Abstract: Provided is a manufacturing apparatus (1) for a glass sheet, including roller pairs (5), which are configured to convey a glass ribbon (G) downward while sandwiching the glass ribbon (G) from both front and back sides, and are arranged in a plurality of vertical stages, wherein each of rollers forming each of the roller pairs (5) is formed so as to be movable between a sandwiching position for sandwiching the glass ribbon (G) a retracted position that is separated from a conveyance path (P) of the glass ribbon (G) and is capable of preventing contact of flying objects flying from above, and wherein, when the glass ribbon (G) during conveyance is damaged, the roller (5a) that is positioned below a damaged part of the glass ribbon (G) moves to the retracted position.

Abstract: 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.

Abstract: 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.

Abstract: Provided is a manufacturing apparatus (1) for a glass sheet, including roller pairs (5), which are configured to convey a glass ribbon (G) downward while sandwiching the glass ribbon (G) from both front and back sides, and are arranged in a plurality of vertical stages, wherein each of rollers forming each of the roller pairs (5) is formed so as to be movable between a sandwiching position for sandwiching the glass ribbon (G) a retracted position that is separated from a conveyance path (P) of the glass ribbon (G) and is capable of preventing contact of flying objects flying from above, and wherein, when the glass ribbon (G) during conveyance is damaged, the roller (5a) that is positioned below a damaged part of the glass ribbon (G) moves to the retracted position.

Abstract: 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 ?m or more and 200 ?m or less, and has each end surface in a width direction formed as a cut surface cut by laser splitting.

Abstract: A method of manufacturing a band-shaped glass includes forming, while being drawn downward, the band-shaped glass having a thickness of 300 ?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>???200 mm, where ? 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.

Abstract: Provided is an apparatus for manufacturing a glass sheet (G), which is configured to form the glass sheet (G) by fusing streams of molten glass together at a lower edge (4) of a forming device (1) while causing the streams of molten glass (Gm) to flow downward along both outer surface portions (3) of the forming device (1) by an overflow downdraw method, the forming device (1) including protruding pieces (7), which protrude downward from the lower edge (4) of the forming device (1), and are arranged at least at both widthwise end portions of the lower edge of the forming device (1), the protruding pieces (7) each having a distal end (9) formed by a straight line substantially parallel to the lower edge (4) of the forming device (1).

Abstract: 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.

Abstract: 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.

Abstract: A method of manufacturing a band-shaped glass includes forming, while being drawn downward, the band-shaped glass having a thickness of 300 ?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>???200 mm, where ? 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.

Abstract: A manufacturing apparatus for a thin glass sheet includes a forming member main body configured to form the thin glass sheet by fusing together, at a lower end portion of the forming member main body, streams of molten glass, which have overflown from an overflow trough to both sides of the forming member main body, under a state in which the streams of the molten glass are caused to flow down along outer surface portions having a substantially wedge shape. The manufacturing apparatus also includes a pair of covering members fitted onto both widthwise end portions of the forming member main body, respectively, the pair of covering members forming restricting wall portions for restricting widthwise spread of the streams of the molten glass flowing down along the outer surface portions of the forming member main body.

Abstract: 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 ?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.

Abstract: 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 (1) is formed by winding a glass film (4) and a cushion sheet (5), under a state of being superposed, around a roll core (3) including a flange (2) at each end portion thereof, in which an end portion in a width direction of the glass film (4) is separated from the flange (2) on each side in the width direction of the glass film (4), and the cushion sheet (5) is extended beyond the end portion in the width direction of the glass film (4) to the flange (2) side, to thereby form an extension portion (5a).

Abstract: A glass film laminate has a glass film, a support sheet laminated on one surface of the glass film to extend off the glass film, and a protective sheet peelably laminated on the other surface of the glass film to cover the edges of the glass film. A glass roll is produced by winding the laminate.

Abstract: A manufacturing apparatus for a thin glass sheet includes a forming member main body configured to form the thin glass sheet by fusing together, at a lower end portion of the forming member main body, streams of molten glass, which have overflown from an overflow trough to both sides of the forming member main body, under a state in which the streams of the molten glass are caused to flow down along outer surface portions having a substantially wedge shape. The manufacturing apparatus also includes a pair of covering members fitted onto both widthwise end portions of the forming member main body, respectively, the pair of covering members forming restricting wall portions for restricting widthwise spread of the streams of the molten glass flowing down along the outer surface portions of the forming member main body.

Abstract: 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 (1), which is formed by winding a glass film (2) into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R?(T/2)[(2.3/?)×E?1], where ? represents flexural strength of the glass film (2) 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.

Abstract: After a glass film ribbon (3) is formed while allowing a glass to descend, the glass film ribbon (3) is annealed while allowing the glass film ribbon (3) to descend in an annealer (5) to remove an internal strain. Then, when the glass film ribbon (3) having a thickness at a center portion excluding both widthwise ends of 300 ?m or less is cut, after processing in the annealer (5) is executed and before a cutting step is executed, main tensile rollers (6R) that play a role as principal tensile rollers hold the descending glass film ribbon (3) and are driven to rotate, to thereby provide at least the glass film ribbon (3) in the annealer (5) with tension in a vertical direction.

Abstract: 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 (1), which is formed by winding a glass film (2) into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R?(T/2)[(2.3/?)×E?1], where ? represents flexural strength of the glass film (2) 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.

Abstract: 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 (1) is formed by winding a glass film (4) and a cushion sheet (5), under a state of being superposed, around a roll core (3) including a flange (2) at each end portion thereof, in which an end portion in a width direction of the glass film (4) is separated from the flange (2) on each side in the width direction of the glass film (4), and the cushion sheet (5) is extended beyond the end portion in the width direction of the glass film (4) to the flange (2) side, to thereby form an extension portion (5a).

Abstract: Provided is a package form, with which cleanness of a glass film is ensured and the glass film is prevented from breaking. The package form is effective in minimizing the number of glass film processing steps to be performed before packaging and after unpackaging. As the package form for a glass film, provided is a glass roll (1) formed by winding a glass film (2) into a roll while superposing the glass film (2) on a protective sheet (3), the glass film (2) being formed by an overflow downdraw method and having exposed front and back surfaces.