Abstract: A method of preventing Moire patterns in a halftone image includes creating a digital screen including a collection of cells having pixels with threshold values according to a spot function, and dithering the threshold values corresponding with the endtones while not dithering the midtone gray values. Preferably, the amount of dither increases with the difference between the threshold value of the pixels from the midtones. The growth of the spot due to increasing gray values is controlled such that all cells grow at the same rate at the endtone gray values, and some cells grow at different rates at the midtone gray values.

Abstract: The improved pill container has an external shape simulating a fountain pen and includes the usual clip for securing the container within a pocket of a user. Construction-wise, the container includes a center section and two end sections. Each of the end sections is hollow and adapted to contain pills or medication of a certain type, and each end section has an open end which fits telescopically over a portion of the center section so that the end section is rotatably mounted. Cooperating projection and recess means are provided to yieldably retain each end section to the center section and to provide for step-by-step rotation of the end section. Indicating means are provided to visually indicate the rotated position of each end section. The center section blocks flow of pills from one end section to the other.