Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reexamination Certificate
2006-06-14
2008-08-19
Enad, Elvin (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
C335S214000, C335S220000, C335S224000, C335S251000, C335S257000, C335S259000, C335S263000, C335S264000, C335S298000
Reexamination Certificate
active
07414504
ABSTRACT:
A solenoid plunger for use in solenoid driven multi-line embossing systems is constructed of magnetic steel laminations that are attached to a center block which is machined to mount a solenoid shaft and anti-rotate pins. The laminations are attached to the center block with screws and vacuum epoxy glued for a very high cycle life. The laminated steel construction dramatically reduces eddy currents, which allows the magnetic field to rise and fall much more quickly than a conventional steel plunger. It also increases the magnetic force in the solenoid. This reduction in solenoid plunger eddy currents and increase of magnetic force in the solenoid structure itself operates to increase embosser throughput. The laminated steel construction further reduces embosser solenoid heating which also contributes to improved embossing control.
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PCT/ISA/237 for corresponding International Application No. PCT/US2007/071115.
PCT/ISA/210 for corresponding International Application No. PCT/US2007/071115.
Johnson Peter E.
Lundstrom Robert W.
DataCard Corporation
Enad Elvin
Hamre Schumann Mueller & Larson P.C.
Musleh Mohamad A
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