EP1273450A2 - Procédé de fabrication d'une éponge non homogéne et éponge ainsi fabriquée - Google Patents

Procédé de fabrication d'une éponge non homogéne et éponge ainsi fabriquée Download PDF

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Publication number
EP1273450A2
EP1273450A2 EP02013438A EP02013438A EP1273450A2 EP 1273450 A2 EP1273450 A2 EP 1273450A2 EP 02013438 A EP02013438 A EP 02013438A EP 02013438 A EP02013438 A EP 02013438A EP 1273450 A2 EP1273450 A2 EP 1273450A2
Authority
EP
European Patent Office
Prior art keywords
sponge
plates
ink
pressing device
pore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02013438A
Other languages
German (de)
English (en)
Other versions
EP1273450A3 (fr
EP1273450B1 (fr
Inventor
Joachim Kretschmer
René Butty
Luzius Betschon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pelikan Hardcopy Production AG
Original Assignee
Pelikan Hardcopy Production AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pelikan Hardcopy Production AG filed Critical Pelikan Hardcopy Production AG
Priority to EP10185572A priority Critical patent/EP2316651A1/fr
Publication of EP1273450A2 publication Critical patent/EP1273450A2/fr
Publication of EP1273450A3 publication Critical patent/EP1273450A3/fr
Application granted granted Critical
Publication of EP1273450B1 publication Critical patent/EP1273450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17559—Cartridge manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure

Definitions

  • the invention relates to a method for producing an inhomogeneous sponge, in particular for use as an ink storage, and one made by the process Sponge.
  • Sponges used as ink storage in inkjet printers or so-called “inkjet systems” are used are known from the prior art. They consist of one large number of open pores (capillaries). These pores are when used with ink filled. The ink is stored in the sponge and is only by using the the wetting of the pore generated capillary force again. In this way it is created negative pressure in the ink system by using a sponge as an ink reservoir, which results from the capillary action of the individual sponge pores. Insist If only sponged from pores of a defined size, the vacuum would be during the ink removal from the sponge, apart from the hydrostatic pressure of the ink column, constant.
  • the pore sizes or pore volumes are distributed statistically, i.e. their frequency can be approximated by a Gaussian distribution.
  • a Gaussian distribution of the pore size is shown in FIG.
  • the pore size distribution plays an important role.
  • the contact angle between the sponge material and the ink is greater or less than 90 °
  • the large ones first Pores are emptied because they generate the smallest capillary force, i.e. at the slightest negative pressure can be emptied.
  • the inhomogeneous pore distribution becomes towards the ink outlet in that the sponge locally through a nozzle protruding into the container space is compressed. This will create the desired capillary hierarchy (smaller pores at the ink outlet) stamped on the homogeneous sponge inside the cartridge.
  • the sponge is made by external Forced kept in this partially compressed state.
  • sponge material can have a constant, high pressure on cartridge walls and cartridge cover are exercised. It is also such a compression process not reliably reproducible.
  • the materials involved differ when assembling the sponge Sponge shapes and thus capillary distributions.
  • Another disadvantage of this method is that it compresses the Sponge can cause wrinkles. This has undesirable small sponge pores inside the sponge, which often cannot be emptied because of penetrating Air this volume of ink is cut off from the ink flow.
  • a disadvantage of this cartridge design is finally the nozzle protruding into the container space. This takes up a part of the container volume and thus reduces the maximum storable Amount of ink and thus user benefit.
  • the object of the invention is to use a method for producing a sponge specify as ink storage in ink cartridges, with the disadvantages described can be largely avoided.
  • the object is achieved by a method according to claim 1.
  • a method according to claim 1 is a body made of a porous thermoplastic material between at least two plates of a pressing device arranged and compressed under the action of heat and thermoplastic deformed, creating an inhomogeneous and irreversible density distribution is formed, or one or more density gradients.
  • the process is carried out so that different areas of the porous body have different pore densities.
  • the sponge material creates a sponge with the mean pore volume inside of the sponge body varies. 1, this means the distribution of the pore size can have a positive or negative excess, it can be asymmetrical, flat or steep or it can be two or more peaks.
  • the advantage of this method is in particular in that the different pore volumes within the body also after the Keep cool.
  • the sponge can therefore be cut or shaped in this way be that it can be inserted into a corresponding ink cartridge. Since the Sponge inside the ink cartridge no longer needs to be compressed are cartridge walls and the cartridge cover are not exposed to constant pressure. There is also no need for an inner nozzle to close areas of different pore volumes produce. The entire space inside the cartridge is therefore used for ink storage to disposal.
  • the inhomogeneous distribution of the pore density or pore sizes or pore volumes becomes achieved according to the process by the different degrees of compression of individual areas of the porous sponge material under the influence of heat, i.e. through thermoplastic deformation of the sponge material.
  • the different parts of the porous body be heated to different degrees. In areas of higher temperature the sponge structure softer than in areas with lower temperatures, and therefore under pressure deformed more thermoplastic, thus reducing the pore volume. By cooling of the sponge becomes this changed pore size distribution within the sponge body "Frozen". With different heating of different areas of the It must be ensured that the temperature of the sponge body is never at any point Melting point of the sponge material used, otherwise the entire pore structure can be destroyed.
  • a temperature gradient inside the body during the method according to the invention can also be generated in that the shutter speed of the pressing device is relatively short is chosen. That is, the pressing process is ended before a homogeneous sponge body Temperature distribution has set.
  • the choice of the respective shutter speed is also depending on how thick the sponge material is.
  • the local compression factor i.e. the compression factor in a certain range of the sponge, plays a role in setting a density gradient within the Body.
  • the compression factor is the ratio of unpressed to pressed Understand volume of the sponge.
  • the sponge material is compressed more in some places than in others, i.e. the local compression factor varies within the body. For example can also be achieved in that the thickness of the sponge is not uniform is above its footprint.
  • Another option is to put the sponge in the Arrange press device so that it is only partially covered by the press plates and thus a part of the sponge body is compressed and heated. Beyond that it is also possible to make the pressing surface of the plates inconsistent. That the bottom can have elevations and / or depressions. This option is described below be discussed in more detail. These are just a few examples of how a density gradient is to be trained within the body.
  • the method according to the invention differs from previously used methods of Thermocompression as z. B. in JP 04357046, characterized in that the process is aimed at training a density gradient. While so far thermocompression has been used to achieve pores that are sized not be produced by the foaming process, the known method according to the invention modified so that permanent inhomogeneous sponge structures arise.
  • the sponge materials known in the prior art can be used as sponge bodies for Ink sponges are used.
  • the porous material of the sponge body can in particular contain one or more of the following: polyurethane polyether; Polyurethane-polyester; Melamine.
  • the usual for these sponges can be used as required Additives are added.
  • the porosity of these materials is determined by the usual Foaming process generated.
  • the heat is preferably exerted on the body by at least one of the plates. This means that the plate (s) will be heated before the compression process starts. During the compression process, heat is transferred to the porous body over the side surfaces of the same, which are connected to the plate (s) stand. In this case, the heat penetrates from these side surfaces into the interior of the porous body. This creates a temperature gradient during the pressing process inside the porous body, which results in a density gradient.
  • the plate temperature is between approximately 100 ° C and 250 ° C. As already mentioned, care must be taken that the temperature of the porous The body never reaches the melting temperature of the sponge material.
  • the compression process takes about 10 to 90 minutes.
  • the cooling of the Body preferably takes place after the end of the compression process.
  • a value in the range between 1.5 and. is suitably used as the local compression factor 10 selected.
  • the pore volumes of the original porous material can be based on this Partially reduced by a multiple.
  • a generally known pressing device is used to carry out the method according to the invention used, between their stamps in the form of two plane-parallel plates
  • the body is introduced from porous material and through which the body is avoided is subjected to pressure by transverse forces.
  • both or all of the plates can also be heated, but to different degrees Temperatures. Also in this case there will be a temperature gradient inside the porous Train your body.
  • the embodiment is particularly advantageous when the existing pore volume of the porous body as a whole, but with different Degree to be reduced.
  • plates can be used in the method according to the invention be, which have a flat surface on their side facing the body.
  • a density gradient can also be achieved in that the one used Sponge body three-dimensional on its sides facing the plates structured, in particular corrugated or serrated, surface.
  • the body may have a non-uniform thickness over its base area. The thicker ones Areas of the body are then compressed more, i.e. the local compression factor is bigger in these places. Accordingly, the pore volume decreases at these points.
  • plates are selected which are based on the Body-facing side a three-dimensionally structured, especially wavy or serrated Have surface.
  • the press plates act like an embossing stamp under the influence of which the local compression factor is varied, since the sponge material in those places where the plates bulge away from the sponge body there is a weaker compression.
  • a similar effect can, for example can also be achieved in that several printing plates are used, each of which exert different pressures.
  • a sponge body is used in the method according to the invention cuboid body used.
  • This variant is particularly related to structured press plates advantageous.
  • the compressed sponge body After the compressed sponge body has cooled, it can, preferably by Cut up, divided into several units. This can also be used for a special Cartridge necessary shape of the sponge can be made.
  • the sponge produced by the method according to the invention is characterized in that that its average pore volume or its pore distribution within the sponge varied.
  • the sponge formed has one Area of minimal mean pore volume in an edge area of the sponge. That the average pore volume, starting from this edge area, increases towards the inside of the Sponge body towards. This edge area becomes contiguous when the sponge is used arranged on an ink outlet of the cartridge, so that the anisotropy of the Capillary forces run in the desired direction.
  • the sponge according to the invention can be designed so that its average pore volume decreases continuously from one side to the other.
  • the characteristic sponge curve is significantly smoothed in an advantageous manner compared to FIG.
  • Figure 1 shows the relative distribution of the pore size or the pore volume, as in a conventional ink sponge.
  • the associated pressure curve Figure 2 shows the removal of ink from such a sponge.
  • FIG 3 are the flow conditions of the ink within the ink storage sponge an ink cartridge shown.
  • the ink When the ink is removed through the designated ink removal opening, or the outlet, the removed ink must pass through continuously flowing ink can be replaced from other sponge areas.
  • This ink shift within the sponge, or this afterflow of ink is characterized by a Sponge with an inhomogeneous pore distribution supports when the pores to the ink outlet are getting finer and finer.
  • FIG. One way to achieve this capillary gradient due to decreasing pore diameter towards the outlet is shown in FIG.
  • FIGS. 5a to 5c The principle of thermal sponge compression is shown in FIGS. 5a to 5c: A body 1 made of a porous material is here between two plates 2, 3 Press device arranged and under the action of pressure and heat to a fraction compressed to its original volume. After compression, it is replaced by the Plates exerted pressure, the porous body taking its compressed form maintains. The homogeneous reduction of the pore volume compared to the process The initial state, and thus the increase in capillary action, takes place here in particular towards normal to the plates.
  • thermocompression process is carried out inhomogeneously, like this is shown in Figures 6a to 6c.
  • the plates 2, 3 are heated to the supply heat to the porous body 1 during the compression process.
  • the Shutter speed kept so short that there is no uniform temperature over the whole porous body 1 can adjust.
  • different, different strengths compressed areas within the porous body 1 arise. So are the edge areas 1a more compressed and therefore have a lower average pore volume than that central area 1b. As the sponge cools, this changes the pore size distribution frozen.
  • FIGS. 7a to 7c show a further possibility of generating an inhomogeneous pore distribution shown in the sponge body 1.
  • the top plate 2 is on a heated to a higher temperature than the lower plate 3.
  • the sponge structure becomes softer due to the increased heat in the upper area, than is the case in the lower area of the sponge and is therefore more compressed. It this results in a one-dimensional anisotropy of the pore distribution in the sponge.
  • Figures 8a and 8b represent a third way of carrying out the invention Process there.
  • no plane-parallel, i.e. H. cuboid, sponge plate used as is the case in the previous examples, but a sponge plate with three-dimensional surface structure.
  • This sponge plate structured in this way compressed you get again a plane-parallel plate, but with an inhomogeneous pore distribution.
  • the inhomogeneous pore distribution results from the fact that the areas 1a larger thickness can be compressed more.
  • By cutting out the individual Sponges from the entire plate create an inhomogeneous sponge for each cartridge defined pore distribution. Examples of cut edges for subdivision into single sponge areas are represented by lines 4.
  • the different pore distribution can Example serve the hydrostatic pressure component when ink is removed to compensate for slanted sponge cartridges.
  • this example works therefore, by shaping the original sponge during the forming process to be plane-parallel Sponge plate to create a defined inhomogeneous pore distribution.
  • FIGS. 9a to 9c A last example of a method according to the invention is shown in FIGS. 9a to 9c.
  • the plates 2, 3 of the pressing device in this case designed as a stamp. This creates Sponge zones 1a, which are characterized by stronger compression than sponge zones 1b are. It can also be used to adapt the sponge to a specified one Ink tank geometry done.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
EP02013438A 2001-07-05 2002-06-13 Procédé de fabrication d'une éponge non homogène Expired - Lifetime EP1273450B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10185572A EP2316651A1 (fr) 2001-07-05 2002-06-13 Procédé de fabrication d'une éponge non homogène

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10132511A DE10132511A1 (de) 2001-07-05 2001-07-05 Verfahren zur Herstellung eines inhomogenen Schwammes und danach hergestellter Schwamm
DE10132511 2001-07-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP10185572.4 Division-Into 2010-10-01

Publications (3)

Publication Number Publication Date
EP1273450A2 true EP1273450A2 (fr) 2003-01-08
EP1273450A3 EP1273450A3 (fr) 2003-11-19
EP1273450B1 EP1273450B1 (fr) 2011-01-12

Family

ID=7690649

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02013438A Expired - Lifetime EP1273450B1 (fr) 2001-07-05 2002-06-13 Procédé de fabrication d'une éponge non homogène
EP10185572A Withdrawn EP2316651A1 (fr) 2001-07-05 2002-06-13 Procédé de fabrication d'une éponge non homogène

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10185572A Withdrawn EP2316651A1 (fr) 2001-07-05 2002-06-13 Procédé de fabrication d'une éponge non homogène

Country Status (3)

Country Link
EP (2) EP1273450B1 (fr)
AT (1) ATE495018T1 (fr)
DE (2) DE10132511A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210169299A1 (en) * 2018-08-13 2021-06-10 Bright Box Lab, LLC Layered scrub

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306198A1 (de) * 2003-02-13 2004-08-26 Coronet-Werke Gmbh Reinigungs- oder Applikationsschwamm und Verfahren zu seiner Herstellung
CN111251524B (zh) * 2020-01-21 2021-06-08 四川大学 基于梯度温度的梯度多孔聚合物泡沫材料的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709210A1 (fr) 1994-10-31 1996-05-01 Hewlett-Packard Company Dispositif d'écriture à jet d'encre à gradient capillaire
US6042225A (en) 1994-10-31 2000-03-28 Hewlett-Packard Company Ink-jet pen with one-piece pen body

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3160312B2 (ja) 1990-07-10 2001-04-25 キヤノン株式会社 インクジェットカートリッジ及び該カートリッジを用いた記録装置
GB2249054B (en) * 1990-07-10 1994-10-19 Canon Kk Ink tank,ink jet cartridge having the tank,and ink jet recording apparatus having the cartridge
AT401268B (de) * 1992-10-15 1996-07-25 Greiner & Soehne C A Schaumstoffelement, insbesondere formteil aus einer oder mehreren platten aus schaumstoff und verfahren zu seiner herstellung
CA2168141C (fr) * 1995-02-06 2000-11-21 Thyagaraj Sarada Methode de fabrication d'une mousse de porosite diverse servant au dosage de l'encre et d'autres liquides
US5892527A (en) * 1996-04-22 1999-04-06 Lexmark International, Inc. Ink cartridge with an unfelted foam and method of printing using the same
GB2316037B (en) 1996-08-02 2000-03-22 Seiko Epson Corp Ink cartridge and a printing device using the ink cartridge
AU5226099A (en) * 1998-07-24 2000-02-14 3Wg, Incorporated Multiple members acting singularly for retaining fluid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709210A1 (fr) 1994-10-31 1996-05-01 Hewlett-Packard Company Dispositif d'écriture à jet d'encre à gradient capillaire
US6042225A (en) 1994-10-31 2000-03-28 Hewlett-Packard Company Ink-jet pen with one-piece pen body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210169299A1 (en) * 2018-08-13 2021-06-10 Bright Box Lab, LLC Layered scrub
US11786099B2 (en) * 2018-08-13 2023-10-17 Bright Box Labs, LLC Layered scrub

Also Published As

Publication number Publication date
EP2316651A1 (fr) 2011-05-04
ATE495018T1 (de) 2011-01-15
DE10132511A1 (de) 2003-01-30
EP1273450A3 (fr) 2003-11-19
DE50214854D1 (de) 2011-02-24
EP1273450B1 (fr) 2011-01-12

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