Examples of the preferred embodiments use printed content (e.g., halftones, difference in grayscale or darkness) to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor may measure halftones or grayscale differences between printed content and non-printed content of a current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate, imaging member rotation speed) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.

Examples of the preferred embodiments use printed content (e.g., halftones, difference in grayscale or darkness) to determine thickness of fountain solution applied by a fountain solution applicator on an imaging member surface and/or determine image forming device real-time image forming modifications for subsequent printings. For example, in real-time during the printing of a print job, a sensor may measure halftones or grayscale differences between printed content and non-printed content of a current printing on print substrate. Based on this measurement of printed content output from the image forming device, the image forming device may adjust image forming (e.g., fountain solution deposition flow rate, imaging member rotation speed) to reach or maintain a preferred fountain solution thickness on the imaging member surface for subsequent (e.g., next) printings of the print job.

An over-varnish unit and mandrel pre-spin system for a can decorator, especially for beverage can bodies, can have a mandrel pre-spin belt that is outside of the over-varnish unit housing. The position of the can infeed on the mandrel wheel and the print point is controlled.

An over-varnish unit and mandrel pre-spin system for a can decorator, especially for beverage can bodies, can have a mandrel pre-spin belt that is outside of the over-varnish unit housing. The position of the can infeed on the mandrel wheel and the print point is controlled.

A print registration system for a beverage can decorator includes an axial registration system and a circumferential registration system. Each registration system is independent and includes a slider that is translated by a motorized lead screw. Axial movement of the axial registration slider is transmitted to axial adjustment of the plate cylinder by a mechanical connection between the axial registration slider and the plate cylinder shaft. Translation of the circumferential registration slider is transmitted to a helical gear mounted to the plate cylinder shaft such that the plate cylinder shaft is rotated by the movement of the circumferential registration slider upon engagement of the helical driven gear with a stationary drive gear.

A print registration system for a beverage can decorator includes an axial registration system and a circumferential registration system. Each registration system is independent and includes a slider that is translated by a motorized lead screw. Axial movement of the axial registration slider is transmitted to axial adjustment of the plate cylinder by a mechanical connection between the axial registration slider and the plate cylinder shaft. Translation of the circumferential registration slider is transmitted to a helical gear mounted to the plate cylinder shaft such that the plate cylinder shaft is rotated by the movement of the circumferential registration slider upon engagement of the helical driven gear with a stationary drive gear.

An inking system for use in transferring ink to a gravure printing surface in a gravure printing system includes a gravure cylinder r having a printing zone located between first and second recessed bearing contact zones. A radius of the recessed bearing contact zones is less than a radius of the printing zone by at least 0.100 inches. An ink tray includes a floor and first and second end walls. Bearings are mounted outside of the end walls which engage with the first and second bearing contact zones, respectively, thereby positioning the ink tray assembly in a specified position relative to the gravure cylinder. Upper edges of the end walls extend into the recessed bearing contact zones.

An inking system for use in transferring ink to a gravure printing surface in a gravure printing system includes a gravure cylinder r having a printing zone located between first and second recessed bearing contact zones. A radius of the recessed bearing contact zones is less than a radius of the printing zone by at least 0.100 inches. An ink tray includes a floor and first and second end walls. Bearings are mounted outside of the end walls which engage with the first and second bearing contact zones, respectively, thereby positioning the ink tray assembly in a specified position relative to the gravure cylinder. Upper edges of the end walls extend into the recessed bearing contact zones.

An ink delivery system is provided. The ink delivery system includes at least one ink cartridge dispenser including an ink cartridge holder for holding an ink cartridge storing printing ink, at least one ink level sensor, a rotatable ink fountain roller and an ink fountain blade, forming a dispensed ink area receiving printing ink from the ink cartridge. The ink delivery system also includes a support supporting the at least one ink cartridge dispenser movably across a longitudinal axis of the ink fountain roller. The ink cartridge dispenser is movable along the support and fixable to the support manually. A method for supplying printing ink is also provided.

An ink delivery system is provided. The ink delivery system includes at least one ink cartridge dispenser including an ink cartridge holder for holding an ink cartridge storing printing ink, at least one ink level sensor, a rotatable ink fountain roller and an ink fountain blade, forming a dispensed ink area receiving printing ink from the ink cartridge. The ink delivery system also includes a support supporting the at least one ink cartridge dispenser movably across a longitudinal axis of the ink fountain roller. The ink cartridge dispenser is movable along the support and fixable to the support manually. A method for supplying printing ink is also provided.