Nippon Electric Glass Co., Ltd.

Katsutoshi Fujiwara

Takahide Nakamura

Michiharu Eta

Takahide Fujii

Tatsuya Takaya

Masahiro Tomamoto

Hiroshi Takimoto

Hidetaka Oda

Daisuke Nagata

Toru Sakurabayashi

Yasuo Yamazaki

Yasuhiko Ogiso

Shinichi Ishibashi

Keiji Takagi

Mitsuharu Noda

Shusaku Tamamura

Takahiro Kawaguchi

Shusuke Okamoto

Yoshinari Kato

Hisatoshi Aiba

A glass manufacturing apparatus includes a dissolving vessel configured to dissolve a glass raw material to produce a molten glass, a forming vessel configured to form the molten glass into a predetermined shape, and glass supply tubes configured to convey the molten glass from the dissolving vessel to the forming vessel. The glass supply tubes each include a tube body, a flange portion, which is arranged in an outer circumferential portion of the tube body and has first and second parts, an electrode portion arranged in the first part, and a temperature difference setting portion configured to cause a temperature difference between the first and second parts. The temperature difference setting portion sets a temperature of the first part to be higher than that of the second part.

Glass production device, glass production method, glass supply pipe, and molten glass transport method

A glass roll includes a glass film formed by a downdraw method. The glass film is wound into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in the forming operation are exposed, and during the winding operation, the glass film is superposed on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The protective sheet can further be wound on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.

Glass roll with a separable protective sheet

An apparatus for manufacturing a glass sheet is configured to form the glass sheet by fusing streams of molten glass together at a lower edge of a forming device while causing the streams of molten glass to flow downward along outer surface portions of the forming device by an overflow downdraw method, the forming device including protruding pieces, which extend downward below the lower edge of the forming device, and are arranged at least at widthwise end portions of the lower edge of the forming device, the protruding pieces each having a distal end formed by a straight line substantially parallel to the lower edge of the forming device.

Method of manufacturing glass sheet

A glass roll reliably prevents a glass film from breaking from an end surface of the glass film as an origin of breakage. The glass roll is formed by winding the glass film into a roll while superposing the glass film on a protective sheet. The glass film is formed by an overflow downdraw method to have a thickness of 1 &#x3bc;m or more and 200 &#x3bc;m or less, and has each end surface in a width direction formed as a cut surface cut by laser splitting.

Glass roll, device for producing glass roll, and process for producing glass roll

A method of manufacturing a band-shaped glass includes forming, while being drawn downward, the band-shaped glass having a thickness of 300 &#x3bc;m or less except both edge portions in a width direction thereof, and then changing a conveying direction of the band-shaped glass to a lateral direction so that a front surface constitutes an upper surface. The band-shaped glass is introduced to a region for changing the conveying direction under a curved state in which the front surface side thereof is concave in the width direction. The band-shaped glass in the curved state satisfies a relationship of 0&#x3e;&#x3b4;&#x2267;&#x2212;200 mm, where &#x3b4; represents a maximum separation distance with respect to an imaginary straight line connecting both the edge portions of the band-shaped glass in the width direction, provided that the maximum separation distance is positive on the front surface side of the band-shaped glass.

Method for manufacturing band-shaped glass

The present invention is aimed to provide a method for producing a glass substrate with a thickness of not more than 200 &#x3bc;m, which is satisfied with the quality required for a substrate on which a thin-film electric circuit is formed, and a sheet glass substrate obtained according to this method. The present invention is concerned with a method for producing a glass substrate having a sheet thickness of from 10 to 200 &#x3bc;m, including a forming step of forming a molten glass into a ribbon shape in accordance with a down draw method, an annealing step of annealing the glass ribbon, and a cutting step of cutting the glass ribbon to give a glass substrate, wherein an average cooling rate in a temperature range of from the (annealing point+200&#xb0; C.) to the (annealing point+50&#xb0; C.) is controlled to the range of from 300 to 2,500&#xb0; C./min.

Method for producing glass substrate and glass substrate

A manufacturing method for a glass roll includes forming a glass film by a downdraw method, winding the glass film into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in said forming operation are exposed, and during said winding operation, superposing the glass film on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The method may further include winding the protective sheet on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.

Process for producing glass roll with a separable protective sheet

After a glass film ribbon is formed while allowing a glass to descend, the glass film ribbon is annealed while allowing the glass film ribbon to descend in an annealer to remove an internal strain. Then, when the glass film ribbon having a thickness at a center portion excluding both widthwise ends of 300 &#x3bc;m or less is cut, after processing in the annealer is executed and before a cutting step is executed, main tensile rollers that play a role as principal tensile rollers hold the descending glass film ribbon and are driven to rotate, to thereby provide at least the glass film ribbon in the annealer with tension in a vertical direction.

Glass film ribbon production method and glass film ribbon production apparatus

Provided is a glass roll utilizing a flanged roll core, and reliably inhibiting a glass film from breaking from an end portion in a width direction thereof as an origin of breakage. A glass roll () is formed by winding a glass film () and a cushion sheet (), under a state of being superposed, around a roll core () including a flange () at each end portion thereof, in which an end portion in a width direction of the glass film () is separated from the flange () on each side in the width direction of the glass film (), and the cushion sheet () is extended beyond the end portion in the width direction of the glass film () to the flange () side, to thereby form an extension portion ().

Glass roll

Provided is a glass roll formed by winding a glass film into a roll, in which a minimum winding radius of the glass film is optimized. Thus, the glass film is reliably prevented from breaking due to static fatigue, and is able to be stored for long periods. A glass roll (), which is formed by winding a glass film () into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R&#x2267;(T/2)[(2.3/&#x3c3;)&#xd7;E&#x2212;1], where &#x3c3; represents flexural strength of the glass film () obtained by a 3-point bending test, T represents a thickness of the glass film, and E represents a Young's modulus of the glass film.

Growing community of inventors

Shiga, Japan

Katsutoshi Fujiwara