Abstract: A blow-molded synthetic resin bottle that can be fully flattened and easily restored to an original shape. The bottle includes at least a line of turn is formed on the shoulder, the body, and the bottom along the entire vertical circumference. Among the sections divided by this line of turn, at least a section is used as a shell section in which at least a nearly entire body portion of this section has relatively high rigidity. The other section is a reversible section in which at least a nearly entire body portion has relatively low rigidity and is capable of being deformed by resilient reversion. The neck is disposed on the shoulder, and the reversible section can be deformed and easily concaved into the shell section for volume reduction and then can be restored to the original shape.

Abstract: There is provided a synthetic resin bottle that can be fully flattened and easily restored to its original shape. The bottle has the following configuration: At least a line of turn is formed on the shoulder, the body, and the bottom along the entire vertical circumference. Among the sections divided by this line of turn, at least a section is used as a shell section in which at least a nearly entire body portion of this section has relatively high rigidity. The other section is a reversible section in which at least a nearly entire body portion has relatively low rigidity and is capable of being deformed by resilient reversion. The neck is disposed on the shoulder, and the reversible section can be deformed and easily concaved into the shell section for volume reduction and then can be restored to the original shape.

Abstract: In making a plastic case from a molten plastic material, a molten sheet of the material is passed through a nip of a pair of molding cylinders to form a sheet of desired thickness which in turn cut into blanks. A half tone indication is formed by using a cylinder having an indication-forming part which is comprised of a mat surface and a number of elongated projections having a glossy top surface. Half tone is obtained by this simple process.

Abstract: An easy opening film package for wrapping cubic or rectangular shaped articles is prepared from a film having a printed portion containing ink and a compatible thermoplastic resin on one surface of the film. The film is wrapped around the article and heat sealed in the area of overlap of the film ends. The printed portion extends to the ends of the film and across the film over a width substantially coextensive with the width of the face of the article on which the seal is to be located.