Metallic bung closure with protective plastic layer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65D-039/16
B65D-039/08
B29C-045/14
B29K-023/00
B29K-705/00
B29L-001/00
B29L-031/56
출원번호
US-0396668
(2013-04-23)
등록번호
US-9725213
(2017-08-08)
우선권정보
DE-20 2012 004 201 U (2012-04-23)
국제출원번호
PCT/EP2013/001220
(2013-04-23)
국제공개번호
WO2013/159913
(2013-10-31)
발명자
/ 주소
Weyrauch, Detlev
출원인 / 주소
MAUSER-WERKE GMBH
대리인 / 주소
Henry M. Feiereisen LLC
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
A bung closure for gas-tight and liquid-tight closure of a bung opening of a container, includes a cup-shaped basic body made from metal and having a disk-shaped base and an adjoining, upwardly open, tubular ring part; at least one interlocking element in the form of a shaped sheet-metal strip or a
A bung closure for gas-tight and liquid-tight closure of a bung opening of a container, includes a cup-shaped basic body made from metal and having a disk-shaped base and an adjoining, upwardly open, tubular ring part; at least one interlocking element in the form of a shaped sheet-metal strip or a tab provided within the cup-shaped basic body for engagement with a screwing tool for screwing the bung closure into, and out of the bung opening of the container; and a stable plastics layer provided on the outer side of the ring part, with an external thread formed on an outside of the plastics layer for threaded engagement with the internal thread of the bung opening.
대표청구항▼
1. A bung closure for gas-tight and liquid-tight closure of a bung opening of a container, comprising: a cup-shaped basic body made from metal and having a disk-shaped base and an adjoining, upwardly open, tubular ring part;at least one interlocking element in the form of a shaped sheet-metal strip
1. A bung closure for gas-tight and liquid-tight closure of a bung opening of a container, comprising: a cup-shaped basic body made from metal and having a disk-shaped base and an adjoining, upwardly open, tubular ring part;at least one interlocking element in the form of a shaped sheet-metal strip or a tab provided within the cup-shaped basic body for engagement with a screwing tool for screwing the bung closure into, and out of the bung opening of the container; anda stable plastics layer provided on the outer side of the ring part, with an external thread formed on an outside of the plastics layer for threaded engagement with the internal thread of the bung opening, wherein the outer side of the ring part on which the plastics layer is provided is free of any thread formations,wherein between the outer side of the tubular ring part and the plastics layer a screwing secured interlocking-type fixed connection is provided for a transmission of high torques. 2. The bung closure of claim 1, wherein the container comprises a steel drum for storing and for transporting hazardous liquid charges. 3. The bung closure of claim 1, wherein the plastics layer extends continuously and leakproof over an entire outer surface of the cup-shaped basic body, said external thread being formed on the plastics layer in a region in which the plastics layer covers the outer side of the ring part. 4. The bung closure of claim 2, wherein the cup-shaped basic body comprises a two-part cup-shaped design, in which an upper cup-shaped part not coming into contact with the charge is composed of metal, preferably steel, and a lower cup-shaped part coming into contact with the charge is composed of plastic. 5. The bung closure of claim 1, wherein the interlocking element has respective ends shaped as arcs, and is welded onto an outward-facing side of the disk-shaped base. 6. The bung closure of claim 3, wherein the continuous, stable plastics layer with the external thread on the outer side is injection molded onto the entire outer surface of the cup-shaped metallic basic body. 7. The bung closure of claim 1, wherein the plastics layer forms a portion of a premanufactured injection molded cup-shaped plastics part having a disk-shaped base and an adjoining, upwardly open, tubular ring part and corresponds in shape to the cup-shaped basic body, said cup-shaped plastics part being pulled and nonreleasably fixedly latched onto the cup-shaped basic body and connected to corresponding undercuts of the cup-shaped basic body via a snap-on/latching connection. 8. The bung closure of claim 1, wherein a peripheral sealing seat for insertion of a separate sealing ring is formed in the outer plastics layer above the external thread and directly below an upper flange edge of the metallic basic body. 9. The bung closure of claims 6, wherein the outer plastics layer has an integrated sealing lip above the external thread and directly below the upper flange edge of the metallic basic body, said integrated sealing lip being injection-molded onto the cup-shaped basic body along with the plastics layer. 10. The bung closure of claim 9, wherein the plastics layer is made from basic plastic and the sealing lip is composed of a different plastics material than the plastics layer and is formed by two-component injection molding. 11. The bung closure of claim 1, wherein the at least one interlocking element comprises curved, upwardly protruding sheet-metal strips formed from the disk-shaped base and/or from the tubular ring part on at least two diametrically opposed sides within the cup-shaped metallic basic body. 12. The bung closure of claim 11, wherein an integrated portion of the continuous plastics layer engages into and supports the upwardly protruding sheet-metal strips at least partially in the direction of the tubular ring part, below the disk-shaped base. 13. The bung closure of claim 1, wherein the at least one integrated interlocking element is constructed as an inwardly curved sheet-metal tab formed from the tubular ring part and partially from the disk-shaped base on at least two diametrically opposing sides within the cup-shaped metallic basic body, said sheet-metal tab being connected fixedly at its upper end to the tubular ring part or to an upper flange edge of the tubular ring part and being fixedly connected at its lower end to the disk-shaped base. 14. The bung closure of claim 13, wherein a pin-like plastics projection which is integrated into the plastics layer is formed on at least two diametrically opposing sides on an inner side of the plastics layer approximately opposite the external thread of the plastics layer, said plastics projection engaging in an interlocking manner from the outside with a precise fit into cutouts formed in the ring part and optionally partially in the disk-shaped base, said cutouts being formed by the inwardly curved sheet-metal tabs. 15. A method for producing the two-part bung closure for gas-tight and liquid-tight closure of the bung opening of the container of claim 1, comprising: inserting the cup-shaped basic body made from metal, having the disk-shaped base and the adjoining, upwardly open, tubular ring part into an injection mold; permanently injection molding the stable plastics layer at least onto an outer side of the tubular ring part; and forming the external thread in the plastics layer by a correspondingly shaped inside of the injection mold. 16. A method for producing the two-part bung closure for the gas-tightand liquid-tight closure of the bung opening of the container of claim 1, comprising: preforming the cup-shaped basic body made from metal having the disk-shaped base, integrated interlocking elements and the adjoining, upwardly open, tubular ring part; premanufacturing in an injection mold a cup-shaped plastics part corresponding in shape to the cup-shaped basic body and having a disk-shaped base and the adjoining, upwardly open, tubular ring part with the external thread; and pulling the cup-shaped plastics part over the cup-shaped metal basic body and nonreleasably fixedly latching and connecting the cup-shaped plastics part to corresponding undercuts via a snap-on/latching connection.
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이 특허에 인용된 특허 (5)
Van De Klippe,Cornelis R.; Kars,Herman P., Closure plug improvement.
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