INK RIBBON WINDING MECHANISM AND PRINTER DEVICE

WIPO Patent Application WO/2004/060684

A1

An ink ribbon winding mechanism comprises a planetary gear mechanism consisting of a sun gear rotating forwardly and backwardly according to the movement of a carrier, a holder rotatably installed in the sun gear and having a pressing section for pressing the sun gear, a first planetary gear installed in the holder and meshing with the sun gear, and a second planetary gear installed in the holder and meshing with the sun gear, a winding means (winding gear, intermediate gear) with which either the first planetary gear or the second planetary gear of the planetary gear mechanism meshes and which is driven in the ink ribbon winding direction, and a holder lock means for fixing the holder at a neutral position where the first and second planetary gears do not mesh with the winding means. Thus, during the non-printing movement of the carrier, the holder can be fixed at the neutral position where the first and second planetary gears do not mesh with the winding means, by the holder lock means, so that even if the ink ribbon cassette is of the ink replenishing type in which ink ribbon winding is not effected, over-replenishment of ink to the ink ribbon does not occur, ensuring that the print density is constant.

JP3603032	Printer control method and printer
JPH06155871	DRIVING METHOD OF INK RIBBON

UMENO HIDEYUKI

PCT/JP2003/017003

July 22, 2004

December 26, 2003

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FUJITSU FRONTECH LTD (JP)

B41J33/388; B41J33/14; B41J33/386; B41J33/40; (IPC1-7): B41J33/388; B41J23/02

JPH01178482A	1989-07-14
JPH07304226A	1995-11-21
JPH082079A	1996-01-09
JPS6131283A	1986-02-13
JPS6166682A	1986-04-05
JPH0726146U	1995-05-16

Osuga, Yoshiyuki (Nibancho Bldg. 8-20, Nibanch, Chiyoda-ku Tokyo, JP)

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