US5057967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolled film capacitor
Assignee: Nichicon Corp
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Filing: 1990-07-10
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Granted: 1991-10-15
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Expires: 2010-07-10
Abstract
Abstract A rolled film capacitor comprising a pair of dielectric film strips piled one upon another and wound into a roll, each strip having a metal electrode pattern deposited on one surface thereof, the pattern including a number of rectangular island electrodes mutually separated by a plurality of lateral and longitudinal insulating gaps and regularly arrayed in both directions, the island electrodes mutually overlapping to form a number of small capacitor elements which are connected in series in both directions by shifting both strips one from another in both directions. A plurality of such capacitors can be aggregated to form an improved large capacitive power supply device.
Inventors
- 👤 Minoru Den
- 👤 Hirokazu Sakaguchi
- 👤 Morihiko Hasebe
- 👤 Shigeyoshi Nishikawa
- 👤 Masayoshi Kakine
- 👤 Shusaku Tsujio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:49
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/38; H01G4/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
201 words
A rolled film capacitor comprising first and second dielectric film strips which are piled one upon another and wound into a roll, each said strip having a metal layer deposited on one surface thereof, said metal layer being divided into a plurality of island electrodes which are mutually separated by a plurality of insulating gaps extending in the lateral and longitudinal directions and regularly arrayed in both said directions, said island electrodes on said strips facing each other to form a plurality of capacitor elements and shifted both laterally and longitudinally one from another in a generally overlapping fashion so as to electrically connect said capacitor elements in series in both said directions, said roll having a first end face formed with said one side edge of said first strip, a second end face formed with said one side edge of said second strip, a first electrode terminal formed on said first end face in contact with all of said island electrodes lying along said one side edge of said first strip, and a second electrode terminal formed on said second end face in contact with all of said island electrodes lying along said one side edge of said second strip.
Claim 2
Dependent Claim
201 words
A rolled film capacitor comprising first and second dielectric film strips which are piled one upon another and wound into a roll, each said strip having a metal layer deposited on one surface thereof, said metal layer being divided into a plurality of island electrodes which are mutually separated by a plurality of insulating gaps extending in the lateral and longitudinal directions and regularly arrayed in both said directions, said island electrodes on said strips facing each other to form a plurality of capacitor elements and shifted both laterally and longitudinally one from another in a generally overlapping fashion so as to electrically connect said capacitor elements in series in both said directions, said roll having a first end face formed with said one side edge of said first strip, a second end face formed with said one side edge of said second strip, a first electrode terminal formed on said first end face in contact with all of said island electrodes lying along said one side edge of said first strip, and a second electrode terminal formed on said second end face in contact with all of said island electrodes lying along said one side edge of said second strip.
Claim 3
Dependent Claim
54 words
A rolled film capacitor as set forth in claim 1, wherein said island electrodes lying along said one side edge of each said strip are connected to form a single continuous region, and said first and second electrode terminals are put in contact with said continuous regions on said first and second strips, respectively.
Claim 4
Dependent Claim
48 words
A rolled film capacitor as set forth in claim 1, wherein the cumulative energy of each said capacitor element is one joule or less at a rated voltage, and the potential gradient of said dielectric film is 150 killovolts per millimeter or above at a rated charging voltage.
Claim 5
Dependent Claim
44 words
A rolled film capacitor as set forth in claim 1, wherein the cumulative energy of each said capacitor element is one joule or less at a rated voltage, and the rated effective voltage of each said capacitor element is 600 volts a.c. or less.
References Cited (Backward Citations)
US3292063A
Cited
JPH01162318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |