CN104015971A - Insert for drum closure - Google Patents
Insert for drum closure Download PDFInfo
- Publication number
- CN104015971A CN104015971A CN201410067643.8A CN201410067643A CN104015971A CN 104015971 A CN104015971 A CN 104015971A CN 201410067643 A CN201410067643 A CN 201410067643A CN 104015971 A CN104015971 A CN 104015971A
- Authority
- CN
- China
- Prior art keywords
- insert
- flange
- aforementioned
- depression
- neck
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
- B65D39/08—Threaded or like closure members secured by rotation; Bushes therefor
- B65D39/082—Bung-rings and bungs for bung-holes
- B65D39/084—Separated bung-rings made by one element
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
The present invention relates to an insert (10) for a drum closure. The insert (10) comprises a flange (1) and a cylindrical collar (2), said collar comprising a lower sleeve portion (3) for inserting a plug (4), and an upper lip portion (5) to be beaded about an edge (12) of a cylindrical neck (11) surrounding a drum opening (13), said flange (1) extending radially outward from a lower end of said sleeve portion (3), characterized in that an upper surface (6) of said flange adjacent said collar (2) comprises a circumferentially extending depression (7).
Description
Technical field
The present invention relates to a kind of insert for bung, wherein, this insert comprises flange and cylindrical shape neck ring, described neck ring comprise for insert plug lower sleeve portion and will be around the upper lip at circle tube neck part edge, this circle tube neck part is around bucket opening, and described flange extends radially outwardly from the lower end of described sleeve part.The insert of the type is generally used for steel drum, and this steel drum is for holding oil, chemical liquid and such as other liquid of water, but is not limited to above-mentioned liquid.
Background technology
Conventionally, bucket has a circular open, this circular open by can form from a part of punching press of bucket wall or compacting, more or less cylindrical shape or conical neck around.Bucket can have any shape, has polygon or columnar cross-sectional plane, is the shape of the cylindrical shape bucket with smooth circular end face and bottom surface the most frequently usedly.This opening can be formed in one of end face and bottom surface and/or be formed in cylindrical wall.
Being dimensioned in the neck that is arranged on barrel opening of the neck ring of insert, and flange neighbour is butted on a barrel wall inner side, neighbour is butted on the recess of the receiving flange of barrel wall more accurately.When insert being installed on to barrel opening, neck ring is inserted in the neck of barrel opening, and flange arrangement is in the recess of bucket wall, and presses around the inwall of the female portion of described neck.This recess has non-circular, the most common octagonal periphery, and flange is also like this, thereby once flange is fit in recess, and insert can not be around the rotation of insert axis, because flange is the form with the non-circular perimeter lock fit of recessed wall portion.
When insert being arranged in barrel opening, from outside at neck around and press blanked part or mould towards insert, and flange is pressed against a barrel wall from inner side, thereby the interconnecting gangway of the smooth curved of the recessed barrel of wall portion from flange and neck top is pressed to insert.Thus, the tightening seal washer also immediately arranging above flange around sleeve part is compressed, and " stream " enters between flange and bucket wall and the gap retaining between cylindrical sleeve portion and neck.
Such as at EP0 614 434 B1 and US-A-4,706, in the convering system of 836 prior art, the outside face that the upper surface of flange is approximately perpendicular to sleeve part extends, and this still can have chamfering or sharp transitions more or less rounded shapes, between these surfaces that 1 millimeter of little radius of curvature of common ratio is little in practice.
This insert is fixed in the neck of barrel opening conventionally in the following way,, upper lip by neck ring is around the upper limb crimping of neck, and packing ring is compressed on the one hand between described neck and adjacent barrel wall part and is compressed on the other hand between the sleeve part and flange of insert simultaneously.
Under non-compressed state, tightening seal washer can have the circular or L shaped cross-sectional plane of rectangle.But, when applying enough pressure between the neck at insert and bucket and adjacent wall, the tightening seal washer that can apply will change its shape of cross section, and partly " flow to " or creep in the gap between insert and barrel wall, wherein, most of packing ring creep is between the upper surface of flange and the relative part of bucket wall, and only more the sealing member of fraction by extend to insert sleeve part and barrel neck between hollow circle tube gap in.After fill bucket, insert opening can be closed by thread plug part.
This can be enough to have tight connection the between insert and bucket under normal condition, but, in use, bucket stands to mishandle sometimes, for example, when they are stacked in top of each other, or top side is when drop down, wherein significantly pressure or strike may act on the top of insert, and wherein, lid and especially insert are inwardly pressed, thereby around the bucket wall distortion of insert, and the pressure between flange and adjacent wall part and the pressure acting between them are released.Then, if being arranged between flange and adjacent wall part and only, the main portion of sealing function extends in the cylindrical shape gap of least part packing ring between sleeve and neck, being sealed and matched and may losing between insert and bucket opening, and liquid may leak between insert and the neck of bucket.
Taken several steps and dealt with this problem, the structure such as two independent seal arrangement in Fig. 1 to 3 embodiment of EP 0 614 434 on top of each other or such as the L shaped cross-sectional plane of sealing member in Fig. 5 of EP 0 614 434 and 6 embodiment.But these are attempted neither one and are entirely satisfactory.Provide a plurality of packing rings certainly to operate more trouble, and require larger different packing ring stocks.And, provide two packing rings of being made by different materials to relate to remarkable shortcoming, because this has reduced the selection of necessary while and the Available Material of the liquid containing material compatibility of bucket.And, more effort and appropriate operation during the packing ring with the cross-sectional plane of customised design causes producing, because they must apply along specific direction, thereby, when mal applies, increasing be there is to the tendency of leaking.
Summary of the invention
According to prior art, the object of this invention is to provide a kind of insert, it is for guaranteeing better sealing function by having the single tightening seal washer of standard shape of cross section.
According to the present invention, this object realizes in the following way: the upper surface adjacent with sleeve part of flange comprises the depression of circumferential extension.This depression has unexpected effect,, when the flange towards insert and neck ring or sleeve are pressed neck wall and adjacent wall part, the resistance to flow of the mobile or creep for the gap between flange and wall part of packing ring increases, thereby packing ring flow to more significantly the sleeve part of insert and bucket in the hollow circle tube gap between the neck of bucket opening, rather than creep is in the gap between flange and barrel wall.Correspondingly, because this cylindrical shape gap is better filled into higher degree, even if near bucket wall distortion insert does not cause coordinating of packing ring disengagement and sleeve part and neck yet, maintain sealing function.
In addition, this does not need specific packing ring shape of cross section, and packing ring shape of cross section can be rectangle or the simple circular cross-sectional shape of standard, and does not require around sleeve part and apply more than one packing ring.
In order further to improve the obvious creep of tightening seal washer, arrive the effect in the cylindrical shape gap between sleeve part and neck, depression is by limiting as lower surface, this surperficial cross-sectional plane be smooth curved and/or by with 45 degree at the most and preferably 30 degree or the relative angle straight portion connected to each other that is less than 30 degree form.
Particularly, in cross-sectional plane, this depression should comprise towards the outside face of sleeve part only cuts sth. askew or the interconnecting gangway of rounding.In general, in order to improve tightening seal washer needed movement or mobile when compressing, depression should have shallow slot form.
Groove or depression also below mode limit.The bowlder of any in considering the cross-sectional plane of (circumferentially extending) depression and at least 3 adjacent straight or sweeps that application is tangential on this depression, minimum profile curvature radius should be at least 0.5mm, 1.5mm at least preferably, and 2mm at least more preferably.Certainly, these figure also depend on the size of bung and the cross-sectional area of tightening seal washer.That is, the lid of smaller szie (this radius of curvature of the groove that the lid of 3/4 ' ' lid can have than 2 ' ' is less).The shape of cross section of an example of this depression is by having radius R (>0, sweep 5mm) limits, this sweep tangentially starts and extends the angle of being approximately a bit larger tham 90 ° from the cylindrical wall (neck ring) of insert, smoothly (tangentially) be transitioned into straight flat, this straight flat angle [alpha] (10 to 20 degree raise) that raises a little, and the flat horizontal radially outer of integrating with flange divides, thus, according to the pitch of the flat of this rising and radially extension, smooth groove is defined as to have the degree of depth between about 0.6mm and 1.5mm.
Preferably, when from the summit of depression when starting and radially outward advancing from this summit, the surface of depression divides the maximum angle of inclination should be less than 45 ° with respect to the radially outer of flange, and preferably from 10 ° within the scope of 30 °.From the summit of depression, towards this rising of the radially outer of flange, for packing ring, resist towards radially outward partly mobile enough resistances are provided, and still have the possibility that forms flange and depression by simple push action.
In one embodiment of the present of invention, when from by flange radially outward part limit level measurement time, the degree of depth of depression should be less than 4mm but be decidedly superior to 0.3mm, preferably, in 0.5mm to 2.5mm scope, 0.6 to 1.5mm particularly.In one embodiment, while measuring from the wall of sleeve part, the width of corresponding depression should be greater than 3mm and be less than 12mm, common about 5mm.
In one embodiment of the invention, the flange portion radially outward extending along the plane of the axis perpendicular to lid from described depression has planar annular shape, particularly flat rectangular cross-sectional plane.
In the birds-eye view of insert (that is, while seeing along its axis), the periphery of flange can have polygonal shape, preferably octagon-shaped.
In addition, in one embodiment of the invention, flange has roughly thickness uniformly, depression forms by forging and stamping or punching press planar annular flange, such as by the radially outer of flange is clamped between the claw of two positioned opposite and press downwards sleeve and flange radially inwardly part form, thus the radius of depression and gradient by the material parameter of flange and neck ring, wall thickness with and the roughly decision such as geometric configuration.Flange also can form between corresponding blanked part and mould, to obtain the shape of cross section of the good restriction of depression.
In order to insert thread plug part, sleeve part can comprise negative thread, and the lip of crimping around the upper limb of the neck around bucket opening can be had to the thickness more much smaller than the thickness of sleeve part.Particularly, this lip can have 1mm ± 0, the wall thickness of 5mm magnitude, and sleeve part is than between lip thick 50 and 100%.
Insert also can be provided with packing ring, wherein, provides the sealing function of improvement, and single ring washer is just enough.Corresponding packing ring should be made by pliable and tough, resilient plastic material, and plastic material be comprise in the material group of EPDM, resin and nitrile rubber resin two or more one of or combination.
Accompanying drawing explanation
In description below in conjunction with the preferred embodiment of accompanying drawing, can obtain further advantage and feature, in accompanying drawing:
Fig. 1 is the axial cutaway view cuing open according to the embodiment of bung insert of the present invention,
Fig. 2 is the cutaway view amplifying with the summary of lower member:
(a) according to the insert of prior art,
(b) according to insert of the present invention,
(c) according to another embodiment of insert of the present invention,
Fig. 3 is another cutaway view containing with good grounds prior art (a) and the packing ring that (b) applies according to the present invention,
When Fig. 4 illustrates in the opening that is applied in barrel wall, (a) according to the bung of prior art with (b) correspond to the contrast of bung of the present invention.
The specific embodiment
Fig. 1 illustrates the axial cross section that cutd open insert 10, and this insert 10 consists of general cylindrical shape neck ring 2 and the peripheral flange 1 of extending around the periphery of the lower edge of neck ring 2 substantially.Neck ring 2 consists of two parts again, i.e. upper lip 5 and the lower sleeve portion adjacent with flange 1, and this flange has the wall thicker than upper lip 5, and upper lip 5 is intended to the upper limb crimping around bucket neck, as by respectively at shown in Figure 4 and 5.
The periphery of flange 1 can be polygonal, especially octagonal.
The lip 5 of neck ring 2 is around the upper limb crimping of bucket neck, insert is firmly attached to a barrel wall in final installation site.
Sleeve part 3 is provided with for being filled with any liquid or roughly receiving the cloudy negative thread of thread plug part 4 after fluent material.
As can be seen, flange consists of outer planar annular part 8 and the interior bead portion 9 that forms depression 7 again, and this depression 7 has shallow slot shape.
The cross-sectional plane of the upper surface 6 in depression 7 can be smooth curved, comprises 1mm, preferably approximately 2 minimum profile curvature radius to 3mm.When the cross-sectional plane in Fig. 1 is seen, depression 7 surface also can consist of slightly angled a plurality of straight line portioies relative to each other, rather than smooth curved, wherein, and 45 ° and be preferably less than 30 ° at the most of the angles between adjacent part.Certainly, the cross-sectional plane of depression 7 also can comprise sweep and straight portion simultaneously, shown in Fig. 2 b and 2c.Although the cross-sectional plane of the depression in Fig. 2 b consists of the sweep replacing and straight portion, but the shape of cross section in the embodiment of Fig. 2 c is limited by the sweep with radius R (about 2.5mm), this sweep is approximately slightly larger than 90 ° (approximately 100 ° to 110 ° more accurately from cylindrical wall (neck ring) extension of insert, such as 105 °) angle, be transitioned into smoothly straight flat b, this straight flat slightly raises, and (10 ° to 20 ° degree increase angle [alpha], such as 15 °), and merge in the flat horizontal radially outer of flange, thus, according to the pitch of the flat of this increase and elongation radially, smooth groove is defined as to have the depth d between about 0.6mm and 1.5mm.The width w of this depression can be 3 to 8mm, preferably about 5mm.
Therefore, the outer planar annular part 8 of flange 1 raises above the bottom of depression 7, and as already mentioned, when the surface 6 from flange portion 8 is measured, the degree of depth of depression 7 can be in 0.5 to 2mm magnitude.On the contrary, and as seen in Fig. 2 a, the insert 10 ' of the sleeve 3 that comprises roughly the same type and the prior art of lip 5 have plane, planar annular flange, and any depression adjacent with sleeve part not.Can be for slightly cutting sth. askew or rounding towards the transition of sleeve part from flange.But all the other upper surfaces of flange 1 ' are completely flat.On the contrary, as seen from Fig. 2 b, from flange, towards the transition of sleeve part, can be approximately identical, comprise 45 ° of oblique angles or the interconnecting gangway of smooth curved preferably, still, in remainder, flange comprises depression 7, this depression 7 next-door neighbours towards the interconnecting gangway of sleeve part 3.Generally, depression 7 has roughly shallow slot shape, and when when and then the sleeve part above described depression 7 applies packing ring, this still has significant effect.
For better explain difference of the present invention and effect, Fig. 3 and Fig. 4 illustrate around sleeve part be equipped with the prior art insert of two different packing rings in top of each other with according to the contrast of insert of the present invention and packing ring.In Fig. 3 a, the packing ring of prior-art devices is to have two seal ring forms setting of rectangular cross section.Even there are different sizes and made by different materials near bucket insert still provides suitable sealing function, packing ring during areal deformation.But this may preserve a large amount of dissimilar packing rings with different sizes in warehouse, with tackle sealing member must with the inclusion of bucket compatible situation mutually, can have still must be by two different performances that sealing member is satisfied for the inclusion of bucket simultaneously.
On the contrary, the present invention only requires single packing ring, and this single packing ring is placed in depression 7 or immediately in depression 7 at least in part, and around the bottom of sleeve part 3.
During use, insert is resisted against the inner side of barrel wall 12 and places, as shown in Figure 4, thereby, sleeve part with respect to the neck 11 of bucket wall substantially concentric be accepted, and flange 1 is received within the depression being shaped accordingly, this depression is arranged in barrel wall around the periphery of neck 11, wherein, the lip that originally extends beyond the upper limb of circle tube neck part 11 is crimped and is folded back around the upper limb of neck 11, as Fig. 4 a and 4b illustrate respectively.
For final installation and sealing, provide corresponding instrument press neck 11 and particularly from neck 11, towards the wall 12 extending in parallel with flange 1 transition portion that forms depression bucket wall, towards packing ring, pressed, so that packing ring (a plurality of packing ring) is compressed, and start to flow to and creep in the gap of still staying respectively between neck 11 and sleeve part 3 and between wall part 12 and flange 1.
But according to prior art, the main portion of lower gasket 20 ' will be stayed between flange 1 and wall 12, this just requires to arrange the second packing ring 21 ' on the top of packing ring 20 '.
On the contrary, due to the depression 7 in the upper side of flange 1 according to the present invention, and the packing ring 20 of packing ring 20 ' same type there is stronger distortion and flow upward to or creep to the trend in the cylindrical gap between neck 11 and sleeve part 3, and only the packing ring 20 of least part is stayed between flange 1 and wall part 12.
This means, even if only use single packing ring 20, also the part in the gap between neck 11 and sleeve part 3 of upwards always extending to by packing ring 20 guarantees and guarantees most of sealing function, thereby the sealing function that any distortion (contrast Fig. 3 and 6 in EP 0 614 434) of bucket wall obtains the remainder that can not affect by packing ring, any distortion major effect of bucket wall is coordinating between packing ring 20 and wall 12 and between flange 1 and the packing ring extending between it respectively.
Therefore,, due to depression 7, even under extreme conditions and when bucket wall 12 is significantly out of shape, also by single packing ring, maintain sealing function insert 10 near.In addition, by requiring, do not use dissimilar packing ring or in warehouse, store a plurality of packing rings and apply packing ring around sleeve part 3.Therefore, there is this newtype insert saving cost that is positioned at upper surface and flange adjacent with sleeve part 3 and that extend around sleeve part, and improve the compactness of sealing function.
For original open, should note any feature that can be obtained by those skilled in the art from these specification, drawings and the claims, even if it is only described in conjunction with further feature, can combine separately and with any one combination in any of feature disclosed herein or feature group, unless get rid of clearly or engineering factor can cause such combination can not or meaningless.Each feature can thinkable any combination clearly discussion be omitted, just in order to make specification sheets and claims for purpose of brevity and readable.
Claims (16)
1. the insert for bung (10), described insert (10) comprises flange (1) and cylindrical shape neck ring (2), described neck ring comprises lower sleeve portion (3) and upper lip (5), described lower sleeve portion (3) is for inserting plug (4), described upper lip (5) will be at the edge (12) of the circle tube neck part around bucket opening (13) (11) crimping around, described flange (1) extends radially outwardly from the lower end of described sleeve part (3), it is characterized in that, the upper surface adjacent to described neck ring (2) of described flange (6) comprises the depression (7) of circumferential extension.
2. insert as claimed in claim 1, is characterized in that, described depression (7) is limited by a surface, the cross-sectional plane on described surface be smooth curved and/or by forming with 45 relative angle straight portion connected to each other of spending at the most.
3. the insert as described in aforementioned claim any one, is characterized in that, the cross-sectional plane of described depression has the interconnecting gangway that omits inclination or chamfering towards lower sleeve portion.
4. the insert as described in aforementioned claim any one, is characterized in that, any the circle being tangential at least three adjacent straight or sweeps has at least 1mm, preferably the minimum profile curvature radius of 1.5mm at least.
5. the insert as described in aforementioned claim any one, is characterized in that, described depression is shallow slot (8) form.
6. the insert as described in aforementioned claim any one, it is characterized in that, in the cross-sectional plane of described depression and from the summit of described depression radially outward, the maximum angle that the surface of described depression tilts with respect to the plane perpendicular to insert Axis Extension is less than 45 °, is preferably less than 30 °.
7. the insert as described in aforementioned claim, is characterized in that, the degree of depth of described depression is less than 4mm and is greater than 0.5mm, preferably about 1.5mm.
8. the insert as described in aforementioned claim any one, is characterized in that, the width of described depression is greater than 4mm and is less than 12mm, and particularly approximately 5 to 6mm.
9. the insert as described in aforementioned claim any one, is characterized in that, has planar annular shape, particularly flat rectangular cross-sectional plane from the radially outer flange portion of described depression.
10. the insert as described in aforementioned claim any one, is characterized in that, in birds-eye view, the periphery of flange has polygonal shape, preferably octagon-shaped.
11. inserts as described in aforementioned claim any one, it is characterized in that, described flange has roughly thickness uniformly, described depression has planar annular radially outer and interior crimping flange by planar annular flange being forged between blanked part and mould forms, thereby forms shallow slot in the upper surface of flange.
12. inserts as described in aforementioned claim any one, is characterized in that, described sleeve part comprises negative thread.
13. inserts as described in aforementioned claim any one, is characterized in that, the wall thickness of described lip is less than the wall thickness of described sleeve part.
14. inserts as described in aforementioned claim any one, is characterized in that, at described neck ring, are provided with single ring washer around.
15. inserts as described in aforementioned claim any one, is characterized in that, described packing ring is made by pliable and tough, resilient plastic material.
16. inserts as described in aforementioned claim any one, is characterized in that, plastic material be comprise in the material group of EPDM, resin and nitrile rubber resin two or more one of or combination.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13157302.4A EP2772449A1 (en) | 2013-02-28 | 2013-02-28 | Insert for a drum closure |
| EP13157302.4 | 2013-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104015971A true CN104015971A (en) | 2014-09-03 |
Family
ID=47779932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410067643.8A Pending CN104015971A (en) | 2013-02-28 | 2014-02-26 | Insert for drum closure |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2772449A1 (en) |
| CN (1) | CN104015971A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3208775A (en) * | 1961-05-10 | 1965-09-28 | Leer Ind Ltd Van | Seal for bung bushings |
| GB1392603A (en) * | 1971-08-05 | 1975-04-30 | Drums Ltd | Containers |
| US4706836A (en) * | 1987-01-23 | 1987-11-17 | Allen-Stevens Drum Accessories Corp. | Leak-resistant drum seals |
| CN1051323A (en) * | 1988-06-13 | 1991-05-15 | 罗伯特·E·斯切尔 | The forming method of drum closure and device thereof |
| WO1993010986A1 (en) * | 1991-12-05 | 1993-06-10 | Koninklijke Emballage Industrie Van Leer B.V. | Drum with drum closure |
| WO2003062079A1 (en) * | 2002-01-22 | 2003-07-31 | Sudarshan Madhoprasad Saraf | An improved grooved rolled thread flange fitted on the drum top as a closer |
| CN1617820A (en) * | 2002-01-17 | 2005-05-18 | 皇家包装工业范里尔有限公司 | Closure plug |
| CN1630602A (en) * | 2002-02-08 | 2005-06-22 | 里克公司 | Container and method for preventing leakage therefrom through isolating deformation in the container |
| CN101508363A (en) * | 2008-02-15 | 2009-08-19 | 张连元 | Steel D-shaped barrel plug positioning piece of steel barrel sealer and manufacture and positioning method |
| CN102530376A (en) * | 2010-12-14 | 2012-07-04 | 朗盛德国有限责任公司 | Bung lid |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3946894A (en) * | 1974-11-11 | 1976-03-30 | American Flange & Manufacturing Co. Inc. | Drum closure |
| JPS59209433A (en) * | 1983-05-12 | 1984-11-28 | Yamato Tekkosho:Kk | Method of mounting press-in type flange of container such as drum and the like |
| US20050269335A1 (en) * | 2004-05-21 | 2005-12-08 | Saraf Sudarshan M | Grooved rolled threaded flange |
-
2013
- 2013-02-28 EP EP13157302.4A patent/EP2772449A1/en not_active Withdrawn
-
2014
- 2014-02-26 CN CN201410067643.8A patent/CN104015971A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3208775A (en) * | 1961-05-10 | 1965-09-28 | Leer Ind Ltd Van | Seal for bung bushings |
| GB1392603A (en) * | 1971-08-05 | 1975-04-30 | Drums Ltd | Containers |
| US4706836A (en) * | 1987-01-23 | 1987-11-17 | Allen-Stevens Drum Accessories Corp. | Leak-resistant drum seals |
| CN1051323A (en) * | 1988-06-13 | 1991-05-15 | 罗伯特·E·斯切尔 | The forming method of drum closure and device thereof |
| WO1993010986A1 (en) * | 1991-12-05 | 1993-06-10 | Koninklijke Emballage Industrie Van Leer B.V. | Drum with drum closure |
| CN1617820A (en) * | 2002-01-17 | 2005-05-18 | 皇家包装工业范里尔有限公司 | Closure plug |
| WO2003062079A1 (en) * | 2002-01-22 | 2003-07-31 | Sudarshan Madhoprasad Saraf | An improved grooved rolled thread flange fitted on the drum top as a closer |
| CN1630602A (en) * | 2002-02-08 | 2005-06-22 | 里克公司 | Container and method for preventing leakage therefrom through isolating deformation in the container |
| CN101508363A (en) * | 2008-02-15 | 2009-08-19 | 张连元 | Steel D-shaped barrel plug positioning piece of steel barrel sealer and manufacture and positioning method |
| CN102530376A (en) * | 2010-12-14 | 2012-07-04 | 朗盛德国有限责任公司 | Bung lid |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2772449A1 (en) | 2014-09-03 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140903 |