Abstract: The invention relates to a method for printing a surface (2) with a fluid which contains an organic semiconductor material. The fluid is transported from a storage container (7) through a supply line (5) to a printing head (3), which can be moved over the surface (2), and printed onto the surface (2) by the printing head (3). At least one part of the fluid which is transported through the supply line (5) to the printing head (3) is returned to the storage container (7) via a return line (6), wherein a fluid circuit is formed, and the fluid in the fluid circuit flows through a cleaning device (12) with which the fluid is cleaned. The fluid returned to the storage container (7) flows around and surrounds the fluid being transported in the supply line (5) to the printing head (3) at least in some regions.

Abstract: In the case of a method for filling a transportation container (12) with a fluid, the fluid in a purification circuit (1) is conveyed multiple times through the purification installation (7), and by way of a contamination-measurement installation (15) a key contamination indicator of a fluid-specimen quantity in the purification circuit (1) is determined, wherein a filling procedure of the transportation container (12) with the fluid is terminated only once the key contamination indicator undershoots a first threshold value. The fluid-specimen quantity that is provided for determining the key contamination indicator may be diverted from the purification circuit (1), be infed to the contamination-measurement installation (15), and upon determining the key contamination indicator be returned to the purification circuit (1).

Abstract: In the case of a method for filling a transportation container (12) with a fluid, the fluid in a purification circuit (1) is conveyed multiple times through the purification installation (7), and by way of a contamination-measurement installation (15) a key contamination indicator of a fluid-specimen quantity in the purification circuit (1) is determined, wherein a filling procedure of the transportation container (12) with the fluid is terminated only once the key contamination indicator undershoots a first threshold value. The fluid-specimen quantity that is provided for determining the key contamination indicator may be diverted from the purification circuit (1), be infed to the contamination-measurement installation (15), and upon determining the key contamination indicator be returned to the purification circuit (1).

Abstract: The invention relates to a method for printing a surface (2) with a fluid which contains an organic semiconductor material. The fluid is transported from a storage container (7) through a supply line (5) to a printing head (3), which can be moved over the surface (2), and printed onto the surface (2) by the printing head (3). At least one part of the fluid which is transported through the supply line (5) to the printing head (3) is returned to the storage container (7) via a return line (6), wherein a fluid circuit is formed, and the fluid in the fluid circuit flows through a cleaning device (12) with which the fluid is cleaned. The fluid returned to the storage container (7) flows around and surrounds the fluid being transported in the supply line (5) to the printing head (3) at least in some regions.

Abstract: A purification device (1), for the purification of a liquid-crystal mixture, has a flow chamber (2) which has an inlet opening (3) and an outlet opening (4), arranged opposite the inlet opening, in order to be able to introduce the liquid-crystal mixture into the flow chamber (2) and discharge it from the latter, and at least one flow distribution element (5) which is arranged in the flow chamber (2) in the region of the inlet opening (3), and at least one filter element (6) which is arranged in the region of the outlet opening (4), where a length of the flow chamber (2) measured in the flow direction is at least a factor of 2 greater than a greatest internal dimension of the flow chamber (2) transverse to the flow direction.

Abstract: The invention relates to a filling device (1) for dispensing a fluid into at least one container, where the filling device (1) has a weighing system (2) and a filling-needle system (3). The weighing system (2) has a positioning device (4) which can be adapted to a container diameter and which may have an annular design. The weighing system (2) is arranged on an accommodation platform (7) which can be moved vertically by means of a linear unit. The filling-needle system (3) is arranged on a displacement unit in a position at a distance in the axial direction above the positioning device (4).

Abstract: A purification device (1), for the purification of a liquid-crystal mixture, has a flow chamber (2) which has an inlet opening (3) and an outlet opening (4), arranged opposite the inlet opening, in order to be able to introduce the liquid-crystal mixture into the flow chamber (2) and discharge it from the latter, and at least one flow distribution element (5) which is arranged in the flow chamber (2) in the region of the inlet opening (3), and at least one filter element (6) which is arranged in the region of the outlet opening (4), where a length of the flow chamber (2) measured in the flow direction is at least a factor of 2 greater than a greatest internal dimension of the flow chamber (2) transverse to the flow direction.

Abstract: The invention relates to a filling device (1) for dispensing a fluid into at least one container, where the filling device (1) has a weighing system (2) and a filling-needle system (3). The weighing system (2) has a positioning device (4) which can be adapted to a container diameter and which may have an annular design. The weighing system (2) is arranged on an accommodation platform (7) which can be moved vertically by means of a linear unit. The filling-needle system (3) is arranged on a displacement unit in a position at a distance in the axial direction above the positioning device (4).

Abstract: The invention relates to cover slips coated with covering medium for covering specimens and to machine processes for the production thereof. The cover slips according to the invention greatly simplify the covering of specimens since firstly there is no need to handle the tacky covering medium and secondly the specimens are permanently covered after just a few minutes and can be investigated under a microscope even using immersion objectives. The covering medium layer thicknesses and layer-thickness tolerances according to the invention produce stable and durable covering.