Multifunctional rotary tool for bookbinding machines and a bookbinding machine
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United States of America Patent
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Aug 18, 2020
Grant Date -
Mar 28, 2019
app pub date -
Mar 23, 2017
filing date -
Mar 24, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A multifunction rotary tool for milling and roughening backs of blocks of pages to be bound by a bookbinding machine comprises a cylindrical base defining a rotation axis, a first annular member adapted to be secured to the cylindrical base and having an outer edge, a crown of milling blades formed in the first annular member proximate to its outer edge and defining a cutting plane perpendicular to the rotation axis, and a plurality of roughening inserts securable to the cylindrical base along a circular area radially offset from the crown of milling blades. Each insert comprises a cylindrical body with a hook-shaped end portion defined by an upper edge with a sharp tip designed to penetrate the block back in a perpendicular cut. The end portion comprises a recessed surface adapted to tear and push downwards the cut material without removing it.
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