Claims
- 1. A method of making an electrode plate of an electron gun having at least one electrode plate, comprising the steps of:
- rolling a metal plate so as to have a thick central portion and thin side portions with steps having inclined and continuous walls between the thick central portion and the thin side portions; and
- press working the thick central portion to form electron beam passage holes therein and press working the thin side portion to configure the outer shape of the electrode plate.
- 2. A method according to claim 1, wherein the step of press working the beam passage holes and the outer shape of the electrode plate is effected simultaneously.
- 3. A method according to claim 1, wherein the step of rolling the metal plate includes rolling the metal plate to have a ratio of the thickness of the thick central portion to a thickness of the thin side portions of no greater than 6.
- 4. A method according to claim 3, wherein the ratio of thickness of the thick central portion to the thickness of the thin side portion is less than 6.
- 5. A method of making an electrode plate of an electron gun having at least one electrode plate, comprising the steps of:
- rolling a metal plate so as to have a thick central portion slightly thicker than a final thickness therefor, thin side portions slightly thicker than a final thickness therefor, and steps having inclined and continuous walls between the thick central portion and the thin side portions; and
- coining the thick central portion to the final thickness therefor and press working the thick central portion to form electron passage holes therein, and coining the thin side portions to the final thickness therefor and press working the thin side portions to configure the outer shape of the electrode plate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-133182 |
May 1992 |
JPX |
|
Parent Case Info
This application is a Division of application Ser. No. 08/064,639, filed May 21, 1993.
US Referenced Citations (6)
Divisions (1)
|
Number |
Date |
Country |
Parent |
64639 |
May 1993 |
|