BOOK BLOCK FORMING APPARATUS

A first press unit 2 presses each of a plurality of signatures S along a fold f thereof, the signatures being supplied one at a time with the fold f facing forward. Subsequent to the first press unit is arranged a signature conveyance unit 3 that conveys each signature received from the first press unit while controlling the attitude thereof so as to make the fold orthogonal to the conveyance direction. Subsequent to the signature conveyance unit is arranged a gluing unit 4 that applies glue to both lateral edges of a top surface of each signature received from the signature conveyance unit. Subsequent to the gluing unit is arranged an accumulation unit 5 that sequentially stacks the signatures received from the gluing unit on one another while jogging the stacked signatures to form a book block B. Subsequent to the accumulation unit is arranged a second press unit 6 that discharges the book block received from the accumulation unit after pressing the same along the folds.