Vehicle glazings

Abstract

A vehicle glazing provided with a mark indicating a security related attribute of the vehicle. In a laminated glazing the mark is preferably located within the glazing remote from the exterior of the glazing which prevents the mark being soiled and from being damaged or removed from the glazing. The mark may be formed from an ink composition that includes a phosphorescent pigment which enables it to be seen in darkness.

What we claim is:  
     
         1 . A method for indicating that a vehicle glazing is a laminated vehicle glazing comprising: 
 producing a laminated vehicle glazing comprised of a plurality of plies including at least two glass plies and a plastic interlayer positioned between and bonded to the two glass plies, the laminated vehicle glazing having two outer surfaces and a plurality of inner surfaces formed by facing surfaces of the glass plies and the plastic interlayer;    producing a toughened vehicle glazing;    providing at least one of the plurality of plies with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated and thereby visually distinguish the laminated vehicle glazing from the toughened vehicle glazing; and    not providing said means to the toughened vehicle glazing to thereby visually distinguish the toughened vehicle glazing from the laminated vehicle glazing.    
     
     
         2 . The method according to  claim 1 , wherein the providing at least one of the plurality of plies with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated involves applying first and second marks to different ones of the outer and the inner surfaces so that the first and second marks are offset from one another in a manner which produces a parallax effect.  
     
     
         3 . The method according to  claim 1 , wherein the providing at least one of the plurality of plies with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated involves applying the means to one of the inner surfaces of the laminated vehicle glazing.  
     
     
         4 . The method according to  claim 1 , wherein the means provided on at least one of the plurality of plies includes an ink containing a luminescent pigment.  
     
     
         5 . The method according to  claim 1 , wherein the means provided on at least one of the plurality of plies includes an ink containing a phosphorescent pigment.  
     
     
         6 . The method according to  claim 1 , wherein the means provided on at least one of the plurality of plies includes an ink containing fluorescent material.  
     
     
         7 . The method according to  claim 1 , wherein the means provided on at least one of the plurality of plies includes an ink containing reflective material.  
     
     
         8 . A method for producing vehicle glazings comprising: 
 manufacturing a plurality of laminated vehicle glazings each comprised of a plurality of plies including at least two glass plies and a plastic interlayer positioned between and bonded to the two glass plies;    manufacturing a plurality of toughened vehicle glazings;    providing at least one of the plurality of plies associated with each of the plurality of laminated vehicle glazings with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated to thereby visually distinguish the plurality of laminated vehicle glazing from the plurality of toughened vehicle glazings; and    not applying said means to any of the plurality of toughened vehicle glazings so that the plurality of toughened vehicle glazings are visually distinguished from the plurality of laminated vehicle glazings.    
     
     
         9 . The method according to  claim 8 , wherein the providing at least one of the plurality of plies associated with each of the plurality of laminated vehicle glazings with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated involves applying first and second marks to different surfaces of the plurality of plies so that the first and second marks are offset from one another in a manner which produces a parallax effect.  
     
     
         10 . The method according to  claim 8 , wherein the providing at least one of the plurality of plies associated with each of the plurality of laminated vehicle glazings with means for indicating to an observer of the laminated vehicle glazing that the laminated vehicle glazing is laminated involves applying the means to a surface of one of the plies that faces another one of the plies.  
     
     
         11 . The method according to  claim 8 , wherein the means provided on at least one of the plurality of plies includes an ink containing a luminescent pigment.  
     
     
         12 . The method according to  claim 8 , wherein the means provided on at least one of the plurality of plies includes an ink containing a phosphorescent pigment.  
     
     
         13 . The method according to  claim 8 , wherein the means provided on at least one of the plurality of plies includes an ink containing fluorescent material.  
     
     
         14 . The method according to  claim 8 , wherein the means provided on at least one of the plurality of plies includes an ink containing reflective material.  
     
     
         15 . A method for producing vehicle glazings comprising: 
 manufacturing a plurality of vehicle glazings;    providing those of said vehicle glazings that are laminated vehicle glazings, each comprised of a plurality of plies including at least two glass plies and a plastic interlayer positioned between and bonded to the two glass plies, with visual indicating means for visually indicating to an observer that those of said vehicle glazings are laminated vehicle glazings and thereby visually distinguish said laminated vehicle glazings from other vehicle glazings that are not laminated vehicle glazings.    
     
     
         16 . The method according to  claim 15 , including not providing said visual indicating means to any of the vehicle glazings that are not laminated vehicle glazings.  
     
     
         17 . The method according to  claim 15 , wherein the providing of the visual indicating means involves applying first and second marks to different surfaces of the plurality of plies so that the first and second marks are offset from one another in a manner which produces a parallax effect.  
     
     
         18 . The method according to  claim 15 , wherein the providing of the visual indicating means involves applying the visual indicating means to a surface of one of the plies that faces another one of the plies.  
     
     
         19 . The method according to  claim 15 , wherein the visual indicating means includes an ink containing a luminescent pigment.  
     
     
         20 . The method according to  claim 15 , wherein the visual indicating means includes an ink containing a phosphorescent pigment.  
     
     
         21 . The method according to  claim 15 , wherein the visual indicating means includes an ink containing fluorescent material.  
     
     
         22 . The method according to  claim 15 , wherein the visual indicating means includes an ink containing reflective material.  
     
     
         23 . Use of a visual indicating means on a laminated vehicle glazing to visually distinguish the laminated vehicle glazing from other vehicle glazings that are not laminated vehicle glazings comprising: 
 providing vehicle glazings that are laminated vehicle glazings, each comprised of a plurality of plies including at least two glass plies and a plastic interlayer positioned between and bonded to the two glass plies, with visual indicating means for visually indicating to an observer that said vehicle glazings are laminated vehicle glazings, and not providing said visual indicating means to any vehicle glazings that are not laminated vehicle glazings to thereby visually distinguish said laminated vehicle glazings from said vehicle glazings that are not laminated vehicle glazings.    
     
     
         24 . The use method according to  claim 23 , wherein the providing of the visual indicating means involves applying first and second marks to different surfaces of the plurality of plies so that the first and second marks are offset from one another in a manner which produces a parallax effect.  
     
     
         25 . The method according to  claim 23 , wherein the providing of the visual indicating means involves applying the visual indicating means to a surface of one of the plies that faces another one of the plies.  
     
     
         26 . The method according to  claim 23 , wherein the visual indicating means includes an ink containing a luminescent pigment.  
     
     
         27 . The method according to  claim 23 , wherein the visual indicating means includes an ink containing a phosphorescent pigment.  
     
     
         28 . The method according to  claim 23 , wherein the visual indicating means includes an ink containing fluorescent material.  
     
     
         29 . The method according to  claim 23 , wherein the visual indicating means includes an ink containing reflective material.