Patent ID: 7874749

Claim:
An apparatus equipped in a passbook printing available printer, for turning pages of a passbook that is unfolded on both sides of a folding axis, comprising: a conveying path through which the passbook is conveyed; a detecting device placed in a position of the conveying path, for detecting a size of the pages of the passbook; storing means for storing a passbook holding position on the conveying path corresponding to the size, and a threshold value corresponding to the size; a page turning mechanism placed in a vicinity of the passbook holding position and configured to buckle a paper of a turning target page of the passbook conveyed to the passbook holding position and to turn the buckled paper about a folding axis until the paper is overlapped on a previous page of the turning target page; a buckling sensor placed in a vicinity of the page turning mechanism, for sensing a buckling status for the paper; a conveying mechanism for conveying with a driving control the passbook to a designated position on the conveying path; and control means configured to recognize the passbook holding position corresponding to the size and the threshold value corresponding to the size by referencing the storing means, drive the conveying mechanism so that the passbook is conveyed to the passbook holding position, and drive the page turning mechanism so that it starts buckling of the paper, wherein the control means, if the buckling status sensed by the buckling sensor indicates that an extent of the buckling does not reach over the threshold value within a predetermined time, determines that the buckling has failed and drives the conveying mechanism so that the passbook is conveyed from the passbook holding position to a first revised position apart from the passbook holding position by a first adjusting distance.