Ribbon cassette for typewriter with tension producing locking de

Details Ribbon cassette for typewriter with tension producing locking de Ribbon cassette for typewriter with tension producing locking de

1981-09-09

1983-01-18

Eickholt, E. H.

Typewriting machines

Including interposed inking device for record-medium

Endless ribbon or cartridge therefor

B41J 3200

Patent

active

043689922

ABSTRACT:
A cassette comprises a casing (1) containing a delivery spool (2) and a receiving spool (4) co-operating with drive means. The ribbon (3) passes from the delivery spool (2) to the receiving spool (4) outside the casing (1). The delivery spool (2) is secured to a toothed wheel (20) which co-operates with a catch (23) of a part (21) biased by a spring (28). This part (21) in the form of a T, is pivotally mounted on the casing (1) at one of the upper ends of the arm or crosspiece of the T and carries return roller (24) at the other end of this arm around which roller the ribbon (3) is diverted in a manner to form a loop. The length of the upper arm of the part (21) is substantially twice as large as the distance separating the catch (23) of the pivot point of the part (21). This arrangement ensures a correct tension of the ribbon ( 3) at all times.

REFERENCES:
patent: 2755905 (1956-07-01), Segui
patent: 2904157 (1959-09-01), Smith
patent: 3311316 (1967-03-01), Williams
patent: 3995731 (1976-12-01), Miller et al.
patent: 4156573 (1979-05-01), Anderson et al.
patent: 4175877 (1979-11-01), Randolph
patent: 4269520 (1981-05-01), Gabler
patent: 4317636 (1982-03-01), Hume

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