Process of manufacturing rocker arm

Claim 1

THAT PROCESS OF FORMING A ROCKER ARM COMPRISING SHAPING A PIECE OF SHEET METAL INTO A CHANNEL SHAPE HAVING OPPOSED SIDE WALLS EXTENDING UPWARDLY FROM THE BOTTOM OF THE CHANNEL SHAPE AND SO SHAPING THE SAME AS TO DEFORM THE BOTTOM OF THE CHANNEL DOWNWARDLY INTO A TROUGH EXTENDING TRANSVERSELY OF THE CHANNEL AND SPACED BETWEEN THE OPPOSITE ENDS THEREOF AND SO SHAPING SAID TROUGH THAT IT CONSTITUTES IN CROSS SECTION SUBSTANTIALLY A SEMI-CIRCLE, POSITIONING A SUPPORTING DIE HAVING AN UPWARDLY CONCAVE SUBSTANTIALLY SEMI-CIRCULAR IN CROSS SECTION BOTTOM END DIE FACE WHICH IS COMPLEMENTARY WITH THE SEMI-CIRCULAR CROSS SECTIONAL SHAPE OF SAID TROUGH BETWEEN THE SIDE WALLS OF THE CHANNEL SHAPE SUPERPOSING SAID TROUGH AND SUPPORTING SAID SIDE WALLS AGAINST PIERCING PRESSURE FROM THE OUTSIDE INWARDLY, AND SO POSITIONING SAID DIE THAT THE SEMI-CIRCULAR BOTTOM END FACE THEREOF FORMS SUBSTANTIALLY A CIRCULAR CONTINUATION OF THE INNER SEMI-CIRCULAR CONTOUR OF THE TROUGH, ADVANCING A PIERCING PUNCH WHICH CIRCULAR IN CROSS SECTION THROUGH EACH SIDE WALL OF THE CHANNEL SHAPE FROM THE OUTSIDE INWARDLY AND AT OPPOSITE ENDS OF THE TROUGH FORMING A CIRCULAR APERTURE IN EACH SIDE WALL OF THE CHANNEL SHAPE AND WHEREIN SAID TWO APERTURES ARE DISPOSED IN AXIAL ALIGNMENT AND WITH THE BOTTOM SUBSTANTIALLY SEMI-CIRCULAR PORTION OF EACH APERTURE REGISTERING WITH THE ARCUATE PLANAR CONTINUATION OF THE MAJOR PORTION OF THE SEMICIRCULAR CONTOUR OF THE SIDE WALL BOTTOM OF THE TROUGH AND WITH THE UPPER SEMI-CIRCULAR PORTION OF EACH APERTURE REGISTERING WITH THE CROSS SECTIONAL SHAPE OF THE BOTTOM END FACE OF THE SUPPORTING DIE THAT IS POSITIONED BETWEEN THE SIDE WALLS.