Alignments of media using multiple passes
AssigneeHewlett-Packard Development Company, L.P.
InventorsJason M Quintana, Jay S Gondek
Life of this patent
Estimating the term…
Abstract
An example of apparatus to align media. The apparatus includes a printer assembly to form markings a first side of a media. The apparatus also includes a sensor to detect a backside pattern on each pass at multiple locations. The apparatus includes a processor in communication with the sensor. The processor is to compare the backside pattern measured on multiple passes to determine offset amounts. The apparatus also includes a controller to adjust the media relative to the printer assembly based on the offset values.
Claims15
An apparatus comprising:
- a printer assembly to form markings on a first side of a media, wherein the printer assembly is to make a first pass and a second pass over the media;
- a first sensor to detect a backside pattern at a first location on a second side of the media and to detect the backside pattern at a second location on the second side of the media, wherein the second side of the media is opposite the first side of the media;
- a processor in communication with the first sensor, wherein the processor is to compare the backside pattern measured during the first pass and the backside pattern measured during the second pass at the first location to determine a first offset, and to compare the backside pattern measured during the first pass and the backside pattern measured during the second pass at the second location to determine a second offset;
- and
- a controller to control the printer assembly, wherein the controller is to adjust the media relative to the printer assembly based on the first offset at the first location and based on the second offset at the second location for the second pass over the media.
A method comprising:
- detecting a backside pattern at a first location;
- detecting the backside pattern at a second location, wherein the first location is at a first end of a media and the second location is at a midpoint of the media opposite the first end;
- matching the backside pattern measured during a first pass and the backside pattern measured during a second pass at the first location to determine a first offset;
- adjusting the media relative to a printer assembly by the first offset at the first location;
- matching the backside pattern measured during the first pass and the backside pattern measured during the second pass at the first location to determine a second offset;
- and
- re-adjusting the media relative to the printer assembly by the second offset at the second location.
A non-transitory machine-readable storage medium comprising instructions executable by a processor, the non-transitory machine-readable storage medium comprising:
- instructions to detect a backside pattern at a first location and at a second location during a first pass of a media;
- instructions to detect a backside pattern at the first location and at the second location during a second pass of a media;
- instructions to match the backside pattern measured during the first pass and the second pass at the first location to determine a first offset;
- instructions to adjust the media relative to a printer assembly at the first location based on the first offset;
- instructions to match the backside pattern measured during the first pass and the second pass at the second location to determine a second offset;
- and
- instructions to adjust the media relative to the printer assembly at the first location based on the first offset.
Dependencies are inferred from the claim text.