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Electromagnetic Document Brake

IP.com Disclosure Number: IPCOM000065637D
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Noll, MR Rascoe, FH [+details]

Abstract

Documents moving along document path A normally pass by leaf spring brake B by flexing the leaf spring as the documents pass. When it is desired to arrest a document, electromagnet C is activated, attracting magnetic material D attached to the end of the leaf spring brake. By maintaining electromagnet C in a state of weak energization, movement of magnetic material D by the passage of documents can be detected by change in the current flowing through magnet C.