JPH0418862Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The invention of this application relates to the continuation or interruption of ink supply in endless ribbon cassettes of typewriters, printers, etc.

[Conventional technology]

Conventional endless ribbon cassettes of line printers are equipped with a felt at the outlet of the ink tank serving as the ink supply source, or a felt or sponge impregnated with ink is brought into contact with the outer periphery of the ink supply gear from the beginning of use. The ink was applied to the outer periphery of the gear, and the ribbon was sent out while being in contact with the gear, thereby supplying the ink to the ribbon.

[Problem that the invention attempts to solve]

The ribbon in a conventional endless ribbon cassette is pre-soaked with a suitable amount of ink, so if you start supplying ink from the ink supply source from the beginning of using the cassette, there is no risk of printing stains due to excess ink. I was getting used to it. In addition, if the amount of ink in the ink supply source was reduced in anticipation of this phenomenon, there were various drawbacks such as shortening the life of the endless ribbon cassette.

[Means for solving problems]

The application of this invention discloses an endless ink ribbon, left and right support arms that support the ink ribbon for a predetermined length for providing printing, and whose left and right open ends form an inlet and an outlet for circulation of the ink ribbon; a pair of rollers provided near one support arm;
An endless ink ribbon cassette comprising an ink blocking film removably installed between an ink supply source and an ink supply member near the other support arm, wherein the ink supply source and the ink supply member are provided near the other support arm. This endless ribbon cassette is characterized in that an ink-blocking film is provided on the outlet side of the ink ribbon circulation, and is removably inserted between the endless ribbon cassette and the ink-cutting film.

[Function] As shown in FIG. 1, the invention of this application is that an endless ribbon 2 is provided between and inside the ribbon support portions of the cassette frame 1, and the ribbon is circulated by the rotation of the feed roller 3. rotate. When the characters start to become faint in the printed state, the film 6 shown in FIG. 2 is pulled up and the ink supply member and the ink supply source are brought into contact and rotated to print clear characters.

〔Example〕

In the endless ribbon cassette according to the invention of this application, the ribbon 2 is set so as to be rotatable by a feed roller 3 provided inside a frame 1 of the cassette.

Further, the ribbon 2 is impregnated with ink to the extent that clear printing is possible.

The ink supply source 4 may have a tank containing ink and a felt provided at its outlet, or may have a felt or sponge soaked with ink built into the tank. The ink supply member 5 is rotatable and has a cylindrical shape with a gear-like cross section, and the inner side of the outer circumference is in contact with the opening of the ink supply source 4, and the outer side of the outer circumference is in contact with the ribbon 2.

A notch 7 is formed in the upper lid of the cassette 1 so as to face between the opening of the ink supply source 4 and the ink supply member 5.

Reference numeral 6 denotes a film that can be inserted into and removed from the notch 7, and has wear resistance and seepage resistance. When this film 6 is inserted into the notch 7, it is inserted between the opening of the ink supply 4 and the ink supply member 5, and the opening of the ink supply source 4 and the ink supply member 5 are kept in a non-contact state. In addition, film 6
One end slightly protrudes from the top cover of the cassette 1.

Further, when this film 6 is pulled out from the notch 7, the opening of the ink supply source 4 and the ink supply member 5 are connected to each other.
makes contact with the inside of the outer periphery.

This invention has the above structure, and the operation and usage of each part will be explained next.

First, when using a new cassette, insert the film 6 into the notch 7. When the cassette is used in this state, the contact between the opening of the ink supply source 4 and the inside of the outer periphery of the ink supply member 5 is broken, and printing is performed using the ink deposited on the ribbon 2 and soaked therein.

Furthermore, if the print begins to fade while using this cassette, the film 6 is wiped off from the notch 7 to bring the opening of the ink supply source 4 into contact with the ink supply member 5. When the cassette is used in this state, the ink supply member 5 rotates in conjunction with the feeding of the ribbon 2, and ink is supplied to the ribbon 2.

If the ink supply becomes excessive, the film 6 is inserted into the notch 7 again to cut off the ink supply.

〔effect〕

Ink is supplied to or stopped from the ribbon at the point closest to the printing section, making it easier to adjust the shading of the print and improve print quality.Only the roller is on the inlet side.
After printing, the ink ribbon with thin ink is held between rollers and pulled in, so the ink does not cause the rollers to slip and ensures reliable pulling.

[Brief explanation of drawings]

FIG. 1 is an explanatory internal plan view of the endless ribbon cassette according to this invention. FIG. 2 is a perspective view of the cassette with the film pulled up. The symbols in the figure are as follows. DESCRIPTION OF SYMBOLS 1...Cassette frame body, 2...Ribbon, 3...Feed roller, 4...Ink supply source, 5...Ink supply member, 6...Film, 7...Film insertion/removal notch.

Claims (1)

[Claims for Utility Model Registration] An endless ink ribbon, and left and right support arms that support the ink ribbon for a predetermined length for printing, and whose left and right opening ends form an inlet and an outlet for circulation of the ink ribbon. , an endless ink ribbon cassette comprising a pair of rollers provided near the one support arm, and an ink blocking film removably provided between the ink supply source and the ink supply member near the other support arm. An endless ribbon cassette, characterized in that an ink blocking film is provided near the other support arm and is removably inserted between the ink supply source and the ink supply member on the exit side of the ink ribbon circulation.