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An ink ribbon for line printers is described which consists of a mechanically resistant foil and a structure, such as a fabric, for accommodating the ink, or of a unilaterally plastic-coated fabric.
English (United States)
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Ink Ribbon for Line Printers
An ink ribbon for line printers is described which consists of a mechanically
resistant foil and a structure, such as a fabric, for accommodating the ink, or of a
unilaterally plastic-coated fabric.
In line printers with hammer 2, type belt 4 and print platen 3, ink ribbons 5 are
used whose widths correspond roughly to the line lengths to be printed. The
ribbon is continuously moved transversely to the direction of movement of the
type carrier. A steel belt 4 acts as a type carrier, from whose plane the types to
be printed protrude. During printing, the protruding types dip into the fabric of the
ribbon. As a result, the fabric is highly mechanically worn by the type edges.
To prevent the ribbon from being prematurely destroyed in printers with a
high print capacity and a correspondingly high type belt speed, ink ribbon 5 with
warp threads 5a and weft threads 5b in Fig. 1 is provided on its side facing the
types with a thin layer 6 of a suitable plastic, which ensures a continuous surface
structure. The ink ribbon may also be provided on one side with a thin foil 6 of
high tensile strength, such as polyester, so that the types of belt 4 do not directly
contact the fabric of ribbon 5. According to the simplest embodiment, a foil web
and an ink ribbon web are wound up together. Foil 6 and ink ribbon 5 may be
connected by gluing or welding to prevent the foil becoming laterally displaced
relative to the ink ribbon.