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Laser Method of Producing Multicolored Nylon Typewriter Ribbon

IP.com Disclosure Number: IPCOM000042547D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Fursik, N: AUTHOR [+7]

Abstract

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.

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Laser Method of Producing Multicolored Nylon Typewriter Ribbon

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. The total surface area for the wicking action will then be greatly reduced. The width of the melted area can be made very narrow. For example, if the ribbon is 100 mm thick, and a 10 mm CO2 laser with f/3 focusing optics is used, a 30 mm fused track through the entire 100 m thick tape would be left. Cutting and melting plastic and nylon with a CO2 laser is well- known in the art. Narrower stripes could be fused with shorter wavelength lasers (such as Nd:YAG at 1.06 m or argon ion lasers at 0.51 m), but at greater expense and with less well controlled light absorption characteristics. A second technique includes coating the ribbon with an organic mat...