MANUFACTURE OF TAPE GUIDE AND TAPE CASSETTE USING THE TAPE GUIDE

摘要

PURPOSE:To inexpensively produce the tape guide of high performance by pressing plural knife edges provided at a tool to a metallic cylinder part circumferential face forcibly, forming many channels parallel to a tape traveling direction and forming the protrusion of a section approximately circular shape between the adjoining channels. CONSTITUTION:A partial or complete cylinder to have the cylinder face of a range connecting slidably with a tape at least is formed with rolling the sheet metal of non-magnetic stainless material and so on, plural knife edges provided at a tool are pressed forcibly to the part connecting slidably with the tape at least of a cylinder part and are plastic-deformed, many actually parallel channels extending in the traveling direction of the tape are formed on a cylinder part circumferential face, and many protrusions 7a of which section shape is approximately circular shape are formed between the channels. Since the protrusions 7a have gentle curvature and extend in the traveling direction of the tape, when a contact area with the tape decreases and friction coefficient with the tape practices friction repeatedly, they do not become high. Thus, a tape guide 7 of high performance can be manufactured easily and inexpensively.