Patent ID: 7493840

Claim:
A three-side trimmer adapted to cut top and bottom edges ( 1 a, 1 b ) and front edge ( 1 c ) of a bound material ( 1 ) by means of a single trimming cutter while rotating the bound material ( 1 ) at every predetermined angle, comprising: a bound material feed unit ( 2 ) for feeding the bound material ( 1 ) one by one; a rotating table unit ( 3 ) having a table ( 10 ) for receiving the bound material ( 1 ) from said bound material feed unit ( 2 ) at a predetermined position and rotating the bound material at every predetermined angle in such a manner that the bound material is arranged at three positions of a top edge cutting position, a front edge cutting position and a bottom edge cutting position; a trimming unit ( 4 ) arranged for movement in a direction close to or away from said rotating table unit ( 3 ) between two positions of a cutting position at which said trimming unit ( 4 ) becomes close to said rotating table unit ( 3 ) so as to cut a top edge section ( 1 a ), a bottom edge section ( 1 b ) and a front edge section ( 1 c ) of the bound material ( 1 ), respectively, and a stand-by position at which said trimming unit ( 4 ) is away from said rotating table unit( 3 ); trimming unit guide means ( 5 ) arranged between said rotating unit ( 3 ) and said trimming unit ( 4 ); drive means ( 6 ) for moving said trimming unit ( 4 ) along said trimming unit guide means ( 5 ) between said cutting position and said stand-by position; a control unit ( 7 ) for controlling the operation of each of said rotating table unit ( 3 ), said trimming unit ( 4 ) and said drive means ( 6 ) in such a manner that said trimming unit ( 4 ) moves from said stand-by position to said cutting position for cutting the top edge section ( 1 a ), the front edge section ( 1 c ) and the bottom edge section ( 1 b ) of the bound material ( 1 ), respectively every time the bound material ( 1 ) is arranged at said top edge cutting position, said front edge cutting position and said bottom edge cutting position, said three-side trimmer characterized by receiving position changing means for horizontally shifting the position at which the table ( 10 ) of said rotating table unit ( 3 ) receives the bound material ( 1 ) from said bound material feed unit ( 2 ).