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Publication numberUS3146492 A
Publication typeGrant
Publication dateSep 1, 1964
Filing dateDec 18, 1957
Priority dateDec 18, 1957
Publication numberUS 3146492 A, US 3146492A, US-A-3146492, US3146492 A, US3146492A
InventorsJerome H Lemelson
Original AssigneeJerome H Lemelson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for making a lenticular display sheet
US 3146492 A
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Description  (OCR text may contain errors)

Sept. 1, 1964 J. H. LEMELSON 3,146,492

APPARATUS FOR MAKING A LENTICULAR DISPLAY SHEET Filed Dec. 18, 1957 INVENTOR.

JEROME H.LEMELSON United States Patent 3,146,492 APPARATUS FOR MAKING A LENTICULAR DISPLAY SHEET Jerome H. Lemelson, 85 Rector St., Metuchen, NJ. Filed Dec. 18, 1957, Ser. No. 703,523 3 Claims. (Cl. 18-10) This invention relates to apparatus for manufacturing a sheet display material and is a continuation-in-part of application Serial No. 559,232 filed on Jan. 16, 1956, and now U.S. Patent 3,026,648.

It is known in the art to fabricate a display device having a sheet of plastic with ribbed lens formations provided in the outer face thereof and multiple images defined by interspersed image bands disposed immediately adjacent the other face of the plastic which is flat. Such a display device is generally made of two or more sheets, a second sheet being used to support and position the illustration. A typical display device of this type contains illustrations which appear to change in content to an observer as the angle between line of sight and the face of the display changes.

Heretofore, displays of the above mentioned type have been fabricated by manually aligning two or more sheet materials including the capping or lens sheet and the sheet containing the multiple illustrations.

It is a primary object of this invention to provide a new and improved multiple image sheet display and apparatus for producing said display at low cost.

Another object is to provide an apparatus for automatically producing a lenticular sheet display material on a continuous basis.

Another object is to provide an apparatus for producing a sheet display material by extruding said sheet material and thereafter performing operations thereon for providing multiple illustrations against a flat face of said sheet and multiple lens formations in the other face of said sheet which are aligned with respective portions of the illustrations and cooperate therewith in creating changeable optical effects.

The above as Well as further objects, features and advantages of the present invention will be best appreciated by reference to the following detailed description of a preferred embodiment, when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a diagrammatic representation of a preferred apparatus for continuously producing a lenticular sheet display material;

FIG. 2 shows a modification to the apparatus of FIG. 1;

FIG. 3 is a side view of part of the apparatus of FIG. 1 with parts removed for clarity; and

FIG. 4 is an end view of part of a modified embossing roll applicable to the apparatus of FIG. 1.

In FIG. 1 there is shown an apparatus for continuously producing a lenticular sheet material by performing a plurality of operations on a sheet of plastic as it is fed through said apparatus. The plastic sheet 20 is fed from a supply roll 21 thereof which is rotationally supported by conventional means. The sheet 20 feeds from 21 through an assembly 22 of opposed guide and drive rolls 22a and 2212 prior to being admitted to the bite of a rotary printing press 23 having a printing roll 24 and a depressor roll 25 cooperating therewith to provide a printed pattern on the surface 20 of the sheet 20. Thereafter the sheet 20 is driven immediately adjacent a drying apparatus 26 which may comprise one or more heaters and/ or blowers operative to continuously flow warm air against the surface 20 to dry the ink applied thereto.

The printing provided on the face 20' of sheet 20 by the printing press 23 comprises an illustration consisting of a pattern having a plurality of parallel and separated image bands including a first array of spaced bands which are 3,146,492 Patented Sept. 1, 1964 repetitive in arrangement and substantially equispaced and define a first image field. The bands of the first image field are interposed between a second array of printed bands which are also substantially equispaced from each other by said first bands and have dissimilar image characteristics than the first bands and define a second image field. By the means described hereafter, the other face 20" of the sheet 20 is shaped with a plurality of parallel lenticular rib-like formations which are aligned and substantially parallel to the printed image bands so that the sheet 20 becomes a display material which exhibits changes in optical composition as the line of sight of the observer moves relative to the display material. Reference is made to my copending application Serial No. 360,954, filed June 11, 1953, and to U.S. Patent 2,951,419 which issued on September 6, 1960, for a Reflective Display Device for a further description of a display material having at least certain characteristics which are similar to those of the material producible by means of the apparatus of FIG. 1.

After passing the drying apparatus 26, the sheet 20 is next passed through rolls 27 and 28. The lower roll 28 is operative to form said mentioned lenticular formation in the face 20" of the sheet 20 on a continuous basis by embossing said lenticular formations therein.

If sheet 20 is a thermoplastic material such as a synthetic polymer, glass or the like it may be rendered semimolten by radiant heaters provided in the apparatus 26 so as to be formable by the embossing roll 28 with a plurality of parallel lenticular formations as it is driven therethrough. The lenticular formations are shaped as illustrated in FIGS. 3 and 4 as a plurality of parallel, side-byside rib-like lens formations, preferably of semi-cylindrical shape which serve to generally confine the portion of the multiple image display printed on the rear face 20' of the transparent sheet that an observer may view through the sheet, to a particular group or arrangement of image strips.

Also illustrated in FIG. 1 are a plurality of sheets 34 and 37 which may be laminated to the flat face 20 of the sheet 20 on a continuous basis to provide a particular type of display. The sheet 34 may comprise a reflex-reflecting material which may be continuously and automatically laminated to 20' for rendering the display sheet reflexretlecting so that it may be used for highway signs and the like. Said sheet 34 is shown being fed from a supply roll 35 thereof and is laminated between a backing sheet 37 provided from its supply roll 36, the three sheets 20, 34 and 37 being fed to the bite of the embossing and laminating rolls 27, 28 as shown. Notations 38 and 39 refer to spray applicators for applying coatings of adhesive material to opposite faces of the sheet 34 to effect the bonding of the three sheets together.

After passing through the rolls 27, 28 the sheet material is fed to the bite of a pair of aligned feed and drive rolls 32, 33 beyond which the sheet material may be cut to predetermined lengths or formed in a press 40 illustrated as a flying bed press which is operative to deform the sheet as it moves. Notation 41 refers to a shear operative to engage and cut the sheet into predetermined lengths 20T after said sheet has been formed as described which lengths are carried by a belt conveyor 42 away from the press 40.

The apparatus of FIG. 1 may be modified as illustrated in FIG. 2 by supplying the light transmitting sheet material 20 directly from an extruder 43 from which the extruded sheet is passed to said feed and guide rolls 22a, 22d prior to being fed to the printing press 23. In a preferred form of the invention, the sheet 20 is substantially solidified by the time it enters the printing press 23 although the elevated temperature thereof is preferably maintained so that the sheet may be easily embossed or provided in a condition whereby it may be deformed as described by the embossing roll 28.

In FIG. 3 is shown part of the embossing apparatus for providing said parallel lenticular formations L extending across the sheet at an angle to the longitudinal axis of the sheet. The embossing roll or drum 28 is shown having rib-like formations 29 provided therein which define parallel indentations 29' extending parallel to the axis of rotation of 28 which is defined by the shaft 30 supporting said drum. The indentations 29 are operative to emboss or mold rib lenticular formations 20L in the front face 20 of light transmitting material 20 with said formations 20L extending aligned with the printing provided against the other face 20' of 20. The shaft 31 of smoothly faced cylindrical roll 27 extends parallel to and in alignment with shaft 30 of embossing drum 28. The said display illustration disposed against the flat side of layer or sheet 20 may also be provided as matter printed on the surface of sheet 34 which abuts said lens sheet 20 in forming the completed display material.

FIG. 4 illustrates the lenticular formation embossing means modified whereby the embossing roll 28 has a plurality of rib formations 29a defining semi-cylindrical cavities 29a therebetween which extend peripherally around the working face of the roll rather than parallel to the axis of rotation as do the embossing formations in the roll 28 of FIG. 3. The embossing roll 28' is thus operative to provide a plurality of side-by-side rib-like lenticular formations which extend parallel to the longitudinal axis of the sheet rather than perpendicular or oblique thereto. The illustrative material provided against the flat face of sheet 20 in the modified apparatus of FIG. 4 thus extends as a plurality of bands parallel to said rib formations and accordingly substantially parallel to the longitudinal axis of the feeding sheet.

A latitude of modification, substitution and change is intended in the foregoing disclosure and it will be appreciated that features and concepts derived from the several figures may be employed in varying combinations to provide different sheet materials and display articles. In some instances some features of the invention will be used without a corresponding use of other features. It is therefore intended that the appended claims be construed broadly and in a manner consistent with the spirit and scope of the disclosure herein.

I claim:

1. Apparatus for producing a lenticular display sheet material containing a visible illustration which changes to an observer as his line of sight changes relative to said material comprising in combination, means for providing a continuous web of a transparent thermoplastic material as a sheet, means for continuously feeding said sheet and providing an illustration against a first face of said sheet which illustration comprises a pattern consisting of a plurality of parallel and separated image bands including a first array of spaced bands which are repetitive in arrangement and substantially equispaced to define a first image field, and which bands are interposed between a second array of printed bands which are substantially equispaced from each other and have dissimilar image characteristics than said first bands for defining a second image field, said apparatus including means for guiding and moving said sheet material in a predetermined path, means for supporting said first face of said sheet material, means for rendering said material semi-molten, an embossing means including a first cylindrically shaped roll which is void of surface formations and is shaped for continuously supporting said first face of said sheet material, a second embossing roll having parallel rib-like formations defining parallel cavities in its working surface, said embossing roll adapted for shaping the other face of said sheet material while semi-molten, in cooperation with said first roll, means for guiding said sheet material through said embossing means to effect the molding of rib-like lenticular formations in said other face of said sheet material which rib formations extend substantially parallel to and aligned with said image bands and are shaped as a plurality of elongated lenticules which are operative to provide the aforedescribed optical effect.

2. Apparatus in accordance with claim 1 in which said means for providing said web thermoplastic material comprises an extrusion machine including a die for expressing said material as a sheet.

3. Apparatus in accordance with claim 1 in which said means for providing said continuous web comprises means for supporting a roll of said thermoplastic sheet material, and means for printing said illustration on said first face of said sheet material as it is fed from said roll.

References Cited in the file of this patent UNITED STATES PATENTS 2,094,428 Fulton Sept. 28, 1937 2,205,466 Caprio June 25, 1940 2,421,277 Luce May 27, 1947 2,425,043 Moore Aug. 5, 1947 2,431,050 Kopplin Nov. 18, 1947 2,477,300 Karfiol July 26, 1949 2,522,408 Sowter Sept. 12, 1950 2,536,713 Berg Jan. 2, 1951 2,620,289 Douglas Dec. 2, 1952 2,652,326 Ogle Sept. 15, 1953 2,657,160 Croston Oct. 27, 1953 2,707,826 Sowter May 10, 1955 2,815,308 Robinson Dec. 3, 1957 2,817,618 Hahn Dec. 24, 1957 FOREIGN PATENTS 1,119,327 France Apr. 3, 1956

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2094428 *Feb 7, 1936Sep 28, 1937Leaton CorpAdherent-backed flexible material and method of making same
US2205466 *Sep 18, 1937Jun 25, 1940Celluloid CorpProcess for making decorative material
US2421277 *May 12, 1943May 27, 1947Luce Richard WReflective sign
US2425043 *Feb 12, 1945Aug 5, 1947Arlington Moore GeorgeContainer
US2431050 *Jul 12, 1943Nov 18, 1947Kopplin Karl JMethod of heat sealing laminated materials
US2477300 *May 12, 1945Jul 26, 1949Virts IncDecorative shelf edging
US2522408 *Oct 25, 1949Sep 12, 1950Gen Electric Co LtdCold pressure welding
US2536713 *Nov 17, 1947Jan 2, 1951Wesley Berg JohnMethod of making picture frames
US2620289 *Aug 27, 1945Dec 2, 1952Minnesota Mining & MfgMethod of securing flexible sheets to relatively stiff backings
US2652326 *Mar 26, 1949Sep 15, 1953Sperry CorpArt of making stereoscopic pictures
US2657160 *May 14, 1949Oct 27, 1953American Mfg Company IncVeneer joining apparatus
US2707826 *Feb 29, 1952May 10, 1955Gen Electric Co LtdMethod of making cold welded wire joints
US2815308 *Aug 26, 1954Dec 3, 1957Robinson Mfg IncMethod of making a composite sheet
US2817618 *Feb 14, 1957Dec 24, 1957Hall Hahn RobertLaminates and process for the production thereof
FR1119327A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3311687 *Jan 29, 1965Mar 28, 1967Chubb Alexander AlbertProcess for manufacturing a monofilament
US3379808 *Dec 14, 1964Apr 23, 1968Monsanto CoMethod and apparatus for fibrillating synthetic thermoplastic yarn
US3549463 *Jun 21, 1968Dec 22, 1970Riegel Paper CorpUniversal graphic display material having an embossed polyvinyl fluoride surface layer
US3635609 *Jul 26, 1968Jan 18, 1972Cavitron CorpApparatus for embossing of materials with high-frequency vibrations
US3907478 *Jan 20, 1972Sep 23, 1975Shell Oil CoProduction of polymer fibers
US4414316 *Sep 5, 1980Nov 8, 1983Rexham CorporationComposite lenticular screen sheet
US5266995 *Aug 12, 1992Nov 30, 1993Quad/Tech, Inc.Method for forming a graphic image web
US5310436 *Aug 7, 1992May 10, 1994Stimsonite CorporationPreprinted retroreflective highway sign and method for making the sign
US5320787 *Nov 27, 1992Jun 14, 1994Canon Kabushiki KaishaApparatus and process for manufacturing substrate sheet for information recording mediums
US5330799 *Sep 15, 1992Jul 19, 1994The Phscologram Venture, Inc.Making autostereograms by wrapping flexible sheet with printed stereographic image around transparent cylinder with relief pattern of array of inverse lenticules, alignment, impressing lenticule array on thermosetting polymer, ultraviolet curing
US5362351 *Jul 9, 1993Nov 8, 1994Karszes William MContinuously advancing substrate film while coextruding two thermoplastic resins; contacting chill roll
US5391254 *Apr 8, 1993Feb 21, 1995Eastman Kodak CompanyAlignment apparatus and associated methods for depth images
US5457515 *Jan 11, 1994Oct 10, 1995Quad/Tech, Inc.Method for forming a graphic image web
US5492578 *Aug 26, 1994Feb 20, 1996Eastman Kodak CompanyAlignment apparatus and associated methods for depth images
US5554432 *Mar 2, 1994Sep 10, 1996The Phscologram Venture, Inc.Press polymerization of lenticular images
US5770122 *Apr 11, 1997Jun 23, 1998Curchod; Donald B.Roll former for an extruded fresnel lens
US5870233 *Mar 4, 1997Feb 9, 1999Roehm Gmbh Chemische FabrikProcess for manufacture of fresnel lenses
US5885490 *Oct 8, 1997Mar 23, 1999Goyo Paper Working Co., Ltd.Extruding thermoplastic resin in three-dimensional pattern;release sheet
US5945042 *Oct 21, 1996Aug 31, 1999Nippon Carbide Kogyo Kabushiki KaishaSupplying synthetic resin sheet into thermoforming zone; embossing
US6060003 *Oct 31, 1996May 9, 2000Karszes; William M.Extruding a molten plastic sheet into a nip between a chill roller and patterned chill roller to impress the lenticular pattern on the sheet, applying force in direction of patterned roller to inhibit deformation as plastic cools
US6084713 *Mar 20, 1997Jul 4, 2000Rosenthal; Bruce A.Lenticular optical system
US6256149Sep 28, 1998Jul 3, 2001Richard W. RolfeLenticular lens sheet and method of making
US6724536Jul 3, 2001Apr 20, 2004University Of ArkansasDirectional image lenticular window sheet
US7789650Dec 22, 2006Sep 7, 2010N.P. Johnson Family Limited PartnershipFresnel lens angular segment manufacturing apparatus and method
US7789651Jul 11, 2007Sep 7, 2010N. P. Johnson Family Limited PartnershipPresnel lens angular segment manufacturing apparatus and method
US7789652Dec 24, 2007Sep 7, 2010N.P. Johnson Family Limited PartnershipFresnel lens angular segment manufacturing apparatus and method
EP0659531A1 *Dec 17, 1994Jun 28, 1995Röhm GmbHProcess for extrusion of plastic plates and Fresnel lenses produced therefrom
WO1993013929A1 *Jan 15, 1993Jul 22, 1993William M KarszesMethod of making lenticular plastics and products therefrom
WO1996024490A1 *Feb 6, 1996Aug 15, 1996Lenticular Plastics IncDecorative system for apparel and method of making same
Classifications
U.S. Classification425/327, 264/1.6, 359/619, 428/29, 156/536, 425/296, 264/2.4, 156/244.25, 156/209, 156/277, 156/384, 264/1.9
International ClassificationB29D11/00, B29C69/02, B29C43/22
Cooperative ClassificationB29C43/22, B29D11/00278, B29C47/0038, B29C47/0033, B29C47/02, B29C47/0021
European ClassificationB29C43/22, B29C47/00L, B29D11/00C6