Asahi Glass Company, Limited

Toshikazu Ikezawa

Tsunehiko Sugawara

Naoya Shimizu

Naoki Morihiro

Yusuke Kobayashi

Toshihide Murakami

Takuji Oyama

Eiji Shidoji

Yoshihiro Tsuchimoto

Noritoshi Horie

Hiroshi Yamasaki

Junnosuke Mizukami

A CRT panel glass and a CRT wherein a surface treating film is formed on an outer surface of a CRT panel so that overall transmittance distribution and reflectance distribution within an effective picture plane satisfy specific mathematical expressions, whereby, even with a flattened panel glass, brightness and contrast are uniform over the entire surface of the image display plane, and their production method.

CRT panel glass and CRT, and their production methods

Air is blowed before an annealing step to corner portions in an inner face portion of a glass panel which has been press-formed in a mold to cool that portions to be stronger than the other portion whereby a temperature difference between the corner portions and the other portion is reduced.

Method for producing a glass panel for a cathode ray tube

A glass panel 3 for a glass tube for a cathode ray tube has a flat panel face portion 7 and a reduced thickness while maintaining a sufficient strength without increasing a difference of brightness, and with less shrinking deformation due to the cooling and solidification of the glass panel. Compressive stress layers 20, 21 having a thickness of t.sub.o /10 or more are formed in outer and inner surfaces of the face portion 7 of the glass panel 3 respectively. The relation of the wall thickness t.sub.d of the central portion of the face portion to the wall thickness t.sub.o of a portion near an edge portion on a diagonal line is 1.0.ltoreq.t.sub.d /t.sub.o .ltoreq.1.2. Compressive stress layers 22, 23 are formed in outer and inner surfaces of a skirt portion 6 wherein the compressive stress value of the face portion 7 is larger than the compressive stress value of the skirt portion, and the compressive stress value of the outer surface 20 of the face portion is larger than that of the inner surface 21.

Glass bulb for a cathode ray and a method of producing the same

An apparatus for forming a glass product which comprises: a single glass gob feeding device for feeding a glass gob to a mold for forming a formed body; a press forming device for press forming the glass gob into the formed body of a predetermined shape; a formed body removing device; a plurality of carrier means on which the mold is loaded; and a transfer means for transferring and circulating the carrier means on which the mold is loaded in an order of the glass gob feeding device, the press forming device, the formed body removing device, and back to the glass gob feeding device; wherein, assuming a path is defined as a path for transferring and circulating the carrier means by the transfer means, a single path or a plurality of paths is or are provided for the single glass gob feeding device.

Apparatus for forming a glass product and a method for forming a glass

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Funabashi, Japan

Toshikazu Ikezawa