Adaptive electronic registration system
AssigneeXerox Corporation
InventorWilliam D. Milillo
Life of this patent
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Abstract
A method and apparatus for positioning paper in a feed path by providing continuous feedback of copy sheet registration parameters is disclosed. More specifically, the present invention is directed to a system which compares measured sheet registration information with an ideal value stored in a microprocessor. These measured registration parameters are averaged and pertinent information is fed back to the control system of the copy sheet registration device. The information that has been fed back is then used to adjust the orientation of subsequent copy sheets, thereby allowing for ideal placement of the copy sheet onto the photoreceptor for successful transfer of a developed image.
Claims17
A method of continuously positioning copy media in a feed path, comprising the steps of:
- a) feeding the copy media into the feed path;
- b) using an ideal motion control parameter derived from a desired photoreceptor displacement to correct an orientation of the copy media for placement on a target in a pre-determined configuration;
- c) collecting data, in terms of a longitudinal component and a skew component, which describes a correction required to place the copy media in said pre-determined configuration;
- d) transmitting said data to a central processing controller, and storing it in locations in a computer memory;
- e) separately calculating average values for longitudinal and skew correction data from values stored in a plurality of computer memory locations;
- f) continuously updating said motion control parameter with said longitudinal and skew correction averages;
- and
- g) positioning subsequent copy media using said altered motion control parameter.
An apparatus for continuously positioning copy media in a feed path, comprising:
- a) a paper tray for storing the copy media, and for advancing the copy media to the feed path;
- b) an electronic drive roll system defining a nip, said electronic drive roll system located at an end of the feed path to orient sheets for proper placement onto a target;
- c) a correcting device communicating with said electronic drive roll system and with a photoreceptor displacement measuring device to adjust an orientation of the copy media based upon a desired photoreceptor displacement, if said copy media has become mis-aligned;
- d) a measuring device to determine a profile which includes a motion that has been required to eliminate misalignment of at least a first copy media;
- e) a feedback system communicating with said electronic drive roll system and with said correcting device to alter, based upon said profile, an orientation of subsequent copy media as it enters said nip, thereby reducing an amount of misalignment present when said subsequent copy media exits said nip;
- and
- f) a media transport system to move the copy media from said paper tray, along the feed path, to said electronic drive roll system, and to advance the copy media through said nip.
An apparatus for continuously positioning copy media in a feed path, comprising:
- a) means for feeding the copy media into the feed path;
- b) means for correcting an orientation of the copy media for placement on a target in a pre-determined configuration;
- c) means for collecting data, in terms of a longitudinal component and a skew component, which describes a correction required to place the copy media in said pre-determined configuration;
- d) means for transmitting said data to a processing controller, and storing it in a computer memory;
- e) means for separately calculating average values for longitudinal and skew correction data from values stored in computer memory;
- f) means for continuously updating said correcting means with said longitudinal and skew correction averages;
- and
- g) means for positioning subsequent copy media using said altered correction means.
Dependencies are inferred from the claim text.