Abstract: A screen-printing squeegee, as well as an apparatus for screen printing, includes an elastic application element and a holding apparatus for the application element. The holding apparatus is divided, as viewed over the width of the application element, into a plurality of holding sections which can move with respect to one another, in which a leaf spring element is provided. The leaf spring element interconnects the holding sections which can move with respect to one another.

Abstract: A method and device are provided for printing at least one printing substrate on a printing support, more particularly a printing table, by use of a digital printing unit. The method feeds the printing substrate onto the printing table, detects the position of the printing substrate on the printing table, and aligns a print image produced by the digital printing unit in accordance with the detected position of the printing substrate.

Abstract: A method of conveying imprint material and a printing table for a flatbed printing machine are described. The method of conveying imprint material, particularly solar cell wafers, in and out of a processing area of a flatbed printing machine includes the steps of moving the imprint material by means of a conveyor belt on a first conveyor belt section into the processing area, processing the imprint material and further moving the imprint material on the first conveyor belt section out of the processing area. An automatic checking of the first conveyor belt section for soiling or damage takes place and, as a function of the checking result, a moving-back of the first conveyor belt section into the processing area or a moving of a second conveyor belt section into the processing area takes place.

Abstract: A method and device for printing solar cells by screen printing is provided. During the pressure movement of the doctor blade, the printing screen is raised at the end thereof which at the rear with respect to the doctor blade movement direction during printing in order to maintain a screen release angle between the screen and the solar cell behind the doctor blade above a critical value. The method and device may be used for printing surface contacts or flat coatings on solar cells.

Abstract: A printing installation for printing on curved surfaces, includes a squeegee, a printing screen maintained in a screen frame, and a drive for moving the squeegee. The screen frame, on at least one side thereof, is flexible in at least some sections thereof. The screen printing device is used, for example, for printing on curved vehicle window panes.

Abstract: Squeegee assembly for a screen printing machine with a printing table, wherein the squeegee assembly has at least one squeegee, one squeegee holder and at least one support displaceable across the printing table, wherein the squeegee is held on the support by means of the squeegee holder and can be pressed against the printing table by pressure cylinders, characterized in that the support has a U-shaped profile, and at least the cylinder sections of the pressure cylinders are accommodated within the U-shaped profile.

Abstract: The invention relates to a machining line for plate-type elements, particularly solar cells. According to the invention, a machining station and a positioning station for aligning the plate-type elements relative to a reference point with a predefined position tolerance are provided. The positioning station is connected to the input side of the machining station in the flow direction of the material, and conveying devices are provided for moving the plate-type elements from the positioning station to the machining station while maintaining the predefined position tolerance.

Abstract: A cleaning method for the screen stencil of a silk-screen printing machine. According to the method, prior to an intermediate printing process designed to clean the screen stencil, the underside of the stencil is wetted with a cleaning agent that dissolves dye. An intermediate printing device includes an intermediate printing roll that can be displaced back and forth. A rotating roll that is immersed in a cleaning bath is situated at the front end of the intermediate printing roll. The rotating roll can be brought into contact with the underside of the screen stencil prior to the intermediate printing process by means of a pivoting device.

Abstract: A device for screen printing includes a bearing surface for an object which is to printed and a printing mechanism including at least one printing mechanism frame and a doctor blade holder for securing a doctor blade which can be displaceably guided in a longitudinal direction in the printing mechanism frame and which extends in a transversal manner inside the printing mechanism frame. The printing mechanism is arranged in a displaceable manner on a plane extending parallel to the longitudinal direction and at least in a perpendicular manner on the bearing surface, and a mechanism is provided for coordinated displacement of the printing mechanism and doctor blade holder. The device may be used, for example, for printing curved vehicle windshields.

Abstract: A screen printing squeegee doctor blade includes an elastic application element and a maintaining or gripping device. The grip is subdivided into several grip sections which can be displaced in relation to each other over the width of the screen printing doctor blade. The squeegee may be used, for example, for printing curved vehicle windshields.

Abstract: A method of conveying imprint material and a printing table for a flatbed printing machine are described. The method of conveying imprint material, particularly solar cell wafers, in and out of a processing area of a flatbed printing machine includes the steps of moving the imprint material by means of a conveyor belt on a first conveyor belt section into the processing area, processing the imprint material and further moving the imprint material on the first conveyor belt section out of the processing area. An automatic checking of the first conveyor belt section for soiling or damage takes place and, as a function of the checking result, a moving-back of the first conveyor belt section into the processing area or a moving of a second conveyor belt section into the processing area takes place.

Abstract: A centering system for a screen printing apparatus includes a platform for the placement of a plate to be printed, abutment wheels arranged on the platform, longitudinally adjustable servo shafts, beams, and a stationary frame on which the beams are arranged. The wheels are configured to contact the outside edges of the plate and secure the position of the plate for further processing. The longitudinally adjustable servo shafts lie above the platform, and the abutment wheels are mounted on the servo shafts. The beams are arranged above the platform, and the servo shafts are mounted beams.

Abstract: A flatbed printing machine includes at least one adjustable side stop in an infeed area for the medium to be printed. The side stop is arranged between an infeed area edge and a feeder edge over which the medium to be printed is carried. The side stop is adjustable in a guide parallel to the infeed area edge and to the feeder edge. A link belt is provided, which link belt is capable of tracking the side stop and covering a gap that would otherwise occur between the infeed area edge and the feeder edge.

Abstract: A flatbed printing machine is provided with a printing table and a pressing device for a medium to be printed. The pressing device features parallel guide rails on both sides of the printing table, through which a pressing rail that is moveable above the printing table is guided. The pressing device is particularly applicable to a digital ink-jet flatbed printing machines.

Abstract: A printing table for a flatbed printing machine, for example, a large format digital flatbed printing machine, has a printing table base and a printing table plate disposed on the printing table base. The printing table base is connected by several connecting elements to the printing table plate. The connecting elements permit movement of the printing table plate relative to the printing table base, in particular movement caused by thermal expansion, only in a direction parallel to the printing table surface and only proceeding from a certain area of the printing table plate, the area having a point or line form and being fixed relative to the printing table base.

Abstract: A printing table for flatbed printers, for example, for digital flatbed printers, includes a printing table cover plate, a printing table bottom plate, and a printing table intermediate plate, which is disposed between the printing table cover plate and the printing table bottom plate. The printing table intermediate plate is provided with channels for conveying coolant.

Abstract: Squeegee assembly for a screen printing machine with a printing table, wherein the squeegee assembly has at least one squeegee, one squeegee holder and at least one support displaceable across the printing table, wherein the squeegee is held on the support by means of the squeegee holder and can be pressed against the printing table by pressure cylinders, characterized in that the support has a U-shaped profile, and at least the cylinder sections of the pressure cylinders are accommodated within the U-shaped profile.

Abstract: The invention relates to a cleaning method for the screen stencil of a silk-screen printing machine. According to said method, prior to an intermediate printing process designed to clean the screen stencil, the underside of said stencil is wet with a cleaning agent that dissolves dye. The invention also relates to an intermediate printing device comprising an intermediate printing roll that can be displaced back and forth. A rotating roll that is immersed in a cleaning bath is situated at the front end of said intermediate printing roll. The rotating roll can be brought into contact with the underside of the screen stencil prior to the intermediate printing process by means of a pivoting device.

Abstract: The invention relates to a screen-printing machine which comprises a gripping mechanism connected to a printing board used for inputting and outputting a printed article. Said gripping mechanism is provided several grippers which are disposed on a conveyor belt. A flexible and flat support preferably made of fabric is arranged between each pair of grippers. The printed article is placed on the support when it is transferred over the printing board. Said invention prevents the rear face of the printed article from being damaged.

Abstract: Disclosed is a top part of a screen printing machine, wherein the bearing elements (4,4a) for the screen printing stencil (2) are respectively and directly guided and held on lateral longitudinal guide elements (10,11) by means of carriages (9), enabling said bearing elements (4, 4a) to be adjusted in relation to each other and to be fixed. Said configuration makes it possible for the screen printing stencil (2) to be held in a stable and exact manner, irrespective of the size thereof. According to the invention, one of the bearing elements (4a) can also be raised in order to lift the screen printing stencil (2) when pressed against the other bearing element (4). The bearing elements (4, 4a) are thus respectively held on the carriers thereof (7,8) by means of pivoting hinges (5, 6).