Device for producing thread-stitched book blocks
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United States of America Patent
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Jan 18, 2011
Issued Date -
N/A
app pub date -
Apr 13, 2007
filing date -
Apr 20, 2006
priority date (Note) -
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Abstract
A device for producing thread-stitched book blocks from a stack of signatures are arranged flat one on top of the other and are stitched together by stitched seams formed at right angles to the folds by a binding thread passed repeatedly in double strands through the folds of the signatures. The device has a first stitching needle that inserts the binding thread and a second stitching needle that draws the binding thread through the fold from the inside. A punch needle, which passes through the fold from the inside edge to form a punched hole, is arranged opposite the first and second stitching needles, each of which forms a stitched seam. The section of the needle that is used to pierce a fold has a polygonal cross-sectional shape.
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