JPH068063B2 - Ribbon cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a ribbon cartridge for wire dot printing in a computer or word processor.

Conventional technology For printers attached to computers, word processors, etc., ribbon cartridges for wire dot printing, which are equipped with ribbons that are woven cloth impregnated with ink, are used recently. Strong demand.

Problems to be Solved by the Invention However, in this wire dot printing method,
Since the ink leaches onto the surface of the ribbon facing the print head, the print head is naturally prone to stains, and high-speed printing amplifies the accumulation of stains on the print head, resulting in unclear print and other troubles.

It is an object of the present invention to provide a ribbon cartridge capable of fundamentally solving the problems such as stains on the print head and unclear print in the wire dot printing method against such a background.

Means for Solving the Problems A ribbon cartridge of the present invention is a wire dot printing cartridge provided with a woven fabric endless ribbon (1) and a ribbon feeding mechanism (2), and an aqueous dispersion of an organic fluorine-based resin. The ribbon (1) loaded with the roll (3) moistened with
The ribbon (1) is provided at a position before reaching the head so as to come into contact with the head-opposing surface.

The present invention will be described in detail below.

The organic fluorine-based resin used in the present invention,
Examples thereof include a homopolymer or copolymer of tetrafluoroethylene, a homopolymer or copolymer of vinylidene fluoride, a homopolymer or copolymer of chlorotrifluoroethylene, and particularly, a homopolymer and copolymer of tetrafluoroethylene are mixed in an appropriate ratio. It is preferable to use. Here, as a comonomer,
Examples include olefin, fluorine-containing olefin, perfluoroolefin, fluoroalkyl vinyl ether and the like.

The above organic fluororesin is used as an aqueous dispersion, but in order to prepare an aqueous dispersion having good stability over time, a paraffinic or fluorine-based solution, a fluorine-based other surfactant, a viscosity modifier, a stabilizer, etc. It is desirable to use together.

In the present invention, a roll moistened with the above-mentioned aqueous dispersion of organic fluororesin is provided so as to come into contact with the head-facing surface of an endless ribbon made of woven cloth.

Here, as the woven cloth, one woven using a nylon multifilament system or a polyester filament system is used. The endless includes both those having a seam and those having no seam (seamless).

An example of the roll installation method will be listed together with the schematic diagrams shown in FIGS. In FIGS. 1 to 4, (1) is a ribbon, (3), (3a), (3b), (3c) and (3d) are rolls, and (5) is a roll and a ribbon (1 ) Is a pressing roll or pressing piece made of an elastic member attached as necessary to ensure close contact with the), and (4) is a guide roll. Further, (H) shown by a one-dot chain line is a head.

As shown in FIG. 1, a roll (3) made of a porous material such as a sintered body, a foam or a felt-like substance is impregnated with the above aqueous dispersion in advance, and the impregnating roll (3) is Direct contact with the ribbon (1) surface.

As shown in FIG. 2, the roll (3a) impregnated with the above aqueous dispersion is brought into contact with the ribbon (1) surface through another small roll (3b).

As shown in FIG. 3, a guide roll (4) is fitted with a ring-shaped roll (3c) impregnated with the above aqueous dispersion, and the roll (3c) is brought into contact with the ribbon (1) surface.

Hollow roll made of porous material, as shown in Fig. 4
The above aqueous dispersion is sealed in the hollow part of (3d), and this roll (3d) is ribboned directly or through another small roll.
(1) A method of contacting the surface.

The rolls (3), (3a), (3b), (3c) and (3d) are usually ribbons.
It is provided so as to rotate in the forward direction with respect to the traveling direction of (1), but in some cases it may be fixed or provided with a ribbon
(1) It may be provided so as to rotate in the opposite direction to the traveling direction.

Here, examples of the material of the porous material include metals, plastics, fibers, ceramics and the like. The impregnation of these porous materials with the aqueous dispersion is preferably performed by reduced pressure impregnation rather than mere impregnation under normal pressure. This is because selective absorption in which only a specific component in the components of the aqueous dispersion is preferentially absorbed is prevented, the amount of impregnation of the aqueous dispersion is increased, and the time required for impregnation is shortened.

The contact of the roll wetted with the above aqueous dispersion with the ribbon is performed on one of both surfaces of the ribbon on the side facing the head, whereby the contact between the ribbon and the head becomes extremely smooth. At the same time, the ribbon is prevented from being stained and the ink is prevented from penetrating. The roll may be in contact with not only the head-facing surface of the ribbon but also the surface opposite to the head. In this case, the friction between the ribbon and the roll or guide roll that drives the ribbon is reduced, The ribbon travels smoothly, and the amount of electric power required to drive the ribbon is reduced.

The point of contact with the ribbon of the roll wetted with the above aqueous dispersion may be any point before the head,
When ink is not replenished to the ribbon, it is set at an arbitrary position in the ribbon traveling process, and when ink is replenished to the ribbon, it is set at an arbitrary position after the ink replenishment position and before arrival at the head.

Incidentally, after contacting the roll wet with the above aqueous dispersion to the ribbon, before the ribbon portion reaches the head,
A drying means such as air blowing may be provided.

INDUSTRIAL APPLICABILITY The ribbon cartridge of the present invention is useful as a wire dot printing cartridge to be mounted on a printer of equipment such as a computer and a word processor.

Next, the ribbon cartridge of the present invention will be further described with reference to examples.

Example 1 Example 1 FIG. 5 is an explanatory view showing an example of the ribbon cartridge of the present invention.

(1) is an endless ribbon made of nylon woven fabric,
It is impregnated with ink. (2) is a drive roll as an example of a ribbon feeding mechanism for running this ribbon (1),
(6) is a case and (7) is a guide plate. The ribbon (1) runs smoothly only by being taken up by the drive roll (2). Incidentally, (H) is a print head, (P) is a plain paper to be printed, and (3) is a ceramic roll impregnated with a fluororesin aqueous dispersion of the following formulation by a reduced pressure impregnation method, ( Five)
Is a presser roll. Formulation Tetrafluoromethylene homopolymer 5% Tetrafluoroethylene copolymer 4% Silicone grease 5% Paraffinic high-boiling solvent 20% Brightener, surfactant, viscosity modifier, stabilizer 12% Water 54% When the ribbon cartridge was installed in a word processor printer and the smoothness of ribbon running, the print head (H) stain and the degree of print blurring due to it were examined for a long period of time, but the roll (3) was not installed. The result is remarkably superior to the above.

Effects and Effects of the Invention In the ribbon cartridge of the present invention, a small amount of the organic fluororesin aqueous dispersion is transferred to the ribbon fed to the head before the head, and the ribbon has excellent penetration resistance and slippage. Since the stain resistance and antifouling property are given, the contamination of the head due to ink is reduced and the ribbon travels extremely smoothly, which greatly extends the battery life, ribbon life and print head life. Unclear problems, ribbon running problems and other troubles will not occur for a long time.

[Brief description of drawings]

FIGS. 1 to 4 are schematic views showing an example of the installation method of rolls moistened with an aqueous dispersion of an organic fluorine-based resin. FIG. 5 is an explanatory view showing an example of the ribbon cartridge of the present invention. (1) …… ribbon, (2) …… ribbon feed mechanism, drive roll,
(3), (3a), (3b), (3c), (3d) …… Rolls moistened with a dispersion or solution of an organic fluorocarbon resin, (4) …… Guide rolls, (5) …… Presser foot Roll or work piece, (6) …… Case,
(7) …… Guide plate, (H) head, (P) …… plain paper

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-59-12890 (JP, A) JP-A-58-212977 (JP, A) Actually open 60-58360 (JP, U) Actual-open Sho-59- 107776 (JP, U) Actual Kohei 3-51166 (JP, Y2)

Claims (1)

[Claims] 1. A cartridge for wire dot printing, comprising a woven fabric endless ribbon (1) and a ribbon feeding mechanism (2), equipped with a roll (3) moistened with an aqueous dispersion of an organic fluororesin. A ribbon cartridge provided at a position before the ribbon (1) reaches the head so as to come into contact with the head-facing surface of the ribbon (1).