Browse Prior Art Database

Printer Ribbon Cassette

IP.com Disclosure Number: IPCOM000087325D
Original Publication Date: 1977-Jan-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Brumbaugh, PA: AUTHOR [+3]

Abstract

This cassette for an endless ribbon of a printer comprises a container, having a bottom 3, side walls 5 and 7 and a top 9, of generally rectangular configuration. Ribbon is pulled from an exit port 11 along a first extending arm 13 through an unsupported stretch which passes the printing position when the cartridge is inserted in the printer, and along a second extending arm 15, by a pair of feed rolls 17 and 19 enclosed in the container. The feed rolls have meshing teeth portions separated by recesses in which stripping elements are positioned. The ribbon is drawn between the two feed rolls and is stripped therefrom, and enters the storage chamber in random folds, in the volume existing between the entrance port and the exit port of the chamber.

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Printer Ribbon Cassette

This cassette for an endless ribbon of a printer comprises a container, having a bottom 3, side walls 5 and 7 and a top 9, of generally rectangular configuration. Ribbon is pulled from an exit port 11 along a first extending arm 13 through an unsupported stretch which passes the printing position when the cartridge is inserted in the printer, and along a second extending arm 15, by a pair of feed rolls 17 and 19 enclosed in the container. The feed rolls have meshing teeth portions separated by recesses in which stripping elements are positioned. The ribbon is drawn between the two feed rolls and is stripped therefrom, and enters the storage chamber in random folds, in the volume existing between the entrance port and the exit port of the chamber.

To provide improved packing of the ribbon, the side walls of the chamber are tapered outwardly from the entrance end to the exit end. A downwardly extending rib 21 is provided on the underside of the top of the container extending parallel to and inward from the side walls of the chamber. At the exit end of the chamber, the rib is continued across the top to provide a U-shaped configuration, the transverse portion 23 of the rib acting as a dam against which the randomly folding ribbon will be packed as a result of the entrance of further ribbon at the entrance port.

The exit port 11 is located at the rearmost side of the container, thereby providing the longest length of ribbon possible from the e...