INTERRUPTED SEALING WHEEL FOR PRESSURE SEAL MEDIA AND RELATED METHOD

摘要

Apparatus and related method for activating pressure sensitive adhesive on predetermined portions of a business form (9) in order to fasten the first sheet to a second sheet are provided which include at least one sealer wheel (2) formed with an interrupted surface pattern for applying pressure along the adhesive to effect a rhythmically interrupted sequence of sealed spots between the first and second sheets. Preferably two successive sealer wheels (2, 6) apply helical pressure patterns substantially at right angles to one another to form a criss-cross sealed pattern on marginal edges of the form.