B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
270/29
B65H 7/02 (2006.01) B43M 3/04 (2006.01) B65H 5/14 (2006.01) B65H 7/12 (2006.01) B65H 43/02 (2006.01)
Patent
CA 1238663
METHOD AND APPARATUS FOR DETECTING ARTICLE ENGAGEMENT ERRORS ABSTRACT OF THE DISCLOSURE Method and apparatus for detecting article engagement errors and for calibrating engagement error detection apparatus associated with a plurality of gripper arms (16) of an insertion machine (10). Gripper arms (16) at each of a plurality of insert stations S comprise a first jaw member (24) and a second jaw member (26). The second jaw member (26) is movable toward and away from a first jaw member (24) to selectively engage articles therebetween. Field- generating means (420) is mounted on one jaw member while a sensor (400) is connected on the other jaw member. The signal generated by the sensor (400) is indicative of the flux density of the field created by the generating means (420). The sensed flux density of the generated field as a function of the relative displacement of the first and second jaw members (24,26). The signal generated by the sensor (400) is accordingly related to the separation of the first jaw member (24) and second jaw member (26). If the sensor- generated signal is within predetermined limits of a stored reference signal a proper number of articles are engaged between the first and second jaw members (24,26). The reference signal is stored for each insert station S in accordance with a method and apparatus for calibrating an engagement error detector (364) associated with the station S. Upon verification at the start-up of the insertion machine (10) that the insert station S has a proper number of articles engaged between its first and second jaw members (24,26), a switch (467) is activated to store in a sample and hold circuit (369) the signal then generated by jaw displacement sensing means (369). The engagement error detectors for a plurality of insert stations can be calibrated one-at-a-time in serial fashion or, in an alternate mode, essentially simultaneously using a master calibration switch (MCS).
485786
Guenther Kenneth L.
Rabindran K. George
Vandersyde Gary L.
Zemke Edward H.
Bell & Howell Company
Kirby Eades Gale Baker
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