US2478132A - Method of making loose-leaf binder case construction - Google Patents

Method of making loose-leaf binder case construction Download PDF

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US2478132A
US2478132A US1582648A US2478132A US 2478132 A US2478132 A US 2478132A US 1582648 A US1582648 A US 1582648A US 2478132 A US2478132 A US 2478132A
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sheet
limp
sheets
tool
binder case
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Schade Frank Stanley
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Avery Dennison Office Products Co
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Avery Dennison Office Products Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42CBOOKBINDING
    • B42C7/00Manufacturing bookbinding cases or covers of books or loose-leaf binders
    • B42C7/002Manufacturing loose-leaf binders, folders
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1034Overedge bending of lamina about edges of sheetlike base
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108Flash, trim or excess removal

Description

I -'..S. SCHADE METHOD OF MAKING LOOSE-LEAF BINDER CASE CONSTRUCTIONS 2 Sheets-Sheet 1 Original Filed Nov. 15. 1946 INVENTOR xkqm' d'mmurd'c/moz (7%; ,9L HTTORNEYS F. S. SCHADE Aug. 2, 1949.
METHOD OF. MAKING LOOSE-LEAF BINDER CASE QQNSTRUCTIONS "2 Sheets-Shet 2 Original Filed Nov. 15, 1946 INVENTOR 7 5M, dmvzz demo:
BY W W ATTORNEYS Patented Aug. 2, 1949 METHOD OF MAKING LOOSE-LEAF BINDER CASE CONSTRUCTIONS Frank Stanley Schade, Holyoke, Mass., assignor to National Blank Book Company, Holyoke, Mass, a corporation of Massachusetts Original application November 15, 1946, Serial Divided and this application March 19, 1948, Serial No. 15,826
6 Claims. 1
This invention relates to improvements in the methods of laminating sheet plastics, the new method being particularly useful in binder case construction for books as its use results in an improved product made efliciently and economically.
In the prior art, the nearest method to the present invention that is known to me, is to be found in my Patent No. 2,390,125 issued December 4, 1945. That patent shows how to make an economical book binder case of useful character by laminating plastic sheets of limp character together with panel inserts for stiffening the covers and the back portion in a particular way to give special advantages. Important features of construction disclosed in that patent are retained in the construction made by the method of this invention. The important differences between the two methods of laminating will become evident after the steps for making efiiciently, a binder case of high quality, fine appearance, and low cost are disclosed as an example of the present invention. A useful product made by the method of the present invention is disclosed in my copending application, Serial No. 709,956 filed November 15, 1946, of which this application is a division. It is to be noted that while the example chosen is a binder case for a loose leaf binder, the method of laminating disclosed in the present invention is equally adapted for making a binder case for a permanently bound book.
In the drawings:
Fig. 1 is a plan view of the binder case with rivets indicated for attaching a ring mechanism on the back portion, but without such mechanism being shown;
Fig. 2 is a diagrammatic view showing the profile considered centrally of the binder case of Fig. 1;
Fig. 3 is an enlarged section taken on line 3-3 of Fig. 1, broken away in part for convenience of illustration;
Fig 4 is a perspective view of the elements which are combined to form the binder of Fig. 1. The various parts are spaced from each other in order to show them more clearly;
Fig. 5 is a small scale perspective view showing a modified form of stifiener panel;
Fig. 6 is a perspective view of a tool used in assembling the parts of Fig. 4;
Fig. 7 is a, fragmentary plan view of a sheet containing a plurality of binder cases like the one indicated in Fig. 1, with the plurality in assembled but uncut form; and
Fig. 8 is a perspective view like Fig. 4 showing a modified form having only two sheets, one limp sheet and a stiffener panel sheet.
The new laminating method of this invention is particularly adapted to making a binder case as shown in plan and section in Figs. 1 and 3 of the drawings. They show a plan view of an opened binder case consisting of a back portion I, two hinged cover portions 2 and 3, and hinge portions b, all of laminated material. Rivets 4 have been shown on the back portion 1 for assembly of ring mechanism, not shown. Although the binder case is particularly useful for loose leaf books and the drawings show such as an example, the binder case may easily be adapted for permanently bound books.
By way of disclosing the new method, the feature of the improved laminated product in the examples of Figs. 1, 2 and 3 will now be described. This example retains important advantages seen in the construction of said prior patent, i, e. Fig. 7 of that patent, and adds improvements.
A main improvement is in the nature of the cover portions. Referring to Figs. 1 to 4, the two limp plastic sheets 5 and B, seen in Fig. 4, are to enclose stiffening panels H as in Fig. 3. They are welded together on buffer margin a and on hinge bands b. The panels H of stiffening sheet I, however, are not welded to the material of limp sheets 5 and 6 as these sheets enter into the form of Fig. 3 under the method of making to be described. The portion of limp plastic material from sheet 5 overlying each panel II and the corresponding portion of limp plastic material from sheet 6 underlying each panel II in the assembly of Fig. 3, are portions which are not fastened together or to the panel I l in either cover 2 or cover 3 in the final binder case construction. The limp sheets 5 and 6 are fastened together, however, around substantially the whole margin of each panel II in bands a and b. The result is that the limp sheet plastic material on opposite sides of each panel H, can move relatively to the stifiening panel H and to each other. The movement will be permitted due to the limp character of the outer sheets, aided by some elasticity of the material and in spite of the binding margin seen in bands a and b. These marginal bands limit the degree of relative movement in the cover areas where the stiffening panels are laminated. When these cover areas are handled by the user their outside limp sheets are given a limited creeping movement with relation to the stiffening material of the panels. These same cover areas of the limp sheets also have enough looseness inside their edge margins a and b to take a slightly wavy surface form when either cover is slightly lbent, particularly on the inside surface of the bend, When the covers are laid out flat these same cover areas have a slightly built up appearance, :i. e. a slight degree of pufiiness that distinguishes them from a flat hard looking surface. Together these things give a nature to the cover portions which closely simulates a rich soft leather action .and appearance.
The significant improvement over my prior patent is strikingly apparent to the eye :and to the feeling of the binder "case, or o'thenslimilar article made by the laminating method of this invention, in the hands of the user. inated binder case product f the example is indicated in the enlarged scale of Fig. 3 to show better the arrangement of elements. The ,profile of Fig. 2 better shows the nature of the binder case construction for its sheet form of covers 2 and 3, back'p'ortion I,'*h'inge'strips b, and peripheral bulier margin a, especially when the profile of Fig. 2 is 'consideredwith the plan view of Fig. 1. The improved appearance seen in thisbinder case construction as compared to the construction of said patent is much more remarkable when the tangible products instead of the drawings are compared. The prior "product and the improved productmay'be made o'fthe same limp sheet plastic material 'an'd'stiffening panels. By leaving the laminations loose "in the manner described the binding case product is improved.
In the new laminating method, the product is also improved by the construction of the back panel element made "of the .parts'as indicated in Figs. 3 and 4. The rivets 4 are'fasten'ed atone end to the stiff strip 8 "for carrying them in the desired spacing. This strip is laminated in the back panel with 'stiiieningpa'nel I2 and 'the'back panel portions in the "area *o'f'limp plastic sheets 5 and 6, as indicated in Fig. 4. This example'of back panel construction shows one adapted for low cost steps in making of'the binder case construction with rivets builtfin to 'takethe loose leaf mechanism. The utility of this feature will be seen better whenthe'meth'od o'fmaking the product is described.
The method involves welding the two limp plastic sheets '5 and 6 along margins-wand bands 22, into a single limp'sheet'strip for margin buffer a and into bands I) forthe hinges. A useful tool to do this is shown in'Fig. 6. 'Oneexample of the method will be disclosed "with "reference to the use of this tool I3.
A preferred, but not a necessary, order 'of method steps is 'as'follows': the'shan'ks of rivets are put throughholes IIl of the stifiener sheet I. This sheet is preferabl stamped out in the form of Fig, '4, for "convenien'ce'in handling its panel portions as a unit. Slots I are lone enough so that the "short "portions -of material connecting the three panels will be of no consequence in the action of the hinge "bands to be made. The rivet shanks aretlren-passed through holes 9 of limpsheet'li. This assembly of carrying strip 8, rivets' lysheet "I and'sh'eet 5 is then laid over the tool "I3 of Fig. '6 with the sheet 5 contacting the tool "ledges I6 and I! with the rivet shanks passinginto correspondingly spaced holes M of thetool. -'Sheet5,.shown .untrimmed in Fig. 4,.need only be large 'enoughto extend to or beyond the perimeter of tool 13. "It can be trimmed to size later. On top of such assembly on tool I3 is next laid limp sheetB. This should have an overall area large enough to extend to The .lam- 1".
or beyond the periphery of tool I3. It will be noted that rivets 4 will hold the whole assembly, except sheet 6, from shifting or swiveling and that sheet 6 being on top of the laminations is under observation and -'can"be'-'e'asily arranged in proper positionywhich is merely flat to cover the tool.
With all parts placed on tool I3, in flat and loosely laminated position as stated, a flat plate electrode or an electrode shaped corresponding to tool T3 is pressed on top of the assembly positionedtontool I 3. The tool I3 is also an electrode. The plan involves pressing narrow bands of the two limp sheets of plastic material, one band a for the buffer-margin and two bands 12 for the hinge bandsapplying heat to these band portions :to heat seal their two laminations over the limited areas of such bands. Such sealing is done by welding such areas into single limp sheet form over the band areas while leaving the rest of the areas "of laminations loose and unsealed at least in the-areas of thecover panels, and preferably including the area of the back panel, for the 'efiect of the creeping action and the better appearance 'in the product asbefore stated.
The welding is preferably done by a high frequency current passed between the electrodes with the 'diel'ectriciplastic material pressed between them. The heat sealing could be done in other ways, as by 'a "heated iron corresponding to tool 13 pressing the material on said tool, but the heatin'g'is preferably done by a high frequency current passed "between electrodes through the thermoplastic material pressed between them. This is .ac'cording to theway of dielectric heating.
Itshoul'd be noted that there are recesses of depth (I between the ridges I6 and I! of tool I3. They avoid a Welding'heat on the material above the recesses while the welding is .done on the material above theridges. 'The recess I5 between ridges Il isproportionedffor holes I4 to hold the rivet shanks :in an effective .manner while the sheets laminated lie ilat across ridges I'I.
After iheat sealing, the binder case is neatly trimmed by cutting isharply :around the outer edge of limp buffer margin a, to the edge shown in Fig. 1 for example. .Instead of heat sealing binder cases 011622.17 a time, many can be heat sealed at one time. The-tool I3 .ofFig, 6 may be duplicated in onehelectrode .pla e of large area to correspond with the band areas a and b for the buffer :and hinge bands as indicatedin Fig. '7. Then the parts of many binders can be pinned by their :rivetparts '4 to :the .holes provided, as before stated in relation to Fig 6. Finally a large enough sheet :6 to .cover .the area of all the subassemblies can be laid 'on, the second electrode can be pressed down and current passed through all the band areas 'a and b to'simultaneously heat :these vportionsby dielectric heating. Fig. 7 indicates the multiple sheet resulting and of course the electrodes would 'be made to correspond. When the binding case construction of such a s'heetis trimmed as c'an be 'done by a multiple cutting die-foperation,=each case construction will be'like the single one'o'f Fig.1. The construction is particularly'adapted to this multiple or simul- -taneous finishing 'of "many-products at one time.
Referring now to modifications: Fig. 5 shows a's'tifienin'g'sheet 7' like sheet 11 of Fig. 4 except that "hinge creases I8 instead of slots like II "are provided. "The use of sheet "I' is generally like that .ofsheet 'L-the limp sheets .5 .and 6 cooperating with creases I8 instead of with slots II, to
make flexible hinge lines in the final assembly of this modification.
Fig. 8 indicates an assembly like that of Fig. 4 with the difference that stifiening sheet 22 like that of Fig. 5 is used and limp plastic sheet 5 is omitted. The sheet 22 is made of plastic material or a material that can be heat sealed with a margin of sheet 6. In this modification the peripheral bufier margin of sheet 6 area is heat sealed to a narrow peripheral margin of sheet 22 so that the loose character of lamination exists between most of the cover areas and the stifiening sheet 22. The latter is preferably heat sealed along lines just outside the hinge lines in this modification as would be useful in any case of using the stiffening sheet form of Fig. 5. In the final result the outside surface of the covers will be the same as the preferred construction of Fig. 1, but the inside surface of the covers in the modification of Fig. 8 will have a harder appearance and feel to the touch. The modification will give a lower cost construction and still retain the improved appearance and feel to the touch on the outside of the covers where it is more important to have than on the inside surface. The tool it of Fig. 6 is adapted to serve all modifications. As an electrode it is adapted for heat sealing along its flat like, narrow band ridges l6 and H, the rest of the area being recessed enough to avoid heat sealing. As above stated the type of Fig. 1 construction is the preferred one but it will be seen that various modifications may be made while retaining an important part of the invention shown in the Fig. 1 construction.
When a loose leaf binder mechanism is attached to the binder case construction by rivets t, it will itself stiffen the back portion and no back panel stifiening portion will be necessary. But it is a convenience to handle all three panels in sheet 7 as a unit. In case a permanently bound book instead of a loose leaf binder is wanted, the shanks of rivets t or equivalent parts may be shortened or be short enough in structure to be more studs for positioning the parts as stated in carrying out the method steps. The binder case construction can then be applied and fastened to permanently bound fillers in any well known way. The construction of Fig. l is, however, particularly useful for making high quality binding case construction for loose leaf binders.
Considering the quality of the preferred form of the Fig. l binder case made by the new and improved method of laminating, it has already been compared to that of said prior art Patent No. 2,390,125 of 1945. It should be compared also to the type of leather laminated binder case construction such as may be made by stitching sheets together and hand tooling the edges. Suppose the outside cover sheet were limp leather, the inside cover sheet were: also of limp leather, and cover stiilening panels were laminated between them. The fastening would commonly be done by stitching down the buffer band and hand tooling the buffer edge to give a line appearance. The resulting fine, rich leather binding would be comparatively expensive. Its fine appearance, however, is approached to a very close degree by this invention, keeping in mind that the limp sheet plastic material both as to surface decoration, to movement under finger touch, and to book wearing quality can be made substantially the equivalent of fine leather. Taking this into account, together with the fact of saving in cost of material, stitching, and hand tooling for leather binding work, the comparison with the sheet plastic work under this invention is very much in favor of the new product.
The new method may be considered as an improvement over that of said prior patent in that the new one results in a product which brings the art into much closer identity with the high quality of fine leather bindings than the one of said patent while retaining important advantages of the improvement seen in said patent.
Having disclosed the method invention, the claims are:
I claim:
1. The method of making loose leaf binder case constructions which consists in mounting two rivets at corresponding ends on a spacer strip, mounting on the strip a single stiffening sheet divided by spaced slots corresponding to hinge strips for said stiifening sheet to furnish two cover and back portion stiffening panels, mounting in the same way a limp sheet of plastic material over the stifiening strip on the spacer strip by passing the rivets through holes correspondingly spaced in the limp sheet, said stiffening sheet being of less area than the limp sheet to leave an extended peripheral margin of the latter, insorting the rivets in. correspondingly spaced holes of a heat sealing tool so that a sub-assembly is mounted on the tool with the said stiiiening sheet facing outwardly then covering said subassembly with a second limp sheet of plastic material having an overall area to cover the said stiffening sheet and the extended margin of the first limp sheet, the elements of the binder case being then laminated loosely, heat sealing the limp sheets together between the spaced slots of said stiffening sheet and all around a narrow band area adjacent the outside edge of said stiffening sheet but otherwise leaving the laminated sheets generally in unsealed condition with respect to their contacting surfaces.
2. The method of making loose leaf binder case constructions which consists in mounting two rivets at corresponding ends on a spacer strip, mounting the strip on a single stiffening sheet divided by spaced slots corresponding to hinge bands for said stiffening sheet to furnish two cover and back portion stiffening panels, mounting this unit in the same Way on a limp sheet of plastic material by passin. the rivets through holes clorrespondiingly spaced in the limp sheet, said limp sheet having an area greater than the stiffening sheet to leave an extended peripheral margin, inserting the rivets in correspondingly spaced holes of a heat sealing tool so that a sub-assembly is mounted on the tool with the said stifiening sheet facing outwardly, and placing additional stiffening sheets, and spacer strips with rivets mounted therein in spaced relation on the limp sheet by inserting the rivets in other correspondingly spaced holes of the tool, then covering all such stiifening sheets and spacer strips with a second limp sheet of plastic material having an overall area approximately equal to that of the first limp sheet, th elements of a plurality of binder cases being thus laminated loosely, simultaneously heat sealing the limp sheets together between the spaced slots of all said stifiening sheets and all around a narrow hand area adjacent the outside edge of each of said stiffening sheets but otherwise leaving the laminated sheets generally in unsealed condition with respect to their contacting surfaces, and finally cutting out of the laminated limp sheets many binding case constructions.
3. The method of making a binder case consavages struction which consists'iniproviding two pins'on a spacer strip, positioning a sheet of stiffening material having stiffening panels corresponding to two covers-and a back portion divided by flexible hinge lines in the stiffening sheet; positioning in the same manner a limp sheet of plastic material on the spacer-stripwith said pins holding through corresponding holes of the limp sheet, said assembly having the limp sheet extending beyond the edges of the stiffening sheet, laying said assembly on flat like ridges of a heat sealing tool which ridges outline a peripheral margin and hinge lines for the binder case, laying a second limp sheet'of plastic materialiover said assembly to cover all of it and then fastening the loosely laminated material by heat sealing on a peripheralmargin of both sheets of plastic material to enclose the stiffening sheet and heat sealing along the hinge lines of said stiffening sheet by pressure and heat applied in the areas corresponding to the, ridges of said heat sealing tool.
4. The method, of making a binder case which consists in grooving a sheet of stiifening material adapted for heat-"sealing, the grooving being along hinge lines to divide the sheet into cover and back panel portions, pinning said sheet in predetermined position on the face of a heat sealing tool having ridges. defining lines and a peripheral margin for, the binder case, said sheet being pinned to lie on. the tool and leave the ridges defining the peripheral margin substantially uncovered by the sheet, then laying a limp sheet of plastic, material. of large enough area to cover said. stiifening sheet all overv and beyond it to cover the last named ridges of the heating tool, then heat sealing; the sheets together on a line adjacent and around the periphery of the stiifener sheet and along the hinge lines so as to leave the laminations loose at least in the cover areas between the hinge lines and said peripheral heat sealing line.
5. The method of making loose leaf binder case constructions which consists in laying a limp sheet of an area equal to many binding cases on the plate of a heat sealing tool of corresponding area, providing holes in the limp sheet corresponding to holes in the sealing tool with a pair of such holes spaced along each axis corresponding to the longitudinalaxis of the back portion area in areas over the face of the tool on which many binder case constructions are to be made, assembling many spacer strips with rivets mounted in each adjacent opposite end and spaced to correspond with the spacing of a pair of holes along said axis, making many stifiening sheets each having cover and back panel portions provided with slots through the sheet at the sides of the back panel, and with holes through the back panel spaced correspondingly with the rivets of the spacer strips, pinning each stiffener panel to the limp sheet and to the tool in separated areas on the face of the tool by passing the rivets through corresponding holes so that the limp sheet on the tool has mounted on it said many stiffening sheets in separated areas with peripheral margins of the limp sheet around each asiii sembly, covering: the; many assemblies on said limp sheet with a second limp sheet of plastic material, heati sealingby welding the two limp sheetsxdirectly -together under, pressure and heat applied along the, peripheral bands of the sheets around the margin, of each, said assembly and through the: slots along the sides of each back panel portion, of; the: stifiener sheets and leaving such stiffener. sheets unwelded to thelimp sheets and in loosely laminated form in their pocketed positions between theswelded bands and finally separating the-many binder case constructions by cutting them apart within the welded area of the; said. peripheral, bands connecting adjacent binder case constructions asmade on the tool.
6. Thev'method of making loose leaf binder case constructions: which consists in laying a limp sheet of plastic material over the face of a heat sealing tool having spaced ridges thereon and spaced holes therein so that other spaced holes provided in the limp sheet register with the holes in the tool, mounting on the limp sheet a single stiifeningcsheet having matchingv holes to register. with the other holes, such sheet being divided by slots spaced to correspond with the ridges on the tool forsaid stiffening sheet to fur nish two cover andbackportion stifiening panels, said'stiffenin-g sheet being of less area than the limp sheet to-leave,v an extended peripheral margin of thelatter whenplaced thereon, mounting two pinsat corresponding ends on a spacer strip and passing; them not only through the holes of the'stifiener; sheet but also into the correspondingly spacedholes of the tool with spacer strip fiat against the stiffener sheet and the latter against the limpsheet. so that a sub-assembly is mounted on the limp sheet on said tool, assembling other spacer strips with rivets and pinning other stiffener sheets to the limp sheet on the tool by the rivets in like manner to form a plurality of said sub-assemblies, then covering all such sub-assemblies of stiffener sheets and spacer strips with a second limp sheet of plastic material spread over.- the. first limp sheet, the elements of a plurality of binder. cases being, thus laminated loosely, simultaneously heat sealing the limpsheets together between the spaced slots of all said stiffening sheets-and all around a narrow band area, adjacent the outside edge of each of said stiifening. sheets but otherwise leaving the laminated sheetslgenerally in unsealed condition with respect to their contacting surfaces and finally cutting outof the laminated limp sheets the many binding case constructions.
FRANK STANLEY SCHADE.
REFERENCES CITED The following referencesrare of record in the file of this'pat'ent:
UNITED STATES PATENTS Number Name Date 559,727 LEnfant May 5, 1895 2,024,881 Schade Dec. 1'7, 1935 2,177,879 Schade Oct. 31, 1939 2,390,125 Schade Dec. 4, 194-5
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Cited By (18)

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US2587034A (en) * 1949-12-31 1952-02-26 Frank G Dobbs Heat-sealing apparatus
US2629808A (en) * 1950-11-15 1953-02-24 Eastman Kodak Co Apparatus for sealing wrapping material
US2647071A (en) * 1951-05-02 1953-07-28 Nat Blank Book Co Method of making laminated case construction
US2674559A (en) * 1949-05-04 1954-04-06 Zobel Joseph Method of attaching textile tapes of slide fastener elements to plastic sheets
US2809852A (en) * 1954-09-17 1957-10-15 Smead Mfg Co Ring binder
US2831706A (en) * 1954-08-20 1958-04-22 Smead Mfg Co Book or desk file and covers
US2936518A (en) * 1956-10-22 1960-05-17 Lightolier Inc Method of forming a lamp shade
US3267980A (en) * 1964-11-18 1966-08-23 Edward B Lane Billfold and checkbook combination
US3392070A (en) * 1964-03-05 1968-07-09 Berg Electronics Inc Method and apparatus for sheathing terminals
US3414296A (en) * 1967-01-10 1968-12-03 Friedrich Schneider Picture book and method of making the same
US3572957A (en) * 1968-08-02 1971-03-30 Gerson Strassberg Ribbed-backbone binder construction
FR2075938A1 (en) * 1970-01-05 1971-10-15 Lawes Michael
US3953056A (en) * 1972-06-09 1976-04-27 Bookwrights, Inc. Bookbinding with plastic covers
US4156538A (en) * 1974-07-19 1979-05-29 Bookwrights, Inc. Cross-linked plastic book covers
US4216046A (en) * 1978-04-26 1980-08-05 Draka Plastics B.V. Manufacture of articles of polyvinyl chloride foil with sealed-in reinforcement material
US4243459A (en) * 1970-01-05 1981-01-06 Lawes Michael J A Loose leaf binders
EP0191732A1 (en) * 1985-02-14 1986-08-20 HWB Kunststoffwerke H. Weiss-Buob AG Plastic sheet envelope
US4630843A (en) * 1982-09-29 1986-12-23 Harper House, Inc. Binder

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US559727A (en) * 1896-05-05 Charles l eistfa
US2024881A (en) * 1934-12-12 1935-12-17 Nat Blank Book Co Loose leaf book and method of manufacture
US2177879A (en) * 1938-03-23 1939-10-31 Nat Blank Book Co Method of making bookbinding cases
US2390125A (en) * 1944-09-13 1945-12-04 Nat Blank Book Co Binder case construction for books

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US559727A (en) * 1896-05-05 Charles l eistfa
US2024881A (en) * 1934-12-12 1935-12-17 Nat Blank Book Co Loose leaf book and method of manufacture
US2177879A (en) * 1938-03-23 1939-10-31 Nat Blank Book Co Method of making bookbinding cases
US2390125A (en) * 1944-09-13 1945-12-04 Nat Blank Book Co Binder case construction for books

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674559A (en) * 1949-05-04 1954-04-06 Zobel Joseph Method of attaching textile tapes of slide fastener elements to plastic sheets
US2587034A (en) * 1949-12-31 1952-02-26 Frank G Dobbs Heat-sealing apparatus
US2629808A (en) * 1950-11-15 1953-02-24 Eastman Kodak Co Apparatus for sealing wrapping material
US2647071A (en) * 1951-05-02 1953-07-28 Nat Blank Book Co Method of making laminated case construction
US2831706A (en) * 1954-08-20 1958-04-22 Smead Mfg Co Book or desk file and covers
US2809852A (en) * 1954-09-17 1957-10-15 Smead Mfg Co Ring binder
US2936518A (en) * 1956-10-22 1960-05-17 Lightolier Inc Method of forming a lamp shade
US3392070A (en) * 1964-03-05 1968-07-09 Berg Electronics Inc Method and apparatus for sheathing terminals
US3267980A (en) * 1964-11-18 1966-08-23 Edward B Lane Billfold and checkbook combination
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