Ribbon system and printing apparatus and method of operation thereof.

摘要

A ribbon system and printing apparatus include a typing ribbon in which the substrate material of the ribbon is stretched or deformed in operation upon impact by a hammer. Shaped means (201-205) are provided in the path of the ribbon for preferentially stretching or deforming a portion of the ribbon to a degree such that its elastic limit is exceeded, causing the ribbon to become crown-shaped and thereby facilitating re-spooling. The shaped means (201-205) may be mounted at any suitable location in the path of the ribbon, for example on the ribbon guidepost in a ribbon cartridge or in a boss formed in the cartridge.