Printing stencil for a screen-printing machine and method for its production
OwnerMircea Iliescuinventor
Life of this patent
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Abstract
A printing stencil for a screen-printing machine is proposed, having a frame (1) which holds a screen element and being distinguished by the fact that the screen element is substantially curved in a U shape, and by the fact that its concave side is assigned to a pressure squeegee and its convex side is assigned to the surface to be printed.
Claims9
A printing stencil for a screen-printing machine, having a frame holding a screen element, wherein the screen element is substantially curved in a U shape, and wherein its concave side is assigned to a pressure squeegee and its convex side is assigned to the surface to be printed.
The printing stencil as claimed in one of the preceding claims, which comprises at least one first tensioning device (18) by means of which a tensioning force acting transversely with respect to the longitudinal extent of the frame (1;
- 1′) can be introduced into the screen element.
The printing stencil as claimed in one of the preceding claims, which comprises at least one second tensioning device (24) by means of which a tensioning force acting in the direction of the longitudinal extent of the frame (1;
- 1′) can be introduced into the screen element.
The printing stencil as claimed in one of the preceding claims, wherein a drive device is provided which subjects the printing stencil to a pivoting movement in such a way that the pivot axis (21) runs substantially parallel to the longitudinal extent of the printing stencil.
The printing stencil as claimed in one of the preceding claims, wherein insulating material is provided between the screen element and frame elements (3, 3′), or the frame elements (3, 3′) are produced from electrically nonconductive material.
A method for producing a printing stencil, having the following steps:
- introducing a molding with a substantially U-shaped curved outer surface into a frame (1, 1′) having substantially U-shaped frame elements (3, 3′) arranged at a distance from each other;
- fitting a screen fabric to the convex side of the molding and the frame elements (3, 3′);
- tensioning the screen fabric transversely and longitudinally with respect to the longitudinal extent of the molding and of the frame elements (3, 3′);
- fixing the screen fabric to the convex side of the frame elements (3, 25);
- displacing the frame elements (3, 25) in such a way that their spacing is increased, in order to tension the screen fabric in the longitudinal extent of the molding, and
- fixing the screen fabric to the longitudinal elements (17, 17′) of the frame (1, 1′).
Dependencies are inferred from the claim text.