A printing device for printing substrates, such as circuit boards, wafers, or solar cells, has at least one movably mounted printing unit with a working surface on which the substrate to be printed can be placed. The printing unit is paired with a transport belt device, which has a supply roller with a transport belt wound thereon, a collection roller for winding up the transport belt, and two deflecting surfaces, in particular deflecting rollers, which are paired with the working surface. The transport belt is guided by the supply roller over one deflecting surface and onto the working surface in order to form a contact surface for the substrates, and by the working surface over the other deflecting surface to the collection roller. The deflecting surfaces can be moved together with the respective printing unit. The supply and collection rollers are held on the printing device in a stationary manner.

A printing device for printing substrates, such as circuit boards, wafers, or solar cells, has at least one movably mounted printing unit with a working surface on which the substrate to be printed can be placed. The printing unit is paired with a transport belt device, which has a supply roller with a transport belt wound thereon, a collection roller for winding up the transport belt, and two deflecting surfaces, in particular deflecting rollers, which are paired with the working surface. The transport belt is guided by the supply roller over one deflecting surface and onto the working surface in order to form a contact surface for the substrates, and by the working surface over the other deflecting surface to the collection roller. The deflecting surfaces can be moved together with the respective printing unit. The supply and collection rollers are held on the printing device in a stationary manner.

A screen printing machine configured to print solder onto a surface of a circuit board using a screen mask. The screen printing machine is provided with: a screen mask arranged at a top side of the circuit board; a box member arranged at an underside of the circuit board including a space that is closed by the circuit board; a negative pressure generator connected to the space of the box member and configured to create negative pressure inside the space; a sensor configured to detect a pressure inside the space; and a control device configured to control the negative pressure generator based on the pressure detected by the sensor.

A screen-printing machine includes a mask holding device; a board holding device configured to grip a board; a positioning device to relatively position the board and the mask; and a control device. The board holding device includes a lifting and lowering table positioned in an up-down direction by a lifting and lowering mechanism, and a backup block including a mounting surface on which the board is placed, an installation surface disposed parallel to the mounting surface on an opposite side thereof, multiple suction holes to penetrate in a thickness direction between the mounting surface and the installation surface, and a chamber recessed section formed on an installation surface side so as to surround positions of the multiple suction holes, and in which an air chamber made by the chamber recessed section is configured when the backup block overlaps an upper face of the lifting and lowering table.

Various embodiments of the teachings herein include a method for stencil printing a layer on or onto a printing surface with a stencil comprising applying a stencil with a first part and a second part to the printing surface and applying a layer of material to the printing surface through the stencil. The first part and the second part cover a non-continuous region of the printing surface.

A device for fixing different-sized base area objects with a vacuum including on a table: first, second, and third vacuum chambers. The third chamber extending the first and second chambers to the entire x direction extension, and the second chamber having parallel, line-forming grooves in the x direction and connected to each other by a first connection channel in the y direction and being released/closed serially relative to the first chamber by a line-switching device. The third chamber includes parallel, column-forming grooves extending in the y direction and connected to each other via a second connection channel in the x direction and being released/closed serially relative to the first chamber by a column-switching device. The third chamber being released/closed serially in the y direction by the line-switching device, in a simultaneous, segmented manner according to the number and positions of the line-forming grooves in correspondence with the second chamber.

A device for fixing different-sized base area objects with a vacuum including on a table: first, second, and third vacuum chambers. The third chamber extending the first and second chambers to the entire x direction extension, and the second chamber having parallel, line-forming grooves in the x direction and connected to each other by a first connection channel in the y direction and being released/closed serially relative to the first chamber by a line-switching device. The third chamber includes parallel, column-forming grooves extending in the y direction and connected to each other via a second connection channel in the x direction and being released/closed serially relative to the first chamber by a column-switching device. The third chamber being released/closed serially in the y direction by the line-switching device, in a simultaneous, segmented manner according to the number and positions of the line-forming grooves in correspondence with the second chamber.

A tooling vacuum unit for a circuit board assembly machine, such as a printing machine, which enables two different vacuum sources to be connected to tooling. The tooling vacuum unit may be a retrofittable unit configured to sit on top of a standard tooling table in the machine, or an integrated part of the machine, and provides a tooling support surface for a workpiece being machined. Also described are suction nozzles for securing a printing screen relative to the workpiece.

A tooling vacuum unit for a circuit board assembly machine, such as a printing machine, which enables two different vacuum sources to be connected to tooling. The tooling vacuum unit may be a retrofittable unit configured to sit on top of a standard tooling table in the machine, or an integrated part of the machine, and provides a tooling support surface for a workpiece being machined. Also described are suction nozzles for securing a printing screen relative to the workpiece.

A printing device for printing substrates, such as circuit boards, wafers, or solar cells, has at least one movably mounted printing unit with a working surface on which the substrate to be printed can be placed. The printing unit is paired with a transport belt device, which has a supply roller with a transport belt wound thereon, a collection roller for winding up the transport belt, and two deflecting surfaces, in particular deflecting rollers, which are paired with the working surface. The transport belt is guided by the supply roller over one deflecting surface and onto the working surface in order to form a contact surface for the substrates, and by the working surface over the other deflecting surface to the collection roller. The deflecting surfaces can be moved together with the respective printing unit. The supply and collection rollers are held on the printing device in a stationary manner.