Process for producing a curved laminated safety glass sheet
Patent 6261398 Issued on July 17, 2001. Estimated Expiration Date: 
September 17, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 17, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSelectively light transmitting film and preformed laminar structure Dimensional stabilizing process Forming a shaped prelaminate and bilayer glazing of glass and plastic Process forming a shaped laminate Preparation of glass/plastic laminates having improved optical quality Patent #: 5631089 InventorAssigneeApplicationNo. 381558 filed on 09/17/1999US Classes:156/102, With deformation or shaping of interlayer and/or lamina156/103, With application of plural sequential pressures156/104, With air evacuation between laminae156/106, With preformed intermediate adhesive layer156/286To remove gas from between assembled laminaeExaminersPrimary: Ball, Michael W.Assistant: Haran, John T. Attorney, Agent or FirmForeign Patent References
International ClassesB32B 031/20B32B 017/00 Foreign Application Priority Data1997-03-19 DEAbstractThis invention concerns a process for producing a curved, laminated safety glass sheet from a first curved glass sheet (1), a first laminated layer (2), a thermoplastic substrate sheet (4) with a biaxially drawn thin-layer system (3), a second laminated layer (5), and a second curved glass sheet (10) conforming to the first one. To avoid formation of folds in the substrate layer, the process has the following steps: (a) a prelaminated sheet consisting of the first laminated layer (2) and the substrate sheet (4) is superimposed with its laminated layer facing the first glass sheet, (b) a bend-resistant cover sheet (10) conforming to the first glass sheet (1) is superimposed on the prelaminated sheet, (c) the glass layer packet formed out of the first glass sheet (1) and the prelaminated sheet with the cover sheet (10) superimposed upon it is preliminarily bonded by removing the air and subjecting it to pressure and heat, (d) the cover sheet (10) is removed, (e) the second laminated layer (5) and the second glass sheet (10) are superimposed on the preliminarily bonded glass-film pocket, (f) the laminate so formed is preliminarily bonded by removing the air and subjecting it to pressure and heat, (g) the preliminarily bonded laminate is finally bonded into a laminated safety glass sheet by subjecting it to pressure and heat.Field of SearchOptically transparent glass sandwich making (e.g., window or filter)With deformation or shaping of interlayer and/or lamina With application of plural sequential pressures With air evacuation between laminae With preformed intermediate adhesive layer By bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith To remove gas from between assembled laminae | |
