Woodworking – Process – Securing
Reexamination Certificate
2003-03-26
2003-12-23
Friedman, Carl D. (Department: 3635)
Woodworking
Process
Securing
C144S345000, C144S346000, C144S347000, C144S358000, C052S592100
Reexamination Certificate
active
06666244
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a building board and the manufacturing method thereof. In particular, the present invention relates to a building board which is improved in the structure of side joint portions thereof so as to ensure the continuity of design or pattern between neighboring building boards having such a design or pattern, thereby making it possible to enhance the external decorative appearance of entire board siding, and to the manufacturing method thereof.
2. Description of the Related Arts
At present, about 70% of siding board for building is occupied by a ceramic type siding board, and the design or pattern thereof tends to become increasingly elaborate and complicated. However, even if each unit of siding board is made elaborate in design, it would be impossible to obtain a satisfactory external decorative appearance of entire board siding if the continuity of design or pattern is lost at the joint portion between neighboring siding boards. Since ceramic type building boards (or siding boards) are generally manufactured in the form of lengthy plate, a linear gap is unavoidably formed at the joint portion between neighboring building boards in the ordinary situation, thereby making it difficult to secure the continuity of design or pattern at this joint portion. This problem will be encountered not only in the case of butt joint work but also in the case of shiplap joint work.
In the case of a building board having a masonry pattern such as a brick-like pattern or a tile-like pattern which is popularly employed as a design for ceramic type building boards, various ideas have been proposed so as to prevent the joint portion between neighboring boards from standing out. For example, Japanese Patent Unexamined Publication 2000-129886; Japanese Patent Unexamined Publication H9-144268; Japanese Patent Unexamined Publication H9-150111; Japanese Utility Model Unexamined Publication H3-78828; and Japanese Utility Model Unexamined Publication S56-112321 propose various measures so as to prevent the joint portion between neighboring boards from standing out even in a situation wherein the masonry pattern applied to a building board is partially separated into two, i.e. a portion of the unit design is applied to one of neighboring pair of building boards and the remaining portion of the unit design is applied to the other building board, these separated portions of unit design being subsequently integrated into a complete unit design when the pair of building boards are joined together. On the other hand, Japanese Utility Model Unexamined Publication S63-21323 discloses an idea wherein each unit design of pattern is not separated but is entirely placed on either one of neighboring pair of building boards, thereby allowing it to partially protrude from said either one of neighboring pair of building boards, and this protruded portion of unit design is allowed to extend over one side portion of the other one of neighboring pair of building boards when the neighboring pair of building boards are joined together, thereby preventing the joint portion from standing out.
However, the aforementioned idea of separating one unit design into two parts which are subsequently integrated into a complete unit design when the pair of building boards are joined together so as to secure the continuity of pattern is accompanied with a problem that although the entire molding work of the building board including the molding work of the side joining portion thereof may be simplified, it is impossible to completely hide the linear contact line (joint line), exposing it from the surface of pattern, and hence the idea is not satisfactory in terms of ensuring the continuity of designed pattern as a whole. Further, it would be impossible to prevent rain water from entering into the rear side of the building board through a gap to be formed at the linear joint portion appearing all over the surfaces of building boards.
On the other hand, the aforementioned idea of entirely placing the unit design on either one of neighboring pair of building boards, thereby allowing it to partially extend over one side portion of the other one of neighboring pair of building boards when the neighboring pair of building boards are joined together, maybe advantageous in the respects that it is possible to secure the integration of pattern and to prevent the joint line from standing out as the joint line is interrupted by the crossing of the protruded portion of unit design, thus making it possible to obtain a satisfactory appearance of building wall, and that the gap at the joint portion can be partially covered by the surface portion of the building board, thereby making the gap discontinuous, and hence making it possible to prevent the invasion of most of rain water. However, it would be difficult to perform the molding work of the side portion (or joint portion) of the building board, so that it would be difficult to actually employ this method in the case where a large quantity of building boards are required to be continuously molded.
This invention has been accomplished in view of the aforementioned circumstances, and the object of this invention is to provide a building board which makes it possible to easily perform the entire molding work thereof including the molding work of the side joining portion thereof, to ensure the integration of pattern as a whole, and to hide the joint line between a pair of neighboring building boards from outside due to the covering of most of the joint line by the pattern, thus obtaining a satisfactory external appearance of a building wall exhibiting an excellent continuity of design or pattern as a whole, and effectively preventing invasion of rain water from the surface of the building wall.
SUMMARY OF THE INVENTION
Namely, the building board to be provided by the present invention for solving the aforementioned problem is featured in that it is provided on the surface thereof with a concave and convex pattern, and on at least opposite sides thereof with at least one overlying rabbeted portion and at least one underlying rabbeted portion, respectively, wherein each overlying rabbeted portion is constituted by one end portion of the convex portion of said pattern; each underlying rabbeted portion is constructed to have an area bigger than the area of corresponding overlying rabbeted portion bearing said convex portion and formed on the opposite side; and each of said opposite sides is provided on the rear side thereof with a linear contact surface.
Preferably, each convex portion has a shape like an island, and these overlying rabbeted portions and underlying rabbeted portions are disposed on the sides of the building board in a manner to avoid the formation of a linear joint on the external surface of the building board as a couple of building boards are coupled with each other.
According to the building board mentioned above, the coupling of neighboring pair of building boards is performed by two ways of joint, i.e. so-called butt joint wherein a couple of the linear joints formed on the rear side of the building board are contacted face to face, and so-called shiplap joint wherein an overlying rabbeted portion of one of the building boards is superimposed over an underlying rabbeted portion of the other building board. In this case, the butt joint portion is hidden by the shiplap joint covering the front side of the butt joint portion, so that any gap formed by the butt joint can be hardly recognized as it is viewed externally, and even if the gap can be externally recognized, only a discontinuous state thereof can be recognized, thus not giving any incompatibility to anyone. Further, since the gap at the butt joint portion can be covered by the shiplap joint portion, the area of the gap to be exposed from the surface of the building board can be minimized, thereby effectively inhibiting the aforementioned invasion of rain water. Furthermore, since the convex portion which is disposed on a side portion of the buildin
Amiri Nahid
Friedman Carl D.
Nichiha Corporation
Shook Hardy & Bacon LLP
LandOfFree
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