Typewriting machines – Platen or platen-moving mechanism – For movement of platen other than for line-spacing
Patent
1986-09-10
1988-09-20
Sewell, Paul T.
Typewriting machines
Platen or platen-moving mechanism
For movement of platen other than for line-spacing
4006131, 400656, B41J 1108
Patent
active
047721464
ABSTRACT:
A recording apparatus preferably usable for desk-set type electronic calculator, computer, word processor, electronic typewriter or the like of the type having a platen detachably incorporated therein. The platen is operatively connected to an upper case. When it is to be removed from the apparatus, the case is first removed and the platen is then displaced away from the operative position by a turning movement in accordance with a removing movement of the case. Recording paper can be placed on the lower guide surface which is exposed to the outside. On completion of placing of the recording paper the case is closed together with the platen by way of the reverse steps until the platen assumes the operative position. To assure that the recording paper is stably held on the lower guide surface even after the platen is displaced away from the operative position, the base board is formed with an opposing pair of semispherical projections on the inner side walls. The platen may be raised up away from the operative position in the vertical direction instead of a turning movement. To inhibit the recording paper from becoming contaminated with ink, a contamination inhibitive plate is interposed between the platen and the printing belt or ring. It is preferable that the contamination inhibitive plate is raised up under the effect of resilient of coil springs at the same time when the platen is displaced away from the operative position.
REFERENCES:
patent: 3905462 (1975-09-01), Nowak
patent: 3995730 (1976-12-01), Kwan
patent: 4632585 (1986-12-01), Oyamatsu
Mori Shigeki
Saito Yasuhide
Sekine Kazumi
Shinohara Hayato
Tsukada Isao
Canon Kabushiki Kaisha
Sewell Paul T.
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