Abstract: An apparatus (200) and method for preparing a cylindrical object having a protective surface coating, such as a necked can (100), for decorating thereon using a printing technique. According to the method, a primer is applied onto the surface coating, and the primer is then dried to form a surface for decorating the object. The apparatus comprises a priming station (260) for applying a primer onto said surface coating, and a drying station (270) for drying the primer.

Abstract: The present disclosure provides an apparatus for handling objects. The apparatus comprises a carrying device (104) that is configured to move along a track (102). A handling device (224) is adapted to hold an object (108) and is mounted to the carrying device (104) such that it is rotatable with respect to the carrying device about a handling axis (226). A drive device (310) is disposed at a position along the track (102) and configured to produce a torque around a drive axis. The carrying device (104) can be moved along the track (102) in a direction perpendicular to the drive axis into and out of a drive position. In the drive position, the handling axis (226) of the handling device (224) is in substantial alignment with the drive axis of the drive device (310) whereupon the drive device induces a torque in the handling device (224) causing the handling device to rotate, thereby causing the object (108) held by the handling device to rotate.

Abstract: A printing system for printing on an outer surface of a tubular object is provided. The printing system comprises at least one printing station for printing on the outer surface of the tubular object (100); and at least one holding device for holding the tubular object during a printing process. The holding device comprises: a substantially annular gripper ring (200) adapted to be partially inserted into a tubular object. The gripper ring comprises a radially compressible portion (201) configured to securely engage with an inner surface of the tubular object. The radially compressible portion exerts a radially outward mechanical restoring force when compressed.

Abstract: A system for transmitting rotational motion between a driving element and a driven element comprises a driving element that is coupled to a torque input that causes the driving element to rotate about a drive axis. The driving element comprises a first magnetic element. A driven element is configured to rotate about a driven axis. The driven element comprises a second magnetic element. Both the first magnetic element and second magnetic element are susceptible to a magnetic field, and at least one of the first and second magnetic element produces a magnetic field. A magnetic interaction between the first magnetic element and the second magnetic element couples the rotational motion of the driving element and the rotational motion of the driven element. The driving and driven elements are coupled at a predetermined rotational orientation with respect to each other.

Abstract: A maintenance cap is provided for in-situ attachment to a printhead of printing apparatus. The maintenance cap comprises a housing defining at least one chamber for receiving a liquid. An opening in the housing provides a path for the liquid to pass from the chamber into a portion of the printhead when the maintenance cap is engaged with the printhead. The maintenance cap also includes a seal disposed around the opening for engagement with the printhead. A transducer coupled to the housing is used to generate ultrasound acoustic waves in the liquid contained in the chamber and printhead so as to clean the printhead.

Abstract: The present disclosure provides a system for transmitting rotational motion between a driving element and a driven element. The system comprises a driving element that is coupled to a torque input that causes the driving element to rotate about a drive axis. The driving element comprises a first magnetic element. A driven element is configured to rotate about a driven axis. The driven element comprises a second magnetic element. Both the first magnetic element and second magnetic element are susceptible to a magnetic field, and at least one of the first and second magnetic element produces a magnetic field. A magnetic interaction between the first magnetic element and the second magnetic element couples the rotational motion of the driving element and the rotational motion of the driven element. The driving and driven elements are coupled at a predetermined rotational orientation with respect to each other.

Abstract: A printing system for printing on an outer surface of a tubular object is provided. The printing system comprises at least one printing station for printing on the outer surface of the tubular object (100); and at least one holding device for holding the tubular object during a printing process. The holding device comprises: a substantially annular gripper ring (200) adapted to be partially inserted into a tubular object. The gripper ring comprises a radially compressible portion (201) configured to securely engage with an inner surface of the tubular object. The radially compressible portion exerts a radially outward mechanical restoring force when compressed.

Abstract: A printing apparatus for printing onto objects is disclosed. The apparatus comprises a plurality of carrying devices (104) for carrying objects (108) to be printed on, the carrying devices (104) each comprising a rotatable handling device configured to hold and rotate an object. A track (102) defines a path along which each of the plurality of carrying devices can be moved. A plurality of processing stations (106A-106F) are arranged along the track and comprising at least one printing station (106C). A controller (110) is configured to independently control the position and speed of each of the carrying devices (104) with respect to the track. The handling device is arranged to rotate an object at at least one of the plurality of processing stations by coupling to a driving device (610) disposed at the at least one processing station such that torque is transmitted from the driving device to the handling device.

Abstract: The present disclosure provides an apparatus for handling objects. The apparatus comprises a carrying device (104) that is configured to move along a track (102). A handling device (224) is adapted to hold an object (108) and is mounted to the carrying device (104) such that it is rotatable with respect to the carrying device about a handling axis (226). A drive device (310) is disposed at a position along the track (102) and configured to produce a torque around a drive axis. The carrying device (104) can be moved along the track (102) in a direction perpendicular to the drive axis into and out of a drive position. In the drive position, the handling axis (226) of the handling device (224) is in substantial alignment with the drive axis of the drive device (310) whereupon the drive device induces a torque in the handling device (224) causing the handling device to rotate, thereby causing the object (108) held by the handling device to rotate.

Abstract: A maintenance cap is provided for in-situ attachment to a printhead of printing apparatus. The maintenance cap comprises a housing defining at least one chamber for receiving a liquid. An opening in the housing provides a path for the liquid to pass from the chamber into a portion of the printhead when the maintenance cap is engaged with the printhead. The maintenance cap also includes a seal disposed around the opening for engagement with the printhead. A transducer coupled to the housing is used to generate ultrasound acoustic waves in the liquid contained in the chamber and printhead so as to clean the printhead.

Abstract: An apparatus for controlling ink pressure in a printhead, the apparatus comprising: an integrally formed structure having: at least one control reservoir separated into first and second chambers by a weir; at least one inlet passageway, extending from the first chamber to an inlet port on an edge of the structure, for supplying ink from a remote source into the first chamber of the reservoir; at least one fluid outlet passageway, extending from the second chamber to an outlet port on an edge of the structure, for recirculating fluid from the reservoir to the remote source of ink; and at least one ink supply port, in communication with the first chamber, for supplying ink to, or receiving ink from, a printhead.

Abstract: A printhead maintenance cap for attachment to a printhead, the cap comprising: a main body defining a chamber into which rinse fluid passes from the printhead during a cleaning cycle; a seal for engagement with the printhead prior to a cleaning cycle starting; and a venting system for equalizing the pressure in the chamber and the surrounding atmosphere.

Abstract: A method of cleaning an electrostatic printhead which has one or more ejection tips from which, in use, ink is ejected, the method comprising: stopping a prior flow of ink to a region around the ejection tip(s) for, in use, printing; causing a pressure differential to occur at the tip region thereby causing the ink meniscus to retreat from the tip; and passing a rinse into the tip region to clean the tip.

Abstract: An apparatus for controlling ink pressure in a printhead, the apparatus comprising: an integrally formed structure having: at least one control reservoir separated into first and second chambers by a weir; at least one inlet passageway, extending from the first chamber to an inlet port on an edge of the structure, for supplying ink from a remote source into the first chamber of the reservoir; at least one fluid outlet passageway, extending from the second chamber to an outlet port on an edge of the structure, for recirculating fluid from the reservoir to the remote source of ink; and at least one ink supply port, in communication with the first chamber, for supplying ink to, or receiving ink from, a printhead.

Abstract: A method of cleaning an electrostatic printhead which has one or more ejection tips from which, in use, ink is ejected, the method comprising: stopping a prior flow of ink to a region around the ejection tip(s) for, in use, printing; causing a pressure differential to occur at the tip region thereby causing the ink meniscus to retreat from the tip; and passing a rinse into the tip region to clean the tip.

Abstract: A printhead maintenance cap for attachment to a printhead, the cap comprising: a main body defining a chamber into which rinse fluid passes from the printhead during a cleaning cycle; a seal for engagement with the printhead prior to a cleaning cycle starting; and a venting system for equalising the pressure in the chamber and the surrounding atmosphere.

Abstract: A printhead comprising: a housing having an inlet for the supply of ink; an array of ejection locations for the ejection of ink droplets; an ink supply pathway for the passage of ink from the inlets to the ejection locations, wherein the ink supply pathway comprises at least one divergent ink manifold; and an outlet manifold for receiving ink from the ejection locations.