Ribbon shield for printer

Details Ribbon shield for printer Ribbon shield for printer

1979-10-19

1981-08-25

Eickholt, E. H.

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400124, B41J 3332

Patent

active

042856043

ABSTRACT:
A user replaceable printer ribbon shield of simple design is provided for use in high speed matrix printers utilizing continuous forms. The shield is detachably mounted. During printing, the shield prevents outfolds in the forms from catching on the ribbon and prevents ribbon ink from migrating to the forms. It moves with the platen slightly away from the matrix print head when the machine is idle for at least a preset period of time. This causes the ribbon to move away from the ends of the print wires in the matrix print head to keep print wire lubricatng oil from migrating to the ribbon.

REFERENCES:
patent: 383480 (1888-05-01), Osborne
patent: 2409237 (1946-10-01), Banks
patent: 2788111 (1957-04-01), Spiegel
patent: 3017981 (1962-01-01), Keith
patent: 3047121 (1962-07-01), Roggenstein
patent: 3941231 (1976-03-01), Matuck et al.
patent: 4165188 (1979-08-01), Rempel
"Angled Ribbon Guide", IBM Tech. Discl. Bulletin, vol. 19, No. 10, Mar. 1977, pp. 3817-3818.
"Typing Shield", IBM Tech. Discl. Bulletin, vol. 5, No. 11, Apr. 1963, pp. 30-31.
"Side of Forms, End of Forms, & Forms Jam-Detection Scheme for Printers", IBM Tech. Discl. Bulletin, vol. 20, No. 11A, Apr. 1978, pp. 4266-4269.
"Ribbon Shield with Integral Aligner & Turning Stanchions", IBM Tech. Discl. Bulletin, vol. 22, No. 8A, Jan. 1980, pp. 3071-3072.
"Print Head to Platen & Ribbon to Print Heads Separation", IBM Tech. Discl. Bulletin, vol. 20, No. 11A, Apr. 1978, pp. 4270-4271.

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