APPARATUS FOR AND METHOD OF TRIMMING OF PERFECT BOUND BOOKS
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United States of America Patent
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Issued Date -
May 12, 2011
app pub date -
Nov 11, 2010
filing date -
Nov 11, 2009
priority date (Note) -
Abandoned
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Abstract
Apparatus for and a method of determining and correcting the position and angularity of an edge of a book to be trimmed relative to a shearing plane is disclosed. The book is movable toward and away from the shearing plane and is rotatable about a rotary axis. A pair of spaced sensors generate an output signal indicative of the edge being proximate each the sensor so that upon each sensor generating its signal at substantially the same time thus indicating that the edge is substantially parallel to the shearing plane and so that if one sensors senses the edge before the other thus indicating that the edge is oriented at an angle relative to the shearing plane. A computer control system corrects the angle and vertically positions the edge so that a predetermined trim line for that edge is substantially in register with the shearing plane.
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