| 摘要 |
An apparatus for folding and sealing a sheet having a pressure sensitive adhesive positioned thereon includes a first roller having a number of sealing protrusions which extend therefrom. The apparatus also includes a second roller having a roller surface which is positioned in operative contact with the number of sealing protrusions of the first roller during advancement of the sheet between the first roller and the second roller. The apparatus also includes a biasing lever arm having a first end and a second end. The biasing lever arm is pivotally coupled to the frame member at a pivot location between the first end and the second end. The biasing lever arm is coupled to the first roller at a journal location between said first end of said biasing lever arm and said pivot location. The apparatus also includes a spring coupled to the biasing lever arm, wherein spring force generated by the spring is transferred to the first roller by the biasing lever arm so as to apply a sealing force to the pressure sensitive adhesive during advancement of the sheet between the number of sealing protrusions of the first roller and the second roller. A method of folding and sealing a sheet having a pressure sensitive adhesive positioned thereon is also disclosed.
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