Patent ID: 7264477
Filing Date: 2007-09-04
Classification: B43L,B63C

Abstract:
1. An underwater writing tablet, comprising: first and second plastic rollers positioned in a first direction; first and second rotation knobs fitted at respective ends of said first and second plastic rollers; a cover plate including first and second vellum slots; and a plastic vellum sheet rolled around said first and second plastic rollers and placed over said cover plate and passing through said first and second vellum slots; and tension adjusting means configured to apply pressure on one of said rollers to maintain tension of the plastic vellum sheet rolled around said rollers, wherein said tension adjusting means and said first and second vellum slots maintain a consistent tension in the vellum sheet when the vellum is loaded on the roller and through the vellum slots, and wherein said plastic vellum sheet rolls in a second direction normal to said first direction and between said first and second plastic rollers, when one of said first and second rotation knobs is rotated by said user.