EP0285217B1 - Device for distributing a medium on a substrate; method for coating a substrate with a medium; substrate coated with use of the device - Google Patents

Device for distributing a medium on a substrate; method for coating a substrate with a medium; substrate coated with use of the device Download PDF

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Publication number
EP0285217B1
EP0285217B1 EP88200558A EP88200558A EP0285217B1 EP 0285217 B1 EP0285217 B1 EP 0285217B1 EP 88200558 A EP88200558 A EP 88200558A EP 88200558 A EP88200558 A EP 88200558A EP 0285217 B1 EP0285217 B1 EP 0285217B1
Authority
EP
European Patent Office
Prior art keywords
slit
medium
substrate
distributing
width
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.)
Expired - Lifetime
Application number
EP88200558A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0285217A1 (en
Inventor
Cornelis Jan Blaak
Ronald Melchior Wens
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.)
Stork Brabant BV
Original Assignee
Stork Brabant BV
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 Stork Brabant BV filed Critical Stork Brabant BV
Priority to AT88200558T priority Critical patent/ATE68412T1/de
Publication of EP0285217A1 publication Critical patent/EP0285217A1/en
Application granted granted Critical
Publication of EP0285217B1 publication Critical patent/EP0285217B1/en
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
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/40—Inking units
    • B41F15/42—Inking units comprising squeegees or doctors

Definitions

  • Device for distributing a medium on a substrate comprising: distributing a medium on a substrate; method for coating a substrate with a medium; substrate coated with use of the device.
  • the invention relates to a device for uniformly distributing a viscous medium in the width direction of a web-like substrate moving predominantly perpendicularly to the device, at least comprising: medium supply means; at least one medium-distributing space and an outflow slit connecting to the distributing space, by a slit-shaped space delimited by two parallel walls, and wherein one or more spacers extend over the slit width.
  • a device of this type is known from DE-A-3200171.
  • the device has a rod-shaped exterior and the central axis of said device is generally oriented predominantly perpendicular to the direction of movement of the substrate, to which the medium is to be applied.
  • the device described comprises one slit-shaped space and is intended for uniformly distributing the medium in the width direction of said moving substrate by feeding the medium to the distributing space through cascade-like feed pipes; yet, such a uniform distribution of medium in the width direction of the substrate can not completely be achieved with said device.
  • the object of the present invention is to overcome the said disadvantages and for this is characterized in that the dimension of the walls delimiting the slit-shaped space (the slit wall height), viewed in the flow direction of the medium, is always at least 25 times the slit width and that the spacers are located in the upstream direction of the viscous medium at a distance more than half the slit wall height, upstream of the slit outflow.
  • a ratio between slit wall height and slit width of 50-150 is employed in the device according to the invention.
  • Slit wall height and slit width will normally be constant over the length of the slit.
  • the ratio slit wall height to slit width will have to be at least 25 in all cases in order to avoid the problems associated with slit adjustment mentioned earlier.
  • shut-off means located in a collecting space connecting to the slit outflow.
  • Said shut-off means are preferably formed by a sliding piece fitting in the collecting space. This sliding piece is advantageously of small length while the remaining length required in the direction of the device concerned is formed by a flexible hose which can be inflated for shuting-off operation.
  • a lateral partition can be present which is orientated vertically on the substrate and extending to the upstream side thereof, and is fitted on one or more of the sliding pieces applied.
  • one or more of the sliding pieces used can very advantageously be provided with lateral bulkheads extending to the upstream side of the substrate and oriented perpendicular to the substrate.
  • the invention also relates to a method for coating, optionally in a pattern, a moving substrate with a viscous medium using a device for distributing said medium, if desired in combination with coating means, which may optionally work in a pattern, this method being characterized in that one or more of the above described devices for distributing medium according to the invention are used in an embodiment suitable for that particular method.
  • the medium-distributing device according to the invention is very advantageously used in cases in which a foam-like medium has to be applied to a moving substrate using a rotary screen printing stencil, known per se, the medium discharge opening of the device resting against the inner wall of said stencil.
  • a rotary screen printing stencil of this type may be an unpatterned stencil for those cases in which the foam is to be applied in an even coating layer to a substrate, for example a textile web.
  • the stencil used may also be provided with a pattern for the case that the foam is to be applied so as to form a pattern.
  • a foam-like medium is distributed on a moving substrate, the foam being supplied at the upstream side of a doctor blade and the medium discharge opening of the medium-distributing device being arranged above the substrate.
  • the two above-described embodiments of the method according to the invention differ not only in respect of the coating means employed in the form of a stencil and a doctor blade.
  • the foam is given the opportunity, when flowing out in the area in front of the doctor blade, to expand completely and the doctor blade exerts an action, forming a coating layer, on the expanded foam.
  • each viscous medium can successfully be processed using a distributing device according to the invention.
  • the invention relates to a substrate obtained by coating, optionally in a pattern, said substrate with a viscous medium, if desired followed by the necessary finishing steps.
  • the uniformity of the distribution of the medium on the substrate over its width is very characteristic if coating is carried out using one or more of the distributing devices, described above, according to the invention.
  • Figure 1 shows a distributing device according to the present state of the art 1 composed of a body 2 with medium-distributing spaces 3 and 4, slit-shaped outflow surfaces 5 and 6, as well as a conventional medium-collecting space 7 and a medium discharge opening 8. Adjustment of the dimension of the slit-shaped outflow surface 5 and 6 is achieved by means of adjustable strips 9 and 10.
  • the medium-distributing device 1 is located at the inner side of a stencil 11, the medium discharge opening 8 being in contact with the inner wall of said stencil 11. The discharged medium passes through the perforations in the stencil and in this way arrives at the surface of the moving substrate 12. Adjustment of the strips 9 and 10 is particularly time-consuming and critical; minor faults in adjustment, as well as deviations as a result of sagging of the device may result in a high degree of non-uniformity of the distribution.
  • Figure 2A and 2B show a distributing devices according to the invention, according to a first embodiment in which the device 20 with a body 21 comprises distributing spaces 22 and 23.
  • the medium can flow into slit-shaped spaces 28 and 29 in the downstream direction, these spaces ending in slit outflows 24 and 25.
  • the slit-shaped spaces are formed by plates 34 and 35 which are fixed by spacers and fastening means 30 and 31, respectively, on a plate, which in this case is arranged centrally, extending over the length of the distributing device.
  • the plates 34 and 35 are in tight contact with the inner wall of the device 20 on one longitudinal side.
  • the slit wall height is 45 mm, while the slit width is 0.5 mm, the quotient between the two parameters therefore being 90.
  • additional adjustment may take place by either varying, while maintaining a ratio of at least 25 between slit wall height and slit width, the slit width according to a particular pattern over the length of the device, with the slit wall height being fixed, or varying the slit wall height according to a particular pattern, with the slit width being fixed, as mentioned before.
  • Figure 3 shows another embodiment of the device; the device 40 comprises medium-distributing spaces 44 and 45, a slit-shaped space 46 of large length, the medium flowing from distributing space 42 in the direction shown by arrow 44 to space 43 and from there, as shown by arrow 45, arriving in the slit-shaped space 46.
  • 47 indicates a spacer intended for maintaining the width of the slit-shaped space at the correctly adjusted value.
  • FIG. 4 shows yet another embodiment of the device according to the invention.
  • the device 50 comprises medium-distributing spaces 51, 52, connecting to slit-shaped spaces 53 and 54, which in turn debouch into a collecting space 57 from which the medium can flow out through medium discharge opening 56.
  • Figure 5 shows the situation in which a substrate 72 is passed over a roll 71, a doctor blade 74 being arranged at short angular distance in front of the perpendicular plane through their axis of the roll.
  • a medium-distributing device 60 is arranged with distributing spaces 63 and 64 to which medium supply lines 61 and 62 connect and in which the distributing spaces 63 and 64 are arranged, as is shown in Figure 4 described above; the slits formed connect to a collecting space 67 which ends in medium discharge opening 75.
  • a sliding piece 69 to which a lateral partition 70 is attached, is received in the collecting space.
  • connection between the rod-shaped section 68 and the lateral partition 70 is formed by a strip-shaped part received in the collecting space 67.
  • Figure 6 shows two graphs in which the amount, in grams, of medium, for example foam medium, applied per minute is given in the vertical direction and the location along the longitudinal direction of the distributing device is given in the horizontal direction.
  • Figure 6A shows the result for a device according to the present state of the art, incorporating two slits complementing each other, while Figure 6B shows the results obtaining using a device according to the invention. It is evident in Figure 6A that the application achieved is not uniform; on the other hand, it can be seen in Figure 6B that an extremely uniform application across the longitudinal direction of the device is achieved by means of a distributing device according to the invention.
  • the medium outflow surface will in many cases be followed by a medium collecting space in which a slit-shaped medium discharge opening is located.
  • a medium collecting space is not necessary, however, in every case, said medium discharge opening can in certain cases be formed by the medium outflow surface, in other words the slit outflow of the slit-shaped space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Screen Printers (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP88200558A 1987-03-31 1988-03-24 Device for distributing a medium on a substrate; method for coating a substrate with a medium; substrate coated with use of the device Expired - Lifetime EP0285217B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88200558T ATE68412T1 (de) 1987-03-31 1988-03-24 Einrichtung zum verteilen eines mediums auf einem substrat, verfahren zum beschichten des substrats mit dem medium, mittels dieser einrichtung beschichtetes substrat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8700754A NL8700754A (nl) 1987-03-31 1987-03-31 Inrichting voor het verdelen van een medium op een substraat; werkwijze voor het met een medium bekleden van een substraat en met behulp van de inrichting bekleed substraat.
NL8700754 1987-03-31

Publications (2)

Publication Number Publication Date
EP0285217A1 EP0285217A1 (en) 1988-10-05
EP0285217B1 true EP0285217B1 (en) 1991-10-16

Family

ID=19849787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200558A Expired - Lifetime EP0285217B1 (en) 1987-03-31 1988-03-24 Device for distributing a medium on a substrate; method for coating a substrate with a medium; substrate coated with use of the device

Country Status (7)

Country Link
EP (1) EP0285217B1 (nl)
JP (1) JPS63270575A (nl)
AT (1) ATE68412T1 (nl)
DE (1) DE3865483D1 (nl)
ES (1) ES2027371T3 (nl)
IN (1) IN170987B (nl)
NL (1) NL8700754A (nl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900915A (nl) * 1989-04-12 1990-11-01 Stork X Cel Bv Inrichting voor tweezijdig bekleden en werkwijze voor het bekleden van een materiaalbaan.
US6286422B1 (en) * 1994-12-27 2001-09-11 Visteon Global Tech., Inc. Method and apparatus for dispensing viscous material
NL1005308C2 (nl) * 1997-02-18 1998-08-20 Stork Brabant Bv Rakel met een vast dragend deel.
DE102008025927A1 (de) * 2008-05-29 2009-12-24 Zyrus Beteiligungsgesellschaft Mbh & Co. Patente I Kg Rotationsdruckmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155034A (en) * 1961-11-01 1964-11-03 Rineglas Inc Silk screen printing press
DE2450309C2 (de) * 1974-10-23 1983-06-16 Mitter & Co, 4815 Schloss Holte Vorrichtung zur Begrenzung des Farbtümpels vor einer im Inneren einer Siebdruckrundschablone angeordneten Auftragsrolle
JPS547306A (en) * 1977-06-20 1979-01-20 Sony Corp Optical video disc reproducer
DE3200171C2 (de) * 1982-01-07 1984-02-09 Mathias 4815 Schloss Holte Mitter Vorrichtung zum Auftragen eines vorzugsweise mit Farbstoff versehenen Auftragsmediums auf eine flächige Ware
NL8201505A (nl) * 1982-04-08 1983-11-01 Stork Brabant Bv Verdeelsysteem voor een visqueuze substantie.
JPS626968A (ja) * 1985-07-01 1987-01-13 株式会社　小南鋳造鉄工所 毛布等のピリング毛玉除去方法並びにその装置

Also Published As

Publication number Publication date
JPS63270575A (ja) 1988-11-08
NL8700754A (nl) 1988-10-17
DE3865483D1 (de) 1991-11-21
ATE68412T1 (de) 1991-11-15
JPH0567344B2 (nl) 1993-09-24
IN170987B (nl) 1992-06-27
ES2027371T3 (es) 1992-06-01
EP0285217A1 (en) 1988-10-05

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