Abstract: An electrophotographic imaging system including a combination erase and belt position detection system which may be employed for belt registration or image registration. In one embodiment, the system includes an erase bar having a pattern of light extending longitudinally across a photoconductor belt being moved in a first direction forming a transport path, wherein the erase bar is substantially perpendicular to the first direction. A photodetector is disposed adjacent the photoconductor belt, wherein the photodetector is responsive to light from the erase bar and provides a belt position signal representative of the position of the photoconductor belt relative to the continuous transport path, in a direction substantially perpendicular to the first direction. The belt position signal may be employed for belt steering or modulation of a laser beam representative of latent images to be scanned on the photoconductor belt.

Abstract: A system for belt registration for use in an electrophotographic imaging system, which operates to detect a position of the photoconductor belt uses a pulsed light photodetection system disposed adjacent an edge of the photoconductor belt. The photodetection system may be synchronous or asynchronous. The registration system includes a belt steering system that steers the photoconductor belt based on the detected position to reduce deviation of the belt from a transport path. The registration system may also include a scan control system such that, based on the detected position, controls the modulation of laser beams scanned to form latent images on the photoconductor belt.

Abstract: A system for registration of color separation images on a photoconductor belt in an imaging system operates to detect a position of the photoconductor belt using an opening which may be scribed through the belt opaque layer. The registration system detects the position with the same laser scanner used for forming latent images on the photoconductor belt. The registration system includes a belt steering control system that steers the photoconductor belt based on the detected position to reduce deviation of the belt from a continuous transport path. The registration system also may include a scan control system that, based on the detected position, controls the modulation of laser beams scanned to form latent images on the photoconductor belt. By controlling belt steering and laser beam scanning, the registration system maintains the image quality of a final multi-color image upon transfer of registered color separation images to an output substrate.

Abstract: A system for registration of a photoconductor belt in a multi-color electrophotographic imaging system, which operates to detect a position of the photoconductor belt uses a photodetection system disposed adjacent a plurality of scribed lines in the photoconductor belt. The registration system also includes a belt steering system that steers the photoconductor belt based on the detected position to reduce deviation of the belt from a transport path.