Patent ID: 7258501
Filing Date: 2007-08-21
Classification: B41J

Abstract:
1. An ink ribbon cartridge, comprising: a frame; a first supply shaft connecting member, the first supply shaft connecting member rotatably connecting a first end of a supply shaft to the frame, the first supply shaft connecting member being attachable and detachable to the first end of the supply shaft, and the first supply shaft connecting member being undetachable relative to the frame such that when the supply shaft is removed from the frame, the first supply shaft connecting member remains secured to the frame; a second supply shaft connecting member, the second supply shaft connecting member rotatably connecting a second end of the supply shaft to the frame and the second supply shaft connecting member being attachable and detachable to the second end of the supply shaft; a first take-up shaft connecting member, the first take-up shaft connecting member rotatably connecting a first end of the take-up shaft to the frame, the first take-up shaft connecting member being attachable and detachable to the first end of the take-up shaft, and the first take-up shaft connecting member being undetachable relative to the frame such that when the take-up shaft is removed from the frame, the first take-up shaft connecting member remains secured to the frame; and a second take-up shaft connecting member, the second take-up shaft connecting member rotatably connecting a second end of the take-up shaft to the frame and the second take-up shaft connecting member being attachable and detachable to the second end of the take-up shaft, wherein the first supply shaft connecting member includes a back tension applying mechanism for applying a back tension to the supply shaft, and the back tension applying mechanism applies the back tension based on a resistance generated between two surfaces rubbing against each other; wherein the second supply shaft connecting member and the second take-up shaft connecting member are attachable and detachable to the frame, and wherein the first take-up shaft connecting member includes a gear member, wherein the back tension applying mechanism includes a spring, the spring being within a spool portion of the supply shaft, the spring being between the first supply shaft connecting member and the frame.