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US 6,204,457 B1Granted
Electromagnetic inking digitizer pen and method
AssigneeFine Point Innovations, Inc.
InventorsAlexander B. Shekhel, Stephen R. Caldwell
Life of this patent
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AssigneeFine Point Innovations, Inc.
InventorsAlexander B. Shekhel, Stephen R. Caldwell
Estimating the term…
A digitizer pen includes a barrel section, a nose section removably attached to the barrel section, and an ink cartridge disposed in the barrel section and having a writing tip protruding from an end of the nose section, a cylindrical ferrite core disposed in the nose section, a first portion of the ferrite core being rigidly attached to the nose section. A coil surrounding a second portion of the ferrite core is attached to the barrel section. A writing tip end of the ink cartridge extends through the ferrite core. The first portion of the ferrite core is separable from the coil, so that when the nose section is removed from the barrel section the first portion of the ferrite core is separated from the coil, leaving the coil attached in fixed relation to the barrel section and also leaving exposed a portion of the ink cartridge initially covered by the first portion of the ferrite core, whereby a user can easily grasp the exposed portion of the ink cartridge and remove it without the aid of a tool.
In a digitizer pen including a barrel section, a nose section adjacent to the barrel section, and an ink cartridge disposed in the barrel section and having a writing tip protruding from an end of the nose section, an improvement for solving the problem of difficulty in removing an ink cartridge from a digitizer pen of the type in which only a small writing tip portion of the ink cartridge extends from the nose section and in which high signal strength is achieved with low power dissipation by providing in the nose section a ferrite core having therein a hole through which the ink cartridge extends and providing a pen coil wound around the ferrite core, the improvement comprising:
In a digitizer pen including a barrel section, a nose section removably attached to the barrel section, and an ink cartridge disposed in the barrel section and having a writing tip protruding from an end of the nose section, an improvement for solving the problem of difficulty in removing an ink cartridge from a digitizer pen of the type in which only a small writing tip portion of the ink cartridge extends from the nose section and in which high signal strength is achieved with low power dissipation by providing in the nose section a ferrite core having therein a hole through which the ink cartridge extends and providing a pen coil wound around the ferrite core, the improvement comprising:
A cordless digitizer pen, comprising in combination:
A cordless digitizer pen comprising in combination:
A method for solving the problem of difficulty in removing an ink cartridge from a digitizer pen of the type in which only a small writing tip portion of the ink cartridge extends from the nose section and in which high signal strength is achieved with low power dissipation by providing in the nose section a ferrite core having therein a hole through which the ink cartridge extends and providing a pen coil wound around the ferrite core, the method comprising the steps of:
Dependencies are inferred from the claim text.