Browse Prior Art Database

Cartridge Ribbon Restraint System

IP.com Disclosure Number: IPCOM000041120D
Original Publication Date: 1987-Aug-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

In cartridge ribbon restraint systems, a single strand of ribbon is drawn out of the cartridge and passes in front of a print head at a prescribed tension to provide for a proper transfer of ink from the ribbon to the paper without smudging. The tension on the ribbon must also allow for ribbon control functions such as shifting the ribbon vertically to access different color bands in a multicolor ribbon. High tension or non-uniform tension can cause a failure in ribbon movement.

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Cartridge Ribbon Restraint System

In cartridge ribbon restraint systems, a single strand of ribbon is drawn out of the cartridge and passes in front of a print head at a prescribed tension to provide for a proper transfer of ink from the ribbon to the paper without smudging. The tension on the ribbon must also allow for ribbon control functions such as shifting the ribbon vertically to access different color bands in a multicolor ribbon. High tension or non-uniform tension can cause a failure in ribbon movement.

The Figure illustrates a ribbon cartridge including a ribbon restraint of the present invention. The cartridge 1 defines a ribbon reservoir into which the ribbon 2 is packed in a randomly folded manner. The ribbon exits the cartridge through a passage defined by an interior wall 3 and an exterior wall 4 that extend to a position alongside the print head 5. The ribbon passes in front of the print head to the opposite end of the cartridge where it enters a second passageway 6 leading to a driven roller 7. The driven roller is powered by the printer and may work in conjunction with an idler roller that is pressed against the driven roller by a spring.

The ribbon restraint 10 comprises two triangularly shaped bosses extending upwardly from the floor of the ribbon cartridge and downwardly from the roof of the ribbon cartridge, one directly above the other. The space between the upper and lower bosses is open. The bosses occupy only a portion of the opening lea...