EP0928636A2 - Coating apparatus - Google Patents
Coating apparatus Download PDFInfo
- Publication number
- EP0928636A2 EP0928636A2 EP99100089A EP99100089A EP0928636A2 EP 0928636 A2 EP0928636 A2 EP 0928636A2 EP 99100089 A EP99100089 A EP 99100089A EP 99100089 A EP99100089 A EP 99100089A EP 0928636 A2 EP0928636 A2 EP 0928636A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- slit
- coater
- coating apparatus
- outlet
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
Definitions
- the coating method of an extrusion type can conduct simultaneous multi-layer coating on the so-called wet-on-wet basis, and it is extremely effective in terms of cost and performance for the application to manufacture recent coated products with high value added.
- a method to form the aforesaid coated layers of a multi-layer type by coating a coating solution and drying it for each layer on the substrate to be coated, as disclosed in TOKKAISHO Nos. 51-119204, 52-51908 and 53-16604. In this method wherein steps of coating and drying are repeated, however, there have been problems that productivity is poor and it is difficult to make the uppermost layer to be thin. So, TOKKAISHO Nos.
- the inventors of the invention found that no dust is caught between the tip of a coater and a substrate to be coated, resulting in no occurrence of streak defects, and a substrate to be coated, when it is flexible, does not affect the coating, and thereby thin-layer coating is possible, when extruding a coating solution in a shape of an extremely thin layer by narrowing slit outlet clearance d of the coater to 50 ⁇ m or less, preferably 18 ⁇ m or less which is much narrower than that of the conventional extrusion type coater, and thereby coating by colliding the extruded coating solution film with a substrate to be coated which is conveyed or held to be away from the coater by the distance that is greater than that for the conventional extrusion type coater. It has also been cleared in this coating method that coating can be carried out independently of the coating speed once an extruded solution layer is formed, and the higher the coating speed is, the thinner the solution layer is, resulting in a thinner layer coating.
- a contact angle to be 45° or more by making surface roughness Rmax to be 0.8 ⁇ m or less, preferably to be 0.1 ⁇ m or less, in a surface grinding method.
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- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
In a coating apparatus provided with a conveyor to convey a
substrate to be coated; and a coater including two surfaces (a,b)
opposite to each other so that a slit is formed therebetween,
a coating solution is introduced from an inlet of the slit,
passes through the slit between the two surfaces and is
discharged from the outlet of the slit, the gap distance d of
the slit at the outlet being made so as to satisfy the
following formula: 0 < d ≤ 50 x 10-5 (m) , and at least a part
of the outlet section of the two surfaces (a,b) being formed by a
member having a water-repelling property.
Description
The present invention relates to a coating method and a
coating apparatus, and in particular, to a coating method and
a coating apparatus employing a coater head which conducts
high speed thin layer coating of a coating solution extruded
continuously toward the surface of a substrate to be coated
which moves relatively to the coating head on the surface of
the substrate to be coated so that the thin layer may be of a
uniform thickness.
A method for coating a prescribed coating solution on
the surface of a flexible substrate to be coated has so far
been studied in many ways and has been put to practical use.
Among these various methods, a coating apparatus of an
extrusion type which conducts high speed thin layer coating of
a coating solution extruded continuously toward the surface of
a moving substrate to be coated on the surface of the
substrate to be coated, for example, is superior to other roll
type coating methods such as, for example, reverse roll, kiss
roll and gravure roll methods in terms of uniformity of
coating, layer thinness and a range of coating speed. Further,
the coating method of an extrusion type can conduct
simultaneous multi-layer coating on the so-called wet-on-wet
basis, and it is extremely effective in terms of cost and
performance for the application to manufacture recent coated
products with high value added. For attaining the multi-layer
system, on the other hand, there has been used a method to
form the aforesaid coated layers of a multi-layer type by
coating a coating solution and drying it for each layer on the
substrate to be coated, as disclosed in TOKKAISHO Nos. 51-119204,
52-51908 and 53-16604. In this method wherein steps of
coating and drying are repeated, however, there have been
problems that productivity is poor and it is difficult to make
the uppermost layer to be thin. So, TOKKAISHO Nos. 48-98803
and 61-111168 disclose manufacturing methods of a type of wet-on-wet
simultaneous multi-layer coating for magnetic recording
media. However, both methods represent a method wherein
coating solutions superposed in layers in advance are coated
on the aforesaid substrate to be coated which is supported on
a back roll and is running continuously, which has caused
problems that uneven and nonuniform coating tends to be caused
in the longitudinal coating direction because of insufficient
rotational accuracy of the back roll, a distance between a
substrate to be coated and the tip of a coater which can not
be narrowed makes high speed thin layer coating to be
difficult, and manufacture of optimum magnetic recording media
is difficult.
From the background stated above, there have been
proposed a method disclosed in TOKKAISHO No. 62-124631 to coat
the upper layer with a single layer extrusion coater on a
substrate to be coated that is not supported by a back roll
while a lower layer is wet, and coater heads disclosed in
TOKKAISHO No. 63-88080 and TOKKAIHEI No. 2-251265 each having
a slit from which two coating solutions are extruded. However,
the problem of this extrusion type coating method is that it
is impossible to thoroughly eliminate defects called the so-called
pencil lines which are caused in the coating direction
by foreign materials or dried coating solutions caught at the
tip of an edge of a coater.
When conducting coating between two support rolls
without conducting coating on a substrate to be coated that is
held firmly on a back roll, bending of the substrate to be
coated in its lateral direction and that in its longitudinal
direction become pressure distribution in the direction of the
coater, and become layer thickness distribution in the lateral
direction and that in the longitudinal direction, resulting in
the occurrence of serious deterioration of coating quality. On
the contrary, TOKKAIHEI Nos. 1-203075 and 6-254466 disclose a
method to counteract a twist of the substrate in its lateral
direction by changing a diameter of a support roll located
just in front of or just behind an extrusion coater, and
TOKKAIHEI No. 1-224071 discloses a method to make the twisted
portion to be uniform by providing a means to apply fluid
pressure from the reverse side of the twisted substrate to be
coated. However, it is difficult for the method of this type
to cope with a twist of several tens centimeters or less,
though it can cope with a twist with a larger cycle, and it is
substantially possible for the method to cope only with a
twist with a cycle of a few meters. Though there has been
proposed a method to uniformalize the amount of flowing
coating solution in the lateral direction by changing shapes
of a pocket portion and of a slit portion of an extrusion
coater in the lateral direction as in TOKKAIHEI No. 6-508571,
in addition to the foregoing, no effect is expected for the
twist which fluctuates cyclically in the longitudinal
direction as stated above.
As a countermeasure for the drawbacks mentioned above,
there is disclosed in TOKKAISHO No. 6320070 an extrusion type
coater for coating by letting a coating solution layer fall
from a coater provided with its outlet facing downward while
holding a substrate to be coated on a back roll, wherein
pressure loss is lowered by using a coating apparatus whose
slit is gradually narrowed toward the coating solution outlet,
and thereby, coating of a solution having relatively high
viscosity is made to be possible even through a slit which is
relatively narrow. However, under the structure wherein the
tip portion is gradually narrowed, pressure is too high when
conducting high speed coating and when coating a coating
solution with high viscosity, and it is impossible to
thoroughly eliminate the problems that layer thickness
distribution is not uniform because accuracy of a sharp edge
portion at the tip is not obtained, and pencil lines are
caused because a distance between the tip portion of a coater
and a substrate to be coated is not actually broadened very
much as in other extrusion type coaters.
Objects of the invention are to solve the problems of
the prior art stated above and to provide a coating method and
a coating apparatus wherein thin layer coating that is free
from an influence of a twist of a substrate to be coated and
from the occurrence of pencil lines caused by surrounding dust
or by condensed products in a coating solution is made
possible without being restricted by the coating speed, while
making the most of advantageous points of an extrusion type
coating system.
The objects stated above can be attained by the
following coating apparatus.
A coating apparatus having the following structure:
Further, the objects mentioned above are attained by a
preferable embodiment shown in either one of the following
structures (1) - (18).
An embodiment of the invention will be explained with
reference to the side sectional view of the coater in Fig. 1.
A base is conveyed upward from the lower portion in Fig.
1 by paired rollers representing a conveyance means for
conveying a base representing a substrate to be coated. A
coating solution is injected into a slit through an inlet of
the slit provided on a coater, then, it passes through the
inside of the slit including two confronting surfaces (a) and
(b), and is extruded through a slit outlet. Then, the coating
solution extruded through the slit outlet forms a film of
extruded coating solution between a portion where a coating
solution comes in contact with a base and the coater, whereby,
the film of extruded coating solution thus formed is coated on
the base.
The inventors of the invention found that no dust is
caught between the tip of a coater and a substrate to be
coated, resulting in no occurrence of streak defects, and a
substrate to be coated, when it is flexible, does not affect
the coating, and thereby thin-layer coating is possible, when
extruding a coating solution in a shape of an extremely thin
layer by narrowing slit outlet clearance d of the coater to 50
µm or less, preferably 18 µm or less which is much narrower
than that of the conventional extrusion type coater, and
thereby coating by colliding the extruded coating solution
film with a substrate to be coated which is conveyed or held
to be away from the coater by the distance that is greater
than that for the conventional extrusion type coater. It has
also been cleared in this coating method that coating can be
carried out independently of the coating speed once an
extruded solution layer is formed, and the higher the coating
speed is, the thinner the solution layer is, resulting in a
thinner layer coating.
As a result of intensive studies for conditions which
make it possible to coat to be thinner than that of the
conventional coater, excepting the higher speed, the relation
of Hw x U = Q holds in the coating method of the invention
when Q (m3 /m · min ) represents an amount of extruded coating
solution per a unit width to a substrate to be coated, Hw (m)
represents a wet coating thickness of a coated layer, and U
(m/min) represents conveyance speed for a substrate to be
coated, and it is preferable to lower amount of extruded
coating solution Q for thin layer coating. Namely, it is
preferable either to lower the speed for extruding a coating
solution or to lower the thickness of an extruded layer. It
has also been found that it is preferable to make a coater to
repel a coating solution and to make the coating solution to
tend to leave the coater, by constituting a portion where the
coater comes in contact with a coating solution with a member
whose contact angle for a coating solution is large, or by
mirror-finishing the surface of the portion. There are given a
method to water-repellent-finish at least a portion of two
confronting surfaces (a) and (b) of the slit, preferably to
water-repellent-finish a portion that is closest to the outlet
among (a) and (b) surfaces, and a method to form a portion of
two confronting surfaces (a) and (b) of the slit with a water
repellent member, preferably to form a portion that is closest
to the outlet among (a) and (b) surfaces with a water
repellent member. In this case, it is preferable that a
contact angle of at least a portion of the two confronting
surfaces (a) and (b) is 45° or more. It is also possible to
attain by making surface roughness Rmax to be 0.8 µm or more.
Even in this case, the surface roughness on the portion which
is the same as the place for water repellent finishing can
take the aforesaid value.
When a contact angle between a coater and a coating
solution is 45° or more, water repellency is satisfactory and
a thin extruded layer can be formed. However, when activators
are added in a coating solution for the low surface tension or
when a coating solution is of a solvent type, the surface
tension of the coating solution itself is low and repellency
is poor. Therefore, it is necessary to make the coater surface
tension to be lower.
A portion where a coating solution comes in contact with
a coater is enough as a place on the coater where a coating
solution is repelled, and in particular, a fall of the speed
of a running coating solution caused by the contact with a
slit surface can be lessened at the portion where the slit
clearance is smallest in the vicinity of an outlet of a slit
which is a path for a coating solution to run out, which is
effective because a thin extruded layer can easily be formed.
Further, giving water repellency to the place near an edge
section where a solution leaves a coater and starts jetting is
also effective for forming of a thin extruded layer.
Means to cause a coater to repel a coating solution
include a method to constitute a coater with highly repellent
ceramic, Teflon resin, silicone resin and acrylate resin, a
method of coating of other silicone type resins such as
fluorine type one and silane, and a method of mirror finishing
by means of grinding such as buffing and lapping. However, the
invention is not limited to the aforesaid methods, and can
employ any method provided that the method can offer the same
effect.
When a coater is made of a metal, in particular, it is
almost possible to make a contact angle to be 45° or more by
making surface roughness Rmax to be 0.8 µm or less, preferably
to be 0.1 µm or less, in a surface grinding method.
An effect of the invention can be obtained also on a
coater for the so-called multi-layer coating which is
structured with three bars or more and has two or more slits.
In that case, the invention can be applied naturally to a
front edge located at the uppermost stream side and a back
edge located at the extremely downstream side on the coater
for a substrate to be coated, and can be applied even to one
or more center edges located between the front edge and the
back edge.
In the invention wherein the tip of a coater is
completely away from a substrate to be coated, pressure
distribution caused by bending and twist does not occur even
when the substrate to be coated is flexible, and coating
thickness which is extremely uniform can be obtained. In the
invention, excellent coating can be conducted without using a
back roll if the twist of a substrate to be coated is
corrected to a certain extent by relatively high tension,
though it is preferable to spread a flexible substrate to be
coated in the vicinity of the coating portion by using a back
roll.
In the case of a high viscosity solution, slit
resistance in a narrow outlet clearance of a slit like that in
the invention is extremely high, namely, pressure loss is
great, which requests fluid-forwarding pressure that is
extremely great, and a liquid-forwarding means such as a gear
pump used commonly has caused a fall of the amount of flowing
solution, pulsation and pump troubles. As a measure to solve
this problem, it is effective to attain the slit form wherein
the slit clearance is gradually reduced in the direction from
a slit inlet to a slit outlet by broadening the clearance of a
slit on the part of an inlet for a coating solution instead of
narrowing the clearance of a slit on the part of an outlet.
For the thin layer coating, slit clearance on the part of an
outlet of 50 µm or less is required, and that of 18 µm or less
is preferable, and in that case, it is preferable to make the
slit clearance on the part of an inlet to be a broad clearance
of 100 µm or more, taking a fall of pressure into
consideration.
As a method for this reduction stated above, the gradual
reduction by tapering has been employed for forming. In this
method, however, the tip portion of a coater becomes a sharp
edge at the slit outlet, and in the case of a coater for
single-layer coating, for example, it has been difficult to
process accurately the height between the tip on the part of a
front bar and the tip on the part of a back bar and
parallelism, which has worsened coating thickness distribution
in the direction of a coating width. However, when a portion
where a slit surface of a front bar and a slit surface of a
back bar are in parallel with each other without being tapered
is provided at the position of an outlet of a slit, processing
is easy and accuracy of straightness is improved, an extruded
layer which is more uniform can be formed, and distribution of
coating thickness in the coating width direction can be made
excellent.
It has been cleared that when abrasives and metal powder
are contained in a coating solution under the condition that a
slit clearance on the part of an outlet is made to be narrower
than that in a conventional extrusion type coater, the
abrasives and metal powder grind and roughen an inner wall of
the slit while they are flowing at high speed through the
inside of the slit, causing deteriorated distribution of
coating thickness and streak defects, to shorten life of the
coater. However, it has been found, in terms of slit materials,
that the problem stated above can be prevented by using a
member having high hardness on the portion where the slit
clearance in the vicinity of the slit outlet is narrowest. The
hardness which represents Vickers hardness of 280 or more in
practical use is sufficient, though it depends on a coating
solution to be used. Although it is preferable that all
surfaces of the slit are constituted with members having this
hardness, it is also acceptable in practical use that only
parallel portions in the slit outlet where the slit clearance
is narrow are constituted with a member having Vickers
hardness of 280 or more. Further, even when only the parts of
the aforesaid parallel portions which are closest to the slit
outlet are constituted with a member having Vickers hardness
of 280° or more, deterioration of coating thickness
distribution and streak defects cause by grinding and
roughening can be prevented to a certain extent. This method
can attain cost reduction when processing for higher hardness
is expensive. It is preferable for its purposes that both slit
surfaces of two bars structuring one slit are constituted with
a member having Vickers hardness of 280° or more.
A coating apparatus or a coating method of the invention
is naturally effective for direct coating on a substrate to be
coated such as a flexible support such as PET, TAC, PEN, paper
and aluminum plate and non-flexible support such as a glass
plate, and is also capable of being applied even when coating
a coating solution indirectly on a coating roll or a belt and
transferring them onto a support. It is also possible to coat
on a substrate which relatively lacks flatness.
A slit was reduced at a step at d = 40 µm and slit
surfaces in the vicinity of outlet were parallel.
Distance between the coater and a substrate to be coated:
0.3 mm
| Co-γ-Fe2O3 (Hc:900 oersted, BET value: 45 m2/g) | 10 parts |
| Diacetyl cellulose | 100 parts |
| α-alumina (average particle size: 0.2 µm) | 5 parts |
| Stearic acid | 3 parts |
| Carnauba wax | 10 parts |
| Cyclohexanone | 100 parts |
| Acetone | 200 parts |
Under the conditions described above, materials of a
member of a coater contacting a solution were changed
variously, and coating thickness and distribution of coating
thickness for various coating speeds were measured to confirm
the limit of thin layer coating.
Table 1 shows the results of the example stated above.
As a result, thin layer coating was possible when water
repellency was given to the coater, and coating thickness
distribution proved to be excellent.
In the case that the coating speed was 100 m/min., on
comparison with the conventional type coater, by the coater
whose edge surface is made of Teflon resin according to the
present invention, for example, the lower limit thickness of
coating layer was made thinner to the thickness of 7 µm.
Further, the coating layer thickness distribution was improved
to 1%. This improvement in the coating layer thickness
distribution is the appreciable effect of the present
invention.
Incidentally, under all conditions, neither streak
defect nor coating mottle was caused, resulting in excellent
results.
When coating conditions were established based on
expressions of the invention, coating was not adversely
affected by partial slackness or twist of a substrate to be
coated, and it was possible to coat thin layer at high speed
stably in a coating method which is free from streak defects.
Further, by employing a coater slit shape of the invention, it
was possible to obtain uniform coating thickness easily.
Further, since the distance between the coater and the
substrate to be coated is relatively large, roundness of a
back roll, fluttering and twist of a substrate to be coated,
straightness and bending of the coater tip hardly affect the
coating thickness adversely. Whereby accuracy of them has
nothing to do with coating, and reduction of apparatus cost,
easy management and easy operation and work have been realized.
Claims (11)
- A coating apparatus, comprising:conveyance means for conveying a substrate to be coated;a coater including two surfaces opposite to each other so that a slit is formed therebetween, wherein a coating solution is introduced from an inlet of the slit, passes through the slit between the two surfaces and is discharged from the outlet of the slit,the gap distance d of the slit at the outlet being made so as to satisfy the following formula:at least a part of the outlet section of the two surfaces being formed by a member having a water-repelling property.
- The coating apparatus of claim 1, wherein the contact angle of the part of the outlet section of the two surfaces is 45° or more.
- The coating apparatus of claim 1, wherein the roughness (Rmax) of the part of the outlet section of the two surfaces is 0.8 µm or more.
- The coating apparatus of claim 1, wherein the gap distance of the slit at the outlet is made narrower than that at the inlet.
- The coating apparatus of claim 4, wherein the slit has on its outlet section a section where the two surfaces are parallel to each other.
- The coating apparatus of claim 4, wherein the narrowest portion of the slit is constructed with a member whose Vickers hardness is 280 or more.
- The coating apparatus of claim 1, wherein a predetermined portion of the surface of the coater which comes in contact with the coating solution is constructed with at least one kind of metal, ceramic, resin and glass.
- The coating apparatus of claim 1, wherein a predetermined portion of the surface of the coater which comes in contact with a coating solution is given a repelling property by a covered layer.
- The coating apparatus of claim 3, wherein a predetermined portion of the surface of the coater which comes in contact with a coating solution is covered with a member whose surface roughness Rmax satisfies the relation of Rmax ≤ 0.8 (µm).
- The coating apparatus of claim 8, wherein the predetermined portion of the surface of the coater is covered with at least one kind of fluorocarbon resin, silicon type resin and ceramic.
- A coating apparatus, comprisinga coater including two bars forming a slit therebetween;a conveyor for conveying a substrate to be coated in the vicinity of the coater such that a predetermined gap distance is kept between the substrate and the outlet of the sit; andjetting means for jetting a coating solution in the form of a layer from the outlet of the slit through the gap onto the substrate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP232698A JPH11197576A (en) | 1998-01-08 | 1998-01-08 | Coater and coating method |
| JP232698 | 1998-01-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0928636A2 true EP0928636A2 (en) | 1999-07-14 |
| EP0928636A3 EP0928636A3 (en) | 2000-05-03 |
Family
ID=11526202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99100089A Withdrawn EP0928636A3 (en) | 1998-01-08 | 1999-01-05 | Coating apparatus |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0928636A3 (en) |
| JP (1) | JPH11197576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007093342A1 (en) * | 2006-02-14 | 2007-08-23 | Dsm Ip Assets B.V. | Process for coating a glass plate |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4831448B2 (en) * | 2001-02-19 | 2011-12-07 | 大日本印刷株式会社 | Coating equipment |
| JP4601918B2 (en) * | 2003-05-30 | 2010-12-22 | 大日本印刷株式会社 | COATING DIE HEAD, COATING DEVICE, AND METHOD FOR PRODUCING COATING DIE HEAD |
| JP3838990B2 (en) * | 2003-04-14 | 2006-10-25 | 東京応化工業株式会社 | Slit nozzle and treatment liquid supply apparatus using the slit nozzle |
| JP2005131635A (en) * | 2003-10-07 | 2005-05-26 | Konica Minolta Medical & Graphic Inc | Coating device and method of fabricating die coater |
| JP2005152885A (en) * | 2003-10-27 | 2005-06-16 | Tokyo Ohka Kogyo Co Ltd | Slit nozzle |
| KR100782539B1 (en) * | 2006-06-15 | 2007-12-06 | 세메스 주식회사 | Slit nozzle and chemical-coating apparatus having the same |
| CN111013946B (en) * | 2019-12-18 | 2021-04-06 | 库卡机器人制造（上海）有限公司 | Fixed point position acquisition method of gluing robot and gluing robot |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4898803A (en) | 1972-02-24 | 1973-12-14 | ||
| JPS51119204A (en) | 1975-04-11 | 1976-10-19 | Fuji Photo Film Co Ltd | Magnetically recording element |
| JPS5251908A (en) | 1975-10-23 | 1977-04-26 | Fuji Photo Film Co Ltd | Magnetic recording tape |
| JPS5316604A (en) | 1976-07-30 | 1978-02-15 | Fuji Photo Film Co Ltd | Double layered magnetic recording medium |
| JPS61111168A (en) | 1984-11-06 | 1986-05-29 | Konishiroku Photo Ind Co Ltd | Method and device for coating |
| JPS62124631A (en) | 1985-11-26 | 1987-06-05 | Fuji Photo Film Co Ltd | Coating method for magnetic recording medium |
| JPS6388080A (en) | 1986-09-30 | 1988-04-19 | Fuji Photo Film Co Ltd | Coating applicator |
| JPH01203075A (en) | 1988-02-08 | 1989-08-15 | Konica Corp | Applicator of magnetic recording medium |
| JPH01224071A (en) | 1988-03-04 | 1989-09-07 | Konica Corp | Coater |
| JPH02251265A (en) | 1989-03-20 | 1990-10-09 | Konica Corp | Coating apparatus |
| JPH06254466A (en) | 1993-03-05 | 1994-09-13 | Sony Corp | Coating device |
| JPH06320070A (en) | 1993-05-06 | 1994-11-22 | Asahi Sanac Kk | Continuous feeder for conductive coating material in electrostatic coating device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS498099B1 (en) * | 1969-09-26 | 1974-02-23 | ||
| JPS5784771A (en) * | 1980-11-13 | 1982-05-27 | Fuji Photo Film Co Ltd | Coater |
| US5336322A (en) * | 1992-03-06 | 1994-08-09 | Konica Corporation | Coating apparatus |
| JPH07256188A (en) * | 1994-03-25 | 1995-10-09 | Tdk Corp | Extrusion coating applying head |
| DE19605899A1 (en) * | 1996-02-17 | 1997-08-21 | Basf Magnetics Gmbh | Device for applying magnetizable binder-containing layers to a nonmagnetic substrate by means of an extruder caster |
-
1998
- 1998-01-08 JP JP232698A patent/JPH11197576A/en active Pending
-
1999
- 1999-01-05 EP EP99100089A patent/EP0928636A3/en not_active Withdrawn
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4898803A (en) | 1972-02-24 | 1973-12-14 | ||
| JPS51119204A (en) | 1975-04-11 | 1976-10-19 | Fuji Photo Film Co Ltd | Magnetically recording element |
| JPS5251908A (en) | 1975-10-23 | 1977-04-26 | Fuji Photo Film Co Ltd | Magnetic recording tape |
| JPS5316604A (en) | 1976-07-30 | 1978-02-15 | Fuji Photo Film Co Ltd | Double layered magnetic recording medium |
| JPS61111168A (en) | 1984-11-06 | 1986-05-29 | Konishiroku Photo Ind Co Ltd | Method and device for coating |
| JPS62124631A (en) | 1985-11-26 | 1987-06-05 | Fuji Photo Film Co Ltd | Coating method for magnetic recording medium |
| JPS6388080A (en) | 1986-09-30 | 1988-04-19 | Fuji Photo Film Co Ltd | Coating applicator |
| JPH01203075A (en) | 1988-02-08 | 1989-08-15 | Konica Corp | Applicator of magnetic recording medium |
| JPH01224071A (en) | 1988-03-04 | 1989-09-07 | Konica Corp | Coater |
| JPH02251265A (en) | 1989-03-20 | 1990-10-09 | Konica Corp | Coating apparatus |
| JPH06254466A (en) | 1993-03-05 | 1994-09-13 | Sony Corp | Coating device |
| JPH06320070A (en) | 1993-05-06 | 1994-11-22 | Asahi Sanac Kk | Continuous feeder for conductive coating material in electrostatic coating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007093342A1 (en) * | 2006-02-14 | 2007-08-23 | Dsm Ip Assets B.V. | Process for coating a glass plate |
| CN101384923B (en) * | 2006-02-14 | 2011-03-02 | 帝斯曼知识产权资产管理有限公司 | Process for coating a glass plate |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0928636A3 (en) | 2000-05-03 |
| JPH11197576A (en) | 1999-07-27 |
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