DE3420084A1 - RIBBON CASSETTE - Google Patents

Description

description

The invention relates to an ink ribbon cartridge for use in a printer or typewriter, and more particularly a ribbon cassette that is equipped with a color cartridge.

In conventional ribbon cassettes with color cartridges, a wick of the color cartridge touches a transfer roller, and the ink ribbon is in contact with the transfer roller to be continuously impregnated with ink. if such an ink ribbon cassette stops printing and the transfer roller stops rotating, Ink collects in the portion of contact between the ribbon and transfer roller. Then when printing starts again, an excess of ink is fed to the ribbon, which darkens the printed characters and the print becomes a non-uniform color density.

The object of the invention is to create an ink ribbon cassette in which the disadvantage mentioned is avoided uneven color density of the print is avoided, and a clear print can be obtained.

According to the invention, this object is achieved by an ink ribbon cassette having the features of the patent claim.

The invention is explained in more detail below using an exemplary embodiment with reference to the drawings. Show it:

Fig. 1 is a vertical sectional view of an essential part of an embodiment the ribbon cassette according to the invention, 35

2/3

Figure 2 is a plan view of an ink ribbon cassette

of Fig. 1 with the upper cover removed and

Fig. 3 is an enlarged plan view of the first

Transfer roller in the ribbon cassette of Fig. 1.

As shown in FIGS. 1 and 2, an ink cartridge 2 is inserted into an ink ribbon cassette 1 and due to the Effect of a leaf spring 3 can be removed from the ribbon cassette 1. In the color cartridge 2 there are color contained Material 4 and a wick 5 included. One end of the wick 5 protrudes outward. A first transfer roller 8 and a second transfer roller 9 are positioned between an upper housing part 6 and a lower housing part 7 the ribbon cassette 1 rotatably held. The first transfer roller 8 consists, for example, of porous rubber, that can absorb a lot of color. The second transfer roller 9 is made of synthetic resin such as polyacetals and is provided with fine grooves 9a on its circumferential surface, the lie in the axial direction, as shown in FIG. A shaft tO is rotated by a motor (not shown) and abuts the second transfer roller 9. A pressure roller 11 presses the ink ribbon 12 into contact with the second transfer roller 9. The rotational movement of the shaft 10 is transmitted to the second transfer roller 9 and the first Transfer roller 8 is transferred and the ribbon 12 is transported, taking color from the second transfer roller receives.

Since the second transfer roller 9 is provided with the grooves 9a, it receives a constant amount of ink and does not receive any excess color. Therefore, the ink is transferred to the ink ribbon 12 in a uniform manner.

- blank page -

Claims (1)

BLUMBACH · WESER -BERGEN. KRAMER 3 A? O O 8 A ZWIRNER HOFFMANN EUROPEAN PATENT ATTORNEYS IN MUNICH R. KRAMER DIPL-ING. PATENT ADVOCATE W. WESER DIPL-PHYS. DR. RER. NAT. PATENT ADVOCATE E. HOFFMANN DIPL-ING. PATENT ADVOCATE IN WIESBADEN P.O. BLUMBACH DIPL.-ING. PATENT ADVOCATE P. BERGEN PROFESSOR DR. 3UR. DIPL-ING. G. ZWIRNER DIPL-ING. DIPL-W.-ING. PATENT ADVOCATE SEIKOSHA CO., LTD. 84/8749 Ho / mü to T5 RIBBON CASSETTE Claim Ink ribbon cassette comprising an ink cartridge (2) equipped with a wick (5), an ink ribbon (12), a first transfer roller (8) which is in contact with the wick (5), a second transfer roller (9) which is in contact with the first transfer roller (8) and has axially extending grooves (9a) in its circumferential surface has and a pressure roller (11), which the ribbon (12) with presses the second transfer roller (9) into contact. Wheel «dc * lt» g · 45 8000 Munich 60 Τ · Ι · Ιοη (0β9> 883603; Μ5604 Τ · Ι · χ 5212313 Talagram · Patantconiult 8onnanberg «r Strafl · 43 6200 Wlaibadan Τ · ι · (οη (06121) 562943/561998 Τ · ι · χ 4186237 Taiagramm · Patantconsult tmo \ 8MüA1B Attention Petitnlconiult