In one example, an inkjet web printer includes a print engine and a controller programmed to determine that a second print job following a first print job may be printed without stopping the web and, without stopping the web, cause the print engine to print the second print job.

In one example, an inkjet web printer includes a print engine and a controller programmed to determine that a second print job following a first print job may be printed without stopping the web and, without stopping the web, cause the print engine to print the second print job.

An example service station system may include a guide bar to provide tension on web material. An example print apparatus may include a sensor mounted to a carriage and a controller to use data from the sensor to identify that the web material is incorrectly routed with reference to the guide bar.

An example service station system may include a guide bar to provide tension on web material. An example print apparatus may include a sensor mounted to a carriage and a controller to use data from the sensor to identify that the web material is incorrectly routed with reference to the guide bar.

An example service station system may include a guide bar to provide tension on web material. An example print apparatus may include a sensor mounted to a carriage and a controller to use data from the sensor to identify that the web material is incorrectly routed with reference to the guide bar.

Examples disclosed herein relate to an imaging device. Examples include a method for increasing the temperature of the imaging device by determining an internal temperature of the imaging device; determining if a start-up routine is to be initiated; pausing the start-up routine if the internal temperature is below a threshold temperature; and energizing at least one of a fan or heating element of the imaging device when the internal temperature is below the threshold temperature.

A fluid dispensing method, the method comprising steps of: providing a system comprising a reservoir, a micro-fluidic thermal inkjet print head in fluid communication with the reservoir, a controller and a power source in electrical communication with the controller and the print head, the reservoir containing a fluid, the micro-fluidic thermal inkjet print head comprising nozzles; heating the fluid in the microfluidic device to a temperature of about 40 C to 75 C in less than about 1000 ms; activating the print head to fire the nozzles about 200 fires/nozzle at a first frequency; subsequent to step c, activating the print head to fire the nozzles at a second frequency, the second frequency substantially less than the first frequency; and subsequent to step d, activating the print head to fire the nozzles at a third frequency substantially greater than the first frequency.

A fluid dispensing method, the method comprising steps of: providing a system comprising a reservoir, a micro-fluidic thermal inkjet print head in fluid communication with the reservoir, a controller and a power source in electrical communication with the controller and the print head, the reservoir containing a fluid, the micro-fluidic thermal inkjet print head comprising nozzles; heating the fluid in the microfluidic device to a temperature of about 40 C to 75 C in less than about 1000 ms; activating the print head to fire the nozzles about 200 fires/nozzle at a first frequency; subsequent to step c, activating the print head to fire the nozzles at a second frequency, the second frequency substantially less than the first frequency; and subsequent to step d, activating the print head to fire the nozzles at a third frequency substantially greater than the first frequency.

A thermal printer includes a thermal head, a temperature sensor, and a controller. The thermal head includes heat generation elements configured to generate heat to perform printing. The temperature sensor is disposed in the thermal printer. The controller is configured to alternately turns on and off the heat generation elements during an idle state of the thermal printer for a number of cycles with a predetermined on-time period in each cycle. The controller determines the number of cycles and the predetermined on-time period based on temperature data obtained by the temperature sensor, such that heat energy generated by the heat generation elements during each of the cycles in the idle state is lower than heat energy generated by the heat generation elements during printing of one line.

A thermal printer includes a thermal head, a temperature sensor, and a controller. The thermal head includes heat generation elements configured to generate heat to perform printing. The temperature sensor is disposed in the thermal printer. The controller is configured to alternately turns on and off the heat generation elements during an idle state of the thermal printer for a number of cycles with a predetermined on-time period in each cycle. The controller determines the number of cycles and the predetermined on-time period based on temperature data obtained by the temperature sensor, such that heat energy generated by the heat generation elements during each of the cycles in the idle state is lower than heat energy generated by the heat generation elements during printing of one line.