The bichromal element spinner apparatus provides the forming of
substantially spherical bichromal elements from pigmented molten, but
hardenable material compounds which are delivered centrally to a spinning
webbed disk through opposite ends of hollow shaft that also spins with
the disk. The molten materials are injected into cavities formed between
the shaft and the web portions of the disk such that the molten materials
are spun outwardly on the opposite surfaces of the disk towards the tip
of the disk, where the hardenable materials adhere to each other without
mixing, thereby spinning off to bichromal elements. Shrouds attached to
the shaft and having no intervening support members over the spinning
disk provide quiescent air mass between the disk and the shrouds so as to
yield bichromal elements with substantial hemispherical integrity.