[특허]Radiofrequency welding apparatus

[미국특허] Radiofrequency welding apparatus 원문보기

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국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B23K-013/01
출원번호	US-0486533 (2009-06-17)
등록번호	US-8502121 (2013-08-06)
발명자 / 주소	Vess, Mark A.
출원인 / 주소	Covidien LP
대리인 / 주소	Mello, Esq., John Paul
인용정보	피인용 횟수 : 0 인용 특허 : 56

초록 ▼

Apparatus and methods for radiofrequency (RF) welding are disclosed. RF power delivered to a welding platen of the apparatus is capacitively split into first and second RF power components of different magnitudes. The power components are simultaneously delivered to respective first and second die m

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1. Radiofrequency welding apparatus comprising: a first welding platen;a second welding platen;a single source providing radiofrequency power to the first welding platen;a first die member mounted on said first welding platen;a second die member mounted on said first welding platen adjacent the first die member, the first and second die members being electrically isolated; anda radiofrequency power distributing device for capacitively splitting the radiofrequency power provided to said first welding platen into first and second radiofrequency power components of different magnitudes and for simultaneously delivering said RF power components to said first and second die members, respectively, the radiofrequency power distributing device comprising separate first and second electrically isolated conductive plates of different sizes, said first conductive plate being positioned at an elevation between the first welding platen and the first die member and said second conductive plate being positioned at an elevation between the first welding platen and the second die member, the first conductive plate being electrically connected to the first die member and electrically isolated from the second die member, and the second conductive plate being electrically connected to the second die member and electrically isolated from the first die member, a dielectric layer between the first welding platen and the first and second conductive plates and an electrical insulating layer extending between the first conductive plate and first die member and between the second conductive plate and the second die member. 2. Radiofrequency welding apparatus as set forth in claim 1 wherein said first and second conductive plates are positioned generally side-by-side directly over respective first and second die members. 3. Radiofrequency welding apparatus as set forth in claim 2 further comprising multiple electrical contacts between said first conductive plate and said first die member and multiple electrical contacts between said second conductive plate and said second die member. 4. Radiofrequency welding apparatus as set forth in claim 3 wherein each of said electrical contacts comprises a contact member in an opening in said electrical insulating layer. 5. Radiofrequency welding apparatus as set forth in claim 1 wherein said first and second conductive plates are of the same material and have substantially the same thickness. 6. Radiofrequency welding apparatus as set forth in claim 1 wherein said first and second die members are electrically isolated by an electrically non-conductive divider configured to allow a radiofrequency weld to bridge the first and second die members across the divider. 7. Radiofrequency welding apparatus as set forth in claim 1 wherein said first and second die members are immovable relative to one another when mounted on the first welding platen. 8. Radiofrequency welding apparatus as set forth in claim 1 wherein said first die and second members are configured for radiofrequency welding opposed sheets and a tube at least partially received between the sheets. 9. Radiofrequency welding apparatus as set forth in claim 8 wherein said first die member is configured for heating the sheets along a path to weld the sheets together at a perimeter-weld, and the second die member is configured for heating the sheets and tube along a path to weld the tube to the sheets at a tube-weld. 10. Radiofrequency welding apparatus as set forth in claim 9 wherein the first radiofrequency power component delivered to the first die member has a magnitude greater than the magnitude of the second radiofrequency power component delivered to the second die member. 11. Radiofrequency welding apparatus comprising: a first welding platen;a second welding platen;a single source providing radiofrequency power to the first welding platen;a first die member mounted on said first welding platen;a second die member mounted on said first welding platen adjacent the first die member, the first and second die members being electrically isolated; anda radiofrequency power distributing device for capacitively splitting the radiofrequency power provided to said first welding platen into first and second radiofrequency power components of different magnitudes and for simultaneously delivering said RF power components to said first and second die members, respectively, the radiofrequency power distributing device comprising separate first and second electrically isolated conductive plates and an electrical insulating layer extending between the first conductive plate and first die member and between the second conductive plate and the second die member. 12. Radiofrequency welding apparatus as set forth in claim 11 wherein said first and second conductive plates have different sizes. 13. Radiofrequency welding apparatus as set forth in claim 12 wherein said first conductive plate is positioned at an elevation between the first welding platen and the first die member and said second conductive plate being positioned at an elevation between the first welding platen and the second die member, the first conductive plate being electrically connected to the first die member and electrically isolated from the second die member, and the second conductive plate being electrically connected to the second die member and electrically isolated from the first die member.

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[미국특허] Radiofrequency welding apparatus 원문보기

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