Patent · US Expired

Re-inking and ventilation control for inked ribbon cassette

US4153378A · kind A · utility

17Cited by

7References

4Claims

0Family size

Assignee

Franz Buttner AG · CH

Inventors

Herbert Scherrer · Pfäffikon, CH
Ernst Bopp · Zürich, CH
Ennio Cecchetto · Zürich, CH

Key dates

Filing date	Mar 7, 1977
Grant date	May 8, 1979
Priority date	—
Expiry date	Mar 7, 1997

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J31/16
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a cassette for use in connection with a device for printing characters on a surface from the stroke impact of a dye impregnated ribbon such as a typewriter, and features a housing defining an aperture for ventilating a chamber defined therein, re-impregnating means disposed in the chamber and operable for re-impregnating the ribbon dye, and locking means removably engaged with the aperture and operable to activate the re-impregnating means during disengagement of the locking means with the aperture.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.