Stitching Tolerance

Dave asks,

 We have an old foot pedal stitcher we manually stitch boxes with. Is there a standard spacing between staples that we must maintain?

Dave, this was a new one for me.  Took a bit of research using a number of resources, but this should address your question.

Singlewall: Starting and ending staples shall be 1 to 1½ inches from the flap score lines.  Intermediate staples shall be spaced no more than 2½ inches apart.

Doublewall: Starting and ending staples shall be double stitched no more than 1 to 1½ inches from the flap score lines.  Intermediate staples shall be spaced no more than 2½ inches apart.  For products weighting 100 lbs. or more spacing of intermediate staples shall be reduced to 1 to 1½ inches apart.

Triplewall: Starting and ending staples shall be double stitched no more than 1 to 1½ inches from the flap score lines.  Intermediate staples shall be double stitched and spaced no more than 1 to 1½ inches apart.

— Ralph

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