Abstract: A mounting bracket for releasably mounting an article such as a sign or picture frame to a substantially flat surface such as a wall. The bracket has an adhesive disc securely attached to one side of the bracket and the opposite side of the adhesive disc has a releasable adhesive face for attaching to the wall. A tool inserted into the mounting bracket applies a rotative force to the mounting bracket for applying a shear force to the releasable adhesive face which causes the adhesive face to release from the wall. The mounting bracket is releasably mounted to a sign, which allows easy installation and removal of the sign from the wall.

Abstract: A mounting bracket for releasably mounting an article such as a sign or picture frame to a substantially flat surface such as a wall. The bracket has an adhesive disc securely attached to one side of the bracket and the opposite side of the adhesive disc has a releasable adhesive face for attaching to the wall. A tool inserted into the mounting bracket applies a rotative force to the mounting bracket for applying a shear force to the releasable adhesive face which causes the adhesive face to release from the wall. The mounting bracket is releasably mounted to a sign, which allows easy installation and removal of the sign from the wall.

Abstract: A hand operated ink stamp comprising an outer casing having an open bottom and an opening in the upper surface. A printing die impregnated with ink is disposed within the casing and is carried by a die holder having an upper magnetically susceptible surface. Mounted within the upper portion of the casing is a magnet, and the magnetic force will hold the die holder and die at a raised position above the surface to be printed. A stem is mounted for sliding movement in the opening in the upper surface of the casing and is connected through a ball and socket joint to the die holder. Manually depressing the stem will overcome the magnetic force to release the die holder from the magnet and cause the die to contact the surface to be printed. The position of the magnet within the casing can be adjusted to thereby vary the printing impression.

Abstract: A method and apparatus for producing printing patterns through the use of a liquid photosensitive resin system. A partially cured resin backing member is applied to a vertical supporting surface and a glass cover plate having a photographic negative mounted on the glass surface is positioned in spaced relation to the backing member. A liquid uncured photosensitive resin is introduced into the space between the backing member and the photographic negative, and an ultra-violet lighting unit is then positioned adjacent the glass cover plate to expose portions of the resin to the light through the photographic negative, causing the exposed portions of the resin to cure or crosslink. The lighting unit is oscillated to provide tapered edges on the exposed crosslinked areas of the resin. Following the crosslinking, the pattern can be removed and the uncured portions of the resin can be washed from the pattern.

Abstract: A method and apparatus for producing printing patterns through the use of a liquid photosensitive resin system. A partially cured resin backing member is applied to a vertical supporting surface and a glass cover plate having a photographic negative mounted on the glass surface is positioned in spaced relation to the backing member. A liquid uncured photosensitive resin is introduced into the space between the backing member and the photographic negative, and an ultraviolet lighting unit is then positioned adjacent the glass cover plate to expose portions of the resin to the light through the photographic negative, causing the exposed portions of the resin to cure or crosslink. The lighting unit is oscillated to provide tapered edges on the exposed crosslinked areas of the resin. Following the crosslinking, the pattern can be removed and the uncured portions of the resin can be washed from the pattern.

Abstract: A molding plate for use in molding printing plates. A type-form plate bearing raised printing or indicia is coated with graphite and placed in a mold cavity with the printed surface being at an angle to the vertical and facing upwardly. A liquid thermosetting resin containing reinforcement is poured into the mold cavity and air is expelled from the upper end of the cavity. The resulting cured thermosetting resin plate has recessed printing impregnated with graphite and serves as a molding plate for forming printing plates from rubber or other materials.