Abstract: A packaging structure includes a head, a neck and a body. The body includes two confronting body portions of cohesive packaging material and a removable separator or insert therebetween. Upon removing the separator and pressing the two confronting body portions together, the confronting body portions are bonded together.

Abstract: A shutterless optical system for viewing motion pictures, especially suitable for an 8 mm viewer, is disclosed in which the film moves continuously in a circular path around the optical center of a lens. The motion of the film is compensated by a rotating mirror wheel--a disk or wheel of outward-facing flat mirrored surfaces. The error in one dimension ordinarily resulting from the curvature of the film path is avoided by use of a line light source and a lens between the source and the film.

Abstract: A computer-generated halftone contact screen is disclosed which consists of a rectangular array of small abutting square areas each of uniform transmittance (density), in which the transmittance (density) of the squares is described by a random variable whose distribution is controlled to give the screen a desired reproduction curve. The facsimile produced using the screen, its equivalent produced by computer-assisted means, and its representation in computer memory are disclosed.