HP LQH-HW 3ULQWHUV manual Chaff Content, Cut-To-Tie Ratio, Perforation Intersections

Chaff Content

Preferred	Unacceptable
Tie Point	Cut Point

Direction of

Forms

Movement

Cut Point Tie Point

Cut-To-Tie Ratio

A common cut-to-tie ratio for bond forms is 4:1 (that is, 80% cut to 20% ties). This value is dictated chiefly by the application program under which the form runs. Lower cut-to-tie ratios will yield better form handling, but stacking may suffer due to increased stiffness of the perforations. Some level of experimentation is required to determine the best cut-to-tie ratio. But remember that a cut-to-tie ratio that causes a thickness buildup of greater than 0.025 inch (0.635 mm) or that creates an evenness variation of greater than 0.003 inch (0.0762 mm) will result in an unreliable and unpredictable form.

Perforation Intersections

Whenever a horizontal perforation intersects with a vertical perforation, the point of intersection must be a tie point. Cut points at such intersections make the form unacceptable.

Chaff Content

Tractors holes should be clear of chaff. As much as possible, there should not be loose chaff in the box in which the paper is packed.

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