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Publication numberUS3762365 A
Publication typeGrant
Publication dateOct 2, 1973
Filing dateFeb 24, 1972
Priority dateFeb 24, 1972
Publication numberUS 3762365 A, US 3762365A, US-A-3762365, US3762365 A, US3762365A
InventorsP Herzog
Original AssigneePolytype Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Web coating apparatus
US 3762365 A
Abstract
An apparatus for coating paper, tissue, cardboard, metal foils, thermoplastic films and similar materials includes a hard surfaced raster roll having regularly formed depressions or cells inset into its circumferential surface and over which surface the material to be coated is directed. A portion of the circumferential periphery of the raster roll rotates through an opening in a tank containing a liquid melt of the substance to be coated. The raster roll picks up the liquid melt as its circumferential peripheral surface rotates through the tank and a wiper blade is positioned at the location at which the roll exits from the tank for removing any excess of the liquid melt and retaining it within the tank. The blade has its edge,which contacts the roll,extending toward the roll in the direction opposite to the direction in which the roll rotates. Further, the tank and the wiper blade are mounted for oscillatory or reciprocatory movement relative to the raster roll.
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United States Patent 11 1 Herzog 1 Oct. 2, 1973 54] WEB COATING APPARATUS 3,169,082 2/l965 Krikorian ll8/4l3 3,511,693 51970 D 'd. 118 413x [75] Inventor: Peter Herzog, Fr1bourg, Switzerland [73] Assignee: Polytype AG, Fribourg, Switzerland P im ry Examin rl hn P. Mclntosh Filed Feb 24 1972 Attorney-David Toren et al.

[2l] Appl. N0.: 229,003 [57] ABSTRACT Related U S Application Dam An apparatus for coating paper, tissue, cardboard, 63 I metal foils, thermoplastic films and similar materials I l g l of 1970 includes a hard surfaced raster roll having regularly d one formed depressions or cells inset into its circumferential surface and over which surface the material to be Cl 118/212 118/249 a coated is directed. A portion of the circumferential pc- [5 1 in CI 805C 1/04 riphery of the raster roll rotates through an opening in [58] Fie'ld 407 02 a tank containing a liquid melt of the substance to he 8/409 4 l 26] coated. The raster roll picks up the liquid melt as its cir- 1 6 cumferential peripheral surface rotates through the tank and a wiper blade is positioned at the location at which the roll exits from the tank for removing any ex- [56] References Clted cess of the liquid melt and retaining it within the tank.

UNITED STATES PATENTS The blade has its cdge,which contacts the roll,extend- 2940,8618 6/l960 Patchell ll8/249 X ing toward the roll in the direction opposite to the di- 3\453-l38 7/1969 i ll8/259 X rection in which the roll rotates. Further, the tank and 2 1 H1962 y the wiper blade are mounted for oscillatory or reciprogi X catory movement relative to the raster roll. 2Il701560 8/1939 Hayes 118/261 X 4 Claims, 5 Drawing Figures PATENTEDBBT 2mm sum 1 UF 2 FIGZ PATENTEDUBI 2191a SHEET 2 BF 2 FIG. 3

F'IGA- WEB COATING APPARATUS This is a continuation in artapplication of Ser. No. 291 filed January 2, 1970, now abandoned.

SUMMARY OF- THE INVENTION This invention relates in general to apparatus for coating webs and, in particular, to a new and useful apparatus for coating material such as paper, tissue, cardboard, thermoplastic film, metal foils such as aluminum and similar material with a highly viscous substance which is applied directly to the web by moving the web over the arcuate surface of a roller which has passed through a reservoir of the coating substance.

According to a known method, the coating of webs is effected by means of a pouring funnel having a nozzle discharge of slot shaped configuration through which the molten coating material issues as a curtain either by its own weight or under pressure. The issuing film is applied on the web which moves under the nozzle. The slot width of the nozzle generally determines the dosage in combination with the applying pressure and the velocity of the feed of the web. The slightest variation of any one of these factors will cause a considerable difference in the amount or weight of material which is deposited on the web. The excess material is usually collected in a tank and then pumped back into the pouring funnel. The air inclusions formed in the highly viscous melt material thus is contained in the coating film and accordingly, requires long conditioning zones in order to ensure that the air is removed and does not form bubbles. A further disadvantage of the known process is the requirement for high web tensions which are not suitable, for example, for coating very thin webs such as aluminum or other metal foil. In addition, with the known method, it is not possible to vary the coating process, for example, to vary the weight of one of the constituents or to vary the quality of the coating, such as its gloss. With the known method, generally, it is possible only to process melts of low viscosity. Another known arrangement for the coating of webs is effected by a tank having a slotted nozzle which is arranged under the web; and, as the web is moved over the nozzle, the melt is permitted to ooze up into the web material which is stretched over the nozzle lip. The removal of the excess material of the coating and the equalization of the coating surface is effected by steel scrapers arranged behind the nozzle. With this process there is also the likelihood that air will be included in the coating because the excess material is pumped back to the coating tank and transferred to the web by the nozzle. In this arrangement, it is possible to process relatively highly viscous melts, however, a high web tension is required to obtain even a minimum stripping effect at the nozzle lip. For this reason, the arrangement is not suitable for applying a coating on tension sensitive webs.

A further known coating arrangement relates to the coating of webs by means of oppositely moving, smooth, chromium plated heated steel rolls. The amount of coating is determined by the gap width between the rolls and the melt is fed from a tank located above the nip of the rolls. A disadvantage of this method is that it is difficult to provide the necessary circumferential velocities and rotating accuracies of the roll and the velocity of the web fed between them and to construct the arrangement so that there is no sagging between the roll which would vary the quantity of coating applied across the web material. Since the velocity differences of the circumferences of the rolls relative to the web to be coated are considerable, high residual 1 pressures are formed in the roll gap when highly viscous melts are used. In addition, for a relatively small deposit of coating the rolls must be so closely spaced that they can be easily damaged. Some attempts have been made to coat web material by means of a raster roll over which the web material is fed. The raster roll draws the melt by its rotation adjacent the bottom of a tank supply thereof and it delivers the melt under an oscillating wiper. The wiper strips off the excess of the melt coating so that only the raster cups or recesses de-. fined in the raster roll are filled. With highly viscous melts, however, the wiper is pushed away from the roll by the wedging effect of the melt and thus changes the weight of the coating being applied. In addition, the film breaks on the raster roll when using a high viscosity melt and operating at high speed of the raster roll so that the drawing effect is practically cancelled. As a result, the web is only partly coated. Another disadvantage is the requirement for the heating of the relatively large quantities of the melt material dueto the fact that the melt is a very poor conductor and, therefore, large quantities of the melt material tend to have consider? able local temperature variations. Such temperature variations also produce great variations in viscosity. For this reason it is very difficult, it not impossible, to provide a coating of a relatively low weight at high velocity operation.

In accordance with the present invention, the disadvantages of the prior art are avoided and an effective apparatus for coating with highly viscous substances is provided. The invention includes a rotatable raster roll which extends into a reservoir containing the melt material to be coated through an opening formed in the walls of the reservoir. As the surface of the roll emerges from the reservoir with the meltmaterial it is engaged by a wiper blade which is arranged substantially contacting the surface of the roller and the edge of the wiper blade contacting the roller is directed opposite to the direction of rotation. The melt material is'supplied into the tank from the top thereof and it is maintained in the melted condition by heaters carried by the tank. The tank is advantageously supported on guides for horizontal oscillating movement along an axis in parallel with the axis of rotation of the raster roll.

Accordingly, it is an object of the invention to provide an improved means for applying a coating to a web which includes a rotatable raster roll over'which the web travels and with a portion of the rolls circumferential periphery extending through an opening in a reservoir containing the coating material. The coating material is maintained in a proper melted condition and is wiped from the surface of the raster roll by a wiper blade positioned extending toward the surface of the roll. The wiper blades contact the surfaceof the raster roll at its point of exit from the reservoir as it rotates.

A further object of the invention is to provide a' coating device which. is simple in design, rugged in construction and economical to manufacture.

v The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating-advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated and described a preferred embodiment of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings the apparatus illustrated includes a rotatable raster roll 1 which is mounted for rotation in the direction of the arrow 13 about a horizontal axis. The raster roll is a steel roll with a thin layer of chromium, for example, about 80 microns thick, plated on its circumferential periphery for protection against corrosion and rapid wear. Except for the opposite end portions, the entire circumferential peripheral surface of the raster roll is worked to provide a uniform arrangement of depressions or cells la, note FIG. 3. The depressions or cells can have a variety of shapes, such as inverted pyramids with quadrangular bases, inverted truncated pyramids with quadrangular bases and diagonal V-shaped grooves. The depressions or cells are formed in a raster roll by a molette, that is a working or engraving roll. Extending horizontally along one side of the raster roll is a tank 2 containing a quantity of a substance 6, such as wax or a hot melt substance, for coating paper, tissue, cardboard, thermoplastic film, metal foil such as aluminum, and similar materials. An opening 2a is formed in the side and bottom of the tank adjacent the raster roll and the roll is positioned relative to the tank so that it extends laterally through the opening into the body of the coating substance 6. As the raster roll 1 rotates, its circumferential peripheral surface picks up the coating substance from within the tank 2 in the depressions or cells la.

As illustrated in FIG. 4, horizontally arranged guide members 4 and 5 are secured to the ends of the tank 2 and extend into bushings 4a and 50, respectively, mounted on a stationary frame 20. In addition, a motor 22 with an eccentric cam, not shown, is mounted on the tank and a rod extends from the cam and is fixed to the frame 20. As the motor 22 drives the cam, the rod which is fixed to the frame imparts a reciprocating action to the tank so that is oscillates or reciprocates in the horizontal direction supported and guided by the sliding engagement of the guide members 4 and 5 within the bushings 4a and 50. Accordingly, the tank moves in the horizontal direction with a reciprocating or oscillatory motion relative to the raster roll 1.

As can be seen in FIG. 3, the horizontal dimension of the raster roll 1 is greater than that of the tank 2 so that the ends 1b and 1c of the roll extend laterally beyond the upwardly extending ends 2b, 2c of the tank. The amount of reciprocating or oscillating movement of the tank is such that its ends 2b, 2c do not extend beyond the corresponding ends lb, 1c of the roll and, accordingly, there is no leakage from the tank.

Previously it was mentioned that the opposite ends of the raster roll 1, that is the ends lb and 1c, do not contain the depressions or cells In, and this is evident from FIG. 3. Further, the portions of the corresponding ends 2b, 2c of the tank 2 which define the opening 2a, each have a Teflon coating 30 for facilitating the relative sliding action between the tank and the raster roll and for preventing leakage from the tank.

On the opposite side of the tank 2 from its opening 2a, a side wall 14 has upper and lower heating elements 11 and 12 for maintaining the temperature of the coating substance 6 at a level sufficient to afford the desired coating action. The coating substance 6 is supplied into the tank 2 in a liquid or melted condition through an inlet, not shown. A cover I0 closes the tank 2 at its top and can be removed for inspection, maintenance and operational purposes.

As the raster roll 1 rotates through the opening 2a in the tank 2, its depressions or cells la pick up the coating substance 6 and a doctor or wiper blade 3 is positioned at the exit side of the opening relative to the direction of movement of the roll for removing any excess of the coating substance from the surface of the roll and for retaining the excess within the tank. The wiper blade 3 is formed of steel sheet. The wiper blade is secured to and oscillates with the tank 2 by means of a tongue or plate 8 which is held in position on the tank by screws 9. Further, one or more adjustment screws 7 are mounted in the lower end of the tank for providing fine adjustment of the wiper blade in respect to the circumferential peripheral surface of the raster roll 1. As can be noted in FIGS. 1 and 2, the edge of the wiper blade which removes the excess is directed against the raster roll so that it faces in the direction opposite to the direction of rotation of the roll.

To assure a uniform temperature level throughout the body of the coating substance 6 in the tank 2, one or more immersion heaters, not shown, are positioned within the body of the coating substance.

In FIGS. 1 and 2 the operation of the apparatus is indicated with a web W of the material to be coated passing through the nip between the raster roll 1 and another roll 40 the direction of feed of the web and of rotation of the rolls is shown by arrows. As the raster roll rotates through the opening 2a in the tank 2, it picks up the coating substance 6 in its cells la and any excess on its surface is removed by the wiper blade as the roll exits from the opening at the lower end of the tank. As the roll rotates, the tank 2 and the wiper blade 3 oscillate or reciprocate in the horizontal direction relative to the roll in effecting the filling of the cells In and the wiping of excess coating substance from the surface of the roll.

As the raster roll rotates, its surface containing the cells in which the coating substance is located, comes into contact with the surface of the web \V at the nip between the rolls and the coating substance is transferred to the web as required. As an example of a typical coating operation, a cellulose paper of 58 g/m, travelling at a speed of 300 m/minute is coated with 7 g/m, of Lunamelt HS 400 by the raster roll. Further, with this apparatus wax coatings of g/m, can be applied to the material to be coated. The temperature of the coating substance in the melted condition depends on the type of substance being used and generally ranges between 60 and C. As indicated above, the tank 2 is heated so that a uniform temperature is maintained throughout the body of the coating substance.

By the combination of the wiping action provided by the wiper blade, which retains any excess of the coating substance from the surface of the raster roll within the tank, and the oscillating movement of the tank and the blade, the problem experienced in the prior art, where air bubbles included in the coating interfered with the proper coating action, is overcome.

The sealing action afforded between the edges of the tank and the corresponding ends of the raster roll against which the edges bear as they oscillate back and forth, assures that the operation can proceed without any problem of leakage of the coating substance from the tank.

While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

What is claimed is:

1. Web coating apparatus comprising a horizontally elongated tank containing a pool of fluid coating substance and said tank including a pair of laterally spaced tank ends with a bottom member, and a back member extending between said tank ends and defining an opening formed in said tank extending in the horizontal direction thereof and formed in the lower portion of said tank ends and in an adjacent part of the bottom member and the opening arranged in communication with the pool of coating substance in the tank, a raster roll of a length longer than said tank having depressions formed in at least a portion of its central circumferential periphery and mounted for rotation about a horizontal axis positioned adjacent said opening of said tank, said raster roll extending along said tank with a portion of its circumferential periphery projecting through the opening in said tank into the pool of fluid coating substance therein, said tank ends disposed transversely of the axis of said roll and the lower portions of said tank ends being curved to complement and in sealing engagement with the curved surface of said roll means for oscillating said tank in the horizontal direction relative to said roll, and an elongated wiper blade mounted on said adjacent part of the bottom member of said tank and extending obliquely of the bottom of said tank, the wiping edge of said blade located closely adjacent to and extending along the circumferential periphery of said roll at the point of emergence of the surface of said roll from contact with the pool of fluid coating substance for providing a wiping action on the circumferential periphery of said roll, said blade is positioned so that its wiping edge in contact with said roll faces toward said roll in the direction opposite to the rotation of said roll when the roll surface is moved downwardly past said bottom member, and means arranged for adjustably mountingsaid wiper blade on the bottom surface of said tank and for providing a fine adjustment of its wiping edge relative to the circumferential periphery of said roll.

2. Web coating apparatus, as set forth in claim 1, wherein the circumferential periphery of said raster roll having opposite end portions and a center portion extending between said end portions, the depressions formed in the circumferential periphery of said raster roll arranged in a uniformly spaced manner over the center portion of the circumferential periphery of said raster roll 3. Web coating apparatus, as set forth in claim 1, wherein said means for oscillating said tank comprises a stationary frame, horizontally extending bushings fixed to said frame, horizontally extending guide members attached to said tank and slidably supported within said bushings, and means secured to said tank and fixed ment to said tank.

UNITED STATES PATENT OFFICE" I v CERTIFICATE OF CORRECTION Patent No. v 762 r 365 D t d October "2 1973.

Inventor(s) v eter 'Herzog It is certified that ex ror appears in the above-identified patent '31; i that said Letters Patent are hereby corrected as shown below:

In the heading of the patent, insert:

--[30] Foreign Application Pr'iority'Deta' I January lo, 1969 Sweden... 1 Io. 314E69 signedqendsealed this 1st day drain-wry 197A.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. RENE D;- TEGTMEYER o I I Attesting Officer Acting Commissioner? of Patents I FoRM po-m so (10-69)

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1235326 *Feb 14, 1916Jul 31, 1917Russell CompanyMachine for coating sheet material.
US1663232 *May 3, 1927Mar 20, 1928Goodrich Co B FStrip-coating apparatus
US2170560 *Mar 25, 1937Aug 22, 1939James River Paper Products IncIntaglio roll
US2940868 *May 16, 1956Jun 14, 1960Smith & NephewAdhesive medical and surgical dressings
US3066047 *Dec 22, 1958Nov 27, 1962Beloit Iron WorksCoating machine and method using a vibrating fountain with doctor
US3169082 *May 28, 1962Feb 9, 1965Rice Barton CorpTrailing blade coater
US3453138 *Jul 27, 1966Jul 1, 1969Polaroid CorpPhotographic processing apparatus and method
US3511693 *May 1, 1967May 12, 1970Standard Register CoHot melt coating
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3814052 *May 8, 1972Jun 4, 1974H CaratschApparatus for applying a thermoplastic material in the form of mutually isolated deposits to a surface structure
US3908589 *Jun 24, 1974Sep 30, 1975Xerox CorpStructure for applying release agent to a heated fuser roll structure
US3918397 *Jul 22, 1974Nov 11, 1975Xerox CorpContact fusing apparatus for fixing toner images to a support member
US3957016 *Sep 26, 1973May 18, 1976Canon Kabushiki KaishaDeveloper wringing and removing apparatus
US3965853 *Jul 22, 1974Jun 29, 1976Xerox CorporationContact fuser assembly
US3974554 *May 16, 1975Aug 17, 1976Xerox CorporationQuadrangular trihelicoid gravure roll
US3978817 *May 16, 1975Sep 7, 1976Xerox CorporationPatterned gravure and doctoring means therefor
US4026238 *Jul 21, 1975May 31, 1977Xerox CorporationApparatus for applying release material to a contact fuser roll member utilized in fixing toner images to support sheets
US4034706 *Jul 22, 1974Jul 12, 1977Xerox CorporationDual release agent cu-viton fuser
US4045163 *Aug 30, 1976Aug 30, 1977Xerox CorporationHeated fuser release agent container
US4051274 *Mar 31, 1976Sep 27, 1977Dainippon Screen Seizo Kabushiki-KaishaMethod for coating the photoresist onto a belt-like material comprising a perforated carrier and metallic foil
US4055143 *Sep 20, 1976Oct 25, 1977Xerox CorporationRelease material application seal
US4139613 *Mar 25, 1977Feb 13, 1979Kufner Textilwerke KgProcess for the patterned deposition of powdered thermoplastic adhesive materials on the outer surface of a surface form
US4141313 *Jul 19, 1976Feb 27, 1979Kufner Textilwerke KgApparatus for the patterned deposition of powdered thermoplastics adhesive material on the outer surface of a surface form
US4213930 *May 24, 1978Jul 22, 1980Hexcel CorporationMethod for increasing the surface tack of prepreg materials
US4232628 *Nov 10, 1976Nov 11, 1980Eskofot Research A/SToner applicator for electrostatic copier
US4245583 *Dec 15, 1978Jan 20, 1981Polytype AgMechanism to transfer a viscous coating medium
US4308716 *Jul 9, 1980Jan 5, 1982Barmag Barmer Maschinenfabrik AgApparatus for applying liquid to a running yarn
US4364157 *Nov 20, 1980Dec 21, 1982Cutts William HMethod for applying sizing to warp yarns
US4376008 *May 22, 1981Mar 8, 1983Huotari LauriApparatus for binding sheets of paper
US4468418 *Feb 7, 1983Aug 28, 1984The Louis G. Freeman CompanyProcess for applying thermoplastic adhesive to flexible die-cut parts
US4538541 *Mar 29, 1983Sep 3, 1985Johannes ZimmerMethod of and apparatus for applying a uniform layer of liquid to a surface
US4664058 *Oct 25, 1985May 12, 1987International Paper CompanyCoating roll surface configuration for applying liquid sterilant to a moving web
US4744688 *May 30, 1986May 17, 1988David SilberHand tool for applying hot melt adhesive
US4876982 *Jun 6, 1988Oct 31, 1989Claassen Henning JApparatus for the application of liquid adhesives to a substrate
US4882005 *Aug 10, 1987Nov 21, 1989Thompson Corrugated Systems, Inc.Device for making laminated arch corrugated structures
US5045140 *Apr 28, 1989Sep 3, 1991Cms Gilbreth Packaging Systems, Inc.Ultra high speed labeling apparatus and method
US5160570 *May 8, 1991Nov 3, 1992Cms Gilbreth Packaging Systems, Inc.Ultra high speed labeling apparatus
US5228920 *Jun 3, 1991Jul 20, 1993Thompson Iii Ernest EFilm coating unit
US5437759 *Jun 14, 1994Aug 1, 1995Westbury; IanApparatus and method for applying labels onto small cylindrical articles using wiper speed differential
US5462594 *May 20, 1993Oct 31, 1995Valmet Paper Machinery Inc.Coating device for coating of a size-press roll, paper or board
US6270577 *Nov 19, 1999Aug 7, 2001Fort James CorporationApparatus for producing coated base products
US6306215 *Mar 10, 1998Oct 23, 2001Valence Technology, Inc.Apparatus for coating current collectors
US6439290 *Sep 5, 2000Aug 27, 2002Monti Antonio S.P.A.Device to be mounted in an apparatus for coupling fabrics by means of a glue
US7060157 *Sep 2, 2000Jun 13, 2006Hans BauerMethod for producing undergarments by using glued joints
US7736456 *Nov 18, 2003Jun 15, 2010The Procter & Gamble CompanyProcess for printing actives onto articles
US8028496Oct 10, 2008Oct 4, 2011Khs AgGlue application device for a labeling machine
US8402721 *Apr 24, 2009Mar 26, 2013Khs GmbhBeverage bottling or container filling plant having a beverage bottle or container labeling machine, and a beverage bottle or container labeling machine
US20040142110 *Nov 18, 2003Jul 22, 2004The Procter & Gamble CompanyProcess for printing actives onto articles
US20070037703 *Mar 25, 2004Feb 15, 2007Ngk Insulators, Ltd.Method of manufacturing honeycomb catalyst
US20090095372 *Oct 10, 2008Apr 16, 2009Lutz DeckertBeverage bottling plant, a labeling machine for use in a beverage bottling plant, and a glue application device for use with a labeling machine in a beverage bottling plant
US20090232998 *Jun 30, 2006Sep 17, 2009Polytype Converting S.A.Nip coating device and method
US20100101681 *Apr 24, 2009Apr 29, 2010Kraemer KlausBeverage bottling or container filling plant having a beverage bottle or container labeling machine, and a beverage bottle or container labeling machine
DE3427430A1 *Jul 25, 1984Feb 6, 1986Erich PagendarmRoller arrangement with a bath roller and end-side sealing devices
DE19623348A1 *Jun 12, 1996Dec 18, 1997Baldwin Gegenheimer GmbhDistributing roller used in printing industry
DE19623348B4 *Jun 12, 1996Mar 1, 2007Baldwin Germany GmbhFlüssigkeits-Übertragungsvorrichtung der graphischen Industrie
DE19623349A1 *Jun 12, 1996Dec 18, 1997Baldwin Gegenheimer GmbhFluid supply system used in printing industry
DE102006017365A1 *Apr 11, 2006Oct 18, 2007Khs AgBeleimungsvorrichtung
EP1086751A3 *Sep 8, 2000Jan 12, 2005Monti Antonio S.p.A.An improved device to be mounted in an apparatus for coupling fabrics by means of a glue
WO1996000255A1 *Jun 12, 1995Jan 4, 1996Raymond Enterprises, Inc.Making lenticular optical systems and apparatus therefor
WO1997002312A1 *Jul 3, 1995Jan 23, 1997Raymond Enterprises, Inc.Making lenticular optical systems and apparatus therefore
WO1997007899A1 *Jul 17, 1996Mar 6, 1997Minnesota Mining And Manufacturing CompanyReverse gravure kiss coating system with output roller
Classifications
U.S. Classification118/212, 118/261, 118/249, 118/259
International ClassificationD06B1/14, B05C1/08, B05C1/12, B05C5/02
Cooperative ClassificationB05C1/086, D06B1/144, B05C1/0808, D21H5/0032, D21H23/58
European ClassificationB05C1/08Y, D21H23/58, B05C1/08D, D06B1/14F, D21H5/00C10D2