Apparatus for selectively reversing paper in a printer

Details Apparatus for selectively reversing paper in a printer Apparatus for selectively reversing paper in a printer

1999-07-22

2000-11-21

Hilten, John S.

Typewriting machines

For typing on reverse surface of record-medium

400187, 271 65, 271186, B41J 360

Patent

active

061493244

ABSTRACT:
A paper reversing apparatus of a printer includes a printing medium exhaust path which is connected between an outlet of a printing unit and an outside of a printer main body to guide exhaustion of a printing medium. A guide unit selectively guides a leading edge of the printing medium passing the printing unit to enter one of the printing medium exhaust path or a reversing path, which is branched from the printing medium exhaust path. The printing medium exhausted to the reversing path is reversed and re-supplied to an inlet side of the printing unit. A paper resupply unit is installed between an inlet of the entrance path and an outlet of the reversing path, and is capable of pivoting. Paper detection sensors are installed at the inlet of the entrance path for detecting a type of printing medium entering the entrance path. Thus, when a printing medium in the form of a transparent overhead projector sheet enters into the entrance path, the sheet is detected by the sensors and only one side of the sheet is printed on before the sheet is exhausted out of the printer main body, without unnecessarily applying developer to both sides of the transparent sheet.

REFERENCES:
patent: 4978980 (1990-12-01), Noguchi et al.
patent: 5133541 (1992-07-01), Murasaki et al.
patent: 5176375 (1993-01-01), Kitahara
patent: 5448348 (1995-09-01), Azeta
patent: 5690325 (1997-11-01), Morimoto

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