid still are in the method for sterilization fill area and overcome these problems, utilize this method, the osed top container is taken out from sterilising zone and under the environmental conditions in non-sterilization on the seamer of a routine, carry out double-seam subsequently.A kind of primary seal like this can produce, for example, if an end face with suitable profile line is placed on the flanging of the container of having filled, and end face since disinfecting steps also the heating, and if exert pressure so that sideline part sealing-in on the flanging of container.Yet, only in the double-seam process primary seal can ruined situation under this technical solution just effective.

In the double-seam operation process of routine, so a kind ofly seal the relative motion that in the process of double-seam, produces between can joint plate and go to pot owing to the seam flanging of shell of tank and top cover; Therefore damaged the nonpoisonous state of container.

When this seals when destroyed, because the decline of pressure in the container end portion space, germ tends to be inhaled in the end space of container.In addition, the lower surface of top cover (not in the scope of primary seal) will become non-disinfection when container takes out under disinfection.In the process of conventional double-seam, this surperficial part is pressed towards end space, and may pollute the inside face of container.

Therefore, further purpose of the present invention provides a kind of method of double joint, and the primary seal that wherein carries out before the seam step can be not destroyed in the seam step; A kind of method of double joint is provided, and wherein the bead portion of top cover (not in so a kind of scope of sealing) can not be pulled to the end space of container; And a kind of method of double joint is provided, and wherein the seamer part that can be used as a sterile packaging systems is used under a kind of not sterile environment.

According to a first aspect of the invention, a kind of in order to the method that connects a front cover double joint container (as defined above) in:

(1) before the seam step begins, the edge of a wing of top cover faceplate should be in so a kind of state: when being placed on top cover on the shell of tank in the placement step, faceplate does not contact with the container side wall that centers on it; And

(2) in first seam operation, the end sections of sidewall does not contact with faceplate, in second seam operation, the circumferential size of the end sections of sidewall reduces, thereby force this part to lean against on the faceplate, in whole seam process, joint plate is with not producing a bit relative motion at its contact point between the flanging.

Before the seam step began, the size of top cover crimping and seam flanging preferably arranges like this: the initial contact point between joint plate and flanging will be positioned partially in the top cover crimping at least, placed step and comprised top cover is snapped on the seam flanging.

The method according to this invention, the axial compressive force of effect can be significantly smaller than is enough to keep top cover and enclosure axis to the needed pressure that is bonded with each other.

The crimping of top cover is preferably in for the first time and carries out turnup in order to be pressed against on the end sections of sidewall in the seam process. Like this, thereby not only so that the crimping of top cover had horizontal support to reduce or eradicated wrinkling problem above-mentioned, thereby and the end sections that helps to make sidewall to internal strain help or even cause reducing of its circumferential size, thereby this situation takes place to form an eck at shell of tank in above-mentioned twice seam operation.

This shell can be plastics or metal or comprise at least a kind of layer of structure processed of one deck plastic material layer. Equally, top cover can be plastics or metal or comprise at least a kind of layer of structure processed of one deck plastic material layer.

According to some embodiment of this method and according to preferred embodiment, when the method during as a sterilization wrap operation a part of, placing step is to form a sealing on the initial contact-making surface that will be implemented between shell of tank and the top cover, do not relatively move owing between joint plate and flanging, can produce, so this sealing is retained in whole seam process down. One deck seal, sealing materials can be clipped between joint plate and the seam flanging in order to produce an above-mentioned sealing. About this point, according to the treating method of recommending, thereby should being in so a kind of temperature in placing step, shell of tank or top cover or among both one makes the deliquescing of seal, sealing materials layer, inside the seam flanging is enclosed in like this. Best bet is that this seal, sealing materials layer is bonded in the seam flanging on the joint plate in placing step. As a kind of selection, at least one in joint plate and the seam flanging, at least a portion of its thickness (comprising the respective surfaces that limits initial contact-making surface) is to be made by plastic material, in placing step initial contact-making surface is carried out local heat, thereby makes the plastics material Material deliquescing and joint plate and flanging sealed.

According to a second aspect of the invention, also provide a kind of certain product has been packed the method for advancing a container under germ-free condition, this container has one in advance through the shell of sterilization and the lid of a process sterilization in advance, this method comprise the steps: that product put into the shell of container and with the top cover sealing-in on container, all these is carrying out under the disinfection completely, wherein this method comprises the method that container is connect envelope according to first aspect of the invention described above, wherein placing step is to form one on the initial contact surface that will be implemented between shell of tank and the top cover to seal, owing between joint plate and flanging, do not relatively move according to not producing, so sealing, this in whole seam process, is retained down, placing step still is under the above-mentioned state at shell of tank and top cover and finishes, between top cover and shell, produced a ccasual sealed interface so at least, the container that fills up product takes out from above-mentioned state subsequently, after above-mentioned steps was finished, the seam step was not finished to form a permanent double-seam under the disinfection.

According to a third aspect of the present invention, also provide a double-seam container (as hereinbefore defined), wherein, top cover is that a method according to the present present invention is buckled on the shell of tank.

At least be under the metallo-situation at shell of tank, its sidewall preferably has and not only is suitable for the packaging applications of container but also can stands the light necessary minimum thickness of xial feed that is applied in the seam process.If shell of tank is a kind of multilayer (i.e. layer system) structure, this material layer can be that plastics or metal or both use with.If shell of tank is plastics, then can adopt the representative type heat forming technology.

Total says that top cover can be any material, as long as this material can be buckled in the form of double-seam on the shell of container, for example, can be with metal (having or not having a suitable seal plate or seal strip); Can be metal-plastic layer prepared material; Or plastics (can adopt the single or multiple lift structure).Top cover can adopt a kind of what is called " easily to open " type, promptly has a single-piece or subsidiary tin opener on the top cover of container.

The osed top container can be equipped with milk, dairy products or other Foods or drinkses, or certain is not the product that is used for human or animal's consumption.This product can be a liquid, solid or both have concurrently.

Referring now to the application's accompanying drawing, only way is by way of example described the present invention, wherein:

Fig. 1 is a generalized section, and the double-seam technological process of a kind of routine when one three parts metal can sealing is described;

Fig. 2 is a lateral plan about a kind of representative type container, and this container comprises a unsplit casing, leans on the method for double-seam with its body seal by a lid;

Fig. 3 to Fig. 6 is the part sectional view that amplifies greatly, and four steps of carrying out on a metal can in the conventional double-seam process are described;

Fig. 7 has illustrated contingent wrinkling in the double-seam process of routine;

Fig. 8 to Figure 11 is similar with Fig. 3-Fig. 6 respectively, but identical four steps of its explanation a method according to the present present invention in the forming process of a double-seam;

Figure 12 explanation a kind of improvement within the scope of the invention;

Figure 13 is a scheme drawing, represents a front baling line, and this baling line is that a method according to the present present invention is carried out.

Comprise a columnar shell and top cover or can end face 4 at the can shown in Fig. 12.This shell comprises an outer thimble 6 and can bottom surface 8, and this bottom surface is buckled on the outer thimble by a circumferential double-seam 10.The work that can top cover 4 is buckled on the can shell is finished by the seamer of a routine, and this machine comprises the instrument of following form: one promotes 12, one chucks of pedestal, 14, one first work seam roller 16 and one second work seam roller 18.Can see fully aware ofly that from Fig. 3 the can top cover comprises a circumferential section 20, this part comprises a card wall 22, and vertically around the spider part 24 of top cover, top cover also comprises a joint plate 26 to this Ka Bi.This joint plate 26 has a top section 28, and card wall 22 converges on a circular arc portion 30 mutually with this part, and joint plate 26 also has a terminal top cover crimping 32.Outer thimble 6 has constituted a sidewall, and this sidewall finishes at circumferential section 34 places, and this part comprises the cylindrical ends part 36 of a sidewall, and these end sections 36 same bandy seam flangings 40 converge mutually at circular arc portion 38 places.

Seam process in the routine shown in Fig. 3 to Fig. 6 comprises the steps:

(1) place step:

Wherein can body (has filled up certain product in the body, not shown) be placed on the lifting pedestal 12, top cover 4 be positioned at can body above, the top section 26 of its joint plate and seam flanging 40 are to cover and contact, thereby define an initial contact surface (this face is represented with 42) between the two.

(2) seam step:

The diameter of card wall 22 should be leakproof fit (as shown in Figure 3) in side wall ends part 36, and the diameter of the terminal edge 44 of top cover crimping will be much larger than the diameter of seam hemmed edges 46. Seam roller 16 and 18 is made into respectively has circumferential seam groove 48 and 50.

The seam step comprises one first operation and one second operation, and above-mentioned operation is finished by seam roller 16 and 18 respectively.In whole seam process, can 2 is rotated according to its axle by the effect of chuck 14 and lifting pedestal 12, and applies a higher axle pressure P(as shown in Figure 1 by this chuck and the can that promotes pedestal).This pressure not only is enough to top cover is leaned against on the can body firmly, but also itself provides one to have one axially to the power of component for the seam process; This point will be described below.The seam roller constantly applies the total transverse seam power (should refer to radially in this example) around joint plate 26.So that make joint plate 26 and flanging 40 enantiotropy mutually simultaneously.

Fig. 3 and Fig. 4 illustrated the beginning of first operation respectively and finished, wherein crimping 32 towards the radial axis of can move inward.Top cover crimping 32 inside upwards turnups under the effect of seam roller 16, its shape of cross section as shown in Figure 4.With because of simultaneously, flanging 40 downward turnups, and extend (Fig. 1) by means of axle pressure P are so that flanging 40 is positioned at crimping 32.Like this, peripheral part 20 and 34 of top cover and can sidewall just forms the internal lock relation, in first procedure, can have slide relative between joint plate 26 and flanging 40.This point is by being marked as B and B among Fig. 3 ₁Contact illustrate that after first procedure was finished, this contact point separated (as shown in Figure 4), like this, initial contact surface 42(and any primary seal that under cas fortuit, in placing step, on contact surface, may set up) destroyed.The specifically discussion of carrying out with reference to this paper front; if promptly be the situation that is applied in aseptic packaging; about the shortcoming of this conventional double-seam operation just can be found out by comparison diagram 1 and Fig. 4; the lower surface 33(of top cover is not in the scope of contact surface 42) will not sterilize if under disinfection not, carry out the situation of seam; and; the distortion of the circumferential section 20 of top cover this situation can occur usually, i.e. the part on surface 33 meeting quilt is to the head room 57 of pulling back to container.Since after first procedure is finished (Fig. 4) on contact surface 42, do not seal-both just before seam begins, really have one to seal but because the pulling back also to have and produce a danger that causes the not disinfecting surface of container internal contamination of surface 33.

People also will notice, when first procedure finished, joint plate had been out of shape so that consistent with the profile of seam groove 48, and axle pressure P has deepened card wall 22.Because cylindrical wall end sections 36 is upwardly extending, the circular arc portion 38 that is adjacent is reduced.In this operation, two contact point A and A ₁(Fig. 3) form axial separation.Should also be noted that at last because cylindrical wall end sections 36 and Ka Bi closely are bonded together mutually, therefore be radial separation by the first procedure top cover crimping 32 and cylindrical wall end sections 36.

After first procedure was finished, seam roller 16 was withdrawn from and seam roller 18 is embedded (as shown in Figure 5), the beginning of this second step of explanation operation.Fig. 6 has illustrated finishing of second operation work, wherein seam roller 18 also wants retainer shaft to pressure P towards the axial-movement of can simultaneously, thereby has further prolonged flanging 40 and circumferential part 20 and 34 is together pushed the final form that becomes circumference double-seam 52 shown in Figure 6.Now, seam 52 comprises a shell hoop 54, and it and a top cover hoop 56 are sealed connection, and the latter has one with roller groove 50 corresponding to exterior contours.

At an A and A ₁And some B and B ₁Between be separated in the second operation work process and can further strengthen.The axial length L of the last or inner radial part of shell hoop 54 _BBe an important factor aspect the integraty of determining double-seam.As from above cognoscible, this length L _BWith the size of axle pressure P direct relation is arranged.In fact just because of this reason, have to adopt very big pressure.

In above-mentioned common process, carry out (Fig. 3 and Fig. 4) in the process in the first road seam operation, top cover edge 44 and crimping 32 are not support, because its diameter is constantly reducing, so tend to form wrinkle, the representative type situation is shown in 64 among Fig. 7.In the second road seam operation, when constituting 5 layer material force togethers of final double-seam, these wrinkles can be driven plain usually.

Fig. 2 has represented the shell of tank 58 of a side, and this shell can be metallo-or a kind of suitable plastic materials.Can end or top cover 60 are that the mode with double-seam 62 is buckled on the open end of shell of tank 58.If shell 58 and bottom 60 all are metallo-s, then seam 62 can be shaped with above-mentioned usual manner.

Referring now to Fig. 8 to 11, these figure illustrate a kind of method that is used to connect a front cover double-seam container, and this container has a shell 70 made from plastic material.Have a cylinder side wall 72, it has this part of circumferential part 134(identical with can housing parts 34 among Fig. 3 substantially), it is characterized in that an end sections 136, circular arc portion 138 and seam flanging 140.This container has a top cover 74, in this example, this top cover can take with Fig. 1 and Fig. 6 in the practically identical shape of cross section of top cover 4; This top cover has a center plate 124 and a circumferential part 120, it comprises a card wall 122 and a joint plate 126, this joint plate comprises a top part 128 and a top cover crimping 132, and joint plate is connected with card wall 122 by a circular arc portion 130.

In first road and second operation work, seam roller 116 with 118 and corresponding separately seam groove 148 be identical with seam roller 16 and 18 generally with 150, difference is that each seam roller groove lower part 78 has lower axial height to avoid can influencing the sidewall (being appreciated that this point from Fig. 9 and Figure 11) of can when each road seam operation is finished.

Under the situation of a given side wall of outer shell size, the size of the top cover among Fig. 8 is less than the size (if use the common process shown in Fig. 3 to Fig. 6 then use this top cover) of top cover 4.Like this, the circumferential size of card wall 122 has following feature, and when top cover being placed on the shell of tank (as shown in Figure 8), Ka Bi does not contact with side wall of outer shell 72 around it.Top cover 74 is not to be placed on the shell by influencing each other between Ka Bi and the side wall of outer shell, but be placed on the shell by intussusception with shell flanging 140, here the edge 146 that has also comprised top cover, flanging 140 relies on mutually with the bottom side of joint plate 126 on an initial contact surface 142, this contact surface is not forming between two plates along the middle part of top part (28 among Fig. 3) like that shown in the image pattern 3, but forms at the root of top cover crimping 132.Two contact points on the contact surface 142 on joint plate 126 and the flanging 140 in Fig. 8 respectively with G and G ₁Expression.

Similar with the method for routine, method shown in Fig. 8 to 11 comprises that one is placed step and seam step afterwards, placing step comprises top cover 74 is positioned in the shell of tank 70 of having filled, this shell of tank is placed on and promotes on the pedestal, then, chuck (114) is contained in the card wall 122 so that be pressed on the center plate 124.This seam step also comprises 2 continuous seam operations, chuck and lifting pedestal provide axle pressure, each parts of container constantly are rotated according to its coaxial line, thereby seam roller 116 and 118 is realized their first and second procedures separately towards the axial-movement of container.

Yet because the size of top cover 74 reduces, the diameter of flanging 140 is a bit larger tham the diameter at the edge 144 of top cover crimping, and like this, the edge 144 of flanging just is in the crimping 132.Owing to this reason, in placing step top cover be snap-on or be pressed on the shell of tank with spring, this point can be out of shape by the natural elasticity of folding wall 140 and be accomplished.

The relative position of each parts is respectively as Fig. 8 and shown in Figure 9 in the beginning of the first seam operation and when finishing, and Figure 10 and Figure 11 situation the when beginning of second operation work and end are described.In the process that first procedure and second operation work are carried out, thereby the outward flange of crimping 132 144 is inwardly pressed downwards to be pressed on the end sections 136 of side wall of outer shell, just thereby make this part be marked as 76 eck like this in internal strain has finally formed as Figure 11.

Because reducing of the diameter of shell of tank end sections 136 can produce a long shell hoop 154 under not by means of the situation of the axle pressure that applies.Therefore, axle pressure P(Fig. 1 from the numerical value) do not need to keep top cover and the shell needed pressure that mutually combines in the axial direction a lot of greatly than being enough to.Like this, just can produce the desirable seam (comprising shell hoop 154 and top cover hoop 156) that is shaped, and the danger that causes shell to be crushed owing to continuous base pressure can not take place.

Here referring again to Fig. 7 with relevant with it above.When shell of tank be when making with a kind of material softer than metal (for example, plastics in this example), perhaps under the situation of needs with a kind of very thin metal the time, and this moment, top cover was with metal, a kind of like this trend can appear so, that is: in the second road seam operation process, wrinkle 64 can be cut and wear the side wall of outer shell material, so just penetrates side wall of outer shell on the L point of the edge of close top cover hoop 56 in Fig. 6.And caused the danger of leaking.Utilize the method shown in Fig. 8 to 11, can reduce or avoid this unacceptable result, crimping 132 is to be supported on the side wall of outer shell (to represent with the M point in Fig. 9) owing to (often form wrinkle in this stage) in first procedure for this.This being supported in the whole second operation work continues.

We will be noted that the end sections 136 of (Fig. 9) sidewall does not contact with card wall 122 all the time in the whole first procedure process, but owing to finishing of eck 76 it is pressed on the Ka Bi in second operation work.

Another crucial effect is to have remained initial contact surface 142 in whole seam process, between joint plate 126 and flanging 140, in fact do not exist to relatively move, like this, contact point G and G among Fig. 8 ₁In the double-seam of finishing (in Figure 11, representing), keep in touch with 152.This effect can be used for aseptic packing system, system as shown in figure 13.

With reference to Figure 13, this is one, and it comprises that is in an outer cover 84 under the disinfection about fill the aseptic packaging line of certain Foods or drinks 82 in containers of plastic material shell or container tank 80, and its mode is known.The belt conveyor 86 of any suitable type runs through whole outer cover 84, in order to the transmission container jar.In outer cover, there are sterilization 88, one filler platforms 90 of platform and a dress to cover platform 92.Each container tank utilizes hydrogen peroxide to carry out disinfection with the method for routine on sterilization platform 88, inserts product 82 afterwards on filler platform 90, and its method also is conventional.Cover on the platform 92 at dress, crown cap 94 is carried by the decline volute road drawing-in device of a known type, and crown cap passes through a hot-air furnace 96, in this hot-air furnace crown cap is carried out disinfection and heats.

Then, utilize a suitable apparatus for placing (not shown) that is positioned at below the stove 96 the thermometal lid to be placed on the appearance jar 80 of filler, so just, constituted the placement step of a double-seam method, and be included in each crown cap and with container tank that it connects mutually between mating surfaces 142(Fig. 8) go up and form a primary seal.At this moment, container tank is transferred to the outside of sterilization outer cover, delivers on the double-seam machine 98 of a routine, this seamer is in not disinfection, finished by seamer 98 by the seam step, its mode has given description with reference to Fig. 8 to 11, thereby has formed a permanent seam.

Cover on the platform 92 to utilize at dress and top cover is placed on formed seal can be saved in finishing of double-seam at least on the container tank, this is owing to not having relative motion and mating surfaces to be in pressured state all the time in contact surface between each parts.Being expressed as the sterilization clearance envelope groove 104 that 102 top cover crimping is not drawn in the primary seal district and between card wall 122 and side wall ends part 136 in Fig. 8 constantly eliminates the sterilization inner face that forms containers and can not decrease brokenly primary seal.

In order to reach sealing, on the contact surface between sealing-in flanging 140 and the sealing-in plate 126, should have adhesive ability.Container tank can be certain plastic material, has caused the patterned heat on the contact surface 142 like this when contacting with hot top cover, thereby makes the surperficial deliquescing of flanging 140 and make it attached on the top cover.Yet the downside at the joint plate 126 of top cover preferably has suitable backing plate of a packing seal or one deck or seal, sealing materials 100(as shown in figure 12).The sealing pad softens in heating furnace 96 so that form a seal that firmly joins with flanging 140.Utilize a kind of suitable feasible economically sealing bedding and padding material, just can obtain a kind of firm bondingly, for example, cover on the platform at dress a crown cap is pressed on the polypropylene containers jar.

Shell of tank and top cover can be that any material can be finished smoothly to cause above-mentioned double-seam method, will reach the desired integraty of any purpose thereby the seam that produces has container.Non-limitative example comprises: same above-mentioned steel of steel or pig head shell or pig crown lid (this top cover can be from open form or " easily opening " type); Same above-mentioned steel of a containers of plastic material shell (as polypropylene, polycarbonate, polyethylene or polyvinylchloride) or pig end surface; The top cover that above-mentioned metal or the some materials of the same usefulness of plastic container shell are made; And the shell made of some kinds of materials of a usefulness, it has a top cover of being made by some kinds of materials or above-mentioned metal or plastics.A shell or a top cover of being made by some kinds of materials can be (for example) layer system structure, or comprises the assembly (for example, a can end face has a metal plate sections and plastics shedding motion) of some different materials.This layer system structure typically comprises 1 layer or laminated plastics material, and it can have or not have a thin metal layer.

The top cover that plastics or layer system shell maybe will utilize said method to carry out seam can be finished with thermal deformation or any other method that is fit to.Above-mentioned seam method is applicable to have the metal can shell of sidewall as thin as a wafer too.

Claims (26)

1, the method for a double-seam container of a kind of sealing-in (as hereinbefore defined), wherein:

(1) before the seam step is carried out, the length of enclosing of the Ka Bi of top cover has such feature: when top cover was placed on the shell of tank in the placement step, this Ka Bi did not contact with the side wall of outer shell that centers on it;

(2) in the first road seam operation, the end sections of shell of tank sidewall does not contact with Ka Bi, in the second road seam operation, thereby the length of enclosing of this side wall ends part reduces to force it to be pressed on the Ka Bi, can not produce actual relatively moving on the contact surface in whole seam process between joint plate and the flanging.

2, a kind of method according to claim 1, wherein before the seam step, the size of top cover crimping and seam flanging has such feature: the initial contact layer between joint plate and flanging is positioned at crimping at least in part, places step and comprises top cover is snapped on the seam flanging.

3, a kind of method according to claim 1 or claim 2, wherein the axle pressure that in the seam process, applies be enough to keep between top cover and the shell interconnect axially that required pressure is compared and little a lot.

4, a kind of require according to aforesaid right in any one method, wherein, in the first road seam operation, with the crimping turnup of top cover so that be pressed on the side wall ends part.

5, a kind of according to any one method in the aforesaid right requirement, wherein shell of tank is made with a kind of plastic material.

6, a kind of according to any one method in the aforesaid right requirement 1 to 4, wherein shell of tank is to make with a kind of layer of system structure, and this structure comprises one deck plastic material layer at least.

7, a kind of according to any one method in the aforesaid right requirement 1 to 4, wherein shell of tank is with metal.

8, a kind of according to any one method in the aforesaid right requirement, wherein top cover is made with a kind of plastic material.

9, a kind of according to any one method in the aforesaid right requirement 1 to 7, wherein top cover is made with a layer system structure, and this structure comprises one deck plastic material layer at least.

10, a kind of according to any one method in the aforesaid right requirement 1 to 7, wherein above-mentioned top cover is with metal.

11, a kind of according to any one method in the aforesaid right requirement, wherein, placing finishing of step is will produce one on the initial contact surface on shell and top to seal, owing to there be not actual relatively moving between joint plate and flanging, so this seals and remains in whole seam process down.

12, a kind of method according to claim 11 wherein is placed on a seal, sealing materials between joint plate and the seam flanging so that form above-mentioned sealing.

13, a kind of method according to claim 12, wherein shell or top cover or among both one are in a kind of like this temperature in placing step: thus the seal, sealing materials layer is heated above deliquescing seam flanging is sealed in.

14, a kind of method according to claim 12 or claim 13, wherein the seal, sealing materials layer sticks to the seam flanging on the joint plate in placing step.

15, a kind of method according to claim 11, at least one in joint plate and the seam flanging wherein, its at least segment thickness (comprising each surface that limits initial contact surface) make with plastic material, initial contact surface is locally heated in put procedure, thereby plastic material is softening and joint plate and flanging be bonded together.

16, a kind of method of certain packing of product being advanced a container at disinfection, this container has shell and top cover of sterilizing in advance of a sterilization in advance, this method comprises puts into shell of tank with product and with the step of top seal container, above-mentioned two steps are all carried out under disinfection, wherein this method comprises that utilization carries out sealing-in according to the method in any one in the claim 11 to 15 with container, still be in when shell and top cover under the situation of above-mentioned state and finish the placement step, thereby between top cover and shell, produce at least one primary seal, the container that to fill takes out from above-mentioned state afterwards, finishes the seam step then under non-disinfection so that form a nonvolatil double-seam.

17, the method for a double-seam container of a kind of sealing-in (as hereinbefore defined), this method come down to describe and finish as it is illustrated with reference to illustrations 8 to 11.

18, a kind of method according to claim 12, this method come down to further describe and finish as it is illustrated with reference to illustrations 12.

19, a kind of double-seam container (as hereinbefore defined), wherein top cover is to be buckled on the shell of tank according to any method in the aforesaid right requirement.

20, a kind of container according to claim 19, wherein shell of tank is made of plastic.

21, a kind of container according to claim 19, wherein, the shell of container is made with layer system structure, and this layer system structure comprises one deck plastic material layer at least.

22, a kind of container according to claim 19, wherein, this shell of tank is intact with metallic material system.

23, a kind of according to any one described container in the claim 20 to 22, wherein, top cover is made with plastic material at least basically.

24, a kind of according to any one described container in the claim 20 to 22, wherein, top cover is made with layer system structure, and this layer system structure comprises one deck plastic material layer at least.

25, a kind of according to any one described container in the claim 20 to 22, wherein, top cover is made with plastic material at least basically.

26, a kind of according to any one described container in the claim 23 to 25, wherein, above-mentioned double-seam comprises a top cover hoop and a shell hoop, and the circumferential side surface of this shell hoop has a kind of sealing-in or adhesives, and it places between the inside face of this surface with coupled top cover hoop.

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