Disclosed herein is an electrostatic ink composition comprising a component selected from a fatty acid ester having a plurality of hydroxyl substituents and a fatty acid amide having a plurality of hydroxyl substituents. Also described herein are scratch-off structures and methods for producing them.

An arithmetic educational game, including a game board, including a plurality of first colored shapes disposed on at least a portion of a front surface of the game board, a plurality of second colored shapes disposed on at least a portion of the front surface of the game board, a plurality of third colored shapes disposed on at least a portion of the front surface of the game board, and a plurality of fourth colored shapes disposed on at least a portion of the front surface of the game board, a ball to propel toward the game board, such that the ball connects to at least one of the plurality of first colored shapes, the plurality of second colored shapes, the plurality of third colored shapes, and the plurality of fourth colored shapes, and a plurality of cards to be drawn in response to the ball connecting to at least one of the plurality of first colored shapes and the plurality of second colored shapes.

A customizable playing card having: a plurality of connectable surfaces, wherein each surface is capable of being removably adhered to each other surface via static electricity; a first card component having: a front first card component face; and a back first card component face; and a second card component that joins with the first card component via the static electricity; the second card component having: a front second card component face; and a back second card component face; wherein the first card component connects to the second card component such that the front first component face is the front card face; and such that the front second component face is opposite to the front first component face and is the back card face.

A customizable playing card having: a plurality of connectable surfaces, wherein each surface is capable of being removably adhered to each other surface via static electricity; a first card component having: a front first card component face; and a back first card component face; and a second card component that joins with the first card component via the static electricity; the second card component having: a front second card component face; and a back second card component face; wherein the first card component connects to the second card component such that the front first component face is the front card face; and such that the front second component face is opposite to the front first component face and is the back card face.

Disclosed herein is an electrostatic ink composition comprising a component selected from a fatty acid ester having a plurality of hydroxyl substituents and a fatty acid amide having a plurality of hydroxyl substituents. Also described herein are scratch-off structures and methods for producing them.

Disclosed herein is an electrostatic ink composition comprising a component selected from a fatty acid ester having a plurality of hydroxyl substituents and a fatty acid amide having a plurality of hydroxyl substituents. Also described herein are scratch-off structures and methods for producing them.

Disclosed herein is an electrostatic ink composition comprising a component selected from a fatty acid ester having a plurality of hydroxyl substituents and a fatty acid amide having a plurality of hydroxyl substituents. Also described herein are scratch-off structures and methods for producing them.

A brushless motor includes: a rotor including a magnet with polarization directions arranged so as to be alternatingly inverted along a circumferential direction centered about a rotation shaft, the rotor being attached to a housing so as to be capable of rotating with the rotation shaft serving as the center of rotation; a stator including multiple coils arranged along the circumferential direction centered about the rotation shaft of the rotor so as to oppose the magnet, the stator causing the rotor to rotate due to interaction between a magnetic field generated by the magnet and magnetic fields generated by the coils due to current flowing in the coils; at least one rotation angle sensor that detects the rotation angle of the rotor; and a protection portion provided at a location farther from the rotation shaft than each rotation angle sensor and formed by a grounded conductor.

A shuffling machine with an antistatic mechanism has a central accommodation trough, a left accommodation trough, a right accommodation trough, and a card distribution space. The shuffling machine includes a movable board disposed over the central, left and right accommodation troughs at a predetermined height. The movable board includes a card distribution plate located in the card distribution space to distribute playing cards in the central trough to the left or right accommodation trough. One side of the card distribution plate has a first stopper, and another side has a second stopper. When the card distribution plate distributes the playing cards to the left accommodation trough, the second stopper is to separate the central trough from the right accommodation trough. When the card distribution plate distributes the playing cards to the right accommodation trough, the first stopper is to separate the central trough from the left accommodation trough.

An anti-static playing card is a plastic playing card having a front surface and a back surface, wherein each of the surfaces has a first anti-static paint layer in which a surfactant and a coloring agent are added for displaying a suit and a number on the front surface and displaying a pattern on the back surface, and each of the surfaces has a transparent second anti-static paint layer that has a surfactant added therein and is coated over the first anti-static paint layer, so that the anti-static playing card is prevented from accumulation of static electricity.