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Ribbon Configuration for Bidirectional Printing With Resistive Ribbon

IP.com Disclosure Number: IPCOM000042287D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hafer, CH: AUTHOR [+2]

Abstract

An electrothermal printer capable of bidirectional printing is described. The printer comprises a carriage 20 which moves while printing on paper 21, and on this carriage 20 is mounted a print head 5, a ribbon cassette 1 and an auxiliary carriage 16. Ribbon cassette 1 includes a supply roll 2 of ribbon in the bottom of the cassette with an exit opening for the ribbon, and a take-up roll 3 on top of supply roll 2 with an opening for the ribbon to return to the cassette 1 after printing. The ribbon leaves the cassette 1, passes around idler roll 4, around print head 5, idler rolls 6 and 7, to ribbon turn-around 8, and returns on the same path but different level to drive roll 9 and to the take-up reel 3.

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Ribbon Configuration for Bidirectional Printing With Resistive Ribbon

An electrothermal printer capable of bidirectional printing is described. The printer comprises a carriage 20 which moves while printing on paper 21, and on this carriage 20 is mounted a print head 5, a ribbon cassette 1 and an auxiliary carriage 16. Ribbon cassette 1 includes a supply roll 2 of ribbon in the bottom of the cassette with an exit opening for the ribbon, and a take-up roll 3 on top of supply roll 2 with an opening for the ribbon to return to the cassette 1 after printing. The ribbon leaves the cassette 1, passes around idler roll 4, around print head 5, idler rolls 6 and 7, to ribbon turn-around 8, and returns on the same path but different level to drive roll 9 and to the take-up reel 3. To drive the ribbon a flat, endless, perforated belt 10 is located so that it passes over the drive motor 11 (which is not mounted on the carriage 20), auxiliary carriage drive 12, one- way clutch 13, and one-way clutch 14. All of these drive sprockets are the same size including the ribbon drive roll 9. The auxiliary carriage drive sprocket 12 drives a gear 15 which is one half the diameter of the sprocket. This gear, in turn, engages a rack which drives the ribbon turn-around 8 one-half the distance the ribbon travels. The flat belt 10 also drives the two one-way clutches 13, 14, but only one clutch will drive at a time, depending on the direction of the flat belt 10. With this arrangement the...