Printing – Selective or progressive – Bed and platen machines
Patent
1983-01-31
1984-07-24
Burr, Edgar S.
Printing
Selective or progressive
Bed and platen machines
101 9304, 335237, 335230, B41J 938
Patent
active
044612079
ABSTRACT:
An actuator element having a fixed end and a magnetizable deflection end is releasably held in spring loaded condition at a non-operative position by an electromagnetic operator. In the preferred form, the actuator element is an elastic beam of magnetically permeable material. The operator comprises first and second permanent magnets for generating separate magnetic fields of the same polarity proximate the magnetizable deflection end of the actuator element and a magnetic core combined with the permanent magnets to form at least first and second magnetic holding circuits with the deflection end of the actuator element through a common return path. A winding on the return path of the core when energized generates flux in opposition to the flux from the permanent magnets to release the actuator element for movement to an operative position. Upon de-energization of the winding, the deflection end of the actuator element is retracted and held by the permanent magnets in spring loaded condition.
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"Actuators for Bar and Helix Printer"; Meier, Johann; IBM Technical Disclosure Bulletin, vol. 21, No. 12, pp. 4813-4816; May 1979.
Burr Edgar S.
Gasper John S.
International Business Machines - Corporation
Wiecking David A.
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