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US 4,537,850 AGranted
Process and apparatus for rejuvenating electrostatic copy machine toner
OwnerWilfred Smeimaninventor
Life of this patent
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Abstract
A method and apparatus for rejuvenating magnetic toner used in certain electrostatic copying machines. The used toner is placed in a container which is inserted in an air coil which is energized to produce a magnetic field which remagnetizes the toner. The coil is provided by mounting a hollow non-magnetic tube in a case and winding this tube with wire. A timing circuit energized by a momentary switch determines the length of time a magnetic field is applied to the toner being recycled.
Claims12
A process for rejuvenating toner for electrostatic copy machines comprising:
- transferring a used toner having magnetic particles coated with a fusible component to a container;
- surrounding said container with an electromagnetic coil;
- energizing said electromagnetic coil to apply a pulsed magnetic field to said toner;
- timing the output of said electromagnetic coil to optimize the application of said pulsed electromagnetic field for optimum magnetic strength of said toner.
1 more element
Apparatus for rejuvenating toner for electrostatic copy machines comprising:
- a hollow core means;
- an electromagnetic coil surrounding said hollow core means;
- container means containing used toner having magnetic particles coated with a fusible component for placing the toner to be rejuvenated inside said core;
- energizing means for energizing said electromagnetic coil to produce a pulsed electromagnetic field to said toner;
- timing means for timing the operation of said energizing means to optimize the application of said electromagnetic field for optimum magnetic strength of said toner.
2 more elements
Dependencies are inferred from the claim text.