Ribbon cassette responsive to ribbon breakage

Details Ribbon cassette responsive to ribbon breakage Ribbon cassette responsive to ribbon breakage

1986-06-04

1991-07-16

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400208, B41J 3316

Patent

active

050320327

ABSTRACT:
A ribbon cassette including a casing provided with an opening for receiving a photoelectric device. In the casing is a ribbon which passes from a supply reel to a take-up reel. A guide leads the ribbon past the photoelectric device. If the ribbon breaks, the ribbon is pulled away from the photoelectric device to cause a change in received light.

REFERENCES:
patent: 3873045 (1975-03-01), Nemoto et al.
patent: 4401394 (1983-08-01), Hume et al.
patent: 4544291 (1985-10-01), Nagata et al.
Smith, "Servo Controlled . . . Takeup Device", IBM Technical Disclosure Bulletin, vol. 18, No. 12, p. 4071, 5-76.

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