US 7,946,565 B2Granted

Bookbinding apparatus and image-forming system equipped with the same

AssigneeNisca Corporation

InventorsKazuyuki Kubota, Kazuhide Sano, Tadahito Takano, Shinya Sasamoto, Yutaka Amemiya, Isao Kondo, Kenichi Yoshimura

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Abstract

Imaging-system bookbinding apparatus avoids cutting any folded sheets mixed into booklets it trims. Furnished with: an imaging unit; a sheet-folding unit that folds imaging-unit sheets; a stacking unit that stacks sheets from the sheet-folding or image-forming units; a cover-sheet binding unit that encases stacking-unit sheet bundles with, and binds them into, cover sheets; a trimming unit that trims true the bundle fore-edge; and a fold-position computing unit that determines where a sheet is pleated by the sheet-folding unit. The sheet-folding unit has a sheet conveyance path along which folded sheets are transported elsewhere than the stacking unit, while the fold-position computing unit in a first control mode transports to the stacking unit sheets folded over by the sheet-folding unit, and in a second control mode transports them from the sheet conveyance path elsewhere than the stacking unit.

Claims12

Dependent claims

A bookbinding apparatus comprising:

sheet-folding means for folding over sheets delivered sequentially from an incoming sheet conveyance path;
stacking means for collating and stacking sheets from at least either said sheet-folding means or said incoming sheet conveyance path;
binding-process means for binding together spine-portion edges of a sheet block from said stacking means;
trimming means for trimming true the open edges of a sheet block that has been bound into a bundle;
folding-position computing means for determining sheet position of folds made by the sheet folding means;
and
trim-amount computing means for computing length to which said trimming means trims;
wherein
said folding-position computing means is configured to preestablish, when a sheet is Z-folded by said sheet folding means, the position where the sheet is folded inward toward its spine portion, based on the trim depth, gotten from said trim-amount computing means, for the sheet fore-edge portion.

6 more elements

Dependencies are inferred from the claim text.