baber/WOPTO huggingface dataset:
Patent EP-0135667-A3 (EP)
Title: Method and apparatus for reducing the pressure in blast furnace charge hoppers to nearly atmospheric pressure by simultaneous top gas recovery
IPC: C21B7/18
Filed: 1984-05-15
Abstract: 1. A method for reducing the pressure in blast furnace charge hoppers to nearly atmospheric pressure with residual pressure relief by way of silencers into the atmosphere and simultaneous top gas recovery, characterised in that the quantity of relieved gas is intermediately stored in a float tank (7) and is cleaned of dust therein.
Patent EP-0138256-A3 (EP)
Title: Liquid level gauge
IPC: G01F23/42
Filed: 1984-09-20
Abstract: A liquid level gauge comprises a sensor adapted to cooperate with the liquid and suspended on a measuring cable or measuring tape, which is wound on a rotatable drum. A torque is exerted to the drum by a spring means, said torque being opposed to the torque exerted by the sensor on the drum. The drum is rotatable to substantially balance said torques. A stabilizer weight is inserted in the measuring cable or the measuring tape at a relatively short distance above the sensor.
Patent EP-0118202-A3 (EP)
IPC: B05B9/043
Filed: 1984-02-01
Abstract: Apparatus, particularly electrostatic spraying apparatus, 
comprising a container and an enabling device wherein the 
container has a discharge valve that is held in the closed 
position by sprung member(s) that can be urged out of 
engagement, so as to permit valve actuation, upon connec­
tion of the enabling device to the container.
Patent EP-0132061-A3 (EP)
IPC: C10J3/52
Filed: 1984-06-22
Abstract: An air classifier system for classifying bed particles inclu­
des a drop tube (9) leading from a reaction chamber (2) and 
communicating with a discharge tube (12) in which is located 
a gas ejector (16). The classifier (18) in which air is used as an 
aerodynamic sieve to entrain particles of an acceptable size 
for return through the conduit (14) to the bed (4). Oversize 
particles descend through the classifier (18) for discharge into 
a receptacle (28).
Patent EP-0142274-A3 (EP)
Title: Cephalosporin compounds and salts thereof, their production, and medicaments containing them
IPC: C07D417/12
Filed: 1984-10-11
Abstract: Antibacterial compounds of formula (I), and salts thereof: 
  
wherein the wavy line represents syn-form or anti-form bond;  
R¹ represents a cyanomethyl group, a thiocarbamoyl­
methyl group or an aminothiazolylmethyl group; and A rep­
resents 
  
where n is 1 or 2,  
R² represents a hydrogen atom, a sulfo group, 
-(CH₂) m COOH, -(CH₂) m OH, -(CH₂) m NHR³, or -CONHR⁴ (where 
m represents 0 or an integer of 1 to 3, R³ represents a hyd­
rogen atom or an acyl group, and R⁴ represents a carboxy alkyl 
group or a hydroxyl group).
Patent EP-0142350-A3 (EP)
Title: Crystalline zeolite composition ecr-2 and process for its preparation
IPC: B01J29/60
Filed: 1984-11-09
Abstract: A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range:wherein M is at least one exchangeable cation, n is the valence of M. and x is 0 to 6, and characterized by having a specified x-ray powder diffraction pattern. The zeolite may be prepared by crystallization from a reaction mixture of KOH (and optionally a minor amount of NaOH), water, a source of silica, and a source of alumina preferably derived from kaolin or halloysite. Most preferably, the source of alumina is metakaolin and the source of silica is potassium silicate.
Patent EP-0161592-A3 (EP)
IPC: G03F7/00
Filed: 1985-05-03
Abstract: Es wird ein lichtempfindliches Aufzeichnungsmaterial für 
die Herstellung von Flachdruckplatten beschrieben, das aus 
einem Schichtträger und einer negativ arbeitenden lichtemp­
findlichen Schicht besteht, die als lichtempfindliche Verbin­
dung ein Diazoniumsalz-Polykondensationsprodukt und ferner 
ein farbloses, in Wasser und organischen Lösungsmitteln un­
lösliches anorganisches Pigment mit einem mittleren Teilchen­
durchmesser von 1-20 µm in einer Menge von 0,01-2 Gew.%, 
bezogen auf die nicht flüchtigen Bestandteile der Schicht, in 
gleichmäßiger Verteilung enthält. Der Pigmentgehalt bewirkt 
die Ausbildung einer rauhen Schichtoberfläche, durch die die 
Vakuumanlegezeit im Kopierrahmen verkürzt wird. Die Anwe­
senheit des Pigments in der Schicht bewirkt ferner eine bes­
sere Tonwertwiedergabe im Druck.
Patent EP-0188653-A3 (EP)
Title: Connecting passage for at least one conduit, as a pipe, a cable or the like, through an opening in a wall
IPC: H02G3/22
Filed: 1985-06-14
Abstract: 1. Duct for at least one line, such as a pipe, cable or the like (1) through a wall aperture (2), having at least two sealing bodies (4) sealing the wall aperture (2) on both sides relative to the line (1) on the one hand and the soffit (13) of the wall aperture on the other hand, and having a flame-protection agent inserted into the space between the sealing bodies (4), the soffit (13) and the line (1), characterised in that a flame-protection agent, which decomposes by absorbing heat (endogenous) when heated in the case of fire and releases a flame-preventive protection gas, is present in the form of a granulated to powdered solid and is filled into deformable packing units (14), which are small in comparison to the dimensions of the space, and in that the space is completely packed with these packing units.
Patent EP-0168717-A3 (EP)
Title: Process for producing formed fibrous bodies having a limited elastic comportment
IPC: C04B30/02
Filed: 1985-07-03
Abstract: 1. Method for producing moulded ceramic fibrous bodies of ceramic fibres containing aluminium oxide, by means of : a) mixing the fibres in water, d) admixing an aqueous suspension of freshly precipitated aluminium hydroxide gel, f) pouring off in filter-moulds, h) drying and i) calcining, characterised in that an aqueous suspension of freshly precipitated silicic acid is additionally mixed with the aluminium hydroxide suspension.
Patent EP-0177023-A3 (EP)
IPC: A61K51/04
Filed: 1985-10-01
Abstract: A substance-conjugated complement component C1q is 
provided. A substance such as signal emitting substances or 
cell function regulating substances is conjugated via a sulfur 
atom to at least one site of the component. The site is not 
involved in binding immunoglobulins. A marker-labelled 
complement component C1q is used for measuring a 
complement-binding antibody, an antigen, a neutralizing 
antibody or a substance produced internally of and at the 
surface of a cell or a microorganism by measuring the 
marker.
Patent EP-0188760-A3 (EP)
IPC: G02B26/10
Filed: 1985-12-18
Abstract: Zur optischen Gegenstandsabtastung einer Gegen­
standszeile (8) mittels einer fotoelektrischen Sensorzeile (4) 
und einer Abbildungsoptik (7) ist vor der Sensorzeile (4) und 
parallel zu dieser eine Zylinderlinse (6) angeordnet. Die 
Zylinderlinse (6) bewirkt eine optische Integration in einer 
Richtung quer zur Abtastrichtung unter Beibehaltung einer 
hohen optischen Auflösung in Abtastrichtung.
Patent EP-0178029-A3 (EP)
IPC: C11D3/00
Filed: 1985-10-09
Abstract: Detergent compositions, preferably liquid compositions 
which are substantially free of polyphosphate builders, containing 
surface-active agents, and low level of a detergent compatible 
organic emetic agent are disclosed.
Patent EP-0158516-A3 (EP)
IPC: A01G25/09
Filed: 1985-04-04
Abstract: A wheeled carriage comprises a frame member (12), two 
independently swiveling ground-engaging wheels (15) 
mounted spaced apart below the frame member (12), and at 
least one pipe support member (16) mounted below the 
frame member (12) for pivotting about a substantially 
horizontal axis transverse a notional line joining the swivel 
axes of the wheels (15). The pipe support member (16) is 
adapted to support a pipe (10) between the wheels (15). The 
carriages are used to form a pipe train comprising a series of 
connected pipe sections (10) supported by a plurality of 
wheeled carriages connected together in pairs by pivotal link 
bars (23) bridging the frame members (12) of connected 
pairs of cartridges, the pipe sections (10) being flexibly 
connected together (11, 24) between connected pair of car­
riages.
Patent EP-0155923-A3 (EP)
IPC: A01G31/02
Filed: 1985-03-18
Abstract: A device (1) for producing plant germs and/or sprouts 
comprises a container (2) open at one end thereof, and a 
perforated cover means (3) adapted to fit the open end of the 
container. The cover means (3) has a conical shape, with the 
cone apex arranged to face in towards the container (2). The 
cone surface (5) facing away from the container comprises a 
plurality of concentrically related edge portions (5a, 5b) 
having mutually adjacent edge portions formed by surfaces 
diverging from the container and intermediate edge portions 
formed with holes or slots.
Patent EP-0191431-A3 (EP)
Title: Method for rapid acquisition of spin resonance data for a space-resolved examination of an object
IPC: G01N24/08
Filed: 1986-02-07
Abstract: A fast low angle shot ("FLASH") NMR method is described, which uses radio frequency excitation pulses having a flip angle substantially less than 90 degrees, and subsequent reading gradient reversal for producing a gradient echo signal. The small flip angle pulses create an equilibrium state between longitudinal and transverse magnetization, which allows to apply the radio frequency pulses repeatedly with high repetition rate to produce gradient echo signals of essentially equal strength, without any intervening delay for magnetization restoration or recovery.
Patent EP-0193754-A3 (EP)
Title: Mechanical fuel injection
IPC: F02M69/00
Filed: 1986-02-11
Abstract: 1. Mechanical fuel injection for an internal combustion engine having a fuel pump, a fuel accumulator, a mixture regulator (22) with fuel distributor (40) which opens a fuel supply to injection valves (17, 32, 44) by means of a displacement, controlled by the airflow sensor (24), through built-in metering slits, a cylinder injection valve (17) being associated with each cylinder of the internal combustion engine, having a central injection valve (32) for the cold-start enrichment and an airflow sensor (24) associated with the mixture regulator, said airflow sensor controlling the fuel distributor (40), characterized in that a further fuel central injection valve (44) is provided in a suction tube section (14) common to all cylinders, of the internal combustion engine, said suction tube section being supplied in the idling mode with a predeterminable amount of fuel, and in that the metering slits for the cylinder injection-valves (17) are completely closed in the idling mode and an additional metering slit for the central injection valve (44) is provided, said metering slit opening at least in the idling mode.
Patent EP-0208226-A3 (EP)
IPC: C08L67/00
Filed: 1986-06-30
Abstract: Aqueous urethanes having improved physical properties 
in addition to excellent flame retardant properties are 
obtained when a combination of a halogenated diol, such as 
an alkoxylated tetrabromobisphenol A, or dibromoneopentyl 
glycol and a second diol which contains either a carboxy 
group, a sulphonate group or a tertiary amine group is 
incorporated in the urethane.
Patent EP-0208295-A3 (EP)
IPC: H01H71/43
Filed: 1986-07-08
Abstract: A circuit breaker characterized by a pair of separable con­
tacts, one of which is carried by a movable contact arm, mov­
able within an arc chute having arc plates including a lower 
arc plate adjacent to the other contact. A link conductor leads 
to the other contact and electrically connected to the other 
contact.
Patent EP-0220399-A3 (EP)
Title: Method of manufacturing tiffany-type lamp shades, and apparatus for carrying out the method
IPC: F21V1/20
Filed: 1986-08-06
Abstract: The method enables the glass fragments (11, 11') to be reliably secured by a simple manipulation as they are being processed. This purpose is served by a shielding mould (2) made from a hard PU foam, in which contour fields (3) are formed on which the glass fragments (11, 11') can be glued and then joined to one another by soldering. The glued joint can be undone by heating. Due to the contour lines impressed in the shielding mould (2), the contour fields (3) are always clearly visible and moreover the shielding mould (2) can be retained and repeatedly used. <IMAGE>
Patent EP-0217178-A3 (EP)
IPC: C08F2/38
Filed: 1986-09-08
Abstract: A vinyl polymer having alkoxysilyl groups at both 
terminals of the formula: 
  
wherein R¹ and R² are the same or different and are each an 
alkyl having 1 to 4 carbon atoms, R³ is an alkylene having 1 
to 4 carbon atoms, n is an integer of 0 to 2, Z is at least 
one group of the formulae: 
  
(wherein R⁴ is hydrogen or methyl, Y¹ is an ester residue 
having 2 to 11 carbon atoms, phenyl or a halogen, Y² is an 
ester residue having 2 to 6 carbon atoms or a halogen, and 
Y³ is fluorine or chlorine atom), m is 10 to 10,000, which 
has excellent physical strength and is useful as an 
ingredient for paints, adhesives, sealing agents, and 
tacking agents, and an intermediate therefor, and a process 
for the production thereof.
Patent EP-0222254-A3 (EP)
IPC: C07D413/04
Filed: 1986-10-28
Abstract: Die Erfindung betrifft neue Nicotinsäurederivate der Formel (I), 
 in welcher X für Hydroxy, Alkoxy 
oder den Rest -OM steht, wobei M für ein Alkali- oder 
Erdalkaliionenäquivalent oder ein gegebenenfalls substituiertes 
Ammoniumion steht, und Het für jeweils substituiertes 
Isoxazolyl, Pyrimidinyl oder Pyrazolyl steht, mehrere Verfahren zu 
ihrer Herstellung und ihre Verwendung als Herbizide 
sowie neue Zwischenprodukte.
Patent EP-0261277-A3 (EP)
IPC: B42D5/04
Filed: 1986-11-11
Abstract: Standkalender werden üblicherweise aus Pappe oder 
gespritztem Kunststoff hergestellt. Diese unterscheiden sich 
voneinander erheblich, und zwar durch die Haltbarkeit, das 
Aussehen und die Herstellungskosten. Bei der Erfindung geht 
es nun um die Schaffung eines haltbaren, ästhetisch an­
sprechenden, aber gleichwohl preisgünstig herzustellenden 
Kalenderständer. Dieser besteht aus einer geschlossenen 
Hülle (12) mit einer Deckwand (13) und einer Rückwand (14) 
zur Aufnahme des Kalenders (11). Die Herstellung der Hülle 
(12) erfolgt im Tiefziehverfahren, und zwar aus einem 
einzigen Zuschnitt.
Patent EP-0195765-A3 (EP)
IPC: H01C1/01
Filed: 1986-03-19
Abstract: This invention relates to a method of suspending 
electrical resistance elements in industrial furnaces in the 
first place. Suspension on fibre board, i.e. blocks or boards of 
fibre material, according to the invention eliminates heat 
dissipation to the outer walls of the furnace and gives a 
simple suspension of the elements. The elements (1) are 
hooked onto profiles (2) which are stuck into the fibre blocks 
(3). The profiles are suitably manufactured in the same 
material as the resistance elements and are fixed in the fibre 
blocks without any previous making of holes.
Patent EP-0230269-A3 (EP)
IPC: B60J3/02
Filed: 1987-01-15
Abstract: Die beschriebene Sonnenblende weist einen auf Kunststoffschaum 
bestehenden Sonnenblendenkörper (1) auf, in dem eine aus 
zwei Drahtabschnitten (8, 11) bestehende Verstärkungseinlage, ein 
Lagergehäuse (3) und ein Gegenlagerstift (7) eingelagert 
sind. Das Lagergehäuse (3) weist eine Stecköffnung (9) und 
Steckaufnahmen für jeweils einen Endbereich der Drahtabschnitte (8, 
11) sowie eine Stecköffnung (12) für die Aufnahme einer anderendig in 
eine Stecköffnung (30) eines Lagerbocks (31) 
eingriefende Sonnenblendenachse (15) und einer Feder (13) auf. Der 
Gegenlagerstift (7) ist ebenfalls mit Stecköffnungen (10, 
33) für die Aufnahme der anderen Endbereiche der Drahtabschnitte (8, 
11) ausgebildet. Die Feder (13) wird durch den 
Drahtabschnitt (8) in der Steckaufnahme (12) gehalten.
Patent EP-0230921-A3 (EP)
IPC: B29L31/00
Filed: 1987-01-16
Abstract: The invention relates to a method and an apparatus 
for producing insulations (14) of foamed plastic 
material, in cabinets and doors of refrigerators, 
freezer and the like (10).  
     According to the invention, a metered quantity of 
a foamable mixture (14) is fed into the gaps bet­
ween inner and outer walls (11, 12) of a cabinet 
or door (10), placed in a foaming jig (16); the foaming 
process is controlled by sensing characteristic 
parameters, for example, the temperature of the 
jig (16), cabinet or door (10), or the pressure 
of the foaming plastic material, comparing them 
with reference parameters or data stored in a da­
ta processing unit (26). A control signal is gene­
rated to open the foaming jig (10) and to demold 
the cabinet or door (10) when at least one of the 
processing parameters has reached a pre-established 
value. The metered quantity of mixture fed in each 
subsequent foaming operation is corrected each ti­
me according to the changes in the peak pressure 
of the foam (14) with respect to the previous fo­
aming operation.
Patent EP-0233502-A3 (EP)
IPC: E04G11/04
Filed: 1987-01-22
Abstract: A method and apparatus for anchoring an inflatable 
membrane form to the base wall of a building to be covered by 
a concrete shell incorporates a groove formation at the top 
inner face of the building base wall, the groove formation 
comprising a horizontal shelf of width W1, a recess of height 
H1 and width W2, and a vertical wall segment of height H2. 
The edge portion of an inflatable membrane form is wrapped in 
a multiplicity of elongated wood rail members of height H3 
and width W3, with H3<H1 and W1>W3>W2, and the rails are 
inserted into the groove formation recess. A multiplicity of 
elongated steel retainer plates of flat, open, C-shaped 
cross-sectional configuration, mounted on bolts projecting 
from the shelf portion of the groove formation, aid in 
holding the wrapped rails and form edge in place when the 
form is inflated.
Patent EP-0248208-A3 (EP)
IPC: H01B17/60
Filed: 1987-04-29
Abstract: A flame resistant electrically insulating 
multilayer material is described herein, in which a 
flame resistant core which may be comprised of 
coextrudable, thermoformable thermoplastic materials has 
at least one electrically insulating outer layer 
attached thereto. Preferred polymeric materials forming 
the core include blends of polycarbonates with 
halogen-containing polycarbonates. Each outer layer 
typically may be formed from polycarbonates and linear 
polyesters. The multilayer material may be shaped to 
surround and shield any sensitive device requiring 
protection from high voltage arcing or fire.
Patent EP-0257314-A3 (EP)
IPC: H04L12/50
Filed: 1987-07-24
Abstract: Für den Betrieb der betreffenden Vermittlungsanlage (EDS) 
vorgesehene Betriebsdaten sind in einem externen Betriebs­
datenspeicher (S1) gespeichert. Für ihre Aktualisierung 
steht ein Arbeitsspeicher (AS) der Vermittlungsanlage zur 
Verfügung. Aktualisierte Betriebsdaten werden dabei vor 
einer Übertragung zu dem Betriebsdatenspeicher (S1) hin 
in einen Zwischenspeicher (S2) kopiert. Der Zwischenspei­
cher wird daraufhin bis zur Übernahme der aktualisierten 
Betriebsdaten in den Betriebsdatenspeicher (S1) durch ein 
Belegtkennzeichen als mit Betriebsdaten belegt gekennzeich­
net. Bei Auftreten einer Betriebsstörung in der Vermittlungs­
anlage werden im Falle des Vorliegens eines Belegtkennzei­
chens für den Zwischenspeicher (S2) die in diesem zwischen­
gespeicherten aktualisierten Betriebsdaten über den genann­
ten Arbeitsspeicher in den Betriebsdatenspeicher (S1) einge­
speichert. Im Falle des Nichtvorliegens eines Belegtkennzei­
chens werden dagegen die in dem Betriebsdatenspeicher (S1) 
eingespeicherten Betriebsdaten als aktuelle Betriebsdaten 
genutzt.
Patent EP-0270857-A3 (EP)
IPC: H04R1/02
Filed: 1987-11-09
Abstract: Erfindungsgemäß wird eine einfache, handliche, 
raumsparende, zusammenfaltbare sowie leicht­
gewichtige Kopfhörer-Kopfkissenkombination geschaffen, 
welche eine aufblasbare Einrichtung zur Anordnung einer 
Schallquelle, z.B. einem Kleinlautsprecher, in eine von 
der benutzenden Person einstellbare Gebrauchslage 
aufweist, wobei als aufblasbare Einrichtung eine 
Kombination mit einem aufblasbaren Kopf-Auflagekissen 
ermöglicht wird.
Patent EP-0255300-A3 (EP)
IPC: G01B11/16
Filed: 1987-07-24
Abstract: A high sensitivity strain detector is provided for 
the measurement of strain in material surrounding a bore 
hole. The strain gauge acts to detect small changes in 
the diameter of the bore hole which might for instance be 
drilled in a rock wall face in order to determine its 
strain.  
     The detector includes a tubular housing (21) which is 
sized to fit neatly in a standard bore hole (23). 
Included in at least one transverse plane is a pair of 
coaxial probes (24) extending externally to the bore hole 
wall (23) and internally connected to overlapping glass 
plates (25) marked with diffraction gratings. The 
diffraction grating of each plate comprises a series of 
equally spaced parallel lines being slightly angled to the 
diffraction grating of the other plate. A light source 
(30) and line camera (31) are placed on opposite sides of 
the overlapping portions of the plates (25) so that Moire 
Fringes are detected at the line camera (31). The probes 
(24) are biassed outwardly so that the plates (25) will 
slide one relative to the other in response to diametric 
changes of the bore hole in the plane of the probes (24). 
The line camera (31) is connected to a suitable hardware 
package for processing the image of the Moire Fringes and 
thus obtain information related to the diametric change.
Patent EP-0266182-A3 (EP)
IPC: C07D409/12
Filed: 1987-10-28
Abstract: A compound represented by formula (I): 
  
, wherein R¹ is an organic residue through a carbon atom, 
R² is a carboxyl group which may be esterified or amidated, 
and X is an oxygen atom, or a sulfur atom which may be 
oxidized,  
or a salt thereof, which is useful as antibacterial agent 
or intermediate for synthesizing the same, and a process 
for preparing the same.
Patent EP-0279334-A3 (EP)
IPC: B22D11/053
Filed: 1988-02-10
Abstract: Die Erfindung betrifft eine Hubvorrichtung mit zwei an einem Hubtisch 
für die Stanggußkokille oder direkt an dieser angelenkten, drehbar ange­
triebenen Exzenterwellen. Kennzeichen der Erfindung ist, daß in die Ver­
bindung zwischen dem Drehantrieb (B) und 
den Exzenterwellen (A) mindestens 
eine Gelenkwelle (D) eingesetzt ist, 
die mindestens eine der beiden folgen­
den Bedingungen erfüllt: 
   a) die Lage des von der Exzenterwelle (A) abgewandten Gelenkkopfes (H) 
ist veränderbar (Änderung des Lagewinkels β),    b) die Gelenkköpfe (G,H) sind gegeneinander verdrehbar (Kardanfehler).
Patent EP-0295459-A3 (EP)
Title: Electronic assembly and method of making it
IPC: H01L23/495
Filed: 1988-05-24
Abstract: An electronic assembly and the method of making it is 
disclosed. A semiconductor device (10) is back bonded 
to a first lead frame (14). An adhesive insulative tape 
(24) is placed on the first lead frame and the device. 
A second lead frame (28) is mounted on the adhesive 
tape. Electrical contacts by wire bonds are established 
between the device and the first and second lead frames.
Patent EP-0296375-A3 (EP)
IPC: G01L9/00
Filed: 1988-05-27
Abstract: Bei einem Differenzdruck-Wandler (1) mit durch eine 
bewegbare Wand (4) abgeschlossenen Kammern (5,6) und 
mit einer induktiven Einrichtung (11,12,13,14,21), die 
einen mit der Wand (4) bewegbaren Kern (21) und eine in 
ihrer Lage zum Kern (21) einstellbare Spulenanordnung 
(13,14) umfaßt, ist zwecks Vereinfachung des konstruk­
tiven Aufbaus, kostengünstiger Herstellbarkeit und ho­
her Genauigkeit und Reproduzierbarkeit der Meßwerte so­
wie einfacher und genauer Justiermöglichkeit vorgese­
hen, daß Kern (21) und Spulenanordnung (13,14) eine 
Differentialdrossel mit zumindest zwei gegeneinander 
verstellbaren Spulen (13,14) bilden und daß die Lage 
jeder Spule (13,14) zum Kern (21) einstellbar ist.
Patent EP-0306628-A3 (EP)
IPC: C09D7/00
Filed: 1988-06-09
Abstract: A paint spray booth detackifying composition which 
includes mixtures of; melamine-formaldehyde polymers and 
polyvinyl alcohol polymer; and mixtures of melamine-formaldahyde 
polymer, polyvinyl alcohol polymer and styrene-acrylate polymer.