Glass panel for color television picture tube
AssigneeNippon Electric Glass Co., Ltd.
InventorsKazunobu Kunitomo, Tadasuke Teraoka
Life of this patent
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Abstract
Each of the flat surfaces of the pin-seal portions is formed such that the width thereof in the second direction gradually increases as far as the portion upper than the stud pin in the direction from the side of the face portion to the side of the seal end surface, and forms the symmetrical shape about the center portion in the second direction. Namely, the flat surface is formed so as to have the substantially half ellipse shape which has the major axis in the second direction, and protrudes toward the face portion.
Claims9
A glass panel for a color television picture tube comprising:
- a substantially rectangular face portion provided with an effective screen;
- a skirt portion continuing to a periphery of the face portion through a blend R portion;
- a seal end surface formed on an open end of the skirt portion;
- pin-seal portions for stud pins for retaining a shadow mask, formed on an inner wall surface of the skirt portion,
- wherein flat surfaces are formed at the pin-seal portions, each of the flat surfaces being substantially parallel with a first direction along a panel center axis and substantially parallel with a second direction along a line across two neighboring corners of the skirt portion, a width of which in the second direction gradually increases in a direction from the face portion to the seal end surface as far as at least an end of the stud pin at the side of the face portion.
A glass panel for a color television picture tube comprising:
- a substantially rectangular face portion provided with an effective screen;
- a skirt portion continuing to a periphery of the face portion through a blend R portion;
- a seal end surface formed on an open end of the skirt portion;
- pin-seal portions for stud pins for retaining a shadow mask, formed on an inner wall surface of the skirt portion,
- wherein flat surfaces are formed at the pin-seal portions, each of the flat surfaces being substantially parallel with a first direction along a panel center axis and substantially parallel with a second direction along a line across two neighboring corners of the skirt portion, and an outer periphery in the second direction of each of the flat surfaces is formed so as not to protrude more than a joint portion between outer peripheral side extensions of the outer periphery and the inner wall surface of the skirt portion toward the opposing inner wall surface of the skirt portion.
Dependencies are inferred from the claim text.