Patent ID: 7794169
Filing Date: 2010-09-14
Classification: B42C

Abstract:
1. A bookbinding apparatus comprising: sheet stacking means for stacking sheets into bundles; adhesive applicator means for applying adhesive to a spine part of a sheet bundle from said sheet stacking means; cover-sheet feeding means for feeding cover sheets to a binding position located below said adhesive applicator means; cover-sheet binding means for binding a cover sheet, in the binding position, together with a spine part of the sheet bundle from said adhesive applicator means, said cover-sheet binding means including shift means for shifting said left-and-right pair of spine-creasing press members between a predetermined home position, a spine-creasing position where, after joining of the cover sheet and the sheet bundle, said spine-creasing press members fold the cover sheet over the bundle, a standby position situated in between the home position and the spine-creasing position, and a cover-sheet guide position in which, when a cover sheet is being fed by said cover-sheet feeding means to the binding position, said spine-creasing press members guide the cover sheet, wherein control means for controlling said shift means, said control means being furnished with at least one of: (1) means for varying, in accordance with the thickness of the sheet bundle, the standby position of said second of the press members; (2) means, whose distance from the standby position of the first of the spine-creasing press members to the standby position of the second of the spine-creasing press members is set fixed, for varying, in accordance with the thickness of the sheet bundle, the start time of an operation to shift said second of the spine-creasing press members from the standby position of said second of the spine-creasing press members to the spine-creasing position; and (3) means, whose distance from the standby position of the first of the spine-creasing press members to the standby position of the second of the spine-creasing press members is set fixed, for varying, in accordance with the thickness of the sheet bundle, the traveling speed of said second of the spine-creasing press members in shifting from the standby position of said second of the spine-creasing press members to the spine-creasing position.