DE10105354A1 - Exchangeable, closed ink supply holder for ink-jet printer, has domed cavity in housing floor around ink removal opening - Google Patents

Abstract

Ink supply holder housing is filled with fine cellular capillary foam material. Domed cavity (10) is in housing floor in region around ink removal opening (4) so housing floor is lowered in several directions to ink removal opening, and that in the so-formed oblique planes spacing-retainers (15) are formed with their upper surfaces (15b) each formed at height of housing floor edge which forms encircling seating surface.

Description

The invention relates to an exchangeable, closed ink reservoir for ink printers, in particular for the arrangement on a nozzle head slide, the housing of the ink reservoir with fine-celled capillary foam is filled with material and at least one tin in the lower region of the housing opening for connection to another container or to a Nozzle head is provided as well as with an upper opening for the atmospheres print.

Such a capillary foam contains both pure ink and waste ink entered from above with separation of air bubbles and the (cleaned) ink leaves the housing through the ink removal opening. Because the storage capacity depends on the volume of the capillary foam, one tries to deduct the keep the amount of ink as high as possible, d. H. the stored ink also like who largely recover. This requires some measures that aid in collecting the ink at the ink withdrawal port.

The object of the invention is to apply ink to inks improve containers and the amount dispensed at the dispensing opening as close as possible to the quantity entered.  

The object is achieved according to the invention in the inks mentioned above Storage container solved in that in the bottom of the housing, in the area around the tin tenentschlußschluß a domed cavity is formed such that the Ge floor from several directions down to the ink removal opening lowers that spacers are formed in the inclined planes formed are, the upper surface of which is at the level of a case bottom edge, which forms a largely circumferential edition. This one described in the Form-formed cavity in the case bottom below the fine-cell foam Fabric storage ensures that the ink is even over a large area is removed from the capillary store. As a result, the path that the ink takes through the sponge towards the ink withdrawal opening, shorter and more even for all areas of the foam. Local inks can also be used impoverished by inhomogeneities in the capillary structure in the ink can occur, no longer hinder the flow of ink. This together hang is particularly beneficial when using an ink with a higher viscosity det, which, however, also has a higher flow resistance during movement the capillary foam.

The preferred direction of the supported by the design of the housing bottom At the same time, ink flow towards the ink removal opening causes air to enter conclusions in this room, the z. B. can arise when changing the cartridge the commissioning of the cartridge can be reliably removed from this area.

In a practical case it is provided that the curved cavity consists of three inclined planes. As a result, the curvature acts in the sense of a Direction setting.

In this case, it is advantageous that the lowering of the cavity moves direction of the ink reservoir over most of the housing base  extends, but perpendicular to it only reaches a limited extent. The The advantage is a choice of arrangement of the ink removal opening in corners or at one end of the ink tank bottom.

One embodiment also provides that the edge of the ink removal opening is closed at least two opposing webs are provided, the upper end of which each ends approximately with the case bottom edge. This will prevent access from Parts of the capillary foam in the area of the ink withdrawal opening are inhibited.

According to further features, it is proposed that the ink removal opening be a Drainage opening with a maximum depth below the edge of the housing bottom bil det. A maximum depth of 0.5 mm is advantageous.

Further advantages result from the fact that the spacers are perpendicular to the loading direction of movement of the housing on the nozzle head slide offset from one another in Rows are arranged. The spacer is thus in the direction of the transverse sides no direct ink flow possible, but the spacers first have to be rinsed.

It is for influencing the flow path of the ink around the spacers advantageous if the spacers are rectangular or approximately elongated Have cross-section. Similar cross sections can be used.

Another development provides that on the circumferential web-shaped Ge a fine-mesh sieve is attached to the floor of the house. In the event that after length If particles should still penetrate through the capillary, they will become held onto the sieve. In addition, this takes care of the structure of the vessel bottom brought fine-meshed sieve that an air breakthrough in the ink withdrawal opening into it is reliably avoided. Practical tests have shown that the vessel bottom structure does not extend over the entire vessel bottom must, but that it is sufficient to provide only part of the structure. This  The relationship is especially true when the ink reservoir is installed in the ink printer has an inclination perpendicular to the direction of movement and thus the ink withdrawal opening is deeper than the circumferential one opposite it de edge of the vessel bottom.

From a manufacturing point of view, it is advantageous that the screen is on the rotating one web-shaped case bottom edge is welded.

In the drawing, an embodiment of the invention is shown, the following will be described in more detail.

Show it:

Fig. 1 is an exploded view of the ink reservoir,

Fig. 2 shows a section through the floor area with an adapter connection and

Fig. 2A shows an enlarged detail "Z" from Fig. 2.

The replaceable closed ink reservoir 1 is introduced into ink printers by the user and replaced when occurring an indication that the ink supply is depleted to a refilled ink reservoir. 1 The ink reservoir 1 is parked especially for the arrangement on a nozzle head slide. For this purpose, a housing 2 is filled with fine-cell, capillary foam 3 . In the lower region 2 a of the housing 2 , an ink removal opening 4 is provided for connection to a further container or to a nozzle head (not drawn). In the upper area 2 b of the housing 2 there is an upper opening 5 for the entry of the atmospheric pressure. The connection for the nozzle head consists of an adapter 6 in the housing base 2 e.

On the housing side walls 2 c clamping elements 7 for locking the Tin tenvorratsbehälters 1 are attached to the (not shown) nozzle head slide.

The vessel 2 forms a single ink chamber 8 with the fine-celled, capillary foam 3 for pure ink 9 and at the same time for recycled ink 9 a to be cleaned and loaded with dirt particles.

A curved cavity 10 is formed in the housing base 2 e in the region of the ink removal opening 4 in such a way that the housing base 2 e lowers towards the ink removal opening 4 from several directions 11 , 12 , 13 . This creates z. B. inclined planes 14 , on each of which in rows 15 a spacers 15 are formed with upper surfaces 15 b. The upper surface 15 b is in each case at the level of a housing bottom edge 2 f. the case bottom edge 2 f forms a flat all-round support.

The arched cavity 10 is composed of three inclined planes 14 in the exemplary embodiment. The directions 11 , 12 , 13 are visible in FIG. 2A.

The lowering of the cavity 10 extends in the direction of movement of the ink reservoir 1 over most (see FIG. 2) of the housing bottom 2 e.

At the edge 16 of the ink removal opening 4 at least two circumferential webs 17 are provided, the upper edge 18 of which ends with the housing edge 2 f. The ink removal opening 4 forms a Draina ge opening 19 with a maximum depth of about 0.5 mm below the Gehäuseebo denrandes 2 f.

The spacers 15 are arranged perpendicular to the direction of movement of the housing 2 on the nozzle head slide offset from one another in rows 15 a. The rows 15 a are z. B. on the left side of FIG. 2A easily recognizable. The spacers 15 in the exemplary embodiment have a rectangular cross section 20 .

On the circumferential web-shaped support 2 g, a fine-mesh sieve 21 is BEFE Stigt. A type of fastening that has proven itself in plastics technology is welding.

LIST OF REFERENCE NUMBERS

1

Ink reservoir

2

casing

2

a lower area

2

b upper area

2

c Housing side wall

2

d lid

2

e case back

2

f Casing bottom edge

2

g edition

3

capillary foam

4

Ink removal opening

5

opening

6

adapter

7

clamping element

8th

only ink chamber

9

clean ink

9

a dirty ink

10

cavity

11

direction

12

direction

13

direction

14

inclined plane

15

spacer

15

a rows

15

b upper surfaces

16

edge

17

Stege

18

upper edge

19

drainage opening

20

rectangular cross section

21

fine mesh sieve

Claims (9)

1. Replaceable, closed ink reservoir for ink printers, in particular for the arrangement on a nozzle head carriage, the housing of the ink reservoir being filled with fine-celled, capillary foam and wherein at least one tin removal opening in the lower region of the housing for connection to another container or ei NEN nozzle head is provided, and with an upper opening for atmospheric pressure, characterized in that a curved cavity ( 10 ) is formed in the housing base ( 2 e) in the area around the ink removal opening ( 4 ) such that the housing base ( 2 e) from a plurality of directions ( 11 , 12 , 13 ) towards the ink discharge opening ( 4 ) lowers that in the inclined planes ( 14 ) each formed from spacers ( 15 ), the upper surface ( 15 b) of which the height of a case bottom edge ( 2 f) are located, which forms a largely all-round edition. 2. Ink supply container according to claim 1, characterized in that the curved cavity ( 10 ) from three inclined planes ( 14 ) is composed. 3. ink reservoir according to one of claims 1 or 2, characterized in that the lowering of the cavity ( 10 ) in the direction of movement of the tin tenvorratsbehälters ( 1 ) over most of the housing base ( 2 e) he stretches perpendicular to it, however, only a limited Expansion reached. 4. Ink supply container according to claim 1, characterized in that at the edge ( 16 ) of the ink removal opening ( 4 ) at least two opposing webs ( 17 ) are provided, the upper edge ( 18 ) of which ends with the housing bottom edge ( 2 f). 5. Ink reservoir according to claim 1, characterized in that the ink removal opening ( 4 ) forms a drainage opening ( 19 ) with a ma ximal depth below the bottom edge of the housing ( 2 f). 6. ink supply container according to one of claims 1 to 5, characterized in that the spacers ( 15 ) perpendicular to the direction of movement of the housing ( 2 ) on the nozzle head carriage offset from one another in rows ( 15 a) are angeord net. 7. Ink reservoir according to one of claims 1 or 6, characterized in that the spacers ( 15 ) have a rectangular cross section ( 20 ) or approximately an elongated cross section. 8. ink supply container according to one of claims 1 to 7, characterized in that on the circumferential web-shaped housing bottom edge ( 2 f) a feinma's sieve ( 21 ) is attached. 9. ink reservoir according to claim 8, characterized in that the screen ( 21 ) on the circumferential web-shaped housing bottom edge ( 2 f) is welded.