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US 2002/0176728 A1Published application
Method of controlling impact printer noise
AssigneeAxiohm Transaction Solutions, Inc.
InventorsJames Del Signore, Steven Spano
Life of this patent
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Abstract
A method of controlling noise in an impact printer that modulates the input pulse to the power amplifier of the printer. The resulting current waveform is then applied to the print wire solenoids. The final shape of the force input to the platen reduces or spreads the spectral envelope containing problem harmonics and acoustic output noise.
Claims6
A method of controlling noise in an impact printer, comprising the steps of:
- a) modifying input pulses of voltage applied to a power amplifier of the impact printer;
- and
- b) applying a resulting waveform to print wire solenoids in order to control noise.
A system for controlling noise in an impact printer, comprising:
- a power amplifier for supplying power to said impact printer;
- means for modifying input pulses of voltage applied to said power amplifier of the impact printer to provide a modified waveform for print wire solenoids;
- and
- means for applying said modified waveform to said print wire solenoids.
1 more element
Dependencies are inferred from the claim text.