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AssigneeMerck Patent GmbH
InventorsLeticia GARCIA DIEZ, Edgar BOEHM, Volker HILARIUS
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In the case of a method for operating a printing device (1), wherein a fluid that is provided for a printing procedure is supplied from a fluid storage container (6) by way of a supply line (14) to a printing head (13) so as to be able to be applied by the printing head (13) onto a surface, the fluid in a purification circuit (2) is conveyed through a purification installation (8), and by way of a contamination-measurement installation (11) a key contamination indicator of a fluid-specimen quantity in the purification circuit (2) is determined such that a printing procedure by way of which the fluid is dispensed from the printing head (13) commences only once the key contamination indicator has undershot a first threshold value. The invention also relates to a printing device (1) having a printing head (13) and having a connector installation (12) for a fluid storage container (6), said connector installation (12) being connected to the printing head (13) by way of a supply line (14), wherein the printing device (1) has a purification circuit (2) that is formed from fluid-line portions (3, 4, 5) and has a purification installation (8) and has a contamination-measurement installation (11) in which the fluid that by way of the fluid retrieval installation has been retrieved form the fluid storage container (6) can be purified, and a key contamination indicator of a fluid-specimen quantity in the purification circuit (6) can be determined before the purified fluid is supplied to the printing head (13).
Method for operating a printing device (1), wherein a fluid that is provided for a printing procedure is supplied from a fluid storage container (6) by way of a supply line (14) to a printing head (13) so as to be able to be applied by the printing head (13) onto a surface, characterized in that the fluid in a purification circuit (2) is conveyed through a purification installation (8), and by way of a contamination-measurement installation (11) a key contamination indicator of a fluid-specimen quantity in the purification circuit (2) is determined, and in that a printing procedure by way of which the fluid is dispensed from the printing head (13) commences only once the key contamination indicator has undershot a first threshold value.
Printing device (1) having a printing head (13) and having a connector installation (12) for a fluid storage container (6), said connector installation (12) being connected to the printing head (13) by way of a supply line (14) such that the fluid from the fluid storage container (6) can be supplied to the printing head (13) and be applied by the printing head (13) onto a surface, characterized in that the connector installation (12) has a fluid retrieval installation and a fluid refilling installation for the fluid storage container (6), in that the printing device (1) has a purification circuit (2) that is formed from fluid-line portions (3, 4, 5) and has a purification installation (8) and has a contamination-measurement installation (11) in which the fluid that by way of the fluid retrieval installation has been retrieved from the fluid storage container (6) can be purified, a key contamination indicator of a fluid-specimen quantity in the purification circuit (6) can be determined, and the fluid by way of the fluid refilling installation can again be supplied to the fluid storage container (6), and in that the supply line (14) branches off from the purification circuit (2) and connects the purification circuit (2) to the printing head (13) such that the fluid that perfuses the purification circuit (2) can be supplied to the printing head (13).
Dependencies are inferred from the claim text.