Tensioning device for the screen fabric in silk screen printing frames
OwnerElmar Messerschmittinventor
Life of this patent
Estimating the term…
Abstract
A silk screen printing frame includes a tensioning device for tensioning the silk screen printing fabric in such a way that in the side walls of the frame a groove of C-shaped cross-section is arranged. To tension the screen fabric, the fabric is looped around a clamping strip, which is inserted into the groove opening. The clamping strip is elastically deformable and occupies an increased width under tension, so that after the clamping strip has snapped into the groove, the screen fabric is taut. The clamping strip is arcuate and consists of an elastically bendable spring material of plastic or metal.
Claims9
A clamping device for a printing frame for tensioning sheet type material, comprising a tension bar having a c-shaped longitudinal groove with front and rear undercuts;
- and a clamping strip consisting of resilient material and holding said sheet type material in said groove under unilaterial tension, wherein said clamping strip is concave toward an opening of said groove and the width of the opening of said groove plus said rear undercut are less than the thickness of said sheet type material plus the width of the clamping strip.
A clamping device for a printing frame for tensioning sheet type material, comprising a tension bar having a c-shaped longitudinal groove with front and rear undercuts, the front undercut having a catch;
- and a clamping strip holding said sheet type material in said groove under unilateral tension, wherein said clamping strip is concave toward an opening of said groove and the width of the opening of said groove plus said rear undercut are less than the thickness of said sheet type material plus the width of the clamping strip, and wherein the clamping strip snaps into said catch in said front undercut under tension with the sheet type material.
A clamping device for a printing frame for tensioning sheet type material, comprising a tension bar having a c-shaped longitudinal groove with front and rear undercuts;
- a clamping strip holding said sheet type material in said groove under unilateral tension, wherein said clamping strip is concave toward an opening of said groove and the width of the opening of said groove plus said rear undercut are less than the thickness of said sheet type material plus the width of the clamping strip;
- and, a tension strap fitted into a portion of said groove left free by said clamping strip and joining tension bars of adjacent clamping devices to retain diagonally free material.
Dependencies are inferred from the claim text.