Patent US3600546A successfully refreshed from Google Patents.
US3600546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge treatment and machining apparatus
Assignee: Kanadevia Corp
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Filing: 1969-08-20
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Granted: 1971-08-17
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Expires: 1989-08-20
Abstract
Abstract A method of electrical discharge machining employs a sugar mill roll as a cathode and an electrode for performing treatment serving as an anode. Water is injected therebetween and concurrently therewith repetitive transient arc discharges are effected, whereby the grooved surface of the roll is provided with satin finish. The electrode can be a turner or scraper plate which is machined with the roll serving as the tool electrode and subsequently employed with the roll as a mill.
Inventors
- 👤 Toshio Niwa
- 👤 Yasuo Kimoto
- 👤 Katsunori Tamiya
- 👤 Hisashi Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:15
CPC Classifications
B; B23; B23H; B23H9/00; B23H9/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
An electrical discharge apparatus comprising a generally cylindrical sugar mill roll having a plurality of axially spaced circumferential grooves, an electrode spaced apart from said roll in facing relationship therewith by a distance capable of effecting electrical discharge, means for providing water between said roll and said electrode, and an electric circuit, the roll connected to the circuit as a cathode and the electrode connected to the circuit as an anode, whereby the circuit may effect repetitive discharges between the roll and the electrode to satin-finish the surface of said roll by the discharges.
Claim 2
Dependent Claim
94 words
An electrical discharge apparatus comprising a generally cylindrical sugar mill roll having a plurality of axially spaced circumferential grooves, an electrode spaced apart from said roll in facing relationship therewith by a distance capable of effecting electrical discharge, means for providing water between said roll and said electrode, and an electric circuit, the roll connected to the circuit as a cathode and the electrode connected to the circuit as an anode, whereby the circuit may effect repetitive discharges between the roll and the electrode to satin-finish the surface of said roll by the discharges.
Claim 3
Dependent Claim
34 words
The electrical discharge apparatus of claim 1 wherein said electrode is provided with spaced-apart projections conforming to the grooves in the roll and indentations conforming to the surface of the roll between the grooves.
Claim 4
Dependent Claim
14 words
The electrical discharge apparatus of claim 2 wherein said electrode is a turner plate.
Claim 5
Dependent Claim
13 words
The electrical discharge apparatus of claim 2 wherein said electrode is a scraper.
Claim 6
Dependent Claim
35 words
The electrical discharge apparatus of claim 1 including a water-retaining housing disposed about the electrode and spaced from the electrode whereby water from the water-providing means may be retained in surrounding relationship with the electrode.
Claim 7
Dependent Claim
54 words
The electrical discharge apparatus of claim 5 including a holder supporting the electrode and the housing, means for advancing and retracting the holder toward and awAy from the roll generally perpendicularly to the axis of the roll, and means for moving the holder in a direction generally parallel to the axis of the roll.
Claim 8
Dependent Claim
146 words
An electrical discharge apparatus comprising a generally cylindrical sugar mill roll having a plurality of axially spaced circumferential grooves, an electrode spaced apart from the roll in facing relationship therewith by a distance capable of effecting electrical discharge, the electrode having spaced-apart projections conforming to the grooves in the roll and indentations conforming to the surface of the roll between the grooves, a nozzle adjacent the roll and the electrode for supplying water between the roll and the electrode, a holder supporting the electrode, a water-retaining housing supported by the holder surrounding the electrode and spaced therefrom whereby water may be retained in surrounding relationship with the electrode, means for advancing and retracting the holder toward and away from the ro generally perpendicularly to the axis of the roll, and means for moving the holder in a direction generally parallel to the axis of the roll.
Claim 9
Dependent Claim
146 words
An electrical discharge apparatus comprising a generally cylindrical sugar mill roll having a plurality of axially spaced circumferential grooves, an electrode spaced apart from the roll in facing relationship therewith by a distance capable of effecting electrical discharge, the electrode having spaced-apart projections conforming to the grooves in the roll and indentations conforming to the surface of the roll between the grooves, a nozzle adjacent the roll and the electrode for supplying water between the roll and the electrode, a holder supporting the electrode, a water-retaining housing supported by the holder surrounding the electrode and spaced therefrom whereby water may be retained in surrounding relationship with the electrode, means for advancing and retracting the holder toward and away from the ro generally perpendicularly to the axis of the roll, and means for moving the holder in a direction generally parallel to the axis of the roll.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |