# US 4,391,541 A · Mosaic printer and ribbon guide therefor

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- Number: US 4,391,541 A
- Document ID: US4391541A
- Status: Granted
- Kind: A
- Application number: 06/323,677
- Filed: 1981-11-23
- Granted: 1983-07-05
- Earliest claimed: 1981-11-23
- Assignees: International Telephone and Telegraph Corporation
- Inventors: Robert E. Einem
- Web page: https://patentgrep.com/patent/US4391541A

## CPC

- B41J 35/06: stationary
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A plastic ribbon guide to fit on a print head of a mosaic printer. The printer is a ticket printer which holds the ribbon in a stable position adjacent the tray which also acts as an anvil. The ribbon is kept taut. The ribbon guide has a shape to hold the ribbon in a positive manner.

## Claims

### Claim 1

A printer comprising: a base having a paper support; an inked ribbon approximately parallel to said paper support; means to support each end of said inked ribbon lengthwise thereof over said paper support in a manner to permit a piece of paper to be inserted between said inked ribbon and said paper support; a print head having one end with a plurality of styli with ends in a line extending normal to the lengthwise direction of said inked ribbon thereacross and with axes normal to said inked ribbon; means to guide said one end of said print head over said inked ribbon; and a ribbon guide fixed relative to said one print head end, said ribbon guide including two parallel wings, pairs of first and second projections fixed to, at opposite ends and extending between said wings, said first pair of projections defining a central longitudinal slot for threading said inked ribbon therethrough, said second pair of projections defining another central longitudinal slot for threading said inked ribbon therethrough, first and second members extending transversely of and connecting said wings at longitudinally spaced positions defining a first transverse slot therebetween, said print head end being fixed within said first transverse slot presenting said styli ends approximately flush to the surfaces of said first and second members closest to said inked ribbon, said first and second pairs of projections being respectively spaced longitudinally from said first and second members and defining respective second and third transverse slots on opposite sides of said first transverse slot and parallel thereto, said first and second members having first and second lower surfaces inclined downwardly toward said one print head end within said first slot, said inked ribbon extending over said first pair of projections, downwardly through said second transverse slot, flush to and over said first inclined surface, said print head end, said second inclined surface, upwardly through said third transverse slot and over the top of said second pair of projections.

### Claim 2 (depends on 1)

A printer as claimed in claim 1, wherein means are provided to move said inked ribbon, said print head and said styli synchronously.

### Claim 3 (depends on 2)

A printer as claimed in claim 2, wherein said end of said print head has longitudinal notches, said wings having further projections fitting in said notches.

### Claim 4 (depends on 1)

A printer as claimed in claim 1, wherein said end of said print head has longitudinal notches, said wings having further projections fitting in said notches.