EP0361034A2 - Tête d'écriture à encre - Google Patents

Tête d'écriture à encre Download PDF

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Publication number
EP0361034A2
EP0361034A2 EP89114581A EP89114581A EP0361034A2 EP 0361034 A2 EP0361034 A2 EP 0361034A2 EP 89114581 A EP89114581 A EP 89114581A EP 89114581 A EP89114581 A EP 89114581A EP 0361034 A2 EP0361034 A2 EP 0361034A2
Authority
EP
European Patent Office
Prior art keywords
ink
silicone oil
writing head
compound
ink writing
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.)
Withdrawn
Application number
EP89114581A
Other languages
German (de)
English (en)
Other versions
EP0361034A3 (fr
Inventor
Karl Heinz Dr. Schmid
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0361034A2 publication Critical patent/EP0361034A2/fr
Publication of EP0361034A3 publication Critical patent/EP0361034A3/fr
Withdrawn legal-status Critical Current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
    • B41J2/135—Nozzles
    • B41J2/16—Production of nozzles
    • B41J2/1606—Coating the nozzle area or the ink chamber

Definitions

  • the invention relates to an ink writing head with a head part having ink ejection channels, which is cast with a rubber-elastic casting compound in an outer holder and the surface of which is provided on the side of the outlet openings of the ink ejection channels with a firmly adhering, water-repellent silanizing layer.
  • ink writing devices In the case of ink writing devices, individual droplets are ejected from the outlet openings of an ink writing head under the action of individually controllable drive elements. Tubes made of piezoceramic, for example, which capture the ink channels in a cylindrical manner can be used as drive elements. An example of this is described in DE-A-35 00 820. In the so-called bubble jet ink heads, heating elements are used as drive elements, which heat up the liquid in the ink channel and cause the ejection by the formation of bubbles. An example of this is described in DE-A-29 43 164.
  • the surfaces of the head parts When using aqueous inks, it is also already known to make the surfaces of the head parts on the side of the ink outlet openings water-repellent. Hydrophobization is achieved by silanizing the surfaces are, that is, by treating the head parts, which are preferably made of glass, quartz, oxide ceramics or silicon, with a silylating agent such as trimethylchlorosilane or hexamethyldisilazane, chemical anchoring of trimethylsiloxyl groups on the front surfaces.
  • a silylating agent such as trimethylchlorosilane or hexamethyldisilazane
  • the front surfaces are covered with a monomolecular, water-repellent layer.
  • the chemical anchoring takes place via Si-O-Si or, in the case of aluminum oxide ceramics, via Si-O-Al links. Such bonds are not completely stable to hydrolysis, i.e. the water-repellent effect diminishes over time with permanent exposure to aqueous inks.
  • the invention has for its object to provide a hydrolysis-stable and permanently hydrophobic surface on ink outlet heads on the side of the outlet openings of the ink ejection channels.
  • the invention is based on the knowledge that the silicone oil added to the potting compound and thereby stored in the potting compound later diffuses slowly out of the potting compound during operation of the ink writing head and spreads selectively on the silanized surface of the head part by creeping. Silicone oil completely wets silanized surfaces. It strengthens the hydrophobic effect of the stuck monomolecular siloxyl layer, protects it from hydrolysis and is supplied from the inside of the sealing compound when it has been removed mechanically or by cavitation during writing operation.
  • Potting compounds within the meaning of the invention are intended to include all rubber-elastic and processable compounds are understood, to which silicone oil can be added before processing and which after crosslinking still contain the silicone oil in such a form that it can slowly diffuse out.
  • silicone oils are to be understood in particular as all linear-polymer and cyclic-polymeric dimethylsiloxanes and also polymethylphenylsiloxanes. These silicone oils usually represent clear, colorless, neutral, odorless, hydrophobic liquids, the hydrophobizing property for the action of the measures according to the invention being particularly emphasized.
  • a proportion of at least three percent by weight should expediently be added to the potting compound.
  • a proportion of at most 50 percent by weight is added to the potting compound.
  • a proportion between 15 and 25 percent by weight of silicone oil can be mentioned as the optimal range.
  • the drawing shows in a section the parts of an ink writing head necessary for understanding the invention.
  • it is a headboard made using planar technology know, with an ink supply channel 2, an adjoining narrower ink ejection channel 3 and its outlet opening 4.
  • the head part 1 actually has a plurality of the channels mentioned, the number of ink outlet openings 4 can be specified, for example, with 40.
  • Suitable materials for the head part 1 are, for example, glass, quartz and silicon.
  • the head part 1 which is designed, for example, as a bubble jet write head, is cast into an outer holder 6, which consists, for example, of a solid plastic, after the electrical leads have been soldered for fastening to a carriage (not shown in the drawing).
  • silicone oil is added to this potting compound 7 before processing and finely distributed by mixing.
  • This silicone oil then later diffuses slowly from the sealing compound 7 during operation of the ink writing head and spreads out by creeping, the silanization layer 5 being completely wetted.
  • the resulting silicone oil layer 8 as a result of this wetting reinforces the hydrophobizing effect of the underlying monomolecular siloxyl layer, at the same time protects it from hydrolysis and is replenished from the inside of the sealing compound 7 if the silicone oil layer 8 has been removed mechanically or by cavitation during writing operation. Even with permanent exposure to aqueous inks, the water-repellent effect can be achieved Maintain security.
  • a silicone rubber with the designation Wacker-Silicon RTV 1 from Wacker Chemie GmbH, 8000 Kunststoff, DE was used as casting compound 7, to which a proportion of 20% by weight silicone oil with the designation Wacker-Silicon Oil AK 350 from the same manufacturer was added before processing. By adding 20 percent by weight of this silicone oil to the Wacker silicone HTV R 100 from the manufacturer mentioned, comparable good results could be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP89114581A 1988-09-28 1989-08-07 Tête d'écriture à encre Withdrawn EP0361034A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832894 1988-09-28
DE3832894 1988-09-28

Publications (2)

Publication Number Publication Date
EP0361034A2 true EP0361034A2 (fr) 1990-04-04
EP0361034A3 EP0361034A3 (fr) 1990-07-11

Family

ID=6363882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114581A Withdrawn EP0361034A3 (fr) 1988-09-28 1989-08-07 Tête d'écriture à encre

Country Status (3)

Country Link
US (1) US4937596A (fr)
EP (1) EP0361034A3 (fr)
JP (1) JPH02121841A (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0756934B1 (fr) 1991-01-18 2000-08-02 Canon Kabushiki Kaisha Tête, cartouche et imprimante à jet d'encre
DE69328714T2 (de) * 1992-12-25 2000-12-28 Canon K.K., Tokio/Tokyo Flüssigkeitstrahlkopf und Vorrichtung dafür
EP0694400B1 (fr) * 1994-07-29 2003-01-08 Canon Kabushiki Kaisha Tête d'impression à jet d'encre, cartouche pour tête d'impression, appareil d'enregistrement à jet d'encre et procédé de fabrication de la tête
US5598193A (en) * 1995-03-24 1997-01-28 Hewlett-Packard Company Treatment of an orifice plate with self-assembled monolayers
US5901425A (en) 1996-08-27 1999-05-11 Topaz Technologies Inc. Inkjet print head apparatus
US6190003B1 (en) 1996-12-20 2001-02-20 Seiko Epson Corporation Electrostatic actuator and manufacturing method therefor
JP6228012B2 (ja) 2011-01-19 2017-11-08 プレジデント アンド フェローズ オブ ハーバード カレッジ 高圧力安定性、光透過性、および自己修復特性を伴う易滑性表面
CA2825012C (fr) 2011-01-19 2021-03-23 President And Fellows Of Harvard College Surfaces glissantes poreuses impregnees de liquides et leur application biologique
CA2878683C (fr) 2012-07-12 2021-07-20 President And Fellows Of Harvard College Surfaces polymere autolubrifiantes glissantes
EP2872573A1 (fr) 2012-07-13 2015-05-20 President and Fellows of Harvard College Matériaux répulsifs multifonctionnels
US10385181B2 (en) 2013-03-13 2019-08-20 President And Fellows Of Harvard College Solidifiable composition for preparaton of liquid-infused slippery surfaces and methods of applying
WO2020077160A1 (fr) 2018-10-11 2020-04-16 Freeflow Medical Devices Llc Revêtements anti-thrombotiques à base de fluoropolymère
WO2020077161A1 (fr) 2018-10-11 2020-04-16 Freeflow Medical Devices Llc Emballage pour dispositifs médicaux revêtus de liquides perfluorés ou de dispersions de ceux-ci

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195304A (en) * 1978-06-05 1980-03-25 The Mead Corporation Charge plate and method of manufacture
DE2930004A1 (de) * 1979-07-24 1981-03-12 Siemens AG, 1000 Berlin und 8000 München Piezoelektrisches antriebselement fuer schreibkoepfe in tintenmosaikschreibeinrichtungen.
JPS5689569A (en) * 1979-12-19 1981-07-20 Canon Inc Ink jet recording head
US4734706A (en) * 1986-03-10 1988-03-29 Tektronix, Inc. Film-protected print head for an ink jet printer or the like

Also Published As

Publication number Publication date
US4937596A (en) 1990-06-26
JPH02121841A (ja) 1990-05-09
EP0361034A3 (fr) 1990-07-11

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