Method of and apparatus for mounting print screens and their use in printers, as well as a screen frame and a screen-printing machine
OwnerJosef Kleinschnitz, Peter Schmittinventors
Life of this patent
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Abstract
A screen-printing process uses screens each having a frame in which is tensioned a respective mesh. Each of the meshes is tensioned and data representing tensions in the respective meshes is stored in respective memories carried on the frames of the meshes. Subsequently one of the meshes is secured in a holder of a screen-printing machine and the data from the memory of the mesh in the holder is read out. Thereafter tensions in the screens are monitored and, when the monitored tensions differ significantly from the data read out of the respective memory, tensions in the screen are reset.
Claims20
A method of making screens for use in a screen-printing machine, characterized by the following steps:
- a) a screen frame that is or will be provided with a screen is secured and positioned in a holder and its position and orientation are determined;
- b) the mesh is mechanically tensioned and the applied tension is detected;
- c) at least the detected tensions are outputted to a memory provided on the screen frame;
- d) the screen frame is taken out of the holder.
A method of operating a screen-printing machine with print screens, characterized by the following steps:
- a) a screen frame provided with a mesh is secured in a holder;
- b) force data is read from a memory on the screen frame that represent the forces with which the screen in the frame was originally tensioned;
- c) the screen frame is positioned and the current tension forces of the mesh in the screen frame are detected;
- d) if a deviation between the current tension forces and the original forces is detected, the mesh is retensioned.
An apparatus for making or using screen-printing screens wherein it has a holder in which a screen frame is positionable, the position and orientation are detected and a mesh is mechanically secured in or on the frame and that forces applied by the holder to tension the mesh are detectable, and the holder has a read or write device, and that data indicating the position or orientation or applied forces can pass in at least one direction between the read or write device and a memory on the frame.
A screen-printing frame characterized in that it has a plurality of side parts that are connected together by slidable connector elements and have at least one memory in which data relating to tension in or to be applied to a mesh is or can be stored.
A screen printing machine with a holder for screen-printing frames wherein the holder has a reader for reading from a memory on a screen frame data and means for positioning the screen frame and for mechanically tensioning a mesh in the screen frame, in particular depending on the read data.
Dependencies are inferred from the claim text.