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US 9,315,350 B2Granted
Initiating alignment correction of printed media sheets
AssigneeHewlett-Packard Indigo B.V.
InventorsLior Joseph, Avihay Menashe, Itzik Kent
Life of this patent
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Abstract
Sheet length data is received for printed media sheets passed through a printing device. A length difference between the printed media sheets is calculated, and in response to the length difference exceeding a specified threshold, an alignment correction in a finishing device is initiated to align the printed media sheets.
Claims15
A method comprising:
- receiving, by a controller, sheet length data for printed media sheets of a same standard dimension passed through a printing device;
- calculating, by the controller, a length difference between at least two of the printed media sheets;
- and
- in response to the length difference exceeding a specified threshold, initiating, by the controller, alignment correction in a finishing device to align the printed media sheets, wherein initiating the alignment correction in the finishing device comprises executing the alignment correction on one of the at least two printed media sheets that passed consecutively through the printing device.
1 more element
A method comprising:
- receiving, by a controller, sheet length data for printed media sheets of a same standard dimension passed through a printing device;
- calculating, by the controller, a length difference between at least two of the printed media sheets;
- in response to the length difference exceeding a specified threshold, initiating, by the controller, alignment correction in a finishing device to align the printed media sheets;
- measuring lengths of the printed media sheets with at least one camera in the printing device as each printed media sheet passes through the printing device;
- and
- providing the measured lengths as the sheet length data.
3 more elements
A method comprising:
- receiving, by a controller, sheet length data for printed media sheets of a same standard dimension passed through a printing device;
- calculating, by the controller, a length difference between at least two of the printed media sheets;
- and
- in response to the length difference exceeding a specified threshold, initiating, by the controller, alignment correction in a finishing device to align the printed media sheets, wherein initiating the alignment correction in the finishing device comprises initiating the alignment correction in the finishing device that is physically coupled to the printing device.
1 more element
A printing system comprising:
- a finishing mechanism comprising an alignment mechanism;
- and
- a controller to:
- receive measured sheet lengths for respective printed media sheets passed through a printing device;
- compare the measured sheet lengths for a first printed media sheet and a second printed media sheet of the printed media sheets;
- and
- in response to a difference in the measured sheet lengths for the first and second printed media sheets exceeding a specified threshold, initiate alignment correction to align the first and second printed media sheets using the alignment mechanism.
4 more elements
A non-transitory processor-readable storage medium storing instructions that upon execution cause a printing system to:
- receive sheet lengths of respective printed media sheets printed by a printing device, wherein the sheet lengths are received from the printing device;
- increment a sheet count for each sheet length received;
- calculate a length difference between at least two of the sheet lengths;
- initiate alignment correction in a finishing device to align printed media sheets corresponding to the at least two sheet lengths in response to the length difference exceeding a specified threshold;
- and
- in response to the length difference not exceeding the specified threshold:
- determine whether the sheet count exceeds a sheet count threshold,
- in response to the sheet count exceeding the sheet count threshold, calculate an average sheet length of printed media sheets in at least a subset of the printed media sheets printed by the printing device, and
- initiate alignment correction in the finishing device in response to the average sheet length exceeding a trend threshold.
6 more elements
Dependencies are inferred from the claim text.