JPH03193381A - Ink ribbon cassette - Google Patents

Abstract

PURPOSE:To adjust the quantity of supersaturated supply ink, and to keep the quality of printing excellent at all times by mounting an ink absorber drawing the surface of a ribbon and absorbing supersaturated supply ink into the carrying path of the ink ribbon. CONSTITUTION:An ink absorber 7 is formed by a felty member or a member such as the loop side face of an engaging member having detachable both surfaces. An ink ribbon 6 stores ink more than its own capillary phenomenon capacity and supersaturated supply ink more than required exists on the surface of the ribbon 6 under a floated state when a ribbon driving gear 3 on which ink is transferred by an ink supply body 2 receives the supply of excess ink when the ribbon 6 is fed with ink by revolution. The ribbon 6 passed through the ink absorber 7 draws and equalizes supersaturated supply ink floating on the surface of the ink absorber 7 by the resiliency of the absorber 7, and supersaturated supply ink is absorbed and stored in the supersaturated supply ink absorber 7 by a capillary phenomenon. Accordingly, the ink ribbon 6 passed through the ink absorber 7 holds the proper quantity of ink at all times, thus keeping the quality of printing under an optimum state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ink ribbon cassette that can adjust the amount of supersaturated ink supplied and maintain good print quality at all times.

(Prior Art) Conventionally, an ink ribbon cassette having a configuration as shown in FIG. 3, for example, has been known as an ink ribbon cassette that enables long-life printing of ink ribbons used in printing devices such as typewriters and printers. There is.

That is, this type of ink ribbon cassette has an ink supply body 2 such as an ink tank or an ink roll disposed inside a cassette case body 1, and is rotated clockwise in the figure by a cassette drive shaft of a printer (not shown). The ribbon driving gear 3, together with the ribbon driven gear 5 to which a pressing force is applied by the presser spring 4, transports and drives the ink ribbon 6 inserted between both 3 and 5 in the direction of arrow a.

At this time, the ink supply body 2 rotates about its rotation axis 2a while being appropriately deformed by the ribbon drive gear 3, but the ink supply body 2, which is deformed as it rotates, impregnates itself. The ink is transferred to the ribbon drive gear 3, and the ink is supplied to the ink ribbon 6.

In this way, this type of ink ribbon cassette supplies ink to the ink ribbon 6 being transported and driven by the ink supply body 2, thereby achieving long-life printing.

(Problem to be Solved by the Invention) However, although the ink ribbon cassette of this type can supply an appropriate amount of ink when printing with a printing pattern similar to that of a ship, When printing only ruled lines used for printing, or printing patterns that are rarely printed, the amount of ink supplied to the ink ribbon becomes excessive.

As a result, dots bleed during printing, resulting in deterioration of print quality, and ink may accumulate at the tip of the print head, staining the head.

This invention has been made in view of the circumstances described in item 2, and its purpose is to provide an ink ribbon cassette that can adjust the amount of supersaturated ink supplied and maintain good print quality at all times. There is a particular thing.

(Means for Solving the Problems) In order to achieve the above objects, the present invention includes an ink supply body in a cassette case and a ribbon drive gear that is supplied with ink from the ink supply body. In an ink ribbon cassette which is provided and drives the ink ribbon to be endlessly conveyed by inserting the ink ribbon between the ribbon drive gear and a driven gear paired therewith,
An ink absorber was provided in the conveying path of the ink ribbon, which elastically contacts the ink ribbon, squeezes the ribbon surface, and absorbs supersaturated ink that is excessively supplied to the ink ribbon and floats on the ink ribbon surface due to capillary action. It is characterized by

(Function) The ink replenisher provided in the cassette case presses the ribbon surface while elastically contacting it, and absorbs supersaturated ink that is excessively supplied to the ink ribbon and floats on the ink ribbon surface due to its capillary action. and maintain good print quality at all times.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Incidentally, the same months as those in the conventional example shown in FIG. 3 will be described with the same reference numerals.

FIG. 1 is an explanatory sectional view showing an example of an ink ribbon cassette according to the present invention, and numeral 1 in the figure is a known cassette case.

Reference numeral 2 denotes an ink supply body disposed at a predetermined location within the bipedal cassette case 1, formed of an ink tank or an ink roll, and rotated about its rotation axis 2a.

Reference numeral 3 denotes a ribbon drive gear, and this gear 3 is rotated by a cassette drive shaft of a printer (not shown) in the direction of one rotation in the figure, and is connected to the ink supply body 2 marked with "-", and is connected to the ink supply body 2. Rotate it while giving it deformation.

5 is a ribbon driven gear, and this ribbon driven gear 5 is
The ink ribbon 6 is applied with a pressing force by the presser spring 4, is connected to the ribbon drive gear 3 to form a pair therewith, and is inserted between the driven gear 5 and the bipedal ribbon drive gear 3. The ink ribbon 6 is pinched and driven to be conveyed in the direction of the arrow a in the figure.

On the other hand, 7 is an ink absorber, and this ink absorber 7 is made of a member capable of absorbing the ink that is excessively supplied to the ink ribbon 6 and floats on the surface of the ink ribbon 6 by its capillary phenomenon, such as a felt-like material or a commercially available double-sided material. It is formed using a part such as a loop side surface of a detachable locking member.

This ink absorber 7, as shown in FIG.
The ink ribbon 6 is composed of supply bodies 7a and 7b that sandwich the ink ribbon 6 being conveyed so that it can be inserted into both sides.
To effectively squeeze a surface and even out ink that is unevenly distributed and stored.

Since the ink ribbon cassette according to the present invention is configured as shown in section 2, the ribbon drive gear 3 to which ink has been transferred by the ink supply body 2 supplies ink to the ribbon 6 by its rotation. At this time, if excessive ink is supplied, the ink cartridge 6 will store ink of its own capillary action ability device.
Therefore, the supersaturated ink that is more than necessary exists in a floating state on the surface of the ink ribbon 6.

However, the ink ribbon 6 passing through the ink absorber 7 installed in the cassette case 1 is
The elastic force of the ink absorber 7 can squeeze and homogenize the supersaturated ink floating on the surface, and the capillary action of the ink absorber 7 can absorb and store the supersaturated ink inside the ink absorber 7.

Therefore, the ink ribbon 6 passing through the ink absorber 7 can constantly maintain an appropriate amount of ink, and it is possible to maintain the print quality in an optimum state or prevent the tip of the print head from becoming dirty.

Note that the ink absorber 7 can be formed of any material as long as it has capillary action, and its size and number can be freely set as long as it does not interfere with the running of the ink ribbon 6. .

(Effects of the Invention) As explained above, according to the present invention, the ink absorber provided in the conveyance path of the ink ribbon,
Supersaturated ink that is excessively supplied to the ink ribbon and floating on the surface of the ink ribbon is elastically squeezed and made uniform, and can be absorbed and stored in the ink absorber through capillary action, reducing ink consumption. Even when printing a small amount of ruled lines or printing patterns that are rarely printed, it is possible to always maintain good print quality, and to prevent the tip of the ink head from being soiled by supersaturated ink supply.

Therefore, this type of ink ribbon cassette can greatly contribute to improving the performance and maintenance of a printing device.

[Brief explanation of drawings]

FIG. 1 is an explanatory sectional view showing one embodiment of an ink ribbon cassette according to the present invention, FIG. 2 is an enlarged sectional view showing the ink absorber portion of FIG. 1, and FIG. 3 is an example of a conventional ink ribbon cassette. FIG. 1... Cassette case 2... Ink supply body 3... Ribbon drive gear 5... Ribbon driven gear 6... Ink ribbon 7... Ink absorber

Claims (1)

[Claims] 1. An ink supply body is provided in the cassette case, and a ribbon drive gear is provided to which ink is supplied from the ink supply body, and between the ribbon drive gear and the driven gear paired therewith. In an ink ribbon cassette that inserts an ink ribbon and drives the ink ribbon to be conveyed endlessly, during the conveyance path of the ink ribbon, the ink ribbon comes into elastic contact with the ink ribbon, squeezes the ribbon surface, and is excessively supplied to the ink ribbon due to capillary action. An ink ribbon cassette characterized by being provided with an ink absorber that absorbs supersaturated supplied ink floating on the surface of the ink ribbon.