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Ribbon Oscillating Guide Mechanism

IP.com Disclosure Number: IPCOM000080017D
Original Publication Date: 1973-Oct-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Kirksey, JR: AUTHOR [+2]

Abstract

Fig. 1 illustrates an edge view of an inked ribbon 1 which is entrained about two ribbon guides or spools 2, to pass in front of the nose of a wire matrix print head 3 to effect marking on the paper or other document, not shown. Fig. 2 illustrates the problem present with most twisted loop inked ribbons. The ribbon 1 will have two worn areas 4 and 5, which occur because the wire matrix print head continually batters only a narrow area of the ribbon. The presence of two tracks of wear, 4 and 5, is explained by the fact that a twist is put into the loop to distribute the wear onto both sides, thus producing a dual track after two complete revolutions of the tape in an endless loop.

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Ribbon Oscillating Guide Mechanism

Fig. 1 illustrates an edge view of an inked ribbon 1 which is entrained about two ribbon guides or spools 2, to pass in front of the nose of a wire matrix print head 3 to effect marking on the paper or other document, not shown. Fig. 2 illustrates the problem present with most twisted loop inked ribbons. The ribbon 1 will have two worn areas 4 and 5, which occur because the wire matrix print head continually batters only a narrow area of the ribbon. The presence of two tracks of wear, 4 and 5, is explained by the fact that a twist is put into the loop to distribute the wear onto both sides, thus producing a dual track after two complete revolutions of the tape in an endless loop.

Fig. 3 illustrates a side view of the mechanism shown in Fig. 2 so that pins 6 which are held in the wall of each spool 2 can be seen. Pins 6 engage cam surfaces on the circumference of cam studs 7 and follow the grooved surface 8 on each stud. The spools 2 are driven by having a high friction surface 9 which bears against ribbon 1, which is driven by drive rollers, not shown. As the spools 2 rotate, pins 6 follow the curved track 8 and cause axial reciprocation on the studs 7, as illustrated by the arrows in Fig. 3.

This action distributes the wear due to the impact of the wire matrix print head over a wider area, as is shown in Fig. 4. Two wear tracks are still produced, but they are distributed over the wider portion of the surface of the ribbon, the...