| 摘要 |
Business forms (11) with pressure activated adhesive or cohesive (18, 18) are handled by a sealing apparatus (10) which has a reduced weight, foot print of equipment, and lower cost to the end user, because of its simple construction. First (25), second (26) and third (27) rollers are provided which have axes of rotation (31) that are vertically spaced from each other and are preferably substantially vertically aligned, with the second roller between the first and third rollers. The forms pass through a first nip (24) between the first and second rollers, are re-directed, and then pass through the second nip (24') between the second and third rollers. Preferably forms pass through both nips at the same time to maximize the pressure in both nips. Typically, when passing through each of the nips the rollers exert a force of between about 100-200 pounds per lineal inch. Preferably all of the rollers are driven, such as by a motor connected to the second roller, and with gears acting between the second roller and the first and third rollers. |
