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Self Adjusting Ribbon Guide And Tensioner

IP.com Disclosure Number: IPCOM000041052D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hedrick, DR: AUTHOR [+2]

Abstract

The print system shown in the Figures is for a self-adjusting ribbon guide roller 1 and a ribbon tensioner 2. Referring to Figure 1, the ribbon is fed from a ribbon cartridge base 3 having flared out ribbon arms 4. A rod 5 parallel to the surface of the ribbon is disposed at the widened end of the arms 4. A flanged roller 1 is free to move axially on and rotate around the rod. The ribbon comes from the cartridge base 3, passes over the roller 1, and is then fed through a ribbon shield 6 located in front of the print head 7.

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Self Adjusting Ribbon Guide And Tensioner

The print system shown in the Figures is for a self-adjusting ribbon guide roller 1 and a ribbon tensioner 2. Referring to Figure 1, the ribbon is fed from a ribbon cartridge base 3 having flared out ribbon arms 4. A rod 5 parallel to the surface of the ribbon is disposed at the widened end of the arms 4. A flanged roller 1 is free to move axially on and rotate around the rod. The ribbon comes from the cartridge base 3, passes over the roller 1, and is then fed through a ribbon shield 6 located in front of the print head 7.

A ribbon tensioner is also mounted on the rod 5. It includes a pair of posts 8, 9 parallel to the rod and a spring finger 10 extending from one post (See Figure
2). The spring finger biases the ribbon against the central sleeve 1A of the flanged roller 1.

The ribbon exits the cartridge base and runs inside post 8, between finger 10 and the sleeve 1A, around the outside of the sleeve, inside post 9, and onto the ribbon shield.

The ribbon is shifted up and down by moving only the ribbon shield in the desired direction rather than the ribbon arms as is done by most print systems. When the ribbon is shifted, the rollers and guides also move in the same direction. This is done without jamming because the finger presses the ribbon against the roller sleeve. Since the ribbon does not change position relative to the rollers and guides, tension is maintained irrespective of the position of the ribbon and ribbon...