Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Purdue Research Foundation

Mark John Wibbels

Kenneth Eugene Heath

B Mark Hirst

Victor D Loewen

Kenneth Kay Smith

Perry Victor Lea

Dean J Richtsmeier

Bartley Mark Hirst

Brian Christopher Mayer

Doug Batten

Jan Philip Allebach

Mark Edward Shaw

Jeffrey H Luke

David J Arcaro

Wayne E Foote

Steve A Jacob

Gerard Joseph Carlson

Roger Scott Twede

Yung-hsiang Lu

Gar P Kelly

Laurian Dinca

Hernan Ildefonso Gutierrez-Vazquez

Stephen H Schwartz

Richard L Swantner

Wenyi Chen

Jon T Huber

Ganesh Prahlad Rao Gingade

Stephen H Schwarz

In one example, a printer with adaptive sampling includes a print engine, a monochrome scanner, a light source, and an analysis module. The light source has independently controlled primaries oriented to illuminate a media from the print engine. The analysis module includes a page selection module to select a chosen page of media for analysis, a heuristic analysis module to analyze the chosen page and determine a region of the page for analysis, a light control module to select a mono-color for the light source in region on the chosen page, and a quality module to accept an image of the chosen page and a scan of the chosen page with the monochrome scanner illuminated by the selected mono-color and compare the image and the scan within the region to determine a discrepancy.

Adaptive sampling

According to examples, an apparatus may include a processor and a memory on which are stored machine-readable instructions that when executed by the processor, may cause the processor to print a first indicia at a first region on a first side of a print medium. The instructions may also cause the processor to print a second indicia at a second region on the first side of the print medium, in which the second region may be spaced a prescribed distance from the first region along a first edge of the print medium. In some examples, a relative position of the first indicia to the second indicia may correlate to a skew correction value for the first edge of the print medium.

Print indicia for skew correction

According to examples, an apparatus may include a fusing component and a heater disposed in the fusing component. The heater may include a substrate having a first surface and a second surface, a first heating element having a first length attached to the first surface of the substrate, and a second heating element having a second length attached to the second surface of the substrate, the second length differing from the first length.

Fusing components including heating elements of differing lengths

Examples disclosed herein relate to unlocking consumables of imaging devices. Example imaging devices include a lock to secure a consumable to the imaging device. A feedback engine of the imaging device may selectively generate a signal in response to an actuation event to control a component to indicate the consumable is secured. A lock control engine of the imaging device may determine if the actuation event is approved to unlock the consumable. A release engine of the imaging device may disengage the lock in response to approval of the actuation event.

Unlocking consumables

An example system includes a client interface to receive a print job from a client device, wherein the print job includes a user identifier (UID) and a current user location. The example system further includes a controller having an adaptive caching portion to determine that the current user location is a new user location for the UID, identify at least one printer identifier (PID) associated with the new user location, and associate the UID with the new user location and the at least one PID. The system further includes a printer interface to adaptively cache the print job in its entirety at least at one printer corresponding to the at least one PID.

Print caching

According to an example, a printer may receive an instruction to print a print job of a user and determine parameters of the print job. The printer may perform heuristic analysis of the print job based on the parameters of the print job and previously collected printing heuristic statistics of the user and adjust user printer configurations based on the heuristic analysis.

Heuristic-based acoustic emission and energy conservation

In one example in accordance with the present disclosure a method of is described. According to the method, usage data for an electronic device is obtained. An activity phase from a plurality of activity phases for the electronic device is selected based on the usage data. An activity phase has a corresponding timeout period and is defined by an inter-arrival threshold. The electronic device is instructed to enter a low power mode after being inactive for a time period at least as great as the timeout period corresponding to a selected activity phase.

Power management for electronic devices

An apparatus operates to provide default services or functionality. The apparatus authenticates replaceable resources by determining whether the replaceable resources originate from a desired source. The apparatus provides an auxiliary service or functionality in addition to the default services or functionality when each of the replaceable resources originates from the desired source, and precludes the auxiliary service or functionality when any of the replaceable resources do not originate from the desired source.

Providing auxiliary services or functionality on an apparatus

Embodiments of the present invention include devices, media, systems, and methods of image adjustment. One exemplary embodiment includes a printing device having a program and a print engine. The program can apply a filter profile associated with an image filtering material. The program can adjust an image based upon the filter profile. The print engine can be in communication with the program to print an image, adjusted based on the filter profile, on a print media.

Image adjustment

A method for refining a length of a scan line, where the scan line is produced from a facet of a scanning device. The method includes the steps of: (a) acquiring a plurality of scan line lengths produced from the facet, (b) determining from the plurality of scan line lengths, an average scan line length for the facet, and (c) determining from the average scan line length, a scan line length correction for the facet. A method for measuring a length of a scan line includes the steps of: (a) charging an electrical current integrator to a voltage while a scan line is produced from a facet, (b) measuring the voltage, and (c) determining from the voltage, the length of the scan line produced from the facet.

Characterization of a scan line produced from a facet of a scanning device

There is provided a fusing system. The fusing system includes a fuser roller, a pressure roller arranged parallel to the fuser roller for providing pressure to a medium passing between the fuser roller and the pressure roller, and a heater external to the fuser roller and applying heat to the fuser roller when the heater is operated to apply heat. The fusing system also includes a control mechanism that the controls the heater to reduce heat provided by the heater when the temperature of the heater is determined to be above a predetermined maximum heater temperature.

Power control system for fusing system with external heater

The present disclosure relates to a fusing system for fusing toner to a recording medium. The system includes a fuser roller, a pressure roller in contact with the fuser roller, and an external heating roller. In addition, the disclosure relates to a method for heating a fuser roller of a fusing system. The method includes the steps of providing an external heating roller, contacting an outer surface of the fuser roller with the external heating roller, heating the external heating roller, and rotating the external heating roller and the fuser roller such that heat is transferred from the external heating roller to the fuser roller.

Fusing system including an external heater

A method of aligning and registering duplex images using an imaging device, such as a printer including the steps of applying a first image to a first side of a media, modifying one or more imaging parameters of the imaging device after the first image is applied, and applying a second image to a second side of the media using the modified imaging parameters.

Duplex image registration

A method of aligning and registering duplex images in the process direction using an imaging device, such as a printer including the steps of applying a first image to a first side of a media, modifying one or more imaging parameters of the imaging device after the first image is applied, and applying a second image to a second side of the media using the modified imaging parameters.

The present disclosure relates to a fusing system for fusing toner to a recording medium. The fusing system includes a fuser roller including a metal layer, a pressure roller in contact with the fuser roller, and an external induction heating element. In addition, the disclosure relates to a method for heating a fuser roller of a fusing system including the steps of positioning an external induction heating element in close proximity to the outer surface of the fuser roller, delivering high frequency current to a coil of the external induction heating element to create a magnetic flux, and directing the magnetic flux toward the fuser roller so as to induce eddy currents within a metal layer of the fuser roller that generate heat within the roller.

Growing community of inventors

Boise, ID, United States of America

Mark John Wibbels