Book-binding method for saddle-stitched bound book

A bookbinding method for a saddlestitched bound book, comprising the steps of:

• sequentially feeding body signatures from a plurality of body signature feeders which are disposed in parallel to conveying means below said body signature feeders and stacking said body signatures on said conveying means;
• obtaining a back-saddle-stitched book of said body signatures by back-saddle-stitching a back portion of said stacked body signatures from below;
• sequentially transferring said obtained back-saddle-stitched book to clamping means of another conveying means in a 180.degree.-reversed attitude with a back thereof facing down;
• spraying paste onto said down-facing back of said back-saddle-stitched book halfway during conveyance by said conveying means;
• feeding said back-saddle-stitched book sprayed with said paste to a top of a cover signature which is fed from a cover signature feeder to a downstream side of said conveying means and is on standby in a temporarily stopped state independently of a motion of said conveying means;
• bonding said cover signature to the back side of said back-saddle-stitched book by clamping said back side via still another clamping means while conveying said back-saddle-stitched book together with said cover signature;
• and, after releasing said back-saddle-stitched book from said clamping means, decoratively cutting head, tail and fore edge margins by using a three-side trimmer to obtain a saddle-stitched bound book.

A bookbinding method for a saddle-stitched bound book, comprising the steps of:

• sequentially feeding body signatures from a plurality of body signature feeders which are disposed in parallel to conveying means below said body signature feeders and stacking said body signatures on said conveying means;
• obtaining a front-saddle-stitched book of said body signatures by saddle-stitching a back portion of said stacked body signatures from above;
• feeding said front-saddle-stitched book to a front-saddle-stitched signature feeder;
• meanwhile, sequentially feeding body signatures from a plurality of body signature feeders which are disposed in parallel to conveying means below said body signature feeders and stacking said body signatures on said conveying means;
• obtaining a back-saddle-stitched book of said body signatures by back-saddle-stitching a back portion of said stacked body signatures from below;
• spraying paste along a predetermined width on a back surface of said back-saddle-stitched book;
• feeding said front-saddle-stitched book from said front-saddle-stitched signature feeder to the top of said back-saddle-stitched book;
• bonding said front-saddle-stitched book to a back side of said back-saddle-stitched book to obtain a composite saddle-stitched book;
• and
• obtaining a saddle-stitched bound book by decoratively cutting head, tail and fore edge margins of said composite saddle-stitched book via a three-side trimmer.

A bookbinding method for a saddle-stitched bound book comprising the steps of:

• sequentially feeding body signatures from a plurality of body signature feeders which are disposed in parallel to conveying means below said body signature feeders and stacking said body signatures on said conveying means;
• obtaining a front-saddle-stitched book of said body signatures by saddle-stitching a back portion of said stacked body signatures from above;
• feeding said front-saddle-stitched book to a front-saddle-stitched signature feeder;
• meanwhile, sequentially feeding body signatures from a plurality of body signature feeders which are disposed in parallel to conveying means below said body signature feeders and stacking said body signatures on said conveying means;
• obtaining a back-saddle-stitched book of said body signatures by back-saddle-stitching a back portion of said stacked body signatures from below;
• spraying paste onto along a predetermined width on a back surface of said back-saddle-stitched book;
• feeding said front-saddle-stitched book from said front-saddle-stitched signature feeder to the top of said back-saddle-stitched book;
• bonding said front-saddle-stitched book to a back side of said back-saddle-stitched book to obtain a composite saddle-stitched book;
• sequentially transferring said composite saddle-stitched book to clamping means of another conveying means in a 180.degree.-reversed attitude with its back facing down;
• spraying paste onto the lower surface of a back portion of said composite saddle-stitched book halfway during conveyance by said conveying means;
• feeding said composite saddle-stitched book sprayed with said past to the top of a cover signature which is fed from a cover signature feeder to a downstream side of said conveying means and is on standby in a temporarily stopped state independently of a motion of said conveying means;
• bonding said cover signature to the back side of said back-saddle-stitched book by clamping said backside via another clamping means while conveying said composite saddle-stitched book together with said cover signature;
• and, after releasing said composite saddle-stitched book from said clamping means, decoratively cutting head, tail and fore edge margins by using a three-side trimmer to obtain a saddle-stitched bound book.