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US 5,443,669 AGranted
Process for producing a laminated glass pane, especially for a motor vehicle
AssigneeFlachglas Aktiengesellschaft
InventorGerhard Tunker
Life of this patent
Estimating the term…
Abstract
In the production of a glass laminate wherein two panes are subjected to deformation with single or double curvature, a screen-printed pattern on at least one of the panes is dried by heating below 300.degree. C. to evaporate the printing oil before the panes are stacked for deformation and simultaneously baking on the dry enamel pattern. The panes are then separated, a plastic sheet interposed and the resulting stack is bonded to form the laminate.
Claims14
A process for producing a curved glass laminate, comprising the steps of:
- (a) forming a screen-printable enamel ink consisting essentially of a glass-flux paste, at least one ceramic pigment, a binder forming component and an organic screen-printing oil volatile at a temperature below 300.degree. C.;
- (b) screen-printing said enamel ink in a predetermined pattern on one side of a first flat glass pane;
- (c) drying said ink in said pattern at a drying temperature at which said screen-printing oil is volatile and below 300.degree. C. to evaporate said screen-printing oil from the ink in said pattern and dry said pattern without firing of said enamel ink;
- (d) placing said pane with the dry pattern and another glass pane on top of one another with said other glass pane lying against said one side to produce a paired stack of said panes and heating said stack to a temperature sufficient to soften the glass of said panes, and bending said stack with at least a single curvature at a pane-deformation temperature sufficient to effect bending of said panes and baking of the dry pattern only on said one side of said first pane simultaneously with the bending to produce curved panes in said stack;
- (e) separating said curved panes from one another;
- (f) interposing between the separated panes a plastic sheet bondable to said panes and forming another stack of said panes with said plastic sheet between them;
- and
- (g) heating said other stack to simultaneously bend said panes and said plastic sheet to effect a double curvature and to bond said other stack together into said curved glass laminate.
5 more elements
A process for producing a curved glass laminate, comprising the steps of:
- (a) forming a screen-printable enamel ink consisting essentially of a glass-flux paste, at least ceramic pigment, a binder-forming component containing a metal alcoholate selected from the group which consists of aluminum, titanium, zirconium and boron alcoholates, and an organic screen-printing oil volatile at a temperature below 300.degree. C. and selected from the group which consists of terpine oil, ethylene glycol and mixtures thereof;
- (b) screen-printing said enamel ink in a predetermined pattern on one side of a first flat glass pane;
- (c) drying said ink in said pattern at a drying temperature at which said screen-printing oil is volatile and below 300.degree. C. to evaporate said screen-printing oil from the ink in said pattern and dry said pattern without firing of said enamel ink;
- (d) placing said pane with the dry pattern and another glass pane on top of one another with said other glass pane lying against said one side to produce a paired stack of said panes and heating said stack to a temperature sufficient to soften the glass of said panes, and bending said stack with at least a single curvature at a pane-deformation temperature sufficient to effect bending of said panes and baking of the dry pattern on said one of said panes only simultaneously with the bending to produce curved panes in said stack;
- (e) separating said curved panes from one another;
- (f) interposing between the separated panes a plastic sheet bondable to said panes and forming another stack of said panes with said plastic sheet between them;
- and
- (g) heating said other stack to bond said panes and said plastic sheet into said curved glass laminate.
5 more elements
Dependencies are inferred from the claim text.