Nippon Sheet Glass Company, Limited

Toshio Akimoto

Kazuo Shibaoka

Takao Miwa

Kouichi Suzuki

Hiroshi Nishikawa

Katsuya Kamisaku

Noriaki Eto

Masashi Uehara

Shunji Onishi

There is provided a reflecting mirror for use in a rear projection display and so on, comprising a glass substrate at least one surface of which is polished to have a predetermined surface waviness (0.05 &mgr;m or less on the measurement condition that the cut-off value is 0.8 mm to 8 mm), and a reflecting film which is formed on the polished surface of the glass substrate by film-forming in order of aluminum (Al), magnesium fluoride (MgF ) and titanium dioxide (TiO ). As a result, it is possible to obtain a reflecting mirror wherein any pattern of light and shade in an image projected on a screen which occurs due to the difference in light intensity resultant from irregularities in the mirror are prevented, and thereby the image quality can be improved.

Reflecting mirror and rear projection display making use thereof

In a glass front-panel for a cathode ray tube, whose surface layer contains more potassium ions than those in the interior thereof, and whose flange is stuck to a rear panel to form a vacuum vessel, only the surface layer of the flange portion is substantially removed, or in a glass front-panel for a cathode ray tube, comprising an image displaying portion, a side wall portion and a flange portion, a belt-like electrode for making a gradient of electric potential easier is disposed on a surface of the side wall portion, so that the cathode ray tube is prevented from being damaged due to dielectric breakdown.

Glass front-panel

A method of bonding a glass and a metal with a low-melting glass frit, in which the low-melting glass frit contains from 1 to 10% by weight of an aluminum borate whisker, and the difference in linear expansion coefficient between the low-melting glass frit and the glass is 10.times.10.sup.-7 /.degree.C. or less; and a method for producing a cathode ray tube comprising the step of bonding a glass back plate and a metal stud pin with a low-melting glass frit, the low-melting glass frit containing from 1 to 10% by weight of an aluminum borate whisker, and the difference in linear expansion coefficient between the low-melting glass frit and the glass back plate being 10.times.10.sup.-7 /.degree.C. or less.

Method for bonding glass and metal

Method of producing a glass front-panel protected from coloring by

A glass pressure vessel for a cathode ray tube comprising a concave glass and a rectangular glass back-plate to be bound to the concave glass with glass Frit, satisfies the following inequalities,

Glass pressure-vessel for a cathode ray tube

In a method of forming a glass product having a smooth surface according to this invention, a glass plate is placed on a male mold which is formed to have dimensions corresponding to the inner dimensions of the glass product and contacts its inner peripheral edge portion, an outer peripheral portion to be deformed of the glass plate is heated to a temperature higher than that of a central portion, serving as the smooth surface, of the glass plate so as to be deformed on the male mold by its weight, and the deformed glass plate is pressed by a female mold formed to have dimensions corresponding to the outer dimensions of the glass product.

Method of forming glass product having smooth surface

A mold for producing a glass article having an opening and a protruding hollow portion, said mold comprising

Growing community of inventors

Yokkaichi, Japan

Toshio Akimoto