[특허]Plastic containers with folded-over internal layers and methods for making same

Plastic containers with folded-over internal layers and methods for making same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-045/16 B29C-045/76
출원번호	US-0743440 (1985-06-10)
발명자 / 주소	McHenry Robert J. (St. Charles IL) Pfutzenreuter III Henry (Alta Loma CA) Tung Thomas T. (Hoffman Estates IL) Vella Jr. John (Aurora IL)
출원인 / 주소	American National Can Company (Chicago IL 02)
인용정보	피인용 횟수 : 32 인용 특허 : 0

초록 ▼

Methods of injecting into a cavity an at least three-layer flow stream having a fast flow stream line, are provided which include establishing the flow of material of first and second layers of the flow stream to form an interface therebetween at a first location not coincident with the fast flow stream line, interposing the flow of material of a third layer in the interface, and moving the third layer to a second location relatively more proximate to, substantially coincident with, or across from and not substantially coincident with the fast flow stream line. This moving achieves foldover of the third layer and can be effected by selectively changing the flow of material(s) on one side of the third layer relative to the flow of material(s) on the other side thereof, at or shortly after the interposition of the third layer. Preferably, the interface is annular and the interposition is at substantially all places around the interface. These methods can be used to prevent, reduce or overcome bias of the terminal or marginal end portion of the third layer during multi-layer injection of a container, to provide a substantially unbiased overall leading edge of the third layer, such that the folded over portion and the unfolded portion of the marginal end portion is finally positioned in the sidewall of the container in a substantially unbiased plane relative to the axis of the container.

대표청구항 ▼

A method of injecting a multi-layer flow stream comprising three layers into an injection cavity in which the speed of flow of the layered stream is highest on a fast flow streamline positioned intermediate the boundaries of said layered stream to form an article in the cavity having a folded over internal layer, comprising during the injection cycle, establishing the flow of material of a first layer of the flow stream and the flow of material of a second layer of the flow stream adjacent to the first layer to form an interface between the flowing materials of said first and second layers, positioning the interface between the flowing materials of said first and second layers at a first location which is not coincident with said fast flow streamline, interposing the flow of material of a third layer of the flow stream between said first and second layers, said third layer to become the internal layer of the article, the location of the third layer being at a position which is not coincident with said fast flow streamline, and moving the location of said third layer to a second location which is substantially coincident with said fast flow streamline thereby causing the third layer to fold over to form an article in the cavity having a folded over internal layer.

이 특허를 인용한 특허 (32)

Kudert Frederick G. (Niles IL) Latreille Maurice G. (Batavia IL) McHenry Robert J. (St. Charles IL) Nahill George F. (Crystal Lake IL) Pfutzenreuter ; III Henry (Alta Loma CA) Tennant William A. (Sch, Apparatus for injection molding and injection blow molding multi-layer articles.
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Kudert, Frederick G.; Latreille, Maurice G.; McHenry, Robert J.; Nahill, George F.; Pfutzenreuter, III, Henry; Tennant, William A.; Tung, Thomas T.; Vella, Jr., John, Apparatus for injection molding and injection blow molding multi-layer articles.
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Swenson, Paul M., Apparatus for producing non-symmetric multiple layer injection molded products.
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York, Geoffrey; Shabudin, Esak, Co-injection moulding.
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Middleton, Scott W.; Sinclair, Mark R.; O'Hagan, Brian R.; Wnek, Patrick H.; Lafferty, Terrence P.; Blaas, Peter W.; Hjort, Kevin J.; Smith, Patrick J., Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Middleton, Scott W.; Sinclair, Mark; O'Hagan, Brian R.; Wnek, Patrick H.; Lafferty, Terrence P.; Blaas, Peter W.; Hjort, Kevin J.; Smith, Patrick J., Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Container having a rim or other feature encapsulated by or formed from injection-molded material.
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Swenson, Paul M., Heat-seal failure prevention apparatus.
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Swenson, Paul M., Heat-seal failure prevention method and article.
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Burns, Michael, Method and system for quantity entry.
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Burns, Michael, Method and system for quantity entry.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Method of forming container with a tool having an articulated section.
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Swenson, Paul M., Method of molding a multi-layer article.
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Kudert Frederick G. ; Latreille Maurice G. ; McHenry Robert J. ; Nahill George F. ; Pfutzenreuter ; III Henry ; Tennant William A. ; Tung Thomas T. ; Vella ; Jr. John, Methods and apparatus for injection molding and injection blow molding multi-layer plastic and the articles made thereby.
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Sweetland, Matthew, Methods and systems for the preparation of molded plastic articles having a structural barrier layer.
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Swenson, Paul M., Methods and systems for the preparation of molded plastic articles having a structural barrier layer.
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Kudert Frederick G. (Niles IL) Latreille Maurice G. (Batavia IL) McHenry Robert J. (St. Charles IL) Nahill George F. (Crystal Lake IL) Pfutzenreuter ; III Henry (Loma CA) Tennant William A. (Schaumbu, Methods for injection molding and injection blow molding multi-layer articles.
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Swenson, Paul M., Methods of molding multi-layer polymeric articles having control over the breakthrough of the core layer.
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Swenson, Paul M., Methods of molding multi-layer polymeric articles having control over the breakthrough of the core layer.
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Swenson, Paul M., Non-symmetric multiple layer injection molded products and methods.
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Swenson, Paul M., Non-symmetric multiple layer injection molded products and methods.
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Swenson, Paul M., Non-symmetric multiple layer injection molded products and methods.
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Sabin, Douglas; Swenson, Paul, Optimized flow to prevent core layer breakthrough.
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Chiba, Junichi; Shimizu, Kazuhiko; Hosokoshiyama, Hiroshi, Preform extrusion molding apparatus, method for extrusion molding and preform.
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Milkowski, Bogumil; Lewandowski, Dariusz; Toborowicza, Andrzej, Preform of a plastic container particularly designed for packaging foodstuffs.
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Brumfield, Harris; Ebersole, Joan; Pazner, Assaf, System and method for automatic scalping a tradeable object in an electronic trading environment.
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Brumfield,Harris; West,Robert A., System and method for group positioning of market information in a graphical user interface.
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Middleton, Scott William; Sinclair, Mark Richard; O'Hagan, Brian Robert; Wnek, Patrick Henry; Lafferty, Terrence Philip; Blaas, Peter Walrave; Hjort, Kevin James; Smith, Patrick James, Tool for forming a container.
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Kemp, II, Gary Allan; Schluetter, Jens-Uwe; Brumfield, Harris C.; Burns, Michael J.; Singer, Scott F., Trading tools for electronic trading.
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