JPS5931479B2 - Ink supply device in printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for replenishing ink ribbons used in printing mechanisms, particularly typewriters, during their use.

More specifically, the present invention relates to a device for replenishing ink to an ink ribbon in an ink ribbon cassette for a typewriter used as a printing mechanism such as a typewriter or a ticket vending machine, particularly a computer terminal.

In a printing mechanism such as a typewriter, printing is performed via an ink ribbon between a printing medium (for example, a paper tape) and type.

Conventionally, this ink ribbon is used by fixing its ends to two spools and repeatedly unwinding and rewinding the ribbon. Naturally, there is a limit to the amount of ink that an ink ribbon can contain, and in the case of long-time typesetting work, the ink ribbon must be replaced frequently. For example, typewriters, which are used as computer terminals, are used continuously for very long periods of time, so the ink ribbon must be replaced particularly frequently, which is a big problem when used as a computer terminal. . Computer terminals are not limited to typewriters, and in order to solve the problem of the ink content limit of ink ribbons, methods of replenishing ink to ink ribbons have been considered. For example, in Japanese Patent Application Laid-Open No. 49-19918, an ink ribbon is built into the force set, and an ink impregnated roll for ink replenishment is installed within the force set.
A method is shown in which the ink ribbon is moved in contact with the ink-impregnated roll and the ink ribbon is replenished from the ink-impregnated roll. In addition, special public service 1982-1982
No. 22 discloses a method for replenishing ink to an ink ribbon by sending ink from an ink tank to the circumferential surface of a Iwa ink coating roll and bringing the ink ribbon into contact with a part of the circumference of the ink coating roll. ing. As described above, the conventional method of replenishing ink to an ink ribbon attempts to achieve its purpose by bringing the ink ribbon into contact with the circumferential surface of an ink replenishment roll.
However, such conventional methods have various problems. First, when using an ink-impregnated roll, the ink does not bleed completely from the center of the roll to the roll periphery, and all of the ink contained in the roll is consumed, that is, cannot be replenished, resulting in wasted ink. There is a school b. Also,
The material of this ink-impregnated roll is rubber, and since the roll is manufactured by kneading ink at the same time as the rubber is masticated, it is inevitable that the roll will be expensive. On the other hand, in the case of using an ink tank and an ink application roll, the mechanism is complicated and maintenance and repair thereof is complicated and also leads to high costs. The inventors
In view of the above-mentioned problems, the present invention has been completed as a result of intensive research to develop an ink replenishing device that has a simple, effective mechanism, and is inexpensive.

In the present invention, one end of a felt is brought into contact with the stored ink, the ink is gradually leached from the ink reservoir, and one finger of ink is held on the circumferential surface of a roll that is rotated in contact with the other end of the felt, and this is applied to an ink ribbon. By transcribing it into
An ink replenishing device with an extremely simple and effective mechanism for replenishing ink has been completed, and the problems of the conventional method have been solved.

That is, the present invention, as shown in the drawings,
Either side of the container 3 whose interior is divided into two with only a minute gap 2 left in the partition b plate 1 with the partition b plate 1 as a boundary, and which is perpendicular to the partition b plate 1 The side farthest from the minute gap 2 in the partition b1 has an opening 4, and the felt 5 seals the opening 4 from the opening 4, and reaches or does not reach the minute gap 2 formed by the partition b plate 1. 4 containers 3, with a part of the container 3 protruding from the opening 4.
A top plate 7 having appropriate elasticity is attached to the back surface of the felt 5 that protrudes outside, and a part of the circumferential surface of a rotatable ink transfer roll 8 is attached to the tip of the felt 5 that protrudes outside the container 3. This is an ink replenishing device for a printing mechanism characterized by parts that are in contact with each other.

Since the present invention employs a method in which ink is stored in a container and gradually leached out through a felt, the stock amount of replenishment ink is larger than that of a conventional roll-type ink replenishment mechanism. It is an extremely economical and functional ink replenishing device that can completely consume the ink.

The most important feature of the invention is that excessive leaching of ink onto the felt must be controlled.

In the present invention, one end of the felt is immersed in ink stored in a container, the ink is leached to the other end of the felt that protrudes outside the container, and the leached ink is supplied to the ink ribbon via an ink transfer roll. Since the mechanism is to impregnate the ink, excessive leaching of ink causes the ink ribbon to be replenished and impregnated with more ink than necessary, which is uneconomical. Alternatively, it may cause stains around the device, resulting in a defective printing mechanism and failure to fully achieve the purpose. Furthermore, if the amount of ink leached is too small, the ink replenishment will be reduced due to the amount of ink consumed, and the ink will not be able to function satisfactorily. As a result of repeated many tests, the inventors of the present invention succeeded in fully fulfilling the functions described above by providing many features as described below.

That is, one of the features of the ink replenishing device of the present invention is that the container, which is the main part constituting the ink replenishing device, is in a state where only a minute gap is left between the open part and the sealed part. This point is divided by partition B board. The second feature is that one end of the felt protrudes from the opening, and the other end either reaches the minute gap or does not reach there, forming a void there. That is, the part from the opening to the minute gap is densely filled and inserted. To explain this according to the drawing, containers 3 divided by partition b plate 1
A felt 5 is filled and inserted into a portion having an opening 4, so that a small amount of stored ink 1'' remains deep inside.

By doing this, the ink 11' stored in the upper sealed part passes through the minute gap 2 and is supplied as the stored ink 1 to the cavity formed at the end of the felt 5. will be done. b, the felt end is not immersed in the entire ink reservoir, but only a portion of the entire reservoir ink remains in contact with the felt end, b, so that an optimum amount of ink covers the felt. Since the ink gradually oozes out, there is no need to oversupply ink to the ink ribbon 12, and the ink can be replenished very smoothly.

The present invention controls the amount of ink that leaches into the felt using the design with the features described above, but more complete control of the amount of ink that leaches into the felt is also influenced by the physical properties of the felt. Ru.

That is, the amount of ink leaching from the felt that protrudes outside the container and comes into contact with the ink transfer roll must be controlled as much as possible. Therefore, it is most preferable to use a felt with a density of 0.4 or more. However, when such high-density felt is used alone, the ink leaching speed from the other end of the felt to the part protruding outside the container is slow, and the ink supply may run out midway, especially when printing is frequently done. There is a risk that it will happen. Therefore, when using a felt with a density of 0.4 or more as the felt protruding outside the container, use a material such as urethane foam or other sponge with a density of 0.4 or less in the space that can impregnate and retain the ink. Filling with a filling material with porosity allows the optimal amount of ink to be delivered without reducing the ink leaching rate.
The ink transfer roll can be replenished. By the way, ink is replenished to the ink ribbon 12 by an ink transfer roll 8 that rotates in contact with the felt end protruding outside the container 3.
However, the contact pressure of the ink transfer roll 8 tends to cause problems such as the ends of the felt being pushed and bent.

Therefore, in order to prevent such troubles and to ensure smooth ink replenishment, a splint plate 7 having appropriate elasticity is attached to the back surface of the felt end protruding outside the container 3. As shown in FIGS. 2 and 4, this splice plate 7 may also serve as the partition b plate 1, or may be provided independently, according to various structures of the ink replenishing device of the present invention. There is. Furthermore, a plastic board, a wooden board, a thin metal plate, or the like is used for the splicing plate and the partition b board. On the other hand, the ink transfer roll may be either a rubber roll or a metal roll. The minute gap 2 referred to in the present invention is mainly constituted by the partition plate 1 and one wall surface of the container 3, but this minute gap 2 does not necessarily have to be linear, and as shown in FIG. It may be a gap having a shape as shown in FIG. 1, or it may be a hole having an appropriate shape provided at the end of the partition b plate 1 itself.

The present invention solves the problem of oversupply of ink to the ink ribbon.
Although it was completed after repeated research to avoid various troubles, it can be even more effective if it has the features described below.

That is, as shown in the drawing, the thickness of the tip of the felt 5 that protrudes outside the container 3 is cut out in a B-shape 6, and the thickness of the tip of the felt that the ink transfer roll 8 comes into contact with is equal to the thickness of the tip of the felt 5 that is filled into the container. By making the ink content at the tip of the felt smaller than the thickness of the felt part, excessive replenishment of one ink can be more effectively prevented.

Furthermore, during printing, the entire width of the ink ribbon is not used, and usually the lower side of the ink ribbon is not used.

Therefore, supplying ink over the entire width of the ink ribbon actually results in an excess amount of ink being supplied to the lower part of the ink ribbon. This can easily cause printing to smudge and surrounding areas to get dirty. Therefore, in the present invention, by cutting out a portion of the felt that corresponds to the lower side of the ink ribbon in the width direction of the portion of the felt that protrudes outside the container, ink correction to the lower side of the ink ribbon is stopped. Solving the troubles mentioned above,
It is also possible to more effectively replenish ink.

In the present invention, the felt filled into the container is densely packed.

Therefore, in the event that the ink is pushed out due to the expansion of the air existing inside b1 where the ink has expanded due to heat, there is no place for the ink to escape, and in such a case, the felt protruding outside the container may be pushed out. Ink leaks from the tip b
1. The stability of ink supply to the ink ribbon may be disrupted. In order to prevent such troubles, as shown in Figures 1, 4 and 5, the felt 5 inside the container 3 should be
A groove 9 is provided on one or all of the surfaces in contact with the wall of the container 3, running perpendicularly to the length direction of the felt 5, having an appropriate depth and an appropriate length width, Furthermore, it is also effective in the present invention to provide a hole 10 with a diameter equal to or smaller than the width of the groove 9 in the wall of the container 3 at a location where the groove 9 contacts. In addition, ink can be added to the container by providing an ink addition hole 15 in a part of the top plate 13 of the container 3 and adding the required amount from there, or by adding ink to the top plate 13 or the back plate of the container 3. One of the methods is adopted in which one of 14 is made removable, which is removed at any time, the required amount is added, and then it is attached and fixed again.

The felt used in the present invention may be any ordinary felt, and the container may be made of any material such as plastic, metal, or wood.

The ink replenishing device of the present invention has a simple structure, so it is economically superior and at the same time extremely functional, making a great contribution to a wide range of printing mechanisms.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an ink supply device of the present invention;
Figures 2 and 3 are AA'' sectional views, Figures 4 and 5 are A
, b show BW cross-sectional views. 1...Partition plate, 2...Minute gap, 3
...Container, 4...Opening, 5...
・Felt, 6...L-shaped notch, r...
・Splicing plate, 8... Ink transfer roll, 9...
... Groove, 10... Hole, 11,1V...
・Ink, 12...Covered font, 13...
・Top plate, 14... Rear plate, 15...-
Ink addition hole, 16...Filling substance.

Claims (1)

[Scope of Claims] 1. Either part of a container 3 whose interior is divided into two by the partition plate 1 with only a minute gap 2 remaining, with the partition plate 1 as a border, the partition plate 1 Of the two side surfaces perpendicular to , the side farthest from the microgap 2 has an opening 4 , from which a felt 5 with a density of 0.4 or more seals the opening 4 and is formed by the partition plate 1 . It is filled and inserted to the extent that it reaches or does not reach the minute gap 2, but a part protrudes from the opening 4 to the outside of the container 3, and the thickness of the part of the protrusion is L-shaped. In a structure in which a notch 6 is formed in the container 3, (a) a splint 7 having appropriate elasticity is attached to the back surface of the felt 5 that protrudes outside the container 3, and (b) the felt 5 that protrudes outside the container 3 An ink replenishing device for a printing mechanism, characterized in that a part of the circumferential surface of a rotatable ink transfer roll 8 is in contact with a tip end thereof. 2. The printing mechanism according to claim 1, wherein ink addition holes 15 are provided at appropriate locations on the top plate 13 of the wall plate surrounding the space for storing ink 11 in the container 3 as illustrated in the drawings. Ink replenishment device. 3 In the container 3, ink 11 as illustrated in the drawing.
The ink replenishing device in a printing mechanism according to claim 1, wherein the top plate 13 or the back plate 14 of the wall plates surrounding the space for storing ink is detachably constructed. 4 Claim 1 in which the partition plate 1 also serves as the splice plate 7
An ink replenishing device in the printing mechanism according to any one of items 1 to 3. 5 A groove 9 of an appropriate length running perpendicular to the length direction of the felt 5 is provided on a part of one or all surfaces of the felt 5 in the container 3 that is in contact with the container wall, and An ink replenishing device for a printing mechanism according to any one of claims 1 to 4, wherein a hole 10 of an appropriate shape is provided at a location where the groove 9 contacts. 6. An ink supply device in a printing mechanism according to any one of claims 1 to 5, wherein either a rubber roll or a metal roll is used as the rotatable ink transfer roll 8. 7 One part of the container 3 whose interior is divided into two by the partition plate 1 with only a minute gap 2 remaining, with the partition plate 1 as a boundary, and two parts perpendicular to the partition plate 1. Among the side surfaces, the side farthest from the minute gap 2 has an opening 4, and a felt 5 having a density of 0.4 or more seals the opening 4 from the opening 4, and the partition plate 1 is used to fill the formed minute gap 2. The container 3 is filled and inserted so that a void is formed without reaching the opening 4, and a part of the container 3 is protruded from the opening 4, and the thickness of a part of the protrusion is cut into an L-shape. (a) a filling material 1 having a porosity capable of impregnating and retaining an appropriate amount of ink in the void;
(b) a splint 7 having appropriate elasticity is attached to the back surface of the felt 5 protruding outside the container 3; (c) the tip of the felt 5 protruding outside the container 3; An ink replenishing device for a printing mechanism, characterized in that a part of the circumferential surface of an ink transfer roll 8 that is rotatable is in contact with the ink transfer roll 8. 8. An ink replenishing device in a printing mechanism according to claim 7, wherein urethane foam is used as the filler having a porosity capable of impregnating and retaining an appropriate amount of ink.