Selectively 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
ApplicationNo. 381558 filed on 09/17/1999
US 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 laminae
ExaminersPrimary: Ball, Michael W.
Assistant: Haran, John T.
Attorney, Agent or Firm
Foreign Patent References
International ClassesB32B 031/20
Foreign Application Priority Data1997-03-19 DE
AbstractThis 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