Abstract: A method of manufacturing a glass sheet includes: an initial crack forming step of forming an initial crack on a mother glass sheet (MG); and a cleaving step of causing a crack (CR) to propagate in a direction along a preset cleaving line (CL) and in a thickness direction of the mother glass sheet (MG), the crack starting from the initial crack, through use of a thermal stress generated by heating of an irradiation region (SP) of laser light (L) and cooling of a cooling region (CP). The cleaving step includes heating a surface layer (SL) and an inner portion (IL) of the mother glass sheet (MG) with the laser light (L) in the irradiation region (SP) and setting a difference ?T between a highest temperature in the irradiation region (SP) and a lowest temperature in the cooling region to 575° C. or more.

Abstract: This method includes a laser irradiation step of radiating, in at least a part of a preset cleaving line (CL) of a mother glass sheet (MG), laser light (L) to a position (OSP) separated from the preset cleaving line (CL) so that a crack (CR2) propagates along the preset cleaving line (CL).

Abstract: This method includes: an initial crack forming step of forming an initial crack (CR1) on a first surface (MG1) of a mother glass sheet (MG); and a laser irradiation step of irradiating the mother glass sheet (MG) with laser light (L) to cause a crack (CR2) to propagate along a preset cleaving line (CL) through use of the initial crack (CR1) as a starting point. The laser irradiation step includes irradiating a second surface (MG2) of the mother glass sheet (MG) with the laser light (L) to heat a surface layer (SL) and an inner portion (IL) of the second surface (MG2), to thereby cause, through a thermal shock caused by the heating, the crack (CR2) to propagate in an entire thickness direction of the mother glass sheet (MG) while propagating along the preset cleaving line (CL).

Abstract: Air-cleaning control is performed in accordance with a situation of motion of a person and brightness in a room.

Abstract: An uttered utterance text that is a high priority text to be reported to a user is uttered reliably. The air purifier (10) includes an utterance text extraction unit (11a) that extracts an utterance text associated with an apparatus state and an utterance control unit (11b) that causes the utterance text extracted by the utterance text extraction unit (11a) to be uttered in descending order of priorities assigned to categories including the utterance text according to one of the priorities that is assigned to one of the categories that includes the utterance text.

Abstract: A laser irradiation step in the present method includes irradiating a first surface (MG1) of a mother glass sheet (MG) with laser light (L) to heat a surface layer (SL) and an inner portion (IL) of the first surface (MG1), to thereby cause, through a thermal shock caused by the heating, a crack (CR) to propagate to a second surface (MG2) of the mother glass sheet (MG) along a thickness direction of the mother glass sheet (MG) while propagating along a preset cleaving line (CL).

Abstract: An uttered utterance text that is a high priority text to be reported to a user is uttered reliably. The air purifier (10) includes an utterance text extraction unit (11a) that extracts an utterance text associated with an apparatus state and an utterance control unit (11b) that causes the utterance text extracted by the utterance text extraction unit (11a) to be uttered in descending order of priorities assigned to categories including the utterance text according to one of the priorities that is assigned to one of the categories that includes the utterance text.

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 air purifier (10) that purifies air includes a comparing unit (11c) that compares indoor environment data acquired by an indoor environment acquiring unit (11a) with outdoor environment data that an outdoor environment acquiring unit (11b) has acquired via a communication network and a communication unit (15), and a speech control unit (11d) that controls speech of the air purifier (10) based on the comparison result.

Abstract: Air-cleaning control is performed in accordance with a situation of motion of a person and brightness in a room.

Abstract: A cutting method of a multilayer structure containing a brittle layer is provided. The cutting method includes: cutting the multilayer structure to form a cut edge; removing a material of the multilayer structure other than the brittle layer along the cut edge, wherein the material of the multilayer structure other than the brittle layer has a width ranging from 1 micron to 2 millimeter; and modifying an edge of the brittle layer remaining after removing the material of the multilayer structure other than the brittle layer by a laser beam.

Abstract: A sheet member conveyance device includes: a support part configured to support a sheet member; and a moving part configured to move the support part to convey the sheet member, the support part including a deformation support part configured to support each of one end portion of the sheet member and another end portion of the sheet member, which are opposed to each other, and to partially deform the sheet member into a curved shape, to thereby form a convex thread portion or a concave thread portion crossing a principal surface of the sheet member.

Abstract: In a method of producing a glass substrate including a laminate preparing step of laminating a glass film 1 having flexibility and a support glass 2 supporting the same, to prepare a laminate 3; a process step of forming an organic EL device 4 on the glass film 1 in the laminate 3, involving heating; and a peeling step of peeling off the glass film 1 on which the organic EL device 4 is formed from the support glass 2 to obtain a glass substrate 5, a heating step of heating the glass film 1 and the support glass 2 is executed before execution of the laminate preparing step, and the glass film 1 and the support glass 2 are laminated in the condition that they are heated at the time of execution of the laminate preparing step.

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 glass sheet involves forming a scribe in one surface of a glass sheet having a rectangular shape on a periphery of an edge portion of the glass sheet in parallel to the edge portion, and cutting the glass sheet along the scribe as a boundary. The method includes forming the scribe in a region other than both end portions of the glass sheet in a direction along the edge portion; and cutting the glass sheet along a bending portion in which the glass sheet is locally bent, the bending portion being continuously formed in a state of being connected to the scribe and gradually protruding from an edge portion side to an inner side as being shifted away from the scribe.

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 method of manufacturing a glass sheet laminate to be formed by integrally laminating two glass sheets includes: laminating the two glass sheets by bringing surfaces thereof in a vicinity of an outer peripheral portion into surface contact with each other; performing laser fusing so as to cut and remove a part of a surface contact portion under a state in which the surface contact portion has a surface roughness of 2.0 nm or less; and processing a fusing end surface of the surface contact portion into a curved surface and sealing the fusing end surface with heat generated when the laser fusing is performed.

Abstract: Provided is a manufacturing method for a glass sheet, including: fusing a glass ribbon (G) by irradiating the glass ribbon (G) with a laser (L) along a preset cutting line (X), which is a boundary between a product portion (G1) to be used as a product and a non-product portion (G2) to be discarded, and jetting an assist gas (A) onto molten glass (M) generated by melting the glass ribbon (G) through heating with the laser (L) so as to remove the molten glass (M) by scattering the molten glass (M); and breaking the non-product portion (G2) so as to discard the non-product portion (G2), the assist gas (A) being jetted from the product portion (G1) side with respect to the preset cutting line (X), to thereby cause scattered pieces of the molten glass (M) to adhere to the non-product portion (G2) as pieces of dross (D).

Abstract: A cutting method of a multilayer structure containing a brittle layer is provided. The cutting method includes: cutting the multilayer structure to form a cut edge; removing a material of the multilayer structure other than the brittle layer along the cut edge, wherein the material of the multilayer structure other than the brittle layer has a width ranging from 1 micron to 2 millimeter; and modifying an edge of the brittle layer remaining after removing the material of the multilayer structure other than the brittle layer by a laser beam.

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.