Business forms with pressure activated adhesive or cohesive are handled by a sealing apparatus which has a reduced weight, foot print of equipment, and lower cost to the end user, because of its simple construction. First, second and third rollers are provided which have axes of rotation that are vertically...http://www.google.es/patents/US6179952?utm_source=gb-gplus-sharePatente US6179952 - Pressure sealer three tiered sealing roll configuration
Pressure sealer three tiered sealing roll configuration
