Browse Prior Art Database

Staple Detector and Protection System

IP.com Disclosure Number: IPCOM000095953D
Original Publication Date: 1964-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Bond, MF: AUTHOR [+2]

Abstract

Staples, paper clips and other like objects attached to documents can damage document sensing devices 17 and 18 and protective tape 19 and cause jams in the document transport apparatus.

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Staple Detector and Protection System

Staples, paper clips and other like objects attached to documents can damage document sensing devices 17 and 18 and protective tape 19 and cause jams in the document transport apparatus.

Write head 10 magnetizes by ferrous material in the document. Where the characters are printed in magnetic ink, read head 11 detects the signals generated by the characters and by the magnetized foreign ferrous material. The signals are amplified by amplifier 12. Threshold circuit 13 removes low-level noise and signals resulting from the magnetic characters and passes the higher amplitude signals generated by the magnetized ferrous foreign material. The output signal from 13 is amplified by amplifier 14 and passed to energize solenoids 15 and 16 for rocking associated read and write heads 17 and 18 out of close proximity to the document path. This enables documents with foreign particles, such as staples, to pass without damage to the protective tape 19 or data read and write heads 17 and 18.

The signal passed by 13 can also be used for energizing apparatus 20 for deflecting the document containing the foreign ferrous material into a special reject receptacle. This receptacle is positioned to enable the document to be diverted to it just after the document is scanned for any foreign ferrous particles.

For document reading systems, such as optical reading systems where no magnetic characters are involved, it is not necessary to magnetize the f...