Resources Contact Us Home
Belt position sensing for image registration

Image Number 5 for United States Patent #5208633.

In an imaging device having a belt supporting image on an image supporting surface and moving along an endless path in a process direction, an exposure device for forming images on the image supporting surface, an arrangement is provided to derive information about belt position with respect to the exposure device. The belt is provided with at least one fiducial opening or target at a belt edge, and a sensor is arranged with respect to the belt and the fiducial opening, to sense illumination directed through the fiducial opening. An illumination source is provided at a fixed position with respect to the exposure device and the sensor to directing illumination to the sensor, when the fiducial opening is aligned with the sensor, including at least two independently detectable illumination sources arranged along a cross process direction. Belt position with respect to the exposure device is then determined from the amount of occlusion of one of the first and second independently detectable illumination sources. Control of belt position may be split between image processing methods and mechanical methods.

  Recently Added Patents
Backup and recovery of distributed storage areas
High-voltage AC light-emitting diode structure
Display for displaying three-dimensional images and method for displaying three-dimensional images
Apparatus and method for performing lawful intercept in group calls
Techniques for accessing a parallel database system via external programs using vertical and/or horizontal partitioning
Multifunction switch for vehicle having lighting module
Method and apparatus for controlling peak amplifier and doherty power amplifier
  Randomly Featured Patents
Wide-range variable delay and ring oscillator
Programming a non-volatile memory device
Electroconductive laminate, and electromagnetic wave shielding film and protective plate for plasma display
Electric lamp with a coating containing a metal oxide pigment for displaying formation
Process for separating 2-butanol from tert-butanol/water mixtures
Valve assembly for panel mounting
External speech processor unit for an auditory prosthesis
Insulated electrical shock tube
Supporting structure and a support carrier
Methods, apparatuses, and systems for the dynamic evaluation and delegation of network access control