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Endless Ribbon Feed

IP.com Disclosure Number: IPCOM000094753D
Original Publication Date: 1965-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Burgers, G: AUTHOR [+3]

Abstract

The in ribbon feed in drawing 1 uses an endless ribbon. The bulk of this is wound in many turns around two bobbins A and B. Bobbin A is driven and has a high-friction surface which faces along the innermost layer of ribbon. Other turns of ribbon are moved by frictional forces between adjacent turns. The innermost layer, travelling leftward is taken off by ribbon guide C as shown in drawing 2.

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Endless Ribbon Feed

The in ribbon feed in drawing 1 uses an endless ribbon.

The bulk of this is wound in many turns around two bobbins A and B. Bobbin A is driven and has a high-friction surface which faces along the innermost layer of ribbon. Other turns of ribbon are moved by frictional forces between adjacent turns. The innermost layer, travelling leftward is taken off by ribbon guide C as shown in drawing 2.

Guide C directs the ribbon upward and then transversely toward a similar guide D. This is positioned on the outside of the manifold of ribbon turns. The ribbon travels along guide D, first downward and then to the right where it rounds guide pin E. The original leftward motion having been restored, the ribbon travels along with the outermost supply turn, rounds B, and enters the utilization loop, between points F and H. Here, the ribbon is guided by lift guides, not shown, located at points G1 and G2. Between is located the printing station where the ribbon is impacted by the type.

Due to the increasing radius, the outer supply turns tend to have more displacement than the inner turns. However, the length of ribbon pulled in at H cannot be more than the length of ribbon released via CDEF. This causes the different turns to slip one over the other and also causes a constant tension in the loop FH. The bobbins A and D with the bulk of ribbon supply and the guides C, D, E, are enclosed in a cartridge, not shown, having slots at F and H.

Another arrangement i...