Abstract: This invention relates to a watertight cap with a sealing structure comprised of an adhesive strip, which adhesive strip is used to temporarily seal the margin of the cap to the wearer's head. The cap also contains a circumferential foldable crease (or fold-line) located behind the adhesive strip which allows the wearer to fold back the adhesive strip until the cap is properly positioned on the wearer's head. The cap further contains a circumferential border located immediately behind or in front of the foldable crease (or fold-line) which border prevents the adhesive strip from contacting the wearer's hair.

Abstract: Two layers of rubber are sandwiched about a layer of metal to provide a surface for practicing drumming. The bottom surface of the bottom layer is roughened to reduce sliding. The device may also be positioned on its side and struck on its opposite side to simulate the striking of cymbals, or placed on the drum surface to dampen undesirable vibrations.

Abstract: A film matrix is reproduced and altered by mounting a replacing image on a light transparent sheet over the image to be replaced on the film matrix. The image to be replaced is obliterated. The mounted replacing image and the film matrix are then double exposed on another piece of film to produce another film matrix with the replacing image appropriately inserted.