Suction roll perforation design

Claim 1

IN A COMBINATION, A STRAIGHT STATIONARY SEALING STRIP, A SUCTION ROLL HAVING IN ITS CYLINDERICAL SURFACE A PLURALITY OF DRILLED HOLES ARRANGED IN A REGULARLY RECURRING PATTERN OF GENERALLY AXIAL ROWS AND GENERALLY CIRCUMERFERENTIAL COLUMNS, AND MEANS FOR ROTATING SAID ROLL AT HIGH SPEED TO CAUSE SAID ROWS OF HOLES TO PASS SUCCESSIVELY BEYOND SAID SEALING STRIP; THE PROVISION OF AN INCLINATION BETWEEN THE LINE OF EXTEND OF SAID SEALING STRIP AND THE LINE OF EACH ROW OF HOLES SUCH AS TO CAUSE OPTIMUM ATTENUATION OF NOISE IN THE AUDIBLE FREQUENCLY RANGE; WITHIN SaID HOLE PATTERN EACH OF SaID HOLES HAVING A DEPTH H OF 1 TO 4 INCHES AND WITHIN A LATERAL DIMENSION OF 3H/2 FOR EACH FIRST HOLE THERE BEING THREE ADDITIONAL HOLES PERIPERALLY SPACED THEREFROM ONE, TWO AND THREE MULTIPLES OF A DISTANCE D,D BEING SH/30C, WHEREIN C IS THE SPEED OF SOUND IN FEET PER SECOND AND S IS THE PERIPERAL ROLL SURFACE SPEED AND IS WITHIN THE RANGE OF 100 TO 1500 FEET PER MINUTE, SAID HOLES DEFINING THE CORNERS OF A PARALLELOGRAM WITH THE HOLE ONE MULTIPLE OF D AWAY FROM SAID FIRST HOLE, AND BEING THE GREATEST DISTANCE AWAY FROM SAID FIRST HOLE, AND THE HOLE TWO MULITIPLES OF D AWAY FROM SAID FIRST HOLE BEING THE NEXT GREATEST DISTANCE AWAY FROM SAID FIRST HOLE.