Building boards and printing method used for the same

Abstract

In a building board having a designed surface with pattern convex portions, and upper and lower shiplap portions, both of which are formed in the end portion of the designed surface, a printing extension portion is formed in the lower shiplap1 portion, and the printing extension portion is printed in such a way that the extension portion and the pattern convex portion are continuously formed.

1 . A building board having a designed surface with pattern convex portions, and upper and lower shiplap portions, both of which are formed in the end portion of said designed surface, wherein 
 a printing extension portion is formed in said lower shiplap portion, and said printing extension portion is printed in such a way that said extension portion and said pattern convex portion are continuously formed.    
   
   
       2 . The building board according to  claim 1 , wherein 
 said printing extension portion has the same width as that of said pattern convex portion, and has the same pattern and color as those of a part of said pattern convex portion.    
   
   
       3 . The building board according to  claim 1 , wherein 
 said printing extension portion has a center portion having the same pattern and color as those of a part of said pattern convex portion and auxiliary portions at the both sides of said center portion, and the pattern and color for said auxiliary portions are the same as those of a part of said center portion.    
   
   
       4 . The building board according to  claim 3 , wherein 
 the brightness of the pattern and color for said auxiliary portions is lower than that of the pattern and color of said pattern convex portion.    
   
   
       5 . The building board according to  claim 3 , wherein 
 said center portion has a left side portion and a right side portion along the direction of axis line of said pattern convex portion, said left side portion has the same pattern and color as those of a part of said pattern convex portion, and said right side portion has the same pattern and color as those of a part of a pattern convex portion on an abutting building board on the right side.    
   
   
       6 . The building board according to  claim 1 , wherein 
 said printing extension portion has a center portion having the same pattern and color as those of a part of said pattern convex portion and auxiliary portions at the both sides of said center portion, and at least one of said auxiliary portions projects outward from the edge of said pattern convex portion.    
   
   
       7 . A method for printing a building board, comprising; 
 displaying, on a screen of a display device connected to a computer, images of two right and left building boards which are arranged abutting to each other and each of which has a designed surface with pattern convex portions, and upper and lower shiplap portions, both of which are formed in the end portion of said designed surface;    forming an image in a printing region on the screen of said display device by cutting out a portion with a predetermined width from said image in said pattern convex portion on said building board on the left side, cutting out a portion with a predetermined width from said image in said pattern convex portion on said building board on the right side, and joining said portions; and    printing said image in said printing region in such a way that said lower shiplap portion on said building board and said pattern convex portion are continuously formed when said pattern convex portion on said building board is printed.    
   
   
       8 . The method for printing a building board according to  claim 7 , wherein 
 said forming an image in a printing region further includes jointing images in printing regions which are extended to portions on and under said image in said jointed printing regions.