Method of thread stitching layers to form a sewn book
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United States of America Patent
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Aug 25, 1981
Issued Date -
N/A
app pub date -
Jan 21, 1980
filing date -
Feb 14, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for thread stitching layers to form a book wherein the stitching apparatus comprises a conveying mechanism for transporting a plurality of open layers in spaced relation to each other, the conveying device transporting the layers with respect to at least one spiral sewing needle which is rotationally driven, the point of the spiral needle penetrating into the layer backs and exiting the layer backs to stitch the layers together in sequence.
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