Laser Method of Producing Multicolored Nylon Typewriter Ribbon
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
When nylon impression fabric ribbons are coated with several colors, many of the inks tend to "wick" into the wrong areas causing color mixing. In the prior art, a solution to this problem was attempted by coating a thick stripe of materials (which inhibits the wicking action) between the stripes of different colored inks. In this article, a method of inhibiting ink flow from one part of the ribbon to the other is described which is less expensive then applying some material to the ribbon, and which uses up less space on the ribbon and, consequently, leaves more space to carry the colored inks. More particularly, the technique includes the focusing of a CW laser on the ribbon with sufficient intensity to melt the nylon filaments so that they fuse together.