METHOD AND APPARATUS FOR SEWING BOOK BLOCKS WITHOUT BLIND STITCH BY MEANS OF HOOKS
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United States of America Patent
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Issued Date -
Feb 29, 2024
app pub date -
Jan 31, 2022
filing date -
Feb 25, 2021
priority date (Note) -
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Abstract
A solution is proposed for sewing book blocks (155). A corresponding method comprises, for each book block (155f), forming one or more stitchings (230,235) with corresponding threads (205) ending with corresponding free loops (305) on a last signature (115N) of the book block (155f). The threads (205) are brought in line with corresponding free loops (305) and thus through them along an advancement line of the signatures (115). The threads (205) are moved away from the free loops (305) by means of corresponding hooks (255), with the threads (205) sliding relative to the hooks (255) in this phase, thereby tightening each free loop (305) around its thread (205). After that, the threads (205) are cut. A corresponding bookbinding sewing machine (100) and a bookbinding plant are also proposed.
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