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US 2003/0081041 A1Published application
Image forming apparatus having position sensing device
AssigneeHewlett-Packard Development Company, L.P.
InventorsWilliam J. Allen, George C. Ross
Life of this patent
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Abstract
An image forming apparatus having a position sensing device independently sensing the position of at least two locations on a movable print device.
Claims40
An image forming apparatus, comprising:
- a movable print device;
- a sensed device having indicia that is capable of being sensed positioned adjacent to the movable print device;
- and
- at least first and second indicia sensors carried by the movable print device in spaced relation to one another.
1 more element
A scanning carriage for use in an image forming apparatus, the image forming apparatus including at least one sensed device having indicia that is capable of being sensed, the scanning carriage comprising:
- a main body configured to at least one printer element;
- and
- at least first and second indicia sensors carried by the main body in spaced relation to one another.
An image forming apparatus, comprising:
- a print device, including a carriage and a plurality of printer elements supported on the carriage, movable along a scan axis;
- at least one encoder strip positioned along at least a portion of the scan axis;
- at least first and second encoder strip sensors carried by the print device adjacent to the at least one encoder strip and in spaced relation to one another;
- and
- a controller, operably connected to the printer elements and the at least first and second encoder strip sensors, that controls the operation of a first group of printer elements at least partially in response to data from the first encoder strip sensor and controls the operation of a second group of printer elements at least partially in response to data from the second encoder strip sensor.
2 more elements
A method of operating a print device, comprising:
- moving the print device past a sensed device having indicia that is capable of being sensed;
- and
- sensing the indicia with a first indicia sensor carried by the print device and a second indicia sensor carried by the print device in spaced relation to the first indicia sensor.
An image forming apparatus, comprising:
- a movable print device;
- and
- position sensing device independently sensing a position of at least first and second predetermined locations on the movable print device.
A method of operating a print device, the method comprising:
- sensing the position of first and second spaced locations on the print device;
- controlling operation of a first portion of the print device at least partially in response to data obtained by sensing the position of the first location;
- and
- controlling operation of a second portion of the print device at least partially in response to data obtained by sensing the position of the second location.
1 more element
Dependencies are inferred from the claim text.