1 EP 3 800 017 A1 2  fore-edge portion except the cover can be cut off. How- ever, the cover opening portion comprises complex dif- ferent parts. As a result, the above conventional trimmer is not excellent in productivity and cost. [0001] The present invention relates to a trimmer for trimming a bound material. 5 10 15 [0006] Itisan objectofthe presentinvention to provide atrimmerthatcan trimthe fore-edge portion ofthe bound material except the cover and that can be excellent in productivity and cost. 20 [0002] A conventional trimmer is described in, for ex- ample, Patent Document 1. The trimmer comprises: a single trim cutter reciprocated in a vertical direction and between a non-trimming position and a trimmingposition; and a table forpositioning the bound materialplaced ther- eon. In this conventional trimmer, an operator puts the bound materialon the table andpositions itproperly,and then movesthe trimcutterfromthenon-trimming position to the trimming position so as to cut an edge portion of the bound material. The operator rotates and positions the bound materialat each oftop, bottom, and fore-edge trimming positions, sequentially. The operator recipro- cates the trim cutter at each of the positions so as to cut each of the top, bottom and fore-edge portions. Thus, each of the edge portions of the bound material trimmed. [0007] In order to achieve the object, the present ap- plication provides a trimmerfor trimming an edge portion of a bound material. [0008] The trimmer that trims a bound material which has abookblockand a coverattached tothe bookblock, the cover having flap portions adjacent to the fore-edge portion of the bound material, the trimmer comprising: [0003] The other conventional trimmer described in, for example, Patent Document 2 is a three-side trimmer. The three-side trimmer comprises: a single trim cutter reciprocated in a vertical direction between a non-trim- ming position and a trimming position; a table for posi- tioning a bound material placed thereon; and a rotate mechanism for rotating the table. A feeding mechanism supplies the bound material on the table, and the table with the bound material is rotated so as to position the bound materialateach oftop,bottomand fore-edge trim- ming positions by the rotate mechanism. Then, the trim cutter reciprocates ateach of the positionstocutthe top, bottom, and fore-edge portions. 30 35 25 a trim cutter that trims the bound material; a blade receiving portion that receives an edge of the trim cutter; a base portion and a pressure portion that nip and position the bound material; and a pair of guide portions arranged for movement in a direction close to or away from the bound material, wherein the guide portions are inserted between the book block and the cover so as to peel the cover together with the flap portions up when the fore-edge portion of the bound material is trimmed by the trim cutter. 40 [0004] By the way,asshown in Fig.1,abound material 1 comprises a book block 51 and a cover 50 attached to the book block 51. The cover 50 comprises flap portions 50a adjacent to the fore-edge portion 1c of the bound material 1. For example, a brief summary of a content of the bound material, an author’s background description or things like that is described on the flap portions 50a at the side of the book block 51. In this case, the flap portions 50a may be undesirably cut off when the fore- edge portion 1c of the bound material 1 is trimmed by the above conventional trimmer. 45 [0009] According to a preferred embodiment of the present application, wherein each of the guide portions is attached to each of the base portion and the pressure portion. [0010] According to a preferred embodiment of the present application, wherein each of the guide portions is inclined relative to face and reverse surfaces of the book block, and the guide portions are widened toward the trim cutter. [0011] According to a preferred embodiment of the present application, wherein, when the fore-edge portion of the bound material trimmed by the trim cutter, the book block is projected from the cover, one end por- tions of the guide portions are contacted with the face and reverse surfaces of the project portion of the book block, [0005] The otherconventional trimmer is described in, for example, Patent Document 3. The trimmer is called as a fore-edge trimmer,whichcantrimthe fore-edge por- tion of the bound material except the cover in order not to cutthe flap portionsoff.The trimmercomprises a trim- ming portion that trims the bound material, and a cover opening portion thatopens the cover.The boundmaterial is conveyed to the trimming portion through the cover opening portion, so that the cover can be open and the 55 50 Description TECHNICAL FIELD OF THE INVENTION BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION SOLUTION TO THE PROBLEMS 2 Patent Document 1: JP 2004-066347 A Patent Document 2: US 7493840 B Patent Document 3: JP 2005-219168 A