Polychrome printing platen of a printer

Details Polychrome printing platen of a printer Polychrome printing platen of a printer

1984-05-21

1986-08-12

Burr, Edgar S.

Typewriting machines

Platen or platen-moving mechanism

Cylindrical platen

400124, 400470, 400657, B41J 1104, B41J 11057

Patent

active

046053280

ABSTRACT:
A polychrome printing platen of a printer having a platen shaft comprises an axially elongated platen body rotatably mounted on the platen shaft and having a plurality of grooves formed therein to extend in the axial direction and spaced from each other in the circumferential direction, and a plurality of permanent magnets each arranged in each of the grooves. A plurality of axially elongated elements having inks of different colors impregnated therein are attached to the platen body. Each ink impregnated element has an upper face and a lower face and has a magnetizable plate secured to the lower face thereof. All ink impregnated elements are detachably attached to the platen body by the permanent magnets which attract the magnetizable plates.

REFERENCES:
patent: 618252 (1899-01-01), Meyrueis
patent: 1357341 (1920-11-01), Novotny
patent: 1377506 (1921-05-01), Novotny
patent: 2346163 (1944-04-01), Hiles
patent: 3039389 (1962-06-01), Meese et al.
patent: 3509819 (1970-05-01), Conole
patent: 3919937 (1975-11-01), Kostal
patent: 4386861 (1983-06-01), Kurihara et al.
IBM Tech. Disc. Bulletin, "Color Wheel with Inked Platens", Humphreys, vol. 25, No. 4, Sep. 1982, p. 2193.

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