Cartridge for electronic devices including grounding pads and conductive shielding to decrease the wavelength of emitted electromagnetic radiation

Abstract

An add-in or expansion cartridge is provided for insertion into a cartridge receptacle of an electronic device, such as a laser printer, the electronic device comprising a first plurality of circuit elements. The add-in cartridge comprises a circuit board having a second plurality of circuit elements mounted thereon, the circuit board comprising a plurality of grounding pads and connectors for electrically connecting the second plurality of circuit elements, which may include a processor, to the electronic device. A housing accommodates the circuit board and comprises an opening such that the connector extends through the opening for connecting the circuit board through the electronic device. A conductive shielding layer is arranged on at least one interior surface of the housing and substantially surrounds the circuit board to reduce emission of electromagnetic radiation. First and second grounding pads are arranged at first and seconds ends, respectively of the opening. A third grounding pad is arranged between the first and second grounding pads and within the opening to decrease the wavelength of emitted electromagnetic radiation. The conductive shielding layer is in electrical connection with each of the plurality of grounding pads.

Dependencies are inferred from the claim text.