A magnetic printer for newspapers CTS

This paper describes a magnetic printer which was developed as a proofing printer for newspaper CTS (computerized type setting system). In order to produce a number of copies of the proof efficiently, this printer is intended to have copying function. In recording latent image, the recording drum is rotated at high speed of 4,000 r.p.m.. The recording head is carried along the axial direction of the drum. After the latent image of one page is completed on the drum, the processes of forming visual image are repeated with the drum rotation of 60 r.p.m.. A number of copies are produced at the rate of 60 copies/minute. A newly devised multiple-channel head is employed in the printer. The track width of the preceding channels are wider than those of the succeeding channels. The latent images recorded by the preceding channels are sequentially overlapped by the succeeding channels. The recording resolution of 454 dots per inch was achieved. In this paper the overview of the printer structure and operation is described, and the detail of the multiple channel head is discussed.