Rotary screen printing cylinders

Claim 1

Apparatus for engraving a two-ply rotary screen cylinder with the negative of a pattern to be printed on textiles or the like, comprising means for mounting the rotary screen cylinder for rotation; means for mounting a flat screen matrix, carrying a positive engraving of said pattern, for movement tangentially to said cylinder and so as to rotate said cylinder; means for applying nipping pressure to the matrix and cylinder at the position at which they interengage; means for preadjusting said nipping pressure for causing a blocking medium applied to said matrix to be filled through the matrix and into the interstices of the cylinder, when the matrix is moved and the cylinder rotated, said means for applying nipping pressure comprising squeegee means engaging said matrix and an internal supporting roller located within said cylinder with the axes of said squeegee, said supporting roller and said cylinder being contained in a single plane; and adjusting roller means engaging with said supporting roller, said adjusting rollers being mounted within said cylinder for adjustable movement with said supporting roller in said single plane to adjust the nipping pressure derived from said supporting roller.