Using conductive nipped rollers to measure media length

An imaging apparatus, comprising:

• a controller;
• a first imaging engine coupled in control signal communication with the controller and configured to selectively form images on a sheet media;
• a second imaging engine coupled in control signal communication with the controller and configured to selectively form images on a sheet media;
• a nip assembly including an at least partially electrically conductive roller and an electrically conductive wheel, the nip assembly configured to pass a sheet media from the first imaging engine to the second imaging engine;
• and
• a circuit electrically coupled to the nip assembly and coupled in signal communication with the controller, the circuit configured to provide a length signal to the controller corresponding to a length of a sheet media passed through the nip assembly, and wherein the controller is configured to selectively control a normal operation of the second imaging engine in correspondence to the length signal.

An imaging apparatus, comprising:

• a controller;
• an imaging engine coupled in control signal communication with the controller and configured to selectively form images on a sheet media;
• a nip assembly including an at least partially electrically conductive roller and an electrically conductive wheel, the nip assembly configured to pass a sheet media to the imaging engine;
• and
• a circuit electrically coupled to the nip assembly and coupled in signal communication with the controller, the circuit configured to provide a length signal to the controller corresponding to a length of a sheet media passed through the nip assembly, and wherein the controller is configured to selectively control a normal operation of the imaging engine in correspondence to the length signal.

An imaging apparatus, comprising:

• control means;
• first and second imaging means respectively coupled to the control means;
• and
• length sensing means coupled to the control means and disposed in sheet media passing relationship between the first and second imaging means, the length sensing means configured to provide a signal to the control means in response to a length of sheet media passed through the length sensing means.

A method of controlling an imaging apparatus, comprising:

• selectively imaging a first side of a sheet media;
• passing the imaged sheet media through a nip assembly;
• detecting a change in electrical potential in correspondence to the passing;
• determining a length of the sheet media in response to the detecting;
• providing a length signal in response to the determining;
• and
• selectively imaging a second side of the sheet media in correspondence to the length signal.

A sense circuit for use with an imaging apparatus, comprising:

• a processor;
• an oscillator coupled in signal communication with the processor and configured to generate a stream of substantially regular clock pulses;
• a computer-readable storage media coupled in data communication with the processor and storing a program code, the program code configured to cause the processor to:
• monitor an electrical potential signal;
• count a plurality of the clock pulses generated by the oscillator during a predefined shift in the electrical potential signal;
• and
• provide a length signal on a signal line of the processor in correspondence to the counted plurality of clock pulses.