摘要:
A power monitoring system uses a low loss reflective element to partially split the output laser beams from an array of laser sources, in a parallel configuration, to produce a monitor beams for each laser source. Each of these monitor beams may propagate within the reflective element in a lossless manner under total internal reflection and into one of a plurality of photodiodes that sense an optical characteristic such as output beam intensity, where this sensed signal is then used as part of a feedback control to control operation of the laser sources in the array.
摘要:
A method for detecting a defect in an inkjet print head for printing a substantially clear ink includes including an ultraviolet or infrared sensitive material in the substantially clear ink, marking a test image on a substrate by jetting the substantially clear ink through one or more jets of the inkjet print head to be evaluated, exposing the test image to activating radiation having a wavelength to which the included ultraviolet or infrared sensitive material responds. During or following the exposing, the test image is evaluated with an image sensor, and whether the inkjet print head or any one of the one or more jets thereof being evaluated is defective is then determined based on the evaluation. A system for the method is also set forth.
摘要:
An approach is provided for controlling ultraviolet-curable gel ink spread of a printed image. The approach involves causing, at least in part, one or more inks to be applied to a first substrate image area by one or more inkjets in a printing zone of a printer, the one or more inkjets being configured to form one or more first ink spots on the first substrate image area. The approach also involves determining a temperature of at least the first substrate image area in the printing zone. The approach further involves determining a first spot size of at least one of the one or more first ink spots. The approach additionally involves causing, at least in part, a temperature of at least a second substrate image area in the printing zone to be based, at least in part, on the determined first spot size.
摘要:
A scratch-off document may include a substrate bearing a toner image and a scratch-off layer covering the printed content. The scratch-off layer may include a mass of a first solid ink and a mass of a second solid ink printed over the first solid ink in a distraction pattern. The toner image is formed of a toner that adheres to the substrate, while the scratch-off layer is made of a wax-based or other solid ink that may be removed from the substrate by scratching without removing the toner image. The distraction pattern includes varying pile heights that distract a viewer from any pile height variations that may exist in the toner image.
摘要:
An approach is provided for controlling ultraviolet-curable gel ink spread of a printed image. The approach involves causing, at least in part, one or more inks to be applied to a first substrate image area by one or more inkjets in a printing zone of a printer, the one or more inkjets being configured to form one or more first ink spots on the first substrate image area. The approach also involves determining a temperature of at least the first substrate image area in the printing zone. The approach further involves determining a first spot size of at least one of the one or more first ink spots. The approach additionally involves causing, at least in part, a temperature of at least a second substrate image area in the printing zone to be based, at least in part, on the determined first spot size.
摘要:
A method and apparatus for metering release agent on an imaging member includes applying a release agent to a rotating imaging member at an application location and then controlling a thickness of the release agent on the imaging member with a rotating metering roll. In at least one embodiment, the method for metering a release agent includes rotating the metering roll as a counter-roll to an imaging drum such that the metering roll moves in an opposite direction from the imaging drum at a nip between the metering roll and the imaging drum. The metering roll may include an elastomer provided over the substantial portion of its outer surface which contacts the imaging drum. The metering roll may also be forcibly biased against the imaging drum. At least one wiper blade may be provided in contact with the metering roll to wipe excess release agent from the metering roll.
摘要:
A scratch-off document may include a substrate bearing a toner image and a scratch-off layer covering the printed content. The scratch-off layer may include a mass of a first solid ink and a mass of a second solid ink printed over the first solid ink in a distraction pattern. The toner image is formed of a toner that adheres to the substrate, while the scratch-off layer is made of a wax-based or other solid ink that may be removed from the substrate by scratching without removing the toner image. The distraction pattern includes varying pile heights that distract a viewer from any pile height variations that may exist in the toner image.
摘要:
A method and apparatus for metering release agent on an imaging member comprises applying a release agent to a rotating imaging member at an application location and then controlling a thickness of the release agent on the imaging member with a rotating metering roll. In at least one embodiment, the method for metering a release agent comprises rotating the metering roll as a counter-roll to an imaging drum such that the metering roll moves in an opposite direction from the imaging drum at a nip between the metering roll and the imaging drum. The metering roll may include an elastomer provided over the substantial portion of its outer surface which contacts the imaging drum. The metering roll may also be forcibly biased against the imaging drum. At least one wiper blade may be provided in contact with the metering roll to wipe excess release agent from the metering roll.
摘要:
A method for detecting a defect in an inkjet print head for printing a substantially clear ink includes including an ultraviolet or infrared sensitive material in the substantially clear ink, marking a test image on a substrate by jetting the substantially clear ink through one or more jets of the inkjet print head to be evaluated, exposing the test image to activating radiation having a wavelength to which the included ultraviolet or infrared sensitive material responds. During or following the exposing, the test image is evaluated with an image sensor, and whether the inkjet print head or any one of the one or more jets thereof being evaluated is defective is then determined based on the evaluation. A system for the method is also set forth.