# US 10,370,896 B2 · Joined unit of glass base members, and airtight envelope > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,896 B2 - Document ID: US10370896B2 - Status: Granted - Kind: B2 - Application number: 13/688,324 - Filed: 2012-11-29 - Published: 2013-07-04 - Granted: 2019-08-06 - Earliest claimed: 2009-10-30 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Mamo Matsumoto; Tomohiro Saito; Matsutaka Maeda; Nobuhiro Ito; Toshitami Hara - Web page: https://patentgrep.com/patent/US10370896B2 ## CPC - E06B 5/00: Doors, windows, or like closures for special purposes {(insulated compound frames specially adapted for sliding doors or windows E06B3/26347)}; Border constructions therefor - B32B 3/263: {characterised by a layer having non-uniform thickness} - C03C 27/06: Joining glass to glass by processes other than fusing (fusing C03B23/20; units for use as elements for closing wall or like openings and comprising two or more parallel glass panes in spaced relationship, the panes being permanently secured together E06B3/66) - Y10T 428/24562: Interlaminar spaces - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A joined unit of glass base members is provided, comprising first and second glass base members and a joining member which extends along opposing surfaces of the first and second glass base members, wherein glass base member is elastically deformed while being depressed in an internal direction of the glass base member in the vicinity of an end portion in a widthwise direction of the joining member, a boundary surface between the elastically deformed glass base member and the joining member and a surface of the elastically deformed glass base member, which are disposed in the vicinity of the end portion in the widthwise direction of the joining member, are positioned on an internal side of the glass base member, and an area, in which a residual stress is a compressive stress, is formed in the vicinity of the end portion in the widthwise direction of the joining member. ## Claims ### Claim 1 A joined unit of glass base members, comprising: a first glass base member; a second glass base member; and a joining member which joins the first glass base member and the second glass base member, the joining member (a) having a viscosity that has a negative temperature coefficient, and (b) extending at a predetermined width along opposing surfaces of the first glass base member and the second glass base member, wherein at least one of the first glass base member and the second glass base member is elastically deformed while being depressed in an internal direction of the glass base member at an end portion in a widthwise direction of the joining member, wherein a boundary between an elastically deformed portion of the glass base member and the joining member is positioned farther toward an internal side of the glass base member as compared with a boundary between a non-elastically deformed portion of the glass base member and the joining member, wherein an area formed at the end portion in the widthwise direction of the joining member has a residual stress in a thickness direction of the joining member that is a compressive stress, and wherein the area formed at the end portion in the widthwise direction of the joining member has a greater compressive stress than a compressive stress of an area formed at a central portion in the widthwise direction of the joining member. ### Claim 2 (depends on 1) The joined unit of glass base members according to claim 1, wherein the area formed at the central portion in the widthwise direction of the joining member has a residual stress in the thickness direction of the joining member that is a compressive stress, and wherein an area having a residual stress in the thickness direction of the joining member that is a tensile stress is formed adjacently to (a) the area formed at the central portion in the widthwise direction of the joining member and which has a compressive stress and (b) the area formed at the end portion in the widthwise direction of the joining member and which has a compressive stress. ### Claim 3 An airtight envelope comprising: a first glass base member; a second glass base member; and a joining member which joins the first glass base member and the second glass base member, the joining member (a) having a viscosity that has a negative temperature coefficient, and (b) extending at a predetermined width along opposing surfaces of the first glass base member and the second glass base member, wherein at least one of the first glass base member and the second glass base member is elastically deformed while being depressed in an internal direction of the glass base member at an end portion in a widthwise direction of the joining member, wherein a boundary between an elastically deformed portion of the glass base member and the joining member is positioned farther toward an internal side of the glass base member as compared with a boundary between a non-elastically deformed portion of the glass base member and the joining member, wherein an area formed at the end portion in the widthwise direction of the joining member has a residual stress in a thickness direction of the joining member that is a compressive stress, and wherein the area formed at the end portion in the widthwise direction of the joining member has a greater compressive stress than a compressive stress of an area formed at a central portion in the widthwise direction of the joining member. ### Claim 4 (depends on 3) The airtight envelope according to claim 3, wherein the area formed at the central portion in the widthwise direction of the joining member has a residual stress in the thickness direction of the joining member that is a compressive stress, and wherein an area having a residual stress in the thickness direction of the joining member that is a tensile stress is formed adjacently to (a) the area formed at the central portion in the widthwise direction of the joining member and which has a compressive stress and (b) the area formed at the end portion in the widthwise direction of the joining member and which has a compressive stress. ### Claim 5 (depends on 3) An image display apparatus comprising: the airtight envelope according to claim 3; and an image forming member at any one of: (a) the first glass base member and (b) the second glass base member, wherein the image forming member is located in an interior of the airtight envelope.