US1870528A - Corner holder for pictures or the like - Google Patents

Description

Aug. 9, 1932. L RAD@ CORNER HOLDER Fon PICTURES oa THE' LI'KL4 Jnveni'or' Filed Apr l can Ibe used only a non-ibrous cellulose membrane.

Patented Aug. 9, 1932 UNITED STATES `Pa'rau'r OFFICE Application led April 9, 1931, Serial No. 528,933, and in Germany November 27, 1929.

the drawback that they cannot be reliably se-' cured by adhesive, as the adhesive does not ycling sufcientl to the smooth surface ofthe i3 Celluloid and, urther, in consequence of its stilness, the pocket cannot follow alterations in form of the support, for example, a page of an album.

For gumming such corner holders there adhesives whichodissolve Celluloid.

The present invention obviates these drawbacks. According to the invention the upper transparent wall of the pocket consists of As a vcarrier for the layer of adhesive applied to the lower side of the pocket there is employed fibrous material, for example, pa er. To aftix this corner holder any suita le adhesive may be employed. As a non-fibrous cellulose membrane forming the upper wall of the pocket there may be used with advantage the cellulose hydrate known in commerce by the name Cell'ophane, which is very thin and 80 extremely flexible and oers a great resistance to tearing stresses. With the use of this material the application of the adhesive layer to a supplemental ply of fibrous material is very advantageous in that distortion of the non-librous cellulose membrane under the inluence o the moisture in the adhesive is prevented, so that the corner of the picture or the like inserted into the pocket has a smooth v fit on the lower wall of the pocket and the 40 latter has a smooth t on the support or backn a practical embodiment of the invention, to form thelowerwall of the pocket the folded over ends ofthe cellulose membrane forming the upper wall of the pocket are bedded between two plies of the fibrous material and secured thereto by adhesive. In this way there is obtained greater security against formation of creases in the lower wall of the 5 pocket. By being bedded between two plies of ibrous material movement of the cellulose membrane of itself is prevented, even i-the moisture in the adhesive penetrates the lower ply of brous material and reaches the cellulose membrane. Also there is obtained greater durability of the pocket. To insure a durable connection of the fibrous plies with the cellulose membrane the latter may be provided with perforations at spaced points Where the fibrous plies are gummed directly together.

To form the corner holder there may be applied to the ends of a rectangular strip of non-fibrous cellulose membrane, on one or both sides, covering pieces of fibrous material, and thereupon the ends of the strip are folded along two lines disposed at right angles to one another and extending from the middle of one longitudinal edge to the ends of the other uncovered edge portion of said membrane strip. The covered ends of the strip abut directly on one another after folding,

yso that the lower wall of the pocket thus formed is not interrupted. The covering pieces of brous material may be of rectangular form and in this case are so arranged that the uncovered portion of the strip of cellulose membrane has also the form of a rec-V tangle the length of which is twice as great as its width. There is thus obtained a pocketlilre corner holder in which the lower wall covered with fibrous material and intended to be gummed projects beyond the open end of the pocket in the form o a right-angled triangle. Alternatively, there may be employed covering pieces in the form of right-angled triangles, the arrangement being such that the uncovered portion of the strip of cellulose membrane is given the form of a right-angled isosceles triangle of which the sides disposed' at right angles to one another coincide with the lines of fold. In the pocketlike corner holder thereby obtained the triangular lower wall of the pocket isk of the same size as the u fdde with fibrous material.

In order to render p sible with simple means the production of corner holders of different sizes in quantity, according to the invention the strips of cellulose membrane er wall and is covered over its entire sur- Bussum covered with fibrous material and intended to be folded are severed to therequired size from a web of cellulose membrane and fibrous material secured together by adhesive, the' fibrous covering pieces being provided with cutaways corresponding to the form of the uncovered portions of the-strip before being gummed to the web of cellulose membrane.

Several embodiments of the invention are illustrated in the accompanying drawing.

Figs. l and 2 show in plan and in crosssection, respectively, a pocket-shaped corner holder in which the lower Wall of the pocket is provided on both sides over its entire surface with a fibrous covering.

Figs. 3 and 4 show in plan and in cross-section, respectively,v a strip of cellulose membrane provided on one side with fibrous covering pieces, the corner holder being :folded from this strip.

Fi shows a similar strip of cellulose mem rane with fibrous covering pieces on both sides.

Fi 6 shows in plan a corner holder pro duce from the strip according to Figs. 3 and 4 or according to Fig. 5.

Fig. 7 shows in plan another form of the strip of cellulose-membrane provided with fibrous covering pieces and adapted to be folded to form a pocketlike corner holder.

Fig. 8 shows in plan a corner holder formed from the stri shown in Fig. 7.

' Figs. 9 an 10 each show in plan part of a web of.cellulose membrane and fibrous material gummed together, the stri s represented in Figs. 3 to 5 or Fig. 7 being ormed in different sizes from such webs.

In the embodiment illustrated in Figs. 1 and2 there is produced by foldin a piece of cellulose membrane cut to a suita, le shape a pocketlike structure a. The upperwall b of the pocket has the form of a right-angled isosceles triangle, while the lower wall c of the pocket projects inthe form of a tongue beyond the ed e b of the upper wall. To both sides of t e lower wall c of the pocket there are gummed covering pieces d and e of fibrous material. The lower covering iece e serves as a carrier for a layer f of ad esive. The membrane constitutin the lower wall portion is provided with perorations c where the covering pieces d and e of fibrous material are gummed directly together.

The rectangular strip g of cellulose membrane shown in Figs. 3 and 4 is provided at both ends on one or both sides with rectangular covering pieces h1 and It and i* and z of fibrous material, so arranged that the uncovered portion of the strip g is in the yform of a rectangle which is of a length twice its width. To form the pocketlike corner/holder right angles to one another. These lines 1:1, k2 extend between the middle of one longitudinal edge and the ends of the other longitudinal ed e of the uncovered rectangular portion o the strip g. The folded ends of the stri abut with their longitudinal edges direct y on one another so that there results the pocket shown in Fig. 6, in which the part of the bottom wall provided with fibrous covering pieces projects beyond the edge of the upper wall of the pocket.

he strip shown in Fig. 7 consists of a piece l of cellulose membrane cut to rectangular form and two fibrous covering members m1 and m2 gummed to one side of said cellulose membrane, said pieces m1 and m2 being in the form of rightangled triangles and so arranged that the uncovered ortion of thecellulose membrane Z is in the orm of a right-an led isosceles triangle. To form the pocket 'ke corner holder shown in Fig. 8, the covered portions of the cellulose membrane are folded over so that the uncovered portion of the cellulose membrane forms the upper wall of the corner holder.

For the mass production of strips according to the embodiment lshown in Figs. 3 to 5 there may be used the web illustrated .in Fig. 9 and consisting of a cellulose membrane n and several strips o1, o2, o8, o4 composed of fibrous material and gummed to the membrane in differently s aced relation. This web is preferabl divi ed by a machine into sections along t e lines p1, p2, p3, said sections being given diiferent dimensions depending on the desired size of the corner holders to be formed.

The web illustrated in Fi 10 consists of a cellulose membrane g an two webs 1' of fibrous material gummed to both sides of this membrane said webs r bein of about the same breadth, and being eacg provided with two rows of square cutaways'of different dimensions. This composite web serves for thel mass roduction of strips according to the embo 'ment of Fig. 7, the

strips being produced by cutting the web4 along the lines t1, t, t and u1, u' and u.

In the embodlments shown in Figs. 3 to 8 the cellulose membrane may be provided with perforations similarly to those provided in the embodiment shownin Fig. 1.

What I claiin is- 1. A corner holder'for cards and the like having an upper triangular wall nd a lower triangular wall lof cellophane, the ower wallv having applied to both of its faces a layer of fibrous material, the layers of material being attached to the op osite faces of the under wall, the under wa l being perforated at intervals whereb said fibrous layers ma be gummed to eac .other through said perfbrations.

2. A corner holder for cards and the like havmg an upper triangular wall and a lower triangular wall of cellophane, the lower Wall having applied to both of its faces a layer of fibrous material, the layers of material being attached to the opposite faces of the under wall, the under wall being perforated at intervals whereby said fibrous layers may be gummed to each other through said perforations, the under wall and said fibrous layers extending outward beyond the hypotenuse of the triangular wall.

3. A blank for forming a corner holder for pictures, the blank comprising a rectangular strip of cellophane and layers of fibrous material attached to the ends of said strip, the strip being foldable on diagonal lines intersecting the middle of the strip on one side thereof, and the inner opposite corners of the layers of brous material.y

4. A blank for forming a corner holder for cards or the like comprising a rectangular strip of Vcellophane and covering pieces of fibrous material attached to the ends of the cellophane strip and having such width that the uncovered portion of the cellophane strip has the form of a rectangle with a length twice as great as its width.

5. A blank for use in forming corner holders for cards and the like comprising a rectangular strip 'of cellophane and covering pieces of fibrous material, each having the form of a right angle triangle, the cover ing pieces being disposed at the ends of said strip whereby the uncovered portion of the cellophane strip has the form of a right angle triangle and the covered portion at the end of each strip has the form of a right angle isosceles triangle of which the sides are disposed at right angles to one another and coincide with the lines of fold of the strip.

6. A blank of the character described, comprising a strip of cellophane having a web of fibrous material adherently applied thereon, the web of fibrous material being formed with cut-out portions defining squares, the composite web so formed being adapted to be 'cut longitudinally on lines intersecting the middle of said squares and transversely on lines intersecting the junction of said squares and at right angles to the first-named lines.

7 A method of producing a corner holder for cards consisting in attaching to the ends of a strip of cellophane the pieces of fibrous material, then folding the strip along two lines at right angles to one another between the middle of one longitudinal edge and the other longitudinal edge of the uncovered portion of the strip.

8. A method of making corner holders for cards and the like consisting in forming a composite web comprising a strip of cellophane and a strip of fibrous material gunnned thereto, the librous material covering portions of the cellophane strip but .eaving portions of the cellophane strip uncovered,

severing the composite strip to form blanks from which the corner piece may be made, and folding said blanks to provide a triangular corner piece having one face thereof of cellophane and one face thereof transparent and the other face thereof provided with covering portions of brous material.

9. A corner holder for cards comprising a triangular pocket of transparent membrane and having an upper wall and a lower wall, the pocket having Afibrous material attached to its lower face and projecting out beyond the opening in the pocket.

10. A corner holder for cards comprising a triangular pocket of transparent, relatively stiiip material, the pocket having an upper Wall and a lower wall and having adhesively attached to its lower wall a piece of fibrous material, the material projecting outward beyond the opening of the pocket.

In testimony whereof I hereunto aiix my signature.

LEOPOLD RABO.

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