reference will now be made in detail to the preferred embodiments of the invention , examples of which are illustrated in the accompanying drawings . referring to fig5 the folded structure 10 embodying the concepts of this invention is generally comprised of a base sheet generally 12 , with four outer sheets generally 14 connected thereto . in accordance with the invention , the base sheet 12 is substantially square and has a center 16 , four base edges 18 and four base corners 20 . the substantially square base sheet 12 has eight folds . four of the eight folds are convex base folds 22 as shown in fig5 . the convex base folds 22 extend from the midpoint 24 of the four base edges 18 to center 16 forming four base minor squares 26 . as shown in fig5 the base minor squares 26 are somewhat distorted due to the perspective of the three dimensional structure 10 ; however , as shown in fig4 the minor squares 26 are of the same general size , configuration and orientation as the outer sheets 14 . the base minor squares 26 are bounded by the convex base folds 22 and the four base edges 18 . four of the folds in the base sheet 12 are concave base folds 28 bisecting the base minor squares 26 from the center 16 to the base corners 20 to form eight base minor triangles 30 . in a preferred embodiment , two pairs of adjacent base minor triangles 30 are joined together . in such an embodiment , the structure so formed provides an improved base for a novelty structure . in accordance with the invention as embodied in fig5 four outer sheets 14 are connected to the minor squares 26 on the base sheet 12 along the base edges 18 . preferably , the outer sheets 14 are square and each approximately equal in area to one of the base minor squares 26 . fig4 shows this preferred embodiment of the outer sheets 14 . it is also preferred that the base sheet 12 and the outer sheets 14 be integrally formed from a primary square sheet 60 of uniform thickness . the formation of this preferred embodiment of the invention is illustrated in fig1 through 4 and will be described in detail in a later section of this disclosure . another embodiment of the invention would have the base sheet 12 comprised of a different material than that of the outer sheets 14 . preferably , the base sheet 12 would have a thickness greater than that of the outer sheets 14 . in accordance with the invention , the four outer sheets 14 as depicted in fig5 have concave sheet folds 32 passing from the base corners 20 bisecting the outer sheets 14 and forming eight outer sheet triangles 34 . the outer sheets 14 and the base minor squares 26 form four four - sided elements generally 36 . the reverse side of the structure of fig5 is shown in fig6 . for purposes of illustration , the folds and surfaces shown in fig5 by a number are shown in fig6 by that same number primed . for example , the base convex folds 22 in fig5 are base concave folds 22 &# 39 ; in fig6 . it should also be noted that fig6 is not merely the reverse of fig5 as both figures were constructed to clearly illustrate the structure 10 . the corners 20 &# 39 ; of fig6 would have to be moved away from each other expanding the structure 10 slightly in order that the reverse side of fig6 would be identical to the embodiment of fig5 . as shown in fig6 the folds 22 &# 39 ; are concave passing through the center 16 &# 39 ;. folds 28 &# 39 ; are convex and bisect the outer sheets 14 &# 39 ; forming the outer sheet triangles 34 &# 39 ;. the base minor triangles 30 &# 39 ; are bounded by the concave folds 22 &# 39 ; and the convex folds 28 &# 39 ;. fig7 illustrates the embodiment of fig5 and 6 in side view showing the configuration of the outer sheet triangles 34 &# 39 ;, the convex base folds 22 , the center 16 and the concave base folds 28 . in this configuration , the flexible nature of the structure is illustrated by the corners 20 &# 39 ; being separated . a preferred embodiment having special utility as the base for a puppet structure has one base minor triangle 30 per element 36 joined to an adjacent base minor triangle 30 &# 39 ;. as illustrated in fig6 two opposite pairs generally 38 of base minor triangles 30 &# 39 ; can be joined to provide this preferred embodiment . similarly , two opposite pairs generally 40 of base minor triangles 30 &# 39 ; could be joined to provide a similar structure . preferably , a puppet embodiment includes , along with a plurality of joined base minor triangles 30 , a planar projection affixed between at least one pair of the joined base minor triangles . as depicted in fig8 two planar projections 42 are affixed to the structure with each projection positioned between opposite pairs 38 ( fig6 ) of joined base minor triangles 30 on the elements 36 . as depicted in fig9 the projections 42 project beyond the elements 36 and are shaped to provide the structure with the appearance of an animal . the shape given the projections 42 and may additional members ( as for example eyes 44 , legs 46 and fringe 48 ) can be changed to impart to the puppet structure the appearance of numerous different birds , reptiles or animals . these additional members are , for the purpose of this disclosure , termed character defining means . such character defining means many include representations of hair , beaks , eyes , noses , arms , legs , or any distinguishing feature that would render to the structure of this invention the appearance of an animate character . a preferred embodiment of the invention , as depicted in fig9 comprises a folded base sheet 12 and outer sheets 14 of figs . 5 , 6 and 7 as previously disclosed including a plurality of planar character defining projections 42 affixed to a pair of opposite base minor triangles 30 . the projections 42 of fig9 are the trunk and tusks of an elephant extending outwardly from the base structure 10 and comprise a plurality of character defining projections . as depicted in fig9 eye simulating character defining means 44 are affixed to two outer sheet triangles 34 &# 39 ; adjacent the upper character defining projection 42 . legs 46 are affixed to the outer sheet triangles 34 &# 39 ;. a further preferred embodiment as depicted in fig9 would include a plurality of elongated strips shown as the fringe 48 affixed adjacent the character defining projections 42 . the appearance of these character defining means are selected to provide a distinctive appearance to the character of the structure and the arrangement shown in fig9 is merely illustrative . a preferred embodiment of the structure 10 , having special utility as a principal component of a mask , is depicted in fig1 where a first element 50 consisting of a four - sided element 36 having outer sheet triangles 35 has both base minor triangles 26 on the first element 50 affixed to adjacent base minor triangles . an illustrative preferred embodiment is depicted in fig1 and 12 with a first character defining means 52 connected to the outer sheet triangles 35 of fig1 . in the embodiment of fig1 and 12 , the first character defining member 52 is an extension of the outer sheets 35 . alternatively , outer sheets 35 could be affixed at their interior contacting surface to provide an essentially flat , planar projection ( not shown ). in addition , the outer sheets 35 could be folded inwardly and affixed in that position ( not shown ). in the latter instance , a projection differing in shape or size from outer sheets 35 could be affixed to the interior portion of outer sheets 35 and protrude therefrom . in the embodiment shown , two outer sheet triangles 34 are affixed to a character defining portion 54 of a mask . as here embodied , the character defining portion 54 depicts the eyes of an owl . a base support 56 for the mask is attached to one of the outer sheets 14 of an element 36 . the attached outer sheet 14 is opposite the element having outer sheet triangles 35 . as here embodied , the base support 56 is a planar element depicting the outline of the head of the owl . alternatively , the base support could be a paper bag ( not shown ). the placement of the folded structure 10 between the elements of the mask provides a spacial separation of those elements that enhance the three - dimensional aspects of the mask . in addition , the structure allows the components of the mask to collapse to a relatively flat structure while maintaining the appearance of the character depicted . referring now to fig1 , a blank for forming one embodiment is illustrated comprised of a primary sheet generally 60 with four primary sheet corners 62 , and four primary sheet edges 64 of equal length . the primary sheet edges 64 have midpoints 66 . the blank has two main midpoint fold lines 68 passing through the center 16 of the primary sheet 60 bisecting the sheet at the primary sheet midpoints 66 . two main diagonal fold lines 70 extend through the center 16 and the four corners 62 . main diagonal fold lines 70 comprise the concave outer sheet folds 32 and the concave base folds 28 of fig5 . four secondary fold lines 74 extend through the intersection 76 of the secondary diagonal fold lines 72 and the main diagonal fold lines 70 . while the corners 62 are depicted as being square , the blank 60 may have round corners depicted in fig1 and 4 by dashed lines 63 thereby providing the outer sheets of the final structure with rounded outer sheets . preferably , the fold lines are produced in a manner depicted in fig1 through 4 . referring now to fig1 through 4 where a method of making one embodiment of the invention is illustrataed , a primary sheet 60 is provided having four equal sides 64 , four corners 62 and a center 16 . fig1 depicts the primary sheet with the main diagonal fold lines 70 and the main midpoint fold lines 68 placed therein . the folds depicted in fig1 need not be formed prior to any other folds ; however , they do locate the center 16 and they are necessarily introduced in the final steps of forming the structure . fig2 depicts the folding of the corners 62 to the center 16 forming a second square 78 with the corners 80 of second square 78 , the midpoints 66 forming main diagonal folds along fold lines 72 . fig3 depicts the folding of the corners 80 to the center 16 opposite the surface of the second square 78 to form a third square 82 . in an embodiment of the invention where the main diagonal folds 70 and the main midpoint folds 68 are not previously placed , these folds could be formed after shaping of the third square 82 . fig4 depicts the opposite side of the embodiment of fig3 except that the size of the structure is larger to more clearly illustrate the configuration of outer sheets 14 . preferably , two pairs of base triangles 30 are then affixed and character defining means attached to the structure in a manner previously described to give the structure the appearance of an animal . where the previously disclosed method is to form a puppet structure it is preferred that two opposite pairs of base triangles ( 38 or 40 in fig6 ), one from each of four four - sided elements 36 , are affixed with character defining projections . such projections are affixed between the two pairs of base minor triangles 38 or 40 . where the previously disclosed method is to form a mask structure utilizing the base element of fig1 , the two opposite pairs 38 of base triangles are affixed to a single four - sided element 36 . character defining means are then attached to the outer sheets 35 adjacent the single element . character defining means are also affixed to the entire outer sheet 14 of the element 36 opposite the single element 35 to form a three - dimensional mask . the invention provides a structure that is simple to make , that provides a support structure that is strong and flexible that allows structures incorporating the invention to be easily assembled and stored . it will be apparent to those skilled in the art that various modifications and variations could be made to the embodiments of the invention disclosed herein without departing from the scope of the invention as defined by the appended claims .
a folded structure having utility as the base structure for fanciful novelty structures . the structure is comprised of a base sheet and four outer sheets . the base sheet has eight alternate convex and concave folds . the four convex folds pass through the center of the base sheet and the midpoint of the four sides of the base sheet . four concave folds pass through the center of the base sheet and through each of the four corners . four smaller outer sheets are connected to the outer edge of the base sheet . the outer sheets are bisected by convex folds extending outwards from the four respective corners of the base sheet . the resulting structure is a hingeable , flexible , easily - opened structure that can be folded flat making it a useful base for novelty structures .