Abstract: An information carrier such as a push-button switch consists of a silicone elastomer. The information carrier has an a label-carrying surface in which there is embedded a printing ink having a vulcanizing mechanism similar to that of the silicone elastomer. The ink and silicone elastomer are vulcanized to form the ink into a pattern on the label-carrying surface. The label-carrying surface having the pattern embedded therein constitutes a non-glossy surface of a predetermined roughness. Also disclosed are a method and apparatus for manufacturing the information carrier by printing the printing ink on a transfer plate, which has a roughness of several microns, followed by half vulcanization to embed a pattern which is manifested by the printing ink into the label-carrying surface of the information carrier.

Abstract: Disclosed is a pushbutton-type switch such as used on the keyboard of a small-size electronic computer. The switch includes a main member carrying a movable contact and one or more projections or posts of lesser height than the movable contact. Upon application of finger pressure to the main member, the movable contact is brought into uniform contact with a fixed contact therebelow without chattering, by virtue of the supporting action of the posts.