Patent ID: 6203168
Filing Date: 2001-03-20
Classification: E04F

Abstract:
A process for using an illuminating box for facilitating the level installation of tiles of the type which have a planar upper surface, said illuminating box having a housing having a top and four sides, said four sides comprising a front side, a right side, a left side, and a back side, said top and four sides being substantially opaque and forming an interior chamber, a source of light within said interior chamber of said housing, said source of light being completely surrounded by said top and four sides, said four sides having bottom edges aligned in a single plane and define a footprint, said process comprising:laying at least two tiles on a substrate, one of said tiles being a base tile and another of said at least two tiles being an adjacent tile;turning on said source of light;placing said housing so that its bottom edges are coplanar with said base tile and so that the footprint extends over at least a portion of said adjacent tile resulting in an observable light pattern; andobserving said light pattern for a sign of any light shining between the housing and planar upper surfaces of said at least two tiles whereby any lack of coplanarity can be observed.