Patent ID: 6185832
Filing Date: 2001-02-13
Classification: B65H,G01B

Abstract:
A method of calipering a book of signatures to determine the number of pages in the book by measuring the thickness of the book, comprising the steps of:placing the book between a pair of mutually opposed caliper elements;urging one of said caliper elements to move toward the other such element so as to compress the book between the caliper elements whereby the moveable caliper element initially reaches maximum compression of the book between the caliper elements as determined by the thickness of the book, and then rebounds from that maximum compression in response to resilience of the book;using a measuring element to detect the maximum movement of the one caliper element toward the other of said caliper elements before the rebound, said measuring element being nonresponsive to the rebound; andusing that maximum movement to produce a signal indicative of the thickness of the book.