A machine for processing a screen printing frame includes an upstream end and an opposed downstream end, a grinding assembly located between the upstream and downstream locations, wherein the grinding assembly includes a first grinder configured to grind a first pattern into the screen printing frame and a second grinder configured to grind a second pattern into the screen printing frame different from the first grinding pattern.

A machine for processing a screen printing frame includes an upstream end and an opposed downstream end, a grinding assembly located between the upstream and downstream locations, wherein the grinding assembly includes a first grinder configured to grind a first pattern into the screen printing frame and a second grinder configured to grind a second pattern into the screen printing frame different from the first grinding pattern.

A tool for applying consistent pressure on a flat surface includes a housing, the housing including an exterior portion and an interior hollow portion; a contact member contained within the interior hollow portion; a spring arranged in the interior hollow portion and configured so as to apply a biasing force on the spherical contact member so that a portion of the spherical contact member protrudes from the interior hollow portion; the exterior portion comprising a flat portion having an opening therein, such that the spherical contact member protrudes from the interior hollow portion through the opening; the opening including a first area; the flat portion comprising a second area; wherein a ratio of the second area over the first area is at least two.