Abstract: Provided is a manufacturing device (1) of a glass film, the device including: a forming apparatus (10) of a glass film ribbon (G) for forming molten glass or a glass base material for secondary processing into a glass film ribbon (G); a winding apparatus (20) for winding, into a roll shape, the glass film ribbon (G), which is drawn downward while being cooled; and a width direction cutting apparatus (30) for cutting the glass film ribbon (G) along its width direction at a position before being wound by the winding apparatus (20). A vertical distance (h) from the glass film ribbon (G) forming start position by the forming apparatus (10) to a glass film ribbon (G) cutting position by the width direction cutting apparatus (30) is set as five times or more of a dimension in the width direction of the glass film ribbon (G).

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 manufacturing apparatus prevents small defects from being formed in a surface of a glass film ribbon to the extent possible when the glass film ribbon is transported toward a downstream side while curved. The apparatus includes a direction converting device for converting a traveling direction of the glass film ribbon, which is drawn downward vertically from a forming device, from a vertical direction to a horizontal direction by transporting the glass film ribbon toward a downstream side while curved in a longitudinal direction of the glass film ribbon. The direction converting device includes a curve-supporting unit for supporting the glass film ribbon curved in the longitudinal direction. The curve-supporting unit includes two lines of end portion supporting parts for supporting widthwise end regions of the glass film ribbon without supporting a widthwise central region of the glass film ribbon.

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 belt conveyor (1), comprising: an endless belt (2) for conveying an article (5) loaded thereon; and rotating wheels (3, 4) for stretching the endless belt (2) therearound, wherein contact parts of the endless belt (2) with respect to the rotating wheels (3, 4) are made of glass.

Abstract: Provided is a belt conveyor (1), comprising: an endless belt (2) for conveying an article (5) loaded thereon in a conveying direction (B); and rotating wheels (3, 4) for stretching the endless belt (2) therearound, wherein the endless belt (2) comprises: a plurality of plate glasses (2a) arrayed apart from each other along the conveying direction (B); and a coupling member (2b) for coupling the plurality of plate glasses (2a) to each other, and wherein the coupling member (2b) has stretchability higher than stretchability of each of the plurality of plate glasses (2a).

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 cutting method for a glass sheet, comprising radiating a laser beam to a cutting portion (C) of a glass sheet (G) having a thickness of 500 ?m or less to fuse the glass sheet (G), wherein a narrowest gap between fused end surfaces (Ga1 and Gb1) of the glass sheet (G), which face each other in the cutting portion (C), is managed to satisfy a relationship of 0.1?b/a?2, where “a” is a thickness of the glass sheet (G) and “b” is the narrowest gap.

Abstract: A glass sheet cutting device (1) fuses and divides a glass substrate (G) using a preset cutting line (CL) as a boundary while supplying an assist gas (AG) and a laser beam from above the glass substrate (G) along the preset cutting line (CL) of the glass substrate (G). The glass sheet cutting device (1) includes a first laser irradiator (2) for radiating a fusing laser beam (LB1) and a second laser irradiator (3) for radiating an annealing laser beam (LB2). Through a fusing gap (S) formed between fused end surfaces (Ga1, Gb1) by fusing, the second laser irradiator (3) radiates the annealing laser beam (LB2) obliquely from above onto the fused end surface (Ga1) to be annealed.

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 cleaving method for a glass film (G) including: cleaving, during conveyance of the glass film (G) in a predetermined direction, the glass film (G) continuously along a preset cleaving line (8) extending in a predetermined conveying direction (a) by a thermal stress generated through localized heating performed along the preset cleaving line (8) and through cooling of a locally heated region (H); dividing the glass film (G) in a width direction of the glass film (G) ; diverting, after the dividing, adjacent divided glass films (10) , which are obtained by the dividing, so that the adjacent divided glass films (10) are separated in a front and rear direction of the adjacent divided glass films; and forming a predetermined widthwise clearance between the adj acent divided glass films after the dividing of the glass film (G) and before the diverting of the adjacent divided glass films (10).

Abstract: A manufacturing apparatus prevents small defects from being formed in a surface of a glass film ribbon to the extent possible when the glass film ribbon is transported toward a downstream side while curved. The apparatus includes a direction converting device for converting a traveling direction of the glass film ribbon, which is drawn downward vertically from a forming device, from a vertical direction to a horizontal direction by transporting the glass film ribbon toward a downstream side while curved in a longitudinal direction of the glass film ribbon. The direction converting device includes a curve-supporting unit for supporting the glass film ribbon curved in the longitudinal direction. The curve-supporting unit includes two lines of end portion supporting parts for supporting widthwise end regions of the glass film ribbon without supporting a widthwise central region of the glass film ribbon.

Abstract: Provided is a method of manufacturing a thin glass plate, including: pouring a molten glass (Gm) into an overflow groove (2) formed in a top of a forming body (1); allowing the molten glass (Gm) which is overflown from the overflow groove (2) over both sides of the overflow groove (2) to flow downward along an outer surface portion (4) having a substantially wedge-like shape of the forming body (1); and fusing and integrating the molten glass at a lower end of the forming body (1), thereby forming a thin glass plate (G) having a thickness equal to or less than 500 ?m. In doing so, in order to suppress a releasing amount of a primary zircon crystal grain included in a surface of the forming body (1), a viscosity of the molten glass (Gm) flowing on an outer surface of the forming body (1) is controlled to be equal to or higher than 3,000 dPa·s and equal to or lower than 30,000 dPa·s throughout the outer surface of the forming body (1).

Abstract: Provided is a thin glass plate manufacturing apparatus by: pouring a molten glass (G) into an overflow trough (2) formed in a top of a forming body (1); allowing the molten glass (G) which is overflown from the overflow trough (2) over a top planar portion (3) of the forming body (1) on each side of the overflow trough (2) to flow downward along an outer surface portion (4) having a substantially wedge-like shape of the forming body (1); and fusing and integrating the molten glass (G) at a lower end of the forming body (1), thereby forming a thin glass plate having a thickness equal to or less than 500 ?m, in which a molten glass contact surface of at least the top planar portion (3) of an outer surface of the forming body (1) has a maximum height roughness (Rz) of equal to or less than 10 ?m.

Abstract: Provided is a glass roll (1), which is formed by winding a long glass film (2) into a roll, in which the long glass film (2) includes both end edges (2a) in a width direction larger in thickness relative to a center portion (2b) in the width direction, and the long glass film (2) is wound into a roll so that the both end edges (2a) overlap one another while interposing a protective sheet (10) therebetween. Specifically, the long glass film (2) is formed by a downdraw method with selvage portions (2a) left in the both end edges in the width direction, and the long glass film (2) is wound into a roll so that the selvage portions (2a) overlap one another.

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 manufacturing device (1) of a glass film, the device including: a forming apparatus (10) of a glass film ribbon (G) for forming molten glass or a glass base material for secondary processing into a glass film ribbon (G); a winding apparatus (20) for winding, into a roll shape, the glass film ribbon (G), which is drawn downward while being cooled; and a width direction cutting apparatus (30) for cutting the glass film ribbon (G) along its width direction at a position before being wound by the winding apparatus (20). A vertical distance (h) from the glass film ribbon (G) forming start position by the forming apparatus (10) to a glass film ribbon (G) cutting position by the width direction cutting apparatus (30) is set as five times or more of a dimension in the width direction of the glass film ribbon (G).

Abstract: A roll-to-roll apparatus reliably reduces breakage of a glass film even in a case of sequentially performing predetermined processing on the glass film. Provided is a glass roll (1) formed by winding a glass film (2) into a roll, in which a resin film (4) is attached onto the glass film (2), and at least a part of the resin film (4) is arranged on a front side of an unwinding direction relative to a leading end portion in the unwinding direction of the glass film (2).