CN104024116A

CN104024116A - Can end

Info

Publication number: CN104024116A
Application number: CN201280063019.XA
Authority: CN
Inventors: P·R·邓伍迪
Original assignee: Crown Cork and Seal Technologies Corp
Current assignee: Crown Packaging Technology Inc
Priority date: 2011-10-21
Filing date: 2012-10-19
Publication date: 2014-09-03
Anticipated expiration: 2032-10-19
Also published as: RU2014120462A; WO2013057250A1; JP2014530794A; CO6990689A2; MX2014004613A; SG11201401468TA; TN2014000168A1; US20140252011A1; AU2012324816B2; BR112014009525A2; WO2013057250A8; CN104024116B; AU2012324816A1; PL2768741T3; EP2768741A1; ZA201403279B; GB201118284D0; EP2768741B1; CA2852608A1

Abstract

There is disclosed herein a can end (10) for a can for pressurized contents, the can end being configured to be joined by a peripheral annular joining portion (24,26) to one axial end of a can body of the can and having an outer side arranged to face outwardly from the can and an inner side arranged to face inwardly into the can, the can end comprising: a central panel (18); a panel wall (20) annularly surrounding the central panel and extending axially inwardly and radially outwardly from the central panel; an annular chuck wall structure (12, 14, 50) extending radially- and axially-inwardly from the joining portion;; and an annular bead (16) which is connected between a radially outer edge (38) of the panel wall and a radially inner edge (50e) of the chuck wall structure and which is concave with respect to the outer side of the can end and extends at least partially radially outwardly with respect to the radially inner edge of the chuck wall structure, wherein wall portions adjacent inner and outer ends of the concave annular bead (16) form a bead mouth (m) that is open towards the outer side of the can end.

Description

Can end

Technical field

The present invention relates to mental package and relate more particularly to light weight tank end, for the method and apparatus of described can end manufacture and there is the tank of described can end.The present invention has especially about the beverage can for soda and the can end that provides for this reason.

Background technology

There is commercial the catching on of lightweight beverage can end of inclination dog wall.The such end of the first is announced and sells with trademark SUPEREND in patent publication us WO96/37414.This can end comprises peripheral cover hook, depend on the dog wall of described lid hook inside, extend radially inwardly from dog wall recessed reinforcement crimping and by the center panel of interior support of strengthening crimping, it is characterized in that dog wall with respect to and the axis of center panel external vertical with the angle inclination between 20 degree and 60 degree.Patent publication us WO96/37414 shows annular traditional between dog wall and that center panel and strengthens crimping.

Than can end more early, as the SUPEREND lid of announcing in patent publication us WO96/37414 at least in part to the intensity improved and the ratio of metal volume are provided, this is because the angle of dog wall allows center panel to have the diameter less than more Zao can end, thus when can end seaming to tank and described in while pressurization can end via the lower power of reinforcement crimping transmission to dog wall.And the angle of dog wall is suitable for the power producing by pressurization to be passed to and almost to there is no the seaming of distortion portion.

But, in the time that this can end is subject to excessive or concentrated pressure (if causing such as the impact that can be dropped by tank), dog wall will turn up, and forms and is known as the most advanced and sophisticated fold of " spike (peak) ", and wherein metal is easy to break and makes the content leaks of tank.Such inefficacy is known as " spike leakage ".

Each of patent publication us WO2006/050465 and US20100044383 is transferred to current cessionary, has described the controlling feature that prevents from forming this spike.But, the advantage of such controlling feature due to the overall minimizing of pressure by partial offset, with can end described in described pressure by permanent deformation.

The technological advance of SUPEREND can end caused such as at U.S. Patent number 7,819, and the emulative can end of describing in 725 and 6,702,142 is improved.Each of these can end has reinforcement crimping, the sidewall that described reinforcement crimping has rounded bottom and vertically or outwards opens.

The can end of patent publication us WO96/37414 forms traditionally in single pressing operation.Described formation completes simply by moving axially several concentric tool, some of described concentric tool by piston or spring load.Subsequently, conventionally complete other curling, line, embossing, lettering and draw ring accessory operation.

Patent publication us WO2005/113351 has announced a kind of can end, and described can end comprises dog wall and the transition wall of center panel, circumference, and wherein said transition wall comprises folded part.Describe several method and can manufacture thus such folding part, comprise the second formation operation or extrusion operation as shown in Figure 49 to 52 of patent publication us WO2005/113351 or Figure 53 to 57, wherein metal subsides in the mode of uncontrolled " being freely formed ".The can end of announcing in patent publication us WO2005/113351 does not obtain coml success.

In particular, generally speaking, the can end of patent publication us WO2005/113351 need to by make the lap of folding part be pressed into along they towards Surface Contact form the folding part of tight pressurized.Not only likely the folding part of so tight extruding will cause damage to the integraty of any coating on can end metal, and form the required machine in described folding part and compare and conventionally utilize that existing reformation compacting is getable must have significantly higher capacity, this means that the can end of patent publication us WO2005/113351 cannot be used existing originating firm to make in practice.

Another example of patent publication us WO2005/113351 is shown in Figure 11.Although the circular folding portion in this example is not flattened completely, will be appreciated that folding part still provides a neck, the relative sidepiece in folding part spreads all over described neck contact.The inside of the closed loop meanwhile, forming in folding part 54 in the sidepiece contact position of folding part axially inwardly and radially inwardly in described neck.Additionally, will be appreciated that producing the required multiple formation operations of this can end will cause the infringement to coating on metal surface and in metal surface, produce excessive stress.

High strength, lightweight and elimination spike leakage phenomenon have become the long range objective of can end engineering.

Refer to when tank can end resistibility to the outside deflection of center panel during by inner pressurized about the intensity of can end.Any opening draw ring that center panel forms in addition on panel outer surface is conventionally with respect to the outer peripheral plane depression of the seaming portion that can end is bonded to tank.Along with tank inner side increases (wherein tank have compare the internal pressure that external pressure is higher) with the pressure reduction between outside, can or change due to process operation the environmental aspect that tank stands and occur, center panel is tended to protuberance and is outwards expanded.This is any opening draw ring that tends to outwards promote center panel and be located thereon with respect to seaming portion, and can cause opening draw ring to expose the plane of seaming portion.Under this situation, opening draw ring is easy to cause obstruction, and described obstruction can be disturbed other processing and packaging, and can cause that tank opens unintentionally.Therefore relevant target is to alleviate this problem.

Summary of the invention

According to a first aspect of the invention, a kind of can end is provided, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises: center panel; Panel wall, described panel wall axially inwardly and is radially outwardly extended around described center panel and from described center panel circlewise; Annular dog wall construction, described dog wall construction radially inwardly and axially upcountry extends from described bound fraction; And annular flange, described annular flange is connected between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction, and described annular flange is recessed with respect to the outside of can end and extends radially outwardly at least in part with respect to the radially inward edge of described dog wall construction, wherein, the wall part adjacent with outer end with the inner of hollow toroid crimping formed crimping mouth, and described crimping mouth is opened towards the outside of can end.

Described crimping mouth can be the point of the wall part close approximation adjacent with outer end with the inner of hollow toroid crimping.

In one embodiment, described annular flange presents following section profile, and described section profile is through connecing as circle in substantially in the plane of central axis can end, that comprise can end.In this case, described annular flange is along opening to described outside to inside and axial outside direction from the interior diameter connecing.

In the embodiment aspect first, through in the plane of central axis can end, that comprise can end, the adjacent wall part that forms described crimping mouth is parallel or towards the outside of can end from the inner and the outer end fork of annular flange.

According to a second aspect of the invention, a kind of can end is provided, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises: center panel, panel wall, described panel wall axially inwardly and is radially outwardly extended around described center panel and from described center panel circlewise, annular dog wall construction, described dog wall construction radially inwardly and axially upcountry extends from described bound fraction, and annular flange, described annular flange is connected between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction, and described annular flange is recessed with respect to the outside of can end and extends radially outwardly at least in part with respect to the radially inward edge of described dog wall construction, wherein, described annular flange presents following section profile, described section profile is through can end, in comprising in the plane of central axis of can end substantially, connect as circle, and wherein, the wall part adjacent with outer end with the inner of annular flange formed crimping mouth, described crimping mouth about the interior circular shaft connecing to outwards and radially inwardly installing.

Described crimping mouth can be the point of the close approximation of the adjacent wall part at the center of close described inscribed circle.

Aspect first and in the embodiment of second aspect, described panel wall can be protruding in bending with respect to can end outside, wherein said dog wall construction comprises annular dog wall, described annular dog wall radially inwardly and axially upcountry extends, and the radial inner end of annular dog wall is connected with annular flange via following part, this part is with respect to protruding in bending and do not touch the outer surface of described panel wall outside can end, and wherein said can end is configured to, in the time that described can end is bonded to interior pressure in tank body and tank and increases to cause that can end outwards expands, protrudingly will dock to bending part with the protruding of radial inner end at annular dog wall to bending panel wall.

Described annular flange can present following section profile, described section profile is through can end, comprise in the plane of central axis of can end and there is bead wall, described bead wall is recessed continuously substantially to be spent through more than 180 to bending, and described recessed bead wall can stop with the angle that is no less than 45 degree with respect to the central axis of can end in its outer end, described angle is measured as follows in this section, the directional survey of advancing to dog wall from center panel from the central axis of direction outwardly along bead wall is to the tangent line in recessed curve radial outer end of panel wall.

In this case, described panel wall can incorporate the recessed curve of annular flange at its radially outward edge place, and wherein, through in the described plane of can end, can end wall between convex surface wooden partition and hollow toroid crimping, the tangent line at point of transition place is measured in described plane along radially outer direction becomes to be no more than the angle of 150 degree with outer axial direction.

In an embodiment of the present invention, described panel wall can be protruding in bending with respect to the outside of can end, and incorporate the recessed curve of annular flange at the radially outward edge place of panel wall, described recessed curve has maintained the curvature through the constant of more than 180 degree, and wherein, through in the plane of central axis can end, that comprise can end, can end wall between convex surface wooden partition and hollow toroid crimping, the tangent line at point of transition place is measured in described plane along radially outer direction becomes to be no more than the angle of 150 degree with outer axial direction.

In these and other embodiment, described annular flange substantially continuous bend is spent through more than 225.The tangent line at described point of transition of can end wall can be no more than 135 degree with the described angle that axially outward direction becomes.

According to a third aspect of the present invention, a kind of can end is provided, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises: center panel, panel wall, described panel wall axially inwardly and is radially outwardly extended around described center panel and from described center panel circlewise, annular dog wall construction, described dog wall construction radially inwardly and axially upcountry extends from described bound fraction, and annular flange, described annular flange is connected between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction, and described annular flange is recessed with respect to the outside of can end and extends radially outwardly at least in part with respect to the radially inward edge of described dog wall construction, wherein, described panel wall and described annular flange are by reforming and be integrally formed blank, press central interior panel instrument by described blank, described central interior panel instrument has the surface axially inwardly and radially outward tilting of extending from central panel zone, and described central interior panel instrument is provided with bending annular recess toward the outer side at the radially outward edge of its periphery, the annular recess of described bending forms described annular flange thus.

According to a fourth aspect of the present invention, a kind of can end is provided, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises: center panel; Panel wall, described panel wall axially inwardly and is radially outwardly extended around described center panel and from described center panel circlewise; Annular dog wall construction, described dog wall construction radially inwardly and axially upcountry extends from described bound fraction; And annular flange, described annular flange is connected between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction, and described annular flange is recessed with respect to the outside of can end and extends radially outwardly at least in part with respect to the radially inward edge of described dog wall construction, wherein, the material of can end is not folded or contact with himself between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction.

According to any can end of above aspect and embodiment, also can be included in the lid, label, mark, draw ring or other material that in annular flange, arrange.

According to a fifth aspect of the present invention, a kind of manufacture method of can end is provided, described method comprises: in the following manner blank is reformed, the axially extended annular section around described blank center panel region of blank material is compressed, at least inner radial flow of described annular section is become and take substantially the shape at the annular recess arranging with that side of the initial axially extended opposite direction of described annular section vertically of center panel; And also comprise and utilize at least center panel region of described blank under tension force under axial compression, described blank to be reformed.

In the embodiment of the method, blank is reformed and comprised against annular section described in the axial compression of ring tool surface, described ring tool surface extends radially outwardly from described center panel region and is upwards bent away from and ends at the hollow toroid recess of the back of the body towards described annular section primitive axis to bearing of trend from the initial axially extended axis of orientation of annular section of described blank, with at least radially penetralia that makes described annular section around ring tool surface the radially outward edge rolling radially outwardly from central panel zone, thereby take substantially the shape on described ring tool surface.

Described annular recess can comprise annular recess at its radially outward edge place, and described annular recess axially outwardly and be configured to promote to form axially the outwards recessed and bead portion that extends radially outwardly.

The embodiment of described method comprises described in axial compression that blank is to make at least inner radial flow of described annular section become and roughly take the shape of described annular recess, above-mentioned behavior is to having introduced the inside curve of initial radial in the remainder of annular section, and the remainder of described annular section otherwise axially extends to most peripheral part blank, that be kept to contribute to described axial compression from the radially outward edge of annular recess.

At this, blank is reformed and can be comprised that blank described in further axial compression is to make the inside further radially inwardly distortion of curve of initial radial in the remainder of described annular section.

In addition, further described in axial compression, blank can comprise by the axial outside of the remainder of annular section described in outer dog wall tool support, thereby radially the axial outer end of aduncate remainder is formed as at least a portion of the dog wall of can end at least in part by described further axial compression.

In the embodiment of described method, all reformations and further reforming complete by the single action of the annular section of axial compression and the described blank of reforming little by little.

According to a sixth aspect of the invention, a kind of manufacture method of can end is provided, described method comprises: in the following manner blank is reformed, the axially extended annular section around described blank center panel region of blank material is compressed against ring tool surface, described ring tool surface extends radially outwardly from described center panel region and is axially bent away from the initial axially extended direction of annular section of described blank and ends in the hollow toroid recess of the back of the body towards described annular section primitive axis to bearing of trend, with at least radially penetralia that makes described annular section around ring tool surface the radially outward edge rolling radially outwardly from central panel zone, thereby take substantially the shape on described ring tool surface.

The embodiment of the 5th or the 6th aspect can further comprise blank described in axial drawing, described drawing is carried out in the following way, the i.e. most peripheral part along blank described in axial outward direction drawing with respect to described blank center panel region, to be drawn into the intermediate annular part of described blank to make it radially outward and axially outwards extend to most peripheral part as described axially extended annular section from described center panel region.

Axially described in drawing blank can be near this blank center panel region by initial radial outside bending introduce in the annular section of described blank.

According to a seventh aspect of the present invention, a kind of central interior panel instrument is provided, its for the inner side of pressing blank in the manufacture of can end blank is reformed against described instrument, described instrument comprise axially outwards towards center panel region and the periphery surface of inclination, the periphery surface of described inclination from described center panel region axially inwardly and extend radially outwardly and its outer radial periphery edge end at outward direction vertically towards hollow toroid recess in.

In the embodiment of described instrument, the periphery surface of described inclination radially outward direction is axially upcountry bent away from described center panel region gradually to be formed slopely described in general as protuberance bulge loop.

In the other embodiment of described instrument, described hollow toroid recess by recessed to ground bending.

According to an eighth aspect of the present invention, a kind of frock for the manufacture of can end is provided, described can end waits to be bonded to an axial end portion for the tank body of the tank of pressurized content, described frock comprises: central interior panel instrument, it is used to form the can end inner side inner corresponding with tank, and be arranged in inwall instrument and install with one heart to be close to substantially the radially inner side wall of described inwall instrument, wherein said central interior panel instrument has periphery surface, the described periphery surface axis of orientation radially outside from the center panel region of described central interior panel instrument is to upcountry tilting, to make described periphery surface limit the axial inside annular recess in described center panel region together with the madial wall of described inwall instrument, and wherein said annular recess is configured to during the reforming process that blank is axially pressed to described central interior panel instrument, promote to form radially outward extending crimping in can end.

In the embodiment of described frock, described periphery surface traverses at least 25% the tilting with respect to axial direction of radial width of the described annular recess extending radially outwardly from described center panel region.

In the other embodiment of described frock, axially outwards towards hollow toroid recess form at the radially outward edge place of the periphery surface of described central interior panel instrument, thereby during the reforming process that blank is axially pressed to described central interior panel instrument, promote the described formation of the crimping extending radially outwardly together with the madial wall of described inwall instrument.

In the another embodiment of described frock, described periphery surface radially outward direction is axially upcountry bent away from described center panel region gradually to be formed slopely described in general as protuberance bulge loop.

According to the 9th embodiment of the present invention, a kind of frock for the manufacture of can end is provided, described can end is treated by dual seaming to an axial end portion of the tank body of tank, described frock comprises: in-house tool, described in-house tool is installed for forming can end and be arranged on the axial inner side of external tool on the sidepiece corresponding with the inner side of tank, described external tool, for form can end on the sidepiece corresponding with the outside of tank, comprising: central interior panel instrument; Inwall instrument, described inwall instrument around and substantially contiguous described central interior panel instrument arrange with one heart; Outside center panel instrument, it is relative with described central interior panel instrument; and at least one outer wall instrument, it is relative with described inwall instrument and around arranging with one heart with contiguous described outside center panel instrument substantially substantially, wherein, relative inwall instrument can move axially with respect to relative central interior panel instrument and outside center panel instrument with outer wall instrument, wherein, described outside center panel instrument has less external diameter than the internal diameter of the inner radial wall of described inwall instrument, described outside center panel instrument can dispose with one heart to reserve the radially circular clearance around described outside center panel instrument at least in part in described inwall instrument, and wherein, described central interior panel instrument comprises circumferential annular surface, the described circumferential annular surface axis of orientation radially outside around the center panel region of described inwall center panel instrument and from described center panel region is to upcountry extending, described circumferential annular surface defines the annular recess axially extending internally from the center panel region of described central interior panel instrument together with the inner radial wall of described inwall instrument, described annular recess is relative substantially with described circular clearance.

In the embodiment of this frock, described circumferential annular surface ends in annular recess at its radial outer end, and this annular recess is configured to during the reforming process that blank is axially pressed to described central interior panel instrument, promote to form the recess extending radially outwardly.

At least one outer wall instrument can comprise dog wall instrument, described dog wall instrument around and substantially contiguous described outside center panel instrument arrange with one heart, and traverse described circular clearance and the relatively extension substantially of described annular recess.

At this, described dog wall instrument can comprise relative with described annular recess axially inwardly towards annular surface, described inwardly towards surface along radially outer axis of orientation to outwards tilting.

According to a tenth aspect of the present invention, a kind of tank for pressurized content is provided, it comprises tank body, and described tank body has the can end of its one axial end of being bonded to, and described can end is selected from the group that comprises following can end: as the can end as described in arbitrary in first to fourth aspect; The can end of manufacturing by the method described in the 5th or the 6th aspect; The can end that uses the 7th instrument described in aspect to make; The can end that uses the 8th or the 9th frock described in aspect to make.

According to an eleventh aspect of the present invention, provide a kind of can end manufacturing equipment, it is configured to manufacture can end according to the method described in the 5th or the 6th aspect.

This equipment can comprise: according to the instrument described in the 7th aspect any one; And/or according to the frock described in the 8th or the 9th aspect any one.

According to a twelfth aspect of the present invention, provide a kind of can end manufacturing equipment, it comprises: according to the instrument described in the 7th aspect; And/or according to the frock described in the 8th or the 9th aspect.

According to the 13 aspect of the present invention, a kind of can end is provided, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises: loop configuration, and described loop configuration is recessed with respect to the outside of described can end and is connected to following structure: described loop configuration is radially with interior center panel structure; With dog wall construction, described dog wall construction axially outwards and radially outwardly extends around described loop configuration and from described loop configuration circlewise; And lid, label, mark or draw ring, or other material, in hollow toroid structure, arrange at least in part.

The embodiment of this can end can be used for following tank, the content of described tank for pressurizeing, and described can end is arranged so that in the time that can end is bonded to interior pressure in tank body and tank and increases, can end will distortion to make wall part in the every side of described loop configuration near the lid, label, mark, draw ring or other material that arrange in hollow toroid structure.

In the other embodiment of described can end, the opening that described lid, label, mark or draw ring can surround can end is substantially to maintain the aseptic and sanitary condition on the besieged outer surface of tank.

In the other embodiment of described can end, described lid, label, mark or draw ring can operate or form a part for opening for can end and/or a part for the hermetically-sealed construction again of can end altogether with the hermetically-sealed construction again of the opening of can end and/or can end.

In the other embodiment of described can end, described lid, label, mark, draw ring or other material can arrange to provide strengthening or control deflection and/or the failure behaviour of can end in described hollow toroid structure.

Other aspect and embodiment announce in the claim of annex 1 and explanation, its content and disclose a part that is incorporated into this and forms present specification.

Can end of the present invention can be considered to have center panel structure and dog wall construction, described center panel structure comprise the center panel of flat and radially outward, axial intilted panel wall; Described dog wall construction comprises dog wall, and described dog wall is connected to bound fraction in its radial and axial the inner with bending interconnecting gangway and in its radial and axial outer end.Center panel structure advantageously has the larger external diameter of internal diameter of comparing the opening being formed by the radial and axial inward flange of dog wall construction, and be axially placed in dog wall construction at least in part, comprise so that proper when the tank of described can end is pressurized that dog wall construction stops center panel axis of no-feathering to outwards through described opening.

The characteristic feature of can end of the present invention comprises annular flange, described annular flange as ring stiffener around center panel structure with stop center panel, tend to radially the inwardly outside protuberance of tractive center panel periphery.

Annular ring connects between center panel structure and dog wall construction, and extends radially outwardly with respect to the inner peripheral of dog wall construction around.Described annular flange is radially inwardly recessed to bending towards ground.

Radially outward, axial intilted panel wall is formed as ridge structure together with center panel, described ridge structure vertically outward direction is protruding power to be passed to annular flange from center panel to act as pseudopressure container not produce remarkable moment of flexure in center panel in the situation that.The panel wall that tilts is preferably protruding in bending, and can continuous bend at one end to incorporate center panel and to incorporate annular flange at the other end.

The bending interconnecting gangway at the radial and axial inner place of dog wall construction also preferably continuous bend to incorporate the opposite end of dog wall and annular flange.Alternately, bending interconnecting gangway can comprise one or more straight parts.Bending interconnecting gangway is protruding in bending towards radially inner direction, and act as the annular flange that the opening to being formed by the radially inward edge of dog wall construction is strengthened.

Can end can be configured in the time comprising that the tank of can end is pressurized and be enough to make can end distortion, and can end is by the failure mode presenting gradually.This can realize in the following way, the interconnecting gangway that is panel wall and dog wall construction radially inward edge place is all protruding in bending and be arranged to, along with axially outwards distortion of can end, described panel wall and interconnecting gangway by can end not in the case of losing efficacy in unique circumference thin spot place against or relative to each other docking, partially by or rolling.

The performance that can end has been improved allows it to be manufactured by thinner sheet material, and its geometric configuration can be adjusted to and uses and the equal area of the can end of prior art or the metal of area still less.

Central interior panel instrument of the present invention has periphery and forms surface, and this periphery forms surface and radially outward and axially upcountry tilts from central panel zone.This periphery surface preferably from the periphery of central panel zone radially outward direction axially upcountry extend gradually.The formation surface tilting is preferably bending continuously, and can for example have oval curvature or constant radius of curvature.At the radially outward edge place on the formation surface tilting, central interior panel instrument has recessed annular ring, annular ring is with than convexing into the radius of curvature that surperficial length is little, and annular ring promotes to form annular flange in the time that blank presses central interior panel instrument.Hollow toroid recess is preferably bent, and can have in certain embodiments substantially constant radius of curvature.

Hollow toroid recess is in axially outside summit and stops at the radially outward edge of central interior panel instrument.Described summit can advantageously make the curve of hollow toroid recess incorporate the inner radial wall of inwall instrument, and described inwall instrument is arranged in and forms during can end substantially neighboringly around central interior panel instrument.This frock according to the present invention defines annular recess, described annular recess between central interior panel instrument and inwall instrument, the center panel region of central interior panel instrument axially inwardly, in described annular recess, can under axial compression, be reformed by the blank of axially drawing.Periphery surface can advantageously radially outward and axially upcountry tilt as follows, and in the time that blank presses central interior panel instrument, the center panel of blank and/or panel wall region will be caused stretching.

Frock according to the present invention can comprise central interior panel instrument and inwall instrument on the axial inner side relative with external tool, and described external tool comprises outside center panel instrument and at least one outer wall instrument.Outside center panel instrument has the less diameter of diameter than central interior panel instrument, and can in inwall instrument, install to reserve at least in part circular clearance.By make relative inwall instrument and outer wall instrument with respect to relative central interior panel instrument and outside center panel tool spindle to upcountry moving, can in single axial compression action, be reformed against central interior panel instrument by the blank that axially outwards circular clearance is traversed in drawing.The feature of described frock is that the annular recess being formed by in-house tool is relative with the circular clearance between outside center panel instrument and inwall instrument.

According to the manufacture method of can end of the present invention comprise axial compression axially by the blank of drawing axial drawing part is reformed to be created in the panel wall, annular flange and the bending interconnecting gangway that extend between the center panel of can end and dog wall in single step.Advantageously, the step of axial compression blank is as making the center panel region of blank under tension force, increased can end center panel rigidity and reduced its slackness.

Reforming method has desirably given a series of preliminary curves in different phase, the can end wall construction that described curve subsides under further axial compression and plastic deformation is expected with formation.The method also can comprise and will be circularized recess by the wall pressure that extends axially of drawing blank, and described annular recess comprises bending hollow toroid recess, and this hollow toroid recess tends to promote to form the annular flange of tight rolling.

Advantageously, frock of the present invention and manufacture method can be implemented by existing can end press, and thereby can end of the present invention can make manufacturing equipment not being carried out material change or do not need to buy in new makers' situation.

Alternately, reforming method can complete in independent compacting or frock station, and blank is by drawing therein.Such as be easier to by other, for completing the higher drawing blank of machine processing of associative operation (curling, line, embossing etc.) if compare shorter reformation end, in independent compacting, completing so resurfacing operation can expect.In this case, reforming process can be used to that removal meeting occurs in center panel, for example caused lax by line or embossing operation.

Brief description of the drawings

In order to understand better the present invention, and illustrate how to implement the present invention to come into force, now will only make reference by means of example to appended accompanying drawing, in the accompanying drawings:

Fig. 1 show traditional can end through this can end, comprise the cutaway view in the plane of centre of gration axis of can end;

Fig. 2 show can end according to the present invention through this can end, comprise the cutaway view in the plane of centre of gration axis of can end, omitted any minutia of the center panel of can end;

Fig. 3 shows the birds-eye view of can end shown in Fig. 2;

Fig. 4 show Fig. 2 and Fig. 3 can end, with the similar cutaway view of Fig. 2;

Fig. 4 A shows the enlarged view of the circled part of cutaway view in Fig. 4;

Fig. 5 shows the enlarged view with identical section in Fig. 4 and 4A, shows the details of crimping and the dog wall part of can end;

Fig. 6 show Fig. 2 to 5 by dual seaming to the schematic cross sectional views of the stack successively can end embodiment on an axial end portion of the tank body of tank, in the plane of central rotation axis that comprises tank body and can end through described tank, show the deflection causing due to tank internal pressurization of can end, together with the enlarged drawing that has comprised the crimping of can end and the circular portion of dog wall part;

Fig. 6 A shows schematic cross sectional views (a) that under the internal pressurization increasing at tank along with can end, each superimposed image of Fig. 6 separates when deflection in order to (d), together with the corresponding enlarged view of circular portion that has comprised the crimping of can end and each image of dog wall part;

Fig. 6 B and 6C show for alternate embodiment about Fig. 6 and the corresponding view of 6A, in this alternate embodiment, can end contacts formation by panel wall with bending transitional region at first, thus mouth closure, and wherein said mouth is along with can end deflection under pressurization still remains closed;

Fig. 6 D and 6E show for alternate embodiment about Fig. 6 and the corresponding view of 6A, in this alternate embodiment, can end does not contact formation by panel wall with bending transitional region at first, thus mouth open, and wherein said mouth along with can end pressurization under deflection still stay open;

Fig. 7 shows another amplification detailed view similar with Fig. 5 view, it is at the specific key character through illustrating the can end embodiment of Fig. 2 to 6 in the plane at central rotation center can end, that comprise can end, and illustrating the specific key character according to the embodiment of frock of the present invention, described frock can be used to form such can end from blank;

Fig. 8 is the view similar with Fig. 7 view, illustrates the further feature of the frock that can be used to form can end;

Fig. 9,10 and 11 shows the frock of can end that is suitable for forming Fig. 2 to 7 from blank according to the present invention at the embodiment of different axial locations, and described axial location illustrates the annular flange that forms can end under axial compression;

Fig. 9 A to 11A is at the amplification view of circular portion through showing respectively Fig. 9,10 and 11 frock in the plane at central rotation center can end, that comprise can end, together with the blank that is just formed can end;

Figure 12 shows the can end of Fig. 7 to 11 and relevant tool at the amplification view through in the plane at central rotation center can end, that comprise can end, thus schematically illustrate how in blank, to produce material stream with during axial compression, cause center panel and/or panel wall part under tension force for forming can end from blank.

Figure 13 to 17 shows according to the embodiment of frock of the present invention at a series of amplification views through in the plane at central rotation center this frock, that comprise blank, form according to the embodiment of can end of the present invention from described blank, and show and form thus the in-order step of such can end;

Figure 18 shows with like Fig. 4 category-A, according to the enlarged view of the crimping of another embodiment of can end of the present invention and dog wall part, wherein limit crimping mouth sidewall be parallel;

Figure 19 shows with like Fig. 4 category-A, according to the enlarged view of the crimping of the another embodiment of can end of the present invention and dog wall part, wherein limit crimping mouth sidewall be bifurcated;

Figure 20 shows with like Fig. 4 category-A, according to the crimping of an embodiment again of can end of the present invention and the enlarged view of dog wall part, and wherein panel wall is straight substantially between center panel and crimping; And

Figure 21 shows with like Fig. 4 category-A, according to the crimping of an embodiment again of can end of the present invention and the enlarged view of dog wall part, and its middle cover, label, mark or draw ring are schematically illustrated as in the hollow toroid structure being formed by crimping and arrange.

Detailed description of the invention

In the following description, can end is formed by circular blank, and described circular blank has rotational symmetric central axis, in Fig. 3 and Fig. 4, is shown as axis X.This axis (it is corresponding with the central axis of the can end being formed by this blank) of described blank runs through this specification sheets and is used to limit the axial direction of blank, can end, tank body, tank (it has the can end that is attached to tank body of the present invention), also define the central axis of associated tool and frock, can form described can end by described instrument and frock.In the embodiment illustrating herein and describe, these parts all have common central axis.

The upside of can end shown in Fig. 2 is as corresponding in following side with can end, and this sidepiece will externally expose be bonded to an axial end portion of tank body in can end after.Similarly, the downside of can end shown in Fig. 2 is as corresponding in following side with can end, and this sidepiece will be positioned at tank be bonded to an axial end portion of tank body in can end after.Therefore two sidepieces of this of can end correspondingly refer to outside and the inner side of can end.Equally, run through this specification sheets, with regard to the right direction of the lateral surface of tank, refer to outside and outer axial direction, and inside referring to regard to the right direction of the medial surface of tank and interior axial direction.

Similarly convention is used to restriction instrument and frock, can make according to can end of the present invention by described instrument and frock.Correspondingly, " in-house tool " is relative to form the instrument of can end with the inner side of blank, and " external tool " is relative to form the instrument of can end with the outside of blank.

Except proposing clearly to describe non axial direction, otherwise this reference hierarchy and such mark will use in the whole text.For example, in the radial direction, by inwardly mentioning radially and radially outward radially inner side or the radial outside surface of direction or various parts, be clear that in this case and describe radial direction but not axial direction.

With reference to Fig. 1, as preliminary measure, it contributes to understand the structure of traditional can end 500.

Can end 500 shown in Fig. 1 in axial, see apparent time have substantially round-shaped, and in Fig. 1, be shown as can end 500 at the cutaway view through in the plane of this can end, described plane comprises the central axis of can end.Can end 500 shown in Fig. 1 is schematically illustrated, and about its central axis Rotational Symmetry.Can end shows in its initial situation forming, is formed by circular blank, before being attached to the end of tank body.The explanatory view of Fig. 1 has saved any details of the circular center panel that is conventionally applied to can end, for example draw ring and dependency structure, and by means of described draw ring and dependency structure, the opening in can end or hole can be opened.

As seen in Fig. 1, such can end comprises circular center panel 518, described circular center panel by the annular of the outside depression with respect to can end 500 immerse oneself in portion (countersink) 516 around.

The can end 500 of Fig. 1 is configured to the axial end portion to tank body by dual seaming, and correspondingly comprises and cover hook 524 and seaming panel 526.Dog wall (chuck wall) 514 from the recessed portion of immersing oneself in 516 vertically outside and radially outer direction extend, and be connected to seaming panel 526 via seaming interconnecting gangway 512.In known manner, can by use rotate dog by lid hook 524 and seaming panel 526 seamings to the end of tank body and can end 500 is connected to the axial end portion of tank body.

At the radial and axial inner place of dog wall 514, dog wall 514 is connected to the upper end of the radial outer wall 517 of the portion of immersing oneself in 516 via bending interconnecting gangway 550.Immersing oneself in the radial outer wall 517 of portion 516 is referred to as " vertically " wall substantially, and this is because this radial outer wall is alignd with the central axis of can end.

Similarly, immerse oneself in portion 516 and comprise vertical inner radial wall 515, described inner radial wall is alignd with the axial direction of can end substantially.Immersing oneself in the inner radial wall of portion 516 is connected to the periphery of the circular center panel 518 of can end 500 via bending interconnecting gangway 520.How can understand bending interconnecting gangway 520 by view shown in Fig. 1 shows in the center panel 518 of flat and has formed relatively compact bending between the vertical wall 515 of axially aligning of the portion of immersing oneself in 516 inner radial wall.The sharp transitions portion 520 of immersing oneself between vertical inner radial wall 515 and the circular center panel 518 of portion 516 makes to be engaged to the axial end portion of tank body and tank when pressurized in can end 500, and the tension force in center panel 518 is difficult to be delivered in the vertical inner radial wall 515 of the portion of immersing oneself in 516.Therefore, as being schematically shown in Fig. 1, the internal pressurization of tank can cause center panel 518 vertically outside direction swell.

Although structure shown in Fig. 1 is firm substantially structure, can bears large interior pressure with only little material thickness, but find that it has less desirable " spike leakage " as above failure mode.This is interpreted as because the portion of immersing oneself in 516 does not have the pattern losing efficacy gradually, so that can end 500 was lost efficacy the specific thin spot place tending to around the portion's of immersing oneself in 516 circumference, immerse oneself in the structure integrity of portion 516 at described some place and tend to seriously lose efficacy, cause that center panel 518 subsiding through a point of its diameter and outwardly-bent through this diameter, be often accompanied by the leakage at one or more somes place.

The structure of can end 500 shown in Fig. 1 provides several important advantages.Wherein main is to be provided with dog wall 514, and described dog wall is in becoming with its axial, longitudinal direction by the tank body in seaming the angle of inclination.Between seaming panel 526 and the axial end portion of tank body, formed after dual seaming, the interior pressure in tank is passed to seaming portion via the dog wall 514 tilting.In the can end of previous Fig. 1 can end, the wall section that the material between the center panel of tank and seaming portion comprises substantially vertically, axially aligns.Such structure means that any pressure that is applied to center panel inside face will directly be passed to seaming portion along axial direction, and it finally can cause failure mode, and wherein the inefficacy of seaming portion own and can end separate with tank body.

But, utilize the dog wall 514 of inclination, the power being given by the interior pressure of tank of inside face that acts on center panel 518 can part axially and part radially be passed to seaming portion, to make producing circumference stress in seaming portion, described circumference stress tends to force more tight closure of seaming portion, but not seaming portion is untied.Therefore the dog wall of this inclination is the structural constituent of expecting.Another benefit of dog wall 514 tilting is for the tank body of given diameter, reduces the periphery diameter of center panel 518 by radial separation between edge and the seaming portion of center panel 518 is set.The result of this minimizing diameter of center panel 518 is for the center panel 518 of given thickness, and the degree of center panel 518 centre deflection and the trend that therefore any opening draw ring that is associated exceedes seaming portion height to promote are reduced.

Fig. 2 to 5 shows the can end 10 as the embodiment of the present invention.Same can end 10 is shown as and is attached to tank body in Fig. 6 and 6A, and is that use will be in the can end producing about instrument, frock and the correlation technique described in Fig. 7 to 17.

Go back to Fig. 2, show according to the can end 10 of the embodiment of the present invention at the cutaway view through in the plane of central axis X can end, that comprised can end 10, described central axis is rotational symmetric axis.

The can end of Fig. 2 with the can end shown in Fig. 1 similar aspect the dog wall 14 with angle is provided, described dog wall is connected to seaming panel 26 and lid hook 24 by seaming interconnecting gangway 12, by described dog wall, can end can be by dual seaming an axial end portion to the tank body of tank.

The same with the dog wall 514 of the can end 500 of Fig. 1, the dog wall 14 of the can end 10 of Fig. 2 radially inwardly and axially upcountry extends from seaming interconnecting gangway 12.The dog wall 14 of can end 10 works in identical with the dog wall 514 of the can end 500 of Fig. 1 substantially mode, and thereby provides advantage and the benefit identical with the dog wall 514 of the above-mentioned can end 500 for Fig. 1 for can end 10.

The can end 10 of Fig. 2 is also provided with the center panel 18 of the flat similar with the center panel of the can end 500 of Fig. 1.

But at several important, critical aspects, the can end 10 of Fig. 2 is different with the can end of Fig. 1.

The portion of immersing oneself in 516 that replaces the can end 500 of Fig. 1, the can end 10 of Fig. 2 is provided with the annular flange 16 extending around circular center panel 18, and described annular flange is connected between center panel 18 and dog wall 14.The same with the can end 500 of Fig. 1, the can end 10 of Fig. 2, about central rotation axis X Rotational Symmetry as shown in Figures 3 and 4, means that the section shape of interconnecting gangway 50 bending between panel wall 20, annular flange 16, crimping and dog wall, dog wall 14, seaming interconnecting gangway 12, seaming panel 26 and lid hook 24 is constant substantially around whole circumference.Fig. 3 is the birds-eye view of Fig. 2 can end, and it is circular showing can end in axial.

As what explained about the can end 500 of Fig. 1 above, the situation of the not seaming forming before the can end 10 of Fig. 2 is shown as the axial end portion in being attached to tank body, at first.Like this, be shown as the situation in do not added stress by the interior pressure of tank.

Another key character of the can end 10 of Fig. 2 is that center panel 18 is provided with ring surface wooden partition 20 around its periphery, and described ring surface wooden partition radially outward and axially upcountry extends from smooth, circular center panel 18.

In the example shown in Fig. 2, panel wall 20 is set to the annulation of bending or protuberance, and described annulation, extends from center panel 18 along radially outer direction gradually away from center panel 18 bendings along axially inside direction simultaneously.This has caused cambered outwards protuberance, and the center panel 18 of flat.

In the example shown in Fig. 2, bending ring surface wooden partition 20 has constant substantially curvature, and incorporates smooth center panel 18 at its radial inner end 34 places.But what can envision is that panel wall 20 can have non-constant curvature, and even can have one or more straight, but the section tilting.

In addition be smooth substantially although center panel 18 is shown as, but technical personnel can and will be provided with additional feature conventionally by understanding center panel 18.Such feature can comprise line, embossing, draw ring annex, lettering or form one or more holes.Any hole can be curled into and hold closing device or valve, and center panel 18 can be shaped to be suitable for these closing devices or valve.

It is also known that to center panel 18 the strengthening feature such as intermediate step or evagination crimping is provided, to provide other rigidity for center panel.The invention is intended to contain all such remodeling to center panel 18 structures, and be intended to aspect this, do not limiting, but following scope, structural strength and the integraty that can not be positioned at the residue character beyond circular center panel 18 peripheries to can end cause negative effect.

Bending panel wall 20 act as approximate ideal and changes into the pressure container of shape, outwards protuberance in case can be by the tension force radially producing in center panel 18 through panel wall 20 along cumulative axial direction transmission.This has in minimizing panel wall 20 and the effect of the moment of flexure at periphery 30 places of circular center panel, and following effect, being center panel 18 will tend to keep flat without excessive outside protuberance, and the internal pressurization of the tank being incorporated in to due to can end 10 and less deflection.

Axial inner ends, the radial outer end 38 of panel wall 20 are connected to annular flange 16.Annular flange 16 is the tight rolling section of can end wall in the example shown, and it keeps the constant curvature of cardinal principle through more than 180 degree in section, advances along radially outer direction from center panel 18 along can end wall.

Closely the annular flange 16 of rolling tends to act as ring stiffener, and anchoring section firm in structure is provided, and the construction of pressure vessel of the protuberance of center panel 18 and panel wall 20 is anchored on described anchoring section.Annular flange 16 thereby outer wall effect that can similar drum, on whole described annular flange, the drum head that center panel 18 and panel wall 20 are similar to stretching keeps under tension force effect.

It is smooth that this contributes to maintain center panel 18, and thereby allow larger degree of freedom determining aspect size, shape and the position of any opening for the treatment of in center panel 18 or wherein form or pore structure.For example, being easy to make center panel outwards in the can end of protuberance, become the center-biased with center panel at hole shape, when described can end, to be bonded to deflection that tank body and described tank body produce when pressurized will can not be uniformly and may cause at thin spot or the stress at the associated circumferential point place around center panel and concentrate.This can cause the non-progressive failure mode of can end.Similarly, if form hole and for example, by closure, sealed by the closing means that can reseal in center panel, what expect for Kong Eryan so is to depress equably distortion in adding of tank, otherwise sealing between closing means and hole can break, and causes leakage.

The beverage can end of describing type in the beverage can end that can again seal, for example patent publication us WO2007/128810 need to form hole conventionally in center panel.Normally, central portion is inserted into the closed also formation sealing of in hole so that this hole.For such Kong Eryan often preferably with the center-biased of center panel.This biasing make the more close reinforcement crimping suspending downwards of a side in hole and therefore the periphery in hole become and supported unevenly.Thereby in the time that container is pressurized and protuberance occurs, the alteration of form in hole and flat rounded seal become non-circular and/or non-flat forms and can leak along with temperature and pressure fluctuation.

Utilize this structure, because the center panel 18 of can end 10 has reduced protuberance and center panel 18 is maintained to relatively flat, so even the center-biased of hole and center panel 18, any inhomogeneous deformation or the distortion in hole also can be eliminated.

The other end of annular flange 16 be connected to via bending transition zone 50 can end 10 dog wall 14 radial and axial inner 13.

The key character of the can end of Fig. 2 is that bending interconnecting gangway 50 defines the radially inward edge 50e of dog wall construction, and this radially inward edge 50e is suspended from the radially outward edge 16e of annular flange 16.

As shown in Fig. 3 birds-eye view, radially inward edge 50e presents the hole of special diameter d1.Annular flange 16 presents the pseudopressure structure of container with outside diameter d 2 together with panel wall 20 and center panel 18.In brief, thereby can see, when can end is attached to tank body and tank when pressurized, interior pressure promotes pseudopressure structure of container by tending to along axially outside direction, can not coordinate the hole presenting through the radially inward edge 50e by dog wall construction but this structure has excessive diameter.Center panel structure thereby excessive so that the hole being provided by dog wall construction can not be axially outwards provided.

Be similar to the can end 500 of Fig. 1, the dog wall construction of Fig. 2 is as the interior pressure of the tank acting on against can end 10 is delivered in seaming portion along axial and radially outer direction.This figure has following structure again, is firm aspect the pressure that described structure is transmitted through dog wall 14 in opposing, and described structure is not easy to make dual seaming to untie, and by described dual seaming, can end 10 is attached to the axial end portion of tank body.

The periphery accessory structure of can end 10 can see in the enlarged view of Fig. 4 A, and described enlarged view is corresponding to the part of drawing a circle in Fig. 4 of can end 10.

In this example, panel wall 20 not only incorporates circular center panel 18 smoothly, and described panel wall is also arranged to incorporate smoothly the inner 44 of annular flange 16.Similarly, the bending transition portion area 50 between the outer end 48 of annular flange 16 and the inner 13 of straight dog wall 14 incorporates straight dog wall 14 smoothly from the outer end 48 of crimping 16.

Thus, it should be noted that term " dog wall construction " is intended to contain any structure that extends to seaming panel 26 from the radially inward edge 50e of dog wall construction.Although dog wall 14 is shown as directly in the n-lustrative embodiment of Fig. 2 to Figure 17, but technical personnel will be known the dog wall with alternative structure.For example, dog wall is can be with respect to the outside of can end 10 protruding or lowland is bending, or can comprise one or more steps or angled part along its length.The function of this spline structure and object are known for those skilled in the art, and described structure can freely be applied in combination with the remaining structure of current can end 10.The invention is intended to compare the straight wall 14 illustrating in appended accompanying drawing and cover other such dog wall construction.However, to be susceptible at present dog wall 14 can be straight or comprise one or more straight parts.

As noted above, the structure outer recessed, tight rolling of annular flange 16 contributes to give crimping its structural strength, and especially it is to the inside resistibility of tension force radially.The curve shape of bending interconnecting gangway section 50 also provides similar structure integrity to the radially inward edge 50e of dog wall construction.Bending interconnecting gangway serially bending maybe can comprise straight part.Structure 16 and 50 thereby act as interior annular flange structure and outer ring bead structure.

Annular flange provides the reason of structural strength to be contemplated in one way by consideration Fig. 4 A.

In the figure, the protruding outer end 38 to bending panel wall 20 and recessed point of transition 40 between the inner 44 of bending annular flange 16 can be identified as flex point, change to recessedly with respect to the outside of tank from protruding at described flex point place curve, extend in annular flange 16 from center panel 18 along radially outer direction.But, if interconnecting gangway is straight section but not flex point, the end that the outer end 38 of panel wall 20 stops recessed some place (at its straight extended spot) and be regarded as the radially outermost concave portion of panel wall 20 at it so, and the inner 44 of crimping 16 is regarded as the point (being its straight extended spot) that recessed curve stops.The outer end 48 of annular flange 16 can be identified as the point that recessed curve stops again, is flex point in this case, and at described flex point place, this curve switches to the evagination curve of bending interconnecting gangway 50 at once.

Also can see seamlessly transitting between panel wall 20 and circular center panel 18, and point of transition 30 is defined as the end point of substantially smooth center panel 18, this is identical with the radial inner end 34 of panel wall 20.

Return and consider that annular flange 16, this annular flange are formed with the bead wall 46 between bead wall inner 44 and bead wall outer end 48.As explained above, in the time that can end 10 is attached to the axial end portion of tank body and tank by internal pressurization, inside compressing that center panel 18 acts on and along outward direction to the described center panel application of force.This masterpiece is that tension force is passed through panel wall 20, and thereby annular flange 16 is applied to radially inner tension force.But, as to understand from Fig. 4 A, annular flange 16 with respect to radially inner direction, be also recessed towards the central axis X of can end 10, make it tolerate very much any radially inner power.Like this, in the time that tank pressurizes, due to the tension force producing in circular center panel 18, annular flange 16 provides the powerful resistance to radially inwardly promoting annular flange 16.

For example, this can compare with the behavior in the center panel region 518 of can end 500 shown in Fig. 1.Can easily understand that from the structure of can end 500 of observing Fig. 1, for the pressure in tank, any radially inward direction promotes to immerse oneself in the trend of portion 516 and is mainly subject to immerse oneself in vertical wall 515 and immerse oneself in the opposing of wall 517 outward.But these are immersed oneself in wall and have substantially smooth ring structure, compare annular flange 16 continuous bend, that footpath concaves, described ring structure does not more tolerate radially inner deflection.

As seen in Fig. 4 A, the critical aspects of this structure is the radially outward direction of bead wall 46 at point of connection 48 places of itself and bending wall section 50.In fact, this can be by admitting that annular flange 16 extends radially outwardly and gives feature with respect to the radial inner end 50e of dog wall construction.

In the example shown in Fig. 4 A, annular flange 16 is shown as has substantially constant curvature between (moving along the radially outward direction of bead wall 46) radial inner end 44 and radial outer end 46, but can be contemplated to suitable annular flange wall construction, can be set as curvature non-constant.Similarly, also can be contemplated to bending transition wall 50 and there is non-constant curvature, but as shown in Figure 4 A, curvature is substantially constant between the outer end 48 of bead wall 46 and the radial inner end 13 of straight dog wall 14.

Annular flange 16 by relatively tight rolling to provide structural strength to act as ring stiffener.If see, the radius of curvature of the annular flange 16 substantially radius of curvature of specific surface wooden partition 20 is less.Also accessible be the radius of curvature of bending interconnecting gangway 50 also the radius of curvature of specific surface wooden partition 20 is less substantially, and be similar to the radius of curvature of annular flange 16.This contributes to give respectively annular flange 16 and bending interconnecting gangway 50 their opposings to radially inside or outside deflection, and the more cumulative curvature of panel wall 20 contributes to the in the situation that of not producing undesired high moment of flexure in panel wall 20 or center panel 18, the tension force in center panel 18 to be delivered in annular flange 16 simultaneously.

Can find out except protruding to bending panel wall 20 and protrudingly arrange opening to the mouth m place forming between bending transition zone 50, annular flange 16 connects as circle in substantially.Mouth m is these two the protruding points to close approximation between warp architecture, and the point of described close approximation is the most approaching by the interior Jie Yuan of annular flange 16 center.Another characteristic of illustrated embodiment of the present invention is characterised in that, due to the axial inside and radially outer slope characteristic of panel wall 20, the configuration extending radially outwardly in conjunction with annular flange 16, mouth m be positioned at inscribed circle axially beyond and radially in.

The angle that this outward extending characteristic of annular flange part 16 also can present with respect to the central axis X of can end 10 by the end 44 and 48 of consideration annular flange wall 46 is expressed.

As shown in Figure 5, point of transition 40 places of the inner 44 of annular flange wall 46 between panel wall 20 and bead wall 46 are with respect to the axial direction angle presentation α of can end 10.

This angle [alpha] is through measuring in the section that comprises centre of gration axis X of can end 10.This angle from axial outward direction around to can end 10 tangent line at the wall of bead wall 46 radial inner end 44 measure.Angle [alpha] is measured along can end wall at the outward direction of central axis X and from center panel 18 between the tangential direction that radially outward direction is advanced.Angle [alpha] is the angle between this both direction on the radial outside of central axis X, moves around to tangential direction from direction radially outward.

As shown in Figure 5, angle [alpha] is approximately 135 degree.Angle [alpha] is preferably less than 180 degree, be more preferably less than 150 degree, to obtain with the panel wall 20 tilting and cause with minimum the beneficial effect that moment of flexure is associated, wherein, by the tension force in circular center panel is passed to the annular flange 16 in tension force from center panel 18, the panel wall of described inclination is close to the behavior of idealized pressure container.

At 48 places, contrary outer end of annular flange wall 46, bead wall defines the angle beta about outside axial direction.This angle is measured in the recessed end to curved section of annular flange wall 46 as the tangent line of annular flange wall again, and intends to measure in the section of centre of gration axis X that comprises can end 10.Angle beta is radially inwardly advanced to the tangentially measurement of bead wall 46 from axial outside direction.The direction of the tangential wall adopting is the direction of advancing from center panel 18 in described wall, along panel wall 20 and in direction radially outward around bead wall 46, although end points 48 places that are oriented in of bead wall 46 are inside such direction radially by reality.

As shown in Figure 5, angle beta is approximately 90 degree, and preferably exceedes 45 degree substantially, more preferably exceedes 60 degree.

In all cases, to be on inner surface and outer surface at end points 44 and 48 will be normally identical to tangent line; But, the in the situation that of any difference, should be taken to cutting angle of inner surface.

Fig. 5 has also shown angle θ, and this angle is dog wall 14 with respect to the vertically and radially outward angle of direction of axial outward direction.The in the situation that of straight dog wall, this angle is the angle of the tangential direction on the outer surface of can end 10 along dog wall 14.In the case of dog wall be bending or dog wall comprise other such as angle connect, the loop configuration such as two angle or step, angle so to be measured be bending interconnecting gangway 50 axial outer end its stop protruding to point (corresponding to the point being connected with the inner 13 of dog wall 14 in illustrated embodiment) and the axial inner ends of seaming interconnecting gangway 12 its stop protruding to point (corresponding to and illustrated embodiment in the point that is connected of the outer end 15 of dog wall 14) between angle.

Angle θ with respect to axial direction preferably from 20 degree to 70 degree.For angle θ, preferred angle is from 25 to 60 degree, even more preferably, between 33 degree and 50 degree, and is still more preferably approximately 45 degree, although it is optional for dog wall 14 to be tilted.

Fig. 6 show Fig. 2 to 5 by the schematic cross sectional views of stack successively can end 10 embodiment after dual seaming is to an axial end portion of the tank body of tank, in the plane of central rotation axis that comprises tank body and can end through described tank, show the deflection causing due to tank internal pressurization of can end 10.Fig. 6 also shows the enlarged view of the circular portion of the superimposed image of Fig. 6, and described enlarged view has comprised along with can end crimping and dog wall part of can end when deflection under the internal pressurization of tank.

Fig. 6 A shows schematic cross sectional views (a) that under the internal pressurization increasing at tank along with can end, each superimposed image of Fig. 6 separates when deflection in order to (d), together with the corresponding enlarged view of circular portion that has comprised the crimping of can end and each image of dog wall part.These accompanying drawings have been explained the failure mode of can end 10 in the time that the pressure reduction between inner side and the outside of tank increases, and wherein built-in pressure ratio external pressure is higher.

The situation that presents the catastrophic failure mode that is known as " spike leakage " from the meeting of can end 500 shown in Fig. 1 is different, and can end 10 (for the can end material of given thickness, and under high pressure) presents failure mode gradually.So reason is thought as follows.

As noted above, panel wall 20 protruding to curved outside surface and bending interconnecting gangway 50 protruding to curved outside surface at the mouth m place of annular flange portion 16 toward each other.The current mouth m in the can end of compacting and formation as shown in the image of Fig. 6 A (a) expecting opens to the outside of can end 10, but not the opposite side 20,50 of mouth m forms contact in the time that described can end is pressed.Such structure allows hollow toroid recess cleaned and aseptic, has also prevented that any surface treatment or the coating on outside face is damaged.

With reference to Figure 21, one of open type can end structure may relevant advantage be that it allows lid, mark, draw ring or label 200 to be inserted in mouth m before or after on tank body in seaming.Described lid, mark, draw ring or label 200 can be flexible (for example paper, card or plastics).Such lid, mark, draw ring or label 200 can provide information or advertisement.Can understand from the explanation of following deflection behavior, such lid 200 may be pressurized at tank, and (for example, by filling) is inserted in the crimping mouth m of can end 10 before, and due to mouth m closed being held at least in part in the time that tank is pressurized.That is to say, lid, label, mark or draw ring 200 are by between the wall part being crushed in the every side of mouth m.Under present case, these wall parts are parts of panel wall 20 and curve transition wall 50.

Such lid, label, mark or draw ring 200 can encapsulate the opening conventionally arranging in center panel 18 of can end substantially, to maintain the situation of aseptic on the packed outer surface of can end or health.This can prevent from polluting can end opening, and thereby allows the content of tank directly wholesomely to be consumed from described tank.Similarly, lid, label, mark or draw ring 200 can with the opening of can end 10 and/or again hermetically-sealed construction operate altogether or be formed as described opening and/or a part for hermetically-sealed construction again.For example, described lid or similar structures may launch to form filling pipe end, or seal for the opening of tank provides again after being opened.

Be clear that, such feature can similarly be applicable to the can end of non-pressurised tank, lid, label, mark or draw ring 200 can be fixed on opening in mouth of hollow toroid structure in the following manner in this case, by bonding or by the wall pressure at mouth sidepiece place is become to be forced on described lid, label, mark or draw ring 200 or by form certain thickness in the mouth m of hollow toroid structure close-fitting lid, label, mark or draw ring 200.

Another possible advantage is that material can deposit in mouth m, for example, provide other reinforcement and/or deflection and/or the failure behaviour of control can end 10 to crimping.

But the mouth structure of opening is not thought important, and the present invention is also intended to contain, and mouth m ' is wherein utilized that relative panel wall 20 contacts with bending interconnecting gangway 50 and the example (for example seeing Fig. 6 B and 6C) that forms.

Image (a) in Fig. 6 A illustrates the can end in the time being filled pressurized content by dual seaming on can end and under normal condition.As shown in Fig. 6 and 6A, if increased by the interior pressure of dual seaming tank extremely or when external pressure reduces, can end 10 is by deflection under the impact of pressure reduction so when can end 10.This flexing action promotes to comprise the protuberance center panel region of center panel 18 and dip plane wooden partition 20 with outside vertically direction.Meanwhile, dog wall 14 is similar to leverage, and bending so that in the axially outwards deflection of the radially inward edge 50e place of dog wall construction.

This motion forces the pseudopressure container of center panel 18 and inclination periphery 20 to enter in the opening being limited by the radially inward edge 50e of dog wall construction, is to block hole in essence.This makes two relative sidepieces 20 of mouth m contact (if they also do not contact) with 50, as can be seen in the image of Fig. 6 A (b), and partially leans on each other.The image (b) of this Fig. 6 of the being docked at A on a surface and another surface and (c) in illustrated by the some place of m ' expression, wherein mouth m closure.

Think that this sidepiece 20 and 50 that has caused contact is against rolling and slip each other, and prevented any defect occurring in single annular location.Result is, by the axial outside further deflection of can end 10, the panel wall 20 of center panel 18 and protuberance finally forces their path through the hole being limited by the radially inward edge 50e of dog wall construction, and do like this thereby annular flange portion 16 will finally increase with pressure reduction and launch equably and little by little with bending interconnecting gangway 50, and do not lose efficacy at single thin spot place.In the time that this occurs, as what seen in the image of Fig. 6 A (d), can end 10 " is dug (flip) " by from inside to outside.

During this process, dog wall 14 is also with outwards little by little deflection of progressive mode.Meanwhile, the angle of dog wall 14, for transmitting compressive force radially outwardly, is subject to forming the obstruction of the can end of dual seaming and the puckered ring of tank body material.This contributes to maintain the integraty of dual seaming until after in fact can end 10 from inside to outside dug.

The other effect of the protuberance center panel structure 18,20 contacting with the inner peripheral 50e of dog wall construction is that dog wall 14 does to hinder the axial outside motion of center panel 18, and thereby further effect is to prevent draw ring situation of (tab-above-seam) above seaming portion, wherein the opening draw ring in center panel extends axially the plane that exceedes the axial outermost edge of seaming portion.This can be understood from the image of Fig. 6 A (a), (b) with (c), and how the center panel 18 that described image shows protuberance keeps below the plane at dual seaming top.

Deflection shown in Fig. 6 and 6A and failure mode can form and contrast with two similar alternate embodiments as shown in Fig. 6 B and 6C and Fig. 6 D and 6E of the present invention.

As what seen in the image of Fig. 6 C (a), this can end is formed with closed mouth m ' at first.As being expected, this very closely reflects the behavior of the can end of Fig. 6 and 6A, wherein dog wall 14 hinders the outside motion of center panel structure 18,20, and before from inside to outside digging, can end maintains the integraty of can end until (see Fig. 6 and 6B, and image (c) in Fig. 6 A and Fig. 6 C) appears in the significant protuberance degree of center panel 18.

As seen in Fig. 6 D and 6E, another embodiment is illustrated, and wherein mouth m is formed at first and opens, and can end is configured to until the stage of from inside to outside digging, and mouth m stays open, and wherein the opposite side portion of this mouth does not contact.Can understand from comparison diagram 6D and Fig. 6 and 6B, the center panel 18 in the 3rd embodiment can't benefit from dog wall 14 by center panel structure 18,20 to returning the binding effect keeping.Like this, than two other embodiment (seeing the image (c) of Fig. 6 A and 6C), before can end is from inside to outside dug, can adapt to the less a little protuberance degree (seeing the image (c) of Fig. 6 E) of center panel 18.

Can end 10 shown in the accessible Fig. 2 to 5 of being is in the situation immediately following form at first can end from circular blank, and other procedure of processing can be performed, strengthen structure such as increasing, draw hole and by draw ring be attached to center panel or by curling peripheral cover hook to intended shape with for seaming is to the end of tank body.Similarly, liner can be added into can end to be formed sealing by seaming to time on tank body in described can end.

With reference to Fig. 7 to 12, description is suitable for forming to the frock of the embodiment of can end shown in Fig. 2 to 6.Fig. 7 to 12 shows the cutaway view of frock and in being formed as the circular blank 5 each stage, in the plane of the central axis X that comprises can end 10 through described frock and can end of can end 10, this central axis is also the central axis of blank 5 and the common center axis of described frock.

Fig. 7 shows the amplification view of described frock in the time that the formation step for the manufacture of can end finishes.

Frock comprises the in-house tool that is used to form can end inner surface and the external tool that is used to form can end outer surface.In-house tool is arranged in blank locates with on corresponding inside can end axial inner side, and external tool is arranged in and blank locates with on corresponding outside can end contrary axial outside.

In-house tool comprises central interior panel instrument 60 and inwall instrument 70.As directed, inwall instrument 70 with one heart around and contiguous central interior panel instrument 60 substantially, to make the radial outer wall 68 of central interior panel instrument 60 be adjacent to the inner radial wall 72 of inwall instrument 70.As will be discussed in more detail, blank 5 being formed as in the process of can end 10, the inner radial wall 72 of inwall instrument 70 operates altogether with the structure of central interior panel instrument 60 valuably.

External tool comprises outside center panel instrument 80, outer dog wall instrument 90 and outer seaming instrument 100.External tool is arranged with one heart, its China and foreign countries' dog wall instrument 90 around and contiguous outside center panel instrument 80 substantially, to make the radial outer wall 86 of outside center panel instrument 80 be adjacent to the inner radial wall 94 of outer dog wall instrument 90, and outer seaming instrument 100 around and contiguous substantially outside dog wall instrument 90, to make the radial outer wall 96 of outer seaming instrument 100 be adjacent to the inner radial wall 104 of outer seaming instrument 100.

In-house tool and external tool are also relative to each other, arrange about the corresponding central axis of the central axis X of the can end being used to form with the described frock central axis of the circular blank 5 of can end 10 (and treat to be formed as by described frock) with one heart.

Instrument is arranged so that in-house tool can relative to each other move axially, and external tool can relative to each other be moved axially.Similarly, in-house tool can move axially with respect to external tool.Retrain toward each other the movement of external tool with respect to in-house tool by in-house tool and external tool.Especially, central interior panel instrument 60 is relative with outside center panel instrument 80, and inwall instrument 70 is relative with outer seaming instrument 100 with outer dog wall instrument 90.Outer dog wall instrument 90 and outer seaming instrument 100 thereby be also considered to outer wall instrument.

As shown in Figure 8, outside center panel instrument 80 has following external diameter in its radial outer wall 86 places, and this external diameter is less than the internal diameter at the inner radial wall of inwall instrument 70 72 places, and less than the external diameter at radial outer wall 68 places of central interior panel instrument 60 similarly.Like this, outside center panel instrument 80 can move axially to become at least in part and install in described inwall instrument 70, between the inner radial wall 72 of inwall instrument 70 and the radial outer wall 86 of outside center panel instrument 80, reserves circular clearance G.

The inner radial of outer dog wall instrument 90 is arranged in traverses circular clearance G on the outside of frock and extends, and the outer radial periphery part of central interior panel instrument 60 is arranged in and traverses circular clearance G on the inner side of frock and extend, these parts of described two instruments thereby in this region also toward each other.In the operation of frock, relative central interior panel instrument 60 moves together with 100 with outer wall instrument 90 with respect to relative inwall instrument 70 with outside center panel instrument 80, to realize the axial compression of the part 7 of blank 5 between the inner radial of relative outer dog wall instrument 90 and the outer radial periphery portion relative with this inner radial of central interior panel instrument 60.

Especially, described frock is configured to form by the portion that extends axially 7 of traversing the circular clearance G extension between upper tool and lower tool of axial compression blank 5 panel wall 20, annular flange 16 and the bending interconnecting gangway 50 of can end 10.

The vitals of frock is central interior panel instrument 60.Central interior panel instrument 60 have axially outwards towards surface, this surface is configured to promote to form panel wall and the annular flange structure of can end 10.The profile of central interior panel instrument 60 is axially inwardly corresponding substantially towards the shape of part with the center panel 18 of the inside face of can end 10, panel wall 20 and annular flange 16.

In example herein, central interior panel instrument 60 has the center panel region 62 of flat.Inclination perisporium 64 radially outward and axially upcountry extends from the edge of central panel zone 62.In the section of central axis that has comprised frock, the radially outward edge of inclination perisporium 64 ends in axially outside summit 67, so as to form outward direction vertically towards hollow toroid recess 66.Hollow toroid recess 66 corresponding with annular flange 16 and be arranged to promote form described annular flange.Especially, hollow toroid recess is towards the clearance G forming between outside center panel instrument 80 and inwall instrument 70.

Central interior panel instrument 60 is characterised in that center panel region 62 incorporates inclination perisporium 64 smoothly in its periphery.Inclination perisporium 64 is shaped as radially outside direction and is axially upcountry bent away from gradually center panel region 62.In the example shown, bending inclination perisporium incorporates smoothly center panel region 62 and incorporates hollow toroid recess 66 at its radial outer end place at its radial inner end place.

The portion that extends axially 7 of the bending blank 5 that is axially pressed central interior panel instrument 60 as excitation gradually away from center panel region of inclination perisporium from central panel zone 62 radially outward direction be outwards crimped onto angled perimeter surface 64, thereby the inside face of blank will take central interior panel instrument 60 axially to the shape of outside face.In the example shown, inclination perisporium 64 has substantially constant curvature, can comprise straight section although can be contemplated to inclination perisporium 64, but described straight section axially inwardly and radially outwardly tilts.

Hollow toroid recess 66 is also shown as has constant substantially curvature, and has the significantly less radius of curvature of radius of curvature of the protuberance of comparing inclination perisporium 64.This hollow toroid recess 66 just allow by a part for the intermediate annular part 7 of the blank 5 of axial compression during described axial compression process in described recess rolling or roll, to produce the annular flange 16 of tight rolling.This rolling of annular flange is also as the blank material in the region of drawing center panel radially outwardly 6, closely makes center panel region 6 enter extended state when rolling to be pressed against central interior panel instrument 60 and annular flange 16 at the blank being just formed in annular recess 66.

Lower center panel instrument 60 is arranged to inner radial wall 72 operation altogether with inwall instrument 70 valuably.As seen in Fig. 7, provide relative level and smooth transition between hollow toroid recess 66 and the inner radial wall 72 of inwall instrument 70 on the axial outside annular summit 7 of the peripheral region of inclination perisporium 64.The inner radial wall 72 of lower wall instrument 70 thereby work in order to suppress the radially outer deflection of the portion that extends axially 7 of blank 5 in the time that blank compresses in the G of circular clearance.This so contribute to urge material to be formed as the volume in annular recess 6, and make described material in the time that axial compression is further carried out by tightr rolling.

The inclination perisporium 64 of central interior panel instrument defines annular recess R with hollow toroid recess 66 together with the inner radial wall 72 of inwall instrument 70.Annular recess R is recessed, vertically outside direction towards, and be recessed into respect to the center panel region 62 of central interior panel instrument 60 flat.Annular recess R is relative substantially with circular clearance G between outside center panel instrument 80 and inwall instrument 70.

Outside center panel instrument 80 has the larger external diameter of diameter in the smooth center panel region 62 of comparing central interior panel instrument 60 at radial outer wall 86 places.In described example, the center panel region 82 of outside center panel instrument 80 is also less times greater than the center panel region 62 of central interior panel instrument 60.Outside center panel instrument 80 also has inclination perisporium 84, and described inclination perisporium extends to radial outer wall 86 along axial outside and radially outer direction from central panel zone 82.Inclination perisporium 84 preferably bends to from central panel zone 84 and axially outwards extends gradually along radially outer direction.As directed, inclination perisporium 84 is bending at one end incorporate center panel region 82 and incorporate radial outer wall 86 at the other end serially.Inclination perisporium 84 can have constant radius of curvature.

As seen in Fig. 8, inclination perisporium 84 have important function be to allow circular blank 5 by axial drawing outwards to form from the center panel region 6 of blank 5 axially and the intermediate annular part 7 extending radially outwardly.The intermediate annular part 7 of this axial drawing interconnecting gangway 50 with forming surface wooden partition 20, annular flange 16 and bending by axial compression subsequently just.In axial drawing process, the curvature of inclination perisporium 84 allow circular blank not around sharp corner bending in the situation that around outside center panel instrument 80 by drawing, described sharp corner can be damaged the coating in blank material or cause and cause the stress of drawing defect to be concentrated.

Diameter compared with the center panel region 62 of central interior panel instrument 60 has larger diameter, outside center panel instrument 80 also makes to be formed with radially outer curve by intermediate annular part 7 drawing, axially extended, and this curve promotes this intermediate annular part approaching the initial deformation at some place of periphery in center panel region 6.Therefore,, in the time that middle annular section 7 is axially pressed central interior panel instrument 60 subsequently, this intermediate annular part is out of shape the point that tends to the radially outward curve forming from the inclination perisporium 84 by outside center panel instrument 80 radially outwardly.This has promoted blank material in the radially penetrale 7a of intermediate annular part 7 in described blank outside face rolling radially outwardly along central interior panel instrument 60 during first by axial compression, thus this radially penetrale 7a take the shape of perisporium 64.

As mentioned above, inwall instrument 70 is relative with the outer wall instrument that comprises outer dog wall instrument 90 and outer seaming instrument 100.

In order to form inclination dog wall 14, outer dog wall instrument 90 comprise axially inwardly towards dog wall surface 92, axially bevel outwards and radially outwardly of described dog wall surface.Inwall instrument 70 comprise similarly axially outwards towards surface, this surface comprises and is formed as the inner radial of dog wall construction 74 and axially outside and angled radially outwardly in the mode identical with outer dog wall instrument.The dog wall surface 74 of inwall instrument 70 is relative with the dog wall surface 92 of outer dog wall instrument 90, and the part of outermost portion 8 that these surfaces clamp circular blank 5 during drawing and reformation blank 5 is to form dog wall 14.

In a similar fashion, in order to form seaming panel 26, outer seaming instrument 100 comprise axially inwardly towards seaming panel surface 102, this seaming panel surface extends radially outwardly and is recessed to bending a little towards axially inside direction.Inwall instrument 70 axially outwards towards surface comprise similarly radially outer, this radially outer is formed as seaming panel surface 76, this seaming panel surface extends radially outwardly in the mode identical with the seaming panel surface 102 of outer seaming instrument 100, and vertically outside direction protruding a little to ground bending to mate with the bow portion of the seaming panel wall 102 of outer seaming instrument 100.The seaming panel surface 76 of inwall instrument 70 is relative with the seaming panel surface 102 of outer seaming instrument 100, and the radially outer of outermost portion 8 that these surfaces clamp circular blank 5 during drawing and reformation blank 5 is to form seaming panel 26.

Accessible is that described frock is configured to utilize relative inwall instrument 70 and outer wall instrument 90 to come forming surface wooden partition 20, annular flange 16 and bending connecting bridge 50 with 100 along the only single axial motion of the direction with respect to relative central interior panel instrument 60 and outside center panel instrument 80.

Fig. 9 to 11 shows during forming can end 10 by axial compression blank 5 frock at the cutaway view of several different axial positions.Fig. 9 A to 11A shows respectively the enlarged view of the circular portion of Fig. 9 to 11.

Nominally circular blank can be considered to comprise three regions: the center panel region 6 corresponding with the center panel region 62 of central interior panel instrument, traverse from the periphery of central panel zone 6 intermediate annular part 7 and the most peripheral part 8 that circular clearance G extends radially outwardly, the part that its radially inward edge 72 from in-house tool 70 that is blank 5 extends radially outwardly.These regions thereby be defined with respect to frock, and accessible be due to blank 5 by drawing and while reforming material stream from a region to next region, so the certain material of blank 5 in each region can change during turned blank.

In Fig. 9, the most peripheral part 8 of relative inwall instrument 70 and outer wall instrument 90 and 100 clamping blanks 5, and relative central interior panel instrument 60 and outside center panel instrument 80 clamp the center panel region 6 of blank 5.The intermediate annular part 7 of blank 5 is not held, and traverses circular clearance G and extend.In the view shown in Fig. 9, relative inwall instrument 70 has axially outwards moved with respect to relative central interior panel instrument 60 and outside center panel instrument 80 with 100 with outer wall instrument 90, so that axially drawing blank 5 is to form axially extended intermediate annular part 7, this intermediate annular part is traversed circular clearance G radially outward and axially outwards extends from central panel zone 5.

In Figure 10, relative inwall instrument 70 and outer wall instrument 90 axially upcountry moved with respect to relative central interior panel instrument 60 and outside center panel instrument 80 with 100 in case by axial compression intermediate annular part 7 with to its reformation.The radially outward curve that centre portion 7 has formed from the inclination perisporium 84 by outside center panel instrument 80 is out of shape radially outwardly, and the inside 7a of intermediate annular part 7 be forced to against inclination perisporium and around inclination perisporium rolling taking circumferential annular wall, comprise the shape of hollow toroid recess 66.Inner radial 7a thereby be placed in the annular recess R relative with circular clearance G.

With which reformation centre portion, 7a makes the blank material in center panel region and/or in panel wall enter extended state, and this is because described blank material forms on surface by efficiently " stretching, extension " at the periphery of central interior panel instrument 60.The material that traverses center panel region 6 of being followed in the time that blank is axially pressed central interior panel instrument 60 is schematically illustrated with arrow in being flowing in Figure 12.

The radial outer end of inner radial 7a presses the inner radial wall 72 of inwall instrument 70 and retrained by it.The remainder 7b of intermediate annular part 7 is by axial compression and because the flexure stress forming in material radially curves inwardly to form radially inner curve.The top of this radially inner curve and outer dog wall instrument 90 axially inwardly towards dog wall surface 92 contact, and be subject to its constraint and supporting.

In Figure 11, relative inwall instrument 70 has further axially upcountry moved to it is further reformed by further axial compression intermediate annular part 7 with respect to relative central interior panel instrument 60 and outside center panel instrument 80 with 100 with outer wall instrument 90.The remainder 7b of intermediate annular part 7 is from the further bending and radially inwardly distortion of described radially inner curve.Part rolling that circular clearance G extends is traversed with consistent with the shape of dog wall surface 92 against the dog wall surface 92 of outer dog instrument 90 in the top of described remainder 7b, thereby has formed the inner radial of dog wall 14.

Further axial compression has caused radially inner curve tensioning in remainder 7b, forms bending interconnecting gangway 50.Along with bending interconnecting gangway is by axially upcountry extruding of dog wall construction 92, this radially inner curve tensioning also forms bending interconnecting gangway, and forces blank material to enter in the hollow toroid recess 66 of central interior panel instrument 60 to make the tight rolling of described blank material to form annular flange 16 simultaneously.This tensioning of crimping makes its rolling in hollow toroid recess 66.

Figure 13 to 17 shows during forming can end 10 by axial compression blank 5 frock again at the amplification view of several different axial locations.To the formation method of can end 10 be described with reference to these accompanying drawings.

Initial step in described method comprises by the most peripheral part 8 of the center panel region 6 outward direction drawing vertically blank 5 with respect to blank carries out axial drawing to circular blank 5, to form from the periphery of central panel zone 6 radially outward and axial outward extending intermediate annular part 7.As shown in Figure 13, mainly axially outwards extended between center panel region 6 and most peripheral part 8 by the intermediate annular part 7 of drawing, described center panel region and most peripheral part are held respectively to contribute to axial drawing.Axially drawing process is arranged to curve outside initial radial is incorporated in the intermediate annular part 7 of being close to substantially with the periphery in center panel region 6.

As accessible from Figure 13, when the intermediate annular part 7 of drawing is during subsequently by axial compression, compressive force transmits straight the cardinal principle along intermediate annular part 7 wall section, and will tend to promote radially outer curve so that it is axially upcountry deformed on inclination perisporium 64, described inclination perisporium is that the axial profile of central interior panel instrument 60 becomes a surperficial part.This makes the radially penetrale 7a of intermediate annular part be rolled onto radially outwardly inclination perisporium 64 from the periphery of central panel zone 6 by tending to.Simultaneously, act on the obstruction of the most peripheral part 8 that the compressive force of intermediate annular part 7 end opposite is held, and be especially subject to the clamping of most peripheral part 8 dog wall part radially inwardly and axially inside rake hinder, the dog wall part of this clamping is compared the radially outward curve that approaches center panel region 6 and is difficult for being deformed.

Figure 14 to 17 shows the stage step by step of axial compression process, by means of described axial compression process, is then reformed by the intermediate annular part 7 of drawing.

As seen in Figure 14, in the time that most peripheral part 8 axially upcountry moves with respect to center panel region 6, the inner radial 7a of intermediate annular part 7 radially outward and is axially upcountry rolled onto on the formation surface of central interior panel instrument 60, and takes substantially the shape of the inclination perisporium 64 that comprises hollow toroid recess 66.

Due to curve radially outward further radially outward rolling be subject to the constraint of the inner radial wall 72 of inwall instrument 70, and because in the axial shape to the hollow toroid recess stopping in its radially outward edge place in outer dead centre 67, intermediate annular part 7 can not be further rolling radially outwardly.Take the shape of hollow toroid recess 66, moment of flexure produces in the inner radial 7a of intermediate annular part 7, and it forms the portion that radially curves inwardly in the remainder 7b of intermediate annular part 7 then.This makes (otherwise mainly axially extended) remainder 7b at remainder 7b radially inwardly bow of vicinity, center in axial direction.

With reference to Figure 15 and 16, further axial compression, by being axially upcountry moved further most peripheral part 8 with respect to center panel region 6, the inside curve of initial radial further radially inwardly subsides gradually at the axial centre place of remainder 7b.Then the upper end of remainder 7b is rolled onto radially outwardly on radially inside and axial outward-dipping formation surface and is subject to its axially upcountry extruding, and the dog wall surface 92 that traverses circular clearance G extension on this this formation surface by outer dog wall instrument 90 provides.

What meanwhile, radially curve inwardly portion axially makes the lower end of remainder 7b force the sweep having formed in hollow toroid recess 66 of the inner radial 7a of intermediate annular part 7 to be rolled to internal strain.This makes annular flange 16 be formed as crimping tight rolling, continuous bend.Crimping can have substantially constant curvature, and this curvature is limited by the radius of curvature of hollow toroid recess 66.

Further axial compression, together with rolling of material in hollow toroid recess 66, also makes radially inner curve tensioning become the curve with the radius of curvature reducing, and has formed bending interconnecting gangway 50.

As shown in Figure 17, by making annular flange 16 and bending interconnecting gangway 50 be tensioned to their final radiuss of curvature with respect to the axial upcountry final axial compression of mobile most peripheral part 8 in center panel region 6, and can not make these bead structure axially subside.The axial compression preferably some place before the portion that radially curves inwardly contacts with the inner radial 7a of intermediate annular part 7 stops, thereby forms the mouth m opening between the bending interconnecting gangway 50 of formed can end 10 and panel wall 20.Alternately, axial compression can continue until until these Surface Contacts, wherein mouth m closure.

It is evident that, graphic all axial compression (position from Figure 14 is to the position in Figure 17) realize by the single axial motion that makes the most peripheral part 8 of blank 5 and axially move inward with respect to center panel region 6, so that the intermediate annular part 7 to axial drawing is reformed in single operation.

Should be noted also that so these can form to have very little internal diameter by the blank of relative thin material, this utilizes traditional pressing tool is impossible because reforming process is used to form annular flange 16 and bending interconnecting gangway 50.Especially, in the case of the internal diameter of pressed part is very little, forming the required instrument of described pressed part can not use in the situation that blank material not being damaged.In contrast, the reforming method using in above this method allows not damage by thin stock material the annular flange and the contiguous bending interconnecting gangway that form tight rolling.

Can end 10 forms in the time completing this operation, although can carry out further procedure of processing as mentioned above in can end.

Go back to Figure 18, show according to the enlarged view crimping of another embodiment of can end of the present invention and dog wall part, that be similar to Fig. 4 A, the sidewall that wherein limits crimping mouth is parallel.

Particularly, except not polymerization of sidepiece and the straight wall section 40 and 49 of crimping mouth are connected to bending panel wall 20 and bending interconnecting gangway 50 each end 44 and 48 of bead wall 46 respectively, all features of can end are identical with the above-mentioned can end about Fig. 2 to 5.

However, center panel structure keeps substantially the outwards shape of protuberance, and crimping 16 extends radially outwardly from the inner peripheral of dog wall construction.

Figure 19 shows according to the enlarged view crimping of another embodiment of can end of the present invention and dog wall part, that be similar to Fig. 4 A, and the sidewall that wherein limits crimping mouth is bifurcated.

In this example, again in panel wall, straight wall section 40 is set between bending panel wall 20 and the inner 44 of bead wall 4.On the outside of crimping 16, the outer end of bead wall 46 is connected directly to bending transition portion area 50 at flex point place.Straight wall section 40 and the bending interconnecting gangway 50 outside fork from crimping 16 towards can end.

Meanwhile, center panel structure keeps substantially the outwards shape of protuberance, and crimping 16 extends radially outwardly from the inner peripheral of dog wall construction.

Figure 20 shows according to the enlarged view crimping of another embodiment of can end of the present invention and dog wall part, that be similar to equally Fig. 4 A, and wherein panel wall is included in the straight section 40 substantially between center panel 18 and crimping 16.On the opposition side of crimping, bending interconnecting gangway 50 is identical with the embodiment of Fig. 2 to 5 substantially with annular flange 16.

Again, center panel structure keeps substantially the outwards shape of protuberance, and crimping 16 extends radially outwardly from the inner peripheral of dog wall construction.The embodiment of Figure 20 also may benefit from and under pressure, face wooden partition section 40 when deflection directly when can end and form and contact with bending interconnecting gangway 50, thereby can obtain the failure behaviour that can end has been improved.

This application file is attached to the content of annex 1 and disclosure in its entirety, described annex comprises 69 page specification sheets, claims and the accompanying drawings relevant to same application, and specification sheets, claims and accompanying drawing that above content is the application by reference are incorporated into this.

Claims

1. a can end, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises:

Center panel;

Panel wall, described panel wall axially inwardly and is radially outwardly extended around described center panel and from described center panel circlewise;

Annular dog wall construction, described dog wall construction radially inwardly and axially upcountry extends from described bound fraction; And

Annular flange, described annular flange is connected between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction, and described annular flange is recessed with respect to the outside of can end and extends radially outwardly at least in part with respect to the radially inward edge of described dog wall construction

Wherein, the wall part adjacent with outer end with the inner of hollow toroid crimping formed crimping mouth, and described crimping mouth is opened towards the outside of can end.

2. can end as claimed in claim 1, is characterized in that, described crimping mouth is the point of the wall part close approximation adjacent with outer end with the inner of hollow toroid crimping.

3. can end as claimed in claim 1 or 2, is characterized in that, described annular flange presents following section profile, and described section profile is through connecing as circle in substantially in the plane of central axis can end, that comprise can end.

4. can end as claimed in claim 3, is characterized in that, described annular flange is along opening to described outside to inside and axial outside direction from the interior diameter connecing.

5. can end as claimed in claim 1, it is characterized in that, through in the plane of central axis can end, that comprise can end, the adjacent wall part that forms described crimping mouth is parallel or towards the outside of can end from the inner and the outer end fork of annular flange.

6. a can end, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises:

Center panel;

Wherein, described annular flange presents following section profile, and described section profile is through connecing as circle in substantially in the plane of central axis can end, that comprise can end, and

Wherein, the wall part adjacent with outer end with the inner of annular flange formed crimping mouth, described crimping mouth about the interior circular shaft connecing to outwards and radially inwardly installing.

7. can end as claimed in claim 6, is characterized in that, described crimping mouth is the point of the close approximation of the adjacent wall part at the center of close described inscribed circle.

8. as can end in any one of the preceding claims wherein, it is characterized in that, described panel wall is protruding in bending with respect to can end outside,

Wherein said dog wall construction comprises annular dog wall, described annular dog wall radially inwardly and axially upcountry extends, and the radial inner end of annular dog wall is connected with annular flange via following part, this part is with respect to protruding in bending and do not touch the outer surface of described panel wall outside can end, and

Wherein said can end is configured to, and in the time that described can end is bonded to interior pressure in tank body and tank and increases to cause that can end outwards expands, protrudingly will dock to bending part with the protruding of radial inner end at annular dog wall to bending panel wall.

9. as can end in any one of the preceding claims wherein, it is characterized in that, described annular flange presents following section profile, described section profile is through having bead wall in the plane of central axis can end, that comprise can end, described bead wall is recessed continuously substantially to be spent through more than 180 to bending, and

Wherein said recessed bead wall stops with the angle that is no less than 45 degree with respect to the central axis of can end in its outer end, described angle is measured as follows in this section, and the directional survey of advancing to dog wall from center panel from the central axis of direction outwardly along bead wall is to the tangent line in recessed curve radial outer end of panel wall.

10. can end as claimed in claim 9, it is characterized in that, described panel wall incorporates the recessed curve of annular flange at its radially outward edge place, and wherein, through in the described plane of can end, can end wall between convex surface wooden partition and hollow toroid crimping, the tangent line at point of transition place is measured in described plane along radially outer direction becomes to be no more than the angle of 150 degree with outer axial direction.

11. can end as described in any one in claim 1 to 8, it is characterized in that, described panel wall is protruding in bending with respect to the outside of can end, and incorporate the recessed curve of annular flange at the radially outward edge place of panel wall, described recessed curve has maintained the curvature through the constant of more than 180 degree, and wherein, through can end, comprise in the plane of central axis of can end, can end wall between convex surface wooden partition and hollow toroid crimping, the tangent line at point of transition place is measured in described plane along radially outer direction becomes to be no more than the angle of 150 degree with outer axial direction.

12. can end as described in claim 9 or 11, is characterized in that, described annular flange substantially continuous bend through more than 225 degree.

13. as claim 10 or 11 or as quoted the can end as described in their claim 12, it is characterized in that, the tangent line at described point of transition of can end wall is no more than 135 degree with the described angle that axially outward direction becomes.

14. 1 kinds of can end, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises:

Center panel;

Wherein, described panel wall and described annular flange are by reforming and be integrally formed blank, press central interior panel instrument by described blank, described central interior panel instrument has the surface axially inwardly and radially outward tilting of extending from central panel zone, and described central interior panel instrument is provided with bending annular recess toward the outer side at the radially outward edge of its periphery, and the annular recess of described bending forms described annular flange thus.

15. 1 kinds of can end, it is for following tank, the content of described tank for pressurizeing, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of described tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises:

Center panel;

Wherein, the material of can end is not folded or contact with himself between the radially outward edge of described panel wall and the radially inward edge of described dog wall construction.

16. according to the can end described in aforementioned claim any one, is also included in the lid, label, mark, draw ring or other material that in annular flange, arrange.

The manufacture method of 17. 1 kinds of can end, described method comprises:

In the following manner blank is reformed, the axially extended annular section around described blank center panel region of blank material is compressed, at least inner radial flow of described annular section is become and take substantially the shape at the annular recess arranging with that side of the initial axially extended opposite direction of described annular section vertically of center panel; And

Also comprise and utilize at least center panel region of described blank under tension force under axial compression, described blank to be reformed.

18. methods as claimed in claim 17, it is characterized in that, blank is reformed and comprised against annular section described in the axial compression of ring tool surface, described ring tool surface extends radially outwardly from described center panel region and is upwards bent away from and ends at the hollow toroid recess of the back of the body towards described annular section primitive axis to bearing of trend from the initial axially extended axis of orientation of annular section of described blank, with at least radially penetralia that makes described annular section around ring tool surface the radially outward edge rolling radially outwardly from central panel zone, thereby take substantially the shape on described ring tool surface.

19. methods as described in claim 17 or 18, is characterized in that, described annular recess comprises annular recess at its radially outward edge place, and described annular recess axially outwardly and be configured to promote to form axially the outwards recessed and bead portion that extends radially outwardly.

20. methods as described in claim 17,18 or 19, it is characterized in that, described in axial compression, blank is to make at least inner radial flow of described annular section become and roughly take the shape of described annular recess, above-mentioned behavior is to having introduced the inside curve of initial radial in the remainder of annular section, and the remainder of described annular section otherwise axially extends to most peripheral part blank, that be kept to contribute to described axial compression from the radially outward edge of annular recess.

21. methods as claimed in claim 20, is characterized in that, blank is reformed and comprised that blank described in further axial compression is to make the inside further radially inwardly distortion of curve of initial radial in the remainder of described annular section.

22. methods as claimed in claim 21, it is characterized in that, further described in axial compression, blank comprises by the axial outside of the remainder of annular section described in outer dog wall tool support, thereby radially the axial outer end of aduncate remainder is formed as at least a portion of the dog wall of can end at least in part by described further axial compression.

23. methods as described in any one in claim 17 to 22, is characterized in that, all reformations and further reforming complete by the single action of the annular section of axial compression and the described blank of reforming little by little.

The manufacture method of 24. 1 kinds of can end, described method comprises:

In the following manner blank is reformed, the axially extended annular section around described blank center panel region of blank material is compressed against ring tool surface, described ring tool surface extends radially outwardly from described center panel region and is axially bent away from the initial axially extended direction of annular section of described blank and ends in the hollow toroid recess of the back of the body towards described annular section primitive axis to bearing of trend, with at least radially penetralia that makes described annular section around ring tool surface the radially outward edge rolling radially outwardly from central panel zone, thereby take substantially the shape on described ring tool surface.

25. methods as described in any one in claim 17 to 24, further comprise blank described in axial drawing, described drawing is carried out in the following way, the i.e. most peripheral part along blank described in axial outward direction drawing with respect to described blank center panel region, to be drawn into the intermediate annular part of described blank to make it radially outward and axially outwards extend to most peripheral part as described axially extended annular section from described center panel region.

26. methods as claimed in claim 25, is characterized in that, axially described in drawing blank near this blank center panel region by initial radial outside bending introduce in the annular section of described blank.

27. 1 kinds of central interior panel instruments, its for the inner side of pressing blank in the manufacture of can end blank is reformed against described instrument, described instrument comprise axially outwards towards center panel region and the periphery surface of inclination, the periphery surface of described inclination from described center panel region axially inwardly and extend radially outwardly and its outer radial periphery edge end at outward direction vertically towards hollow toroid recess in.

28. instruments as claimed in claim 27, is characterized in that, the periphery surface of described inclination radially outward direction is axially upcountry bent away from described center panel region gradually to be formed slopely described in general as protuberance bulge loop.

29. instruments as described in claim 27 or 28, is characterized in that, described hollow toroid recess by recessed to ground bending.

30. 1 kinds of frocks for the manufacture of can end, described can end waits to be bonded to an axial end portion for the tank body of the tank of pressurized content, and described frock comprises:

Central interior panel instrument, it is used to form the inner corresponding inner side of can end and tank, and is arranged in and in inwall instrument, installs with one heart so that the radially inner side wall of contiguous described inwall instrument substantially,

Wherein said central interior panel instrument has periphery surface, the described periphery surface axis of orientation radially outside from the center panel region of described central interior panel instrument is to upcountry tilting, to make described periphery surface limit the axial inside annular recess in described center panel region together with the madial wall of described inwall instrument, and

Wherein said annular recess is configured to during the reforming process that blank is axially pressed to described central interior panel instrument, promote to form radially outward extending crimping in can end.

31. frocks as claimed in claim 30, is characterized in that, described periphery surface traverses at least 25% the tilting with respect to axial direction of radial width of the described annular recess extending radially outwardly from described center panel region.

32. frocks as described in claim 30 or 31, it is characterized in that, axially outwards towards hollow toroid recess form at the radially outward edge place of the periphery surface of described central interior panel instrument, thereby during the reforming process that blank is axially pressed to described central interior panel instrument, promote the described formation of the crimping extending radially outwardly together with the madial wall of described inwall instrument.

33. frocks as described in claim 30,31 or 32, is characterized in that, described periphery surface radially outward direction be axially upcountry bent away from gradually described center panel region with will described in be formed slopely as protuberance bulge loop.

34. 1 kinds of frocks for the manufacture of can end, described can end treats that by dual seaming described frock comprises to an axial end portion of the tank body of tank:

In-house tool, described in-house tool is installed for forming can end and be arranged on the axial inner side of external tool on the sidepiece corresponding with the inner side of tank, and described external tool, for form can end on the sidepiece corresponding with the outside of tank, comprising:

Central interior panel instrument;

Inwall instrument, described inwall instrument around and substantially contiguous described central interior panel instrument arrange with one heart;

Outside center panel instrument, it is relative with described central interior panel instrument; And

At least one outer wall instrument, it is relative with described inwall instrument and around arranging with one heart with contiguous described outside center panel instrument substantially substantially,

Wherein, relative inwall instrument can move axially with respect to relative central interior panel instrument and outside center panel instrument with outer wall instrument,

Wherein, described outside center panel instrument has less external diameter than the internal diameter of the inner radial wall of described inwall instrument, described outside center panel instrument can dispose with one heart to reserve the radially circular clearance around described outside center panel instrument at least in part in described inwall instrument, and

Wherein, described central interior panel instrument comprises circumferential annular surface, the described circumferential annular surface axis of orientation radially outside around the center panel region of described inwall center panel instrument and from described center panel region is to upcountry extending, described circumferential annular surface defines the annular recess axially extending internally from the center panel region of described central interior panel instrument together with the inner radial wall of described inwall instrument, described annular recess is relative substantially with described circular clearance.

35. frocks as claimed in claim 34, it is characterized in that, described circumferential annular surface ends in annular recess at its radial outer end, and this annular recess is configured to during the reforming process that blank is axially pressed to described central interior panel instrument, promote to form the recess extending radially outwardly.

36. frocks as described in claim 34 or 35, it is characterized in that, at least one outer wall instrument comprises dog wall instrument, described dog wall instrument around and substantially contiguous described outside center panel instrument arrange with one heart, and traverse described circular clearance and the relatively extension substantially of described annular recess.

37. frocks as claimed in claim 36, is characterized in that, described dog wall instrument comprise relative with described annular recess axially inwardly towards annular surface, described inwardly towards surface along radially outer axis of orientation to outwards tilting.

38. 1 kinds of tanks for pressurized content, it comprises tank body, and described tank body has the can end of its one axial end of being bonded to, and described can end is selected from the group that comprises following can end:

Can end as described in any one in claim 1 to 16;

The can end of manufacturing by the method as described in any one in claim 17 to 26;

The can end that uses the instrument as described in any one in claim 27 to 29 to make;

The can end that uses the frock as described in any one in claim 30 to 37 to make.

39. 1 kinds of can end manufacturing equipments, it is configured to manufacture can end according to claim 17 to the method described in any one in 26.

40. equipment as claimed in claim 39, it comprises:

Instrument as described in any one in claim 27 to 29; And/or

Frock as described in any one in claim 30 to 37.

41. 1 kinds of can end manufacturing equipments, it comprises:

Instrument as described in any one in claim 27 to 29; And/or

Frock as described in any one in claim 30 to 37.

42. 1 kinds of can end, described can end is configured to be bonded to by the bound fraction of circumferential annular an axial end portion of the tank body of tank, and described can end have be configured to from described tank outwards towards outside and be configured to the inwardly inner side in tank, described can end comprises:

Loop configuration, described loop configuration is recessed with respect to the outside of described can end and is connected to following structure:

Described loop configuration is radially with interior center panel structure; With

Dog wall construction, described dog wall construction circlewise around described loop configuration and from

Described loop configuration axially outwards and is radially outwardly extended; And

Lid, label, mark or draw ring, or other material arrange at least in part in hollow toroid structure.

43. can end as claimed in claim 42, it is characterized in that, described can end is for following tank, the content of described tank for pressurizeing, and described can end is arranged so that in the time that can end is bonded to interior pressure in tank body and tank and increases, can end will distortion to make wall part in the every side of described loop configuration near the lid, label, mark, draw ring or other material that arrange in hollow toroid structure.

44. can end as described in claim 42 or 43, is characterized in that, the opening that described lid, label, mark or draw ring surround can end is substantially to maintain the aseptic and sanitary condition on the besieged outer surface of tank.

45. can end as described in claim 42,43 or 44, it is characterized in that, the hermetically-sealed construction again of the opening of described lid, label, mark or draw ring and can end and/or can end operates or forms a part for opening for can end and/or a part for the hermetically-sealed construction again of can end altogether.

46. can end as described in claim 42,43,44 or 45, is characterized in that, described lid, label, mark, draw ring or other material arrange to provide strengthening or control deflection and/or the failure behaviour of can end in described hollow toroid structure.