WO1999003545A1

WO1999003545A1 - Piece for a three-dimensional puzzle game including a waste strip with identification recesses

Info

Publication number: WO1999003545A1
Application number: PCT/CA1997/000508
Authority: WO
Inventors: Pierre Benoit
Original assignee: Distributions Muralex Inc
Current assignee: Distributions Muralex Inc
Priority date: 1997-07-15
Filing date: 1997-07-15
Publication date: 1999-01-28
Anticipated expiration: 2000-01-15
Also published as: AU3533897A

Abstract

A corner element of a puzzle game that constitutes a three-dimensional pictorial representation of a certain structure such as a building-like structure. The element comprises first and second backing members (18, 20) bonded to a flexible lithographic film. A hinge area (46) separates the first and second backing members, allowing bringing them in a corner configuration by folding the lithographic film at the hinge area. The film has an exposed image-bearing surface constituting a pictoral entity that contributes to a complete representation of the building-like structure. The corner element is made from a blank that includes a layer of backing material laminated to the lithographic film. The backing material is die-cut at controlled depth to form the first and second backing members in a spaced apart relationship, separated by a waste strip (22). Prior to assembling the puzzle pieces, the user is required to peel off the waste strip from the blank in order to form the hinge area between the first and second backing members. The waste strip includes a plurality of recesses (100) therein that allow the user to readily identify the component that needs to be removed from the blank in order to form a functional puzzle piece.

Description

TITLE: PIECE FOR A THREE-DIMENSIONAL PUZZLE GAME INCLUDING A WASTE STRIP WITH IDENTIFICATION RECESSES

FIELD OF THE INVENTION

The present invention relates to amusement devices, more particularly to a puzzle game consisting of a multitude of irregularly shaped pieces that are fitted together to form a three-dimensional pictorial representation of a building-like structure.

BACKGROUND OF THE INVENTION

A puzzle game is a well-known amusement device that tests the ingenuity and patience of the player. With commonplace puzzle games, the player is required to correctly fit together a collection of small planar pieces. Each piece has an image-bearing surface constituting an individual pictorial entity. When the various pieces of the puzzle are correctly combined, the pictorial entities visually unite to form a large complete image. These types of puzzle games have a bi-dimensional character because all the pieces are interlocked in a co-planar relationship and the resulting assemblage is flat.

To increase the satisfaction and pleasure derived from a puzzle game, toy manufacturers have developed in the past recent years puzzle games providing a three-dimensional pictorial representation of a building-like structure. Such puzzle games include wall pieces that are interlocked in a planar configuration through dovetail joints to form the walls of the building. The walls are joined to one another at the corners of the building by straight tenon and mortise joints that allow the wall pieces on either side of a corner to be united at right angle. The building walls are erected and stand on a horizontal base that is assembled from a plurality of interlocked base pieces.

The pieces of three-dimensional puzzle games are usually manufactured from polymeric foam backing having the density and thickness dimension required for bearing the weight of the building-like structure. The foam backing is laminated with lithographic film providing each puzzle piece with an image-bearing surface.

A critical element of a three-dimensional puzzle game is the ability of the planar pieces to unite at in a non-planar configuration to form corners. Prior art designs, such as European patent application 0 531,662 rely on the frictional engagement between a straight tenon and a conforming mortise to interlock the pieces into a corner configuration and prevent unwanted separation that may cause the erected puzzle structure to collapse. When the puzzle pieces are fresh the dimensional tolerances are close to nominal values which makes possible to attain a comparatively tight fit at the corner joints. Accordingly, the level of frictional engagement tenon/mortise is high enough to prevent unintended corner joints separation. However, over time, the fit tenon/mortise may loosen as a result of successive assembly/disassembly of the puzzle parts, or changes in the polymeric foam due to aging. Consequently, the puzzle structure is no longer structurally sound and may partially or totally collapse when subjected a small accidental impact.

OBJECTS AND STATEMENT OF THE INVENTION

An object of the present invention is a new corner element for use in a three-dimensional puzzle game.

Another object of the invention is an improved puzzle game utilizing the aforementioned corner element.

Yet, another object of the invention is to provide a tree-dimensional puzzle game that includes one or more pieces provided with a waste component that needs to be removed prior to use, the waste component being manufactured such as to be readily discernible by the user.

Another object of be invention is to provide a novel cutting die for die-cutting a laminated sheet into puzzle pieces, the die being configured to mark waste components that need to be removed by the user.

As embodied and broadly described herein, the invention provides a corner (for the purpose of this specification "corner" means the region of the angle formed between two non co-planar surfaces that may be at right angle or at any other non-planar angular relationship) element of a puzzle that constitutes a three-dimensional pictorial representation of a building-like (for the purpose of this specification "building" is intended to encompass the constructed edifice as well as the immediate surroundings such as the garden, fences and monuments, among others) structure, said corner element comprising: first and second generally planar backing members;

- a sheet of flexible material bonded to said first and second backing members in a face-to-face relationship therewith, said first and second backing members including respective peripheral edge portions in a spaced apart relationship defining therebetween a hinge area, whereby said backing members are capable of acquiring a non-planar angular relationship by bending movement of said sheet of flexible material at said hinge area; - a peripheral edge of said corner element including at least one joint member capable of interlocking engagement with a complementary joint member of another element of the puzzle; and

- said corner element also including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of the building structure. Most preferably, the peripheral edges of the corner element are provided with one or more joint members capable of interlocking engagement with complementary joint members of the wall pieces of the puzzle in order to unite the corner element to the planar walls of the building-like structure. The joint members have a male/female configuration.

It will be apparent that this corner construction is significantly more stable and resistant than prior art designs. Unlike the approach that relies solely on the frictional engagement between straight tenon/mortise joints to create a structural union between the walls of the building-like structure, a hinge joint provides a continuous sheet of flexible material over the corner area of the puzzle. Hence, such joint is unlikely to suffer from unintended separation in use.

It is preferred to provide the corner element with an agency for positively maintaining the first and second backing members in the corner configuration and preventing them to fold back to the planar arrangement . In one embodiment, the agency is constituted by an additional pair of backing members bonded to the sheet of flexible material and capable of mutual interlocking engagement in a co-planar relationship when the first and second backing members assume the corner arrangement. Once interlocked, the additional pair of backing members preclude the first and second backing members from acquiring their original planar relationship. As embodied and broadly described herein, the invention provides a blank (for the purpose of this specification "blank" means a semifinished product that the user must alter in order to provide a functional element) of a corner element or non-corner element for use in a puzzle that constitutes a three-dimensional pictorial representation of a building structure, said blank comprising: first and second generally planar backing members;

- an intermediate member between said first and second backing members;

- a sheet of flexible material bonded to said first and second backing members and to said intermediate member in a face-to-face relationship therewith, said intermediate member being removable from blank to form between said first and second backing members a hinge area, whereby said first and second backing members are capable of acquiring a non-planar angular relationship by bending movement of said sheet of flexible material at said hinge area;

- a peripheral edge of said blank including at least one joint member capable of interlocking engagement with a complementary joint member of another element of the puzzle; and

- said blank also including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of the building structure.

Most preferably, the blank is manufactured by laminating a sheet of backing material, such as polymeric foam to a layer of lithographic film^" providing the image-bearing surface of the corner element. The backing material is die- cut at controlled depth to form the first and second backing members in a spaced apart relationship, with a waste strip therebetween. The die-cutting operation is performed without affecting the integrity of the lithographic film. Prior to assembling the puzzle pieces, the user is required to peel off the waste strip in order to form the hinge area between the first and second backing members, so the corner element can be folded.

As embodied and broadly described herein, the invention also provides a puzzle game for assembly into a three- dimensional building-like structure including: - a first set of planar wall pieces capable of interlocking in a plane to form a first wall of the building structure; a second set of planar wall pieces capable of interlocking in a plane to form a second wall of the building-like structure, each said wall pieces including an image-bearing surface constituting an individual pictorial entity contributing to a complete representation of the building-like structure;

- a corner piece for establishing a union between said first and second walls, said corner piece including: a) first and second generally planar backing members ; b) a sheet of flexible material bonded to said first and second backing- members in a face-to-face relationship therewith, said first and second backing members including respective peripheral edge portions in a spaced apart relationship defining therebetween a hinge area, whereby said backing members are capable of acquiring a corner configuration by bending movement of said sheet of flexible material at said hinge area; c) a peripheral edge of said corner piece including a first joint member capable of interlocking engagement with a complementary joint member of a wall piece from said first set in order to unite said corner piece with said first wall, and a second joint member capable of interlocking engagement with a complementary joint member of a wall piece from said second set in order to unite said corner piece with said second wall; and d) said corner piece including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of the buildinglike structure, whereby upon assembly of said pieces the image-bearing surfaces thereof uniting visually to provide image continuity over said first wall, said second wall and said corner piece.

As embodied and broadly described herein, the invention also provides a puzzle game for assembly into a three- dimensional building-like structure including: a first set of planar wall pieces capable of interlocking in a plane to form a first wall of the building structure; a second set of planar wall pieces capable of interlocking in a plane to form a second wall of the building-like structure, each said wall pieces including an image-bearing surface constituting an individual pictorial entity contributing to a complete representation of the building-like structure;

- a blank of corner piece for use in establishing a union between said first and second walls, said blank including: a) first and second generally planar backing members ; b) an intermediate member between said first and second backing members; c) a sheet of flexible material bonded to said first and second backing members and to said intermediate member in a face-to-face relationship therewith, said intermediate member being removable from blank to form between said first and second backing members a hinge area, whereby said first and second backing members are capable of acquiring a non-planar angular relationship by bending movement of said sheet of flexible material at said hinge area in order to form said corner piece; d) a peripheral edge of said blank including a first joint member capable of interlocking engagement with a complementary joint member of a wall piece from said first set in order to unite said corner piece with said first wall, and a second joint member capable of interlocking engagement with a complementary joint member of a wall piece from said second set in order to unite said corner piece with said second wall; and d) said blank including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of the building-like structure, whereby upon assembly of said pieces the image-bearing surfaces thereof uniting visually to provide image continuity over said first wall, said second wall and said corner piece.

As embodied and broadly described herein the invention provides a blank of a piece for use in a puzzle that constitutes a three-dimensional pictorial representation of certain structure, said blank comprising: a generally planar backing member; a waste member adjacent said backing member; a sheet of flexible material bonded to said backing member in a face-to-face relationship therewith, said waste member being removable from said blank; a peripheral edge of said blank including at least one joint member capable of interlocking engagement with a complementary joint member of another piece of the puzzle; said blank also including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of >said three-dimensional structure; and said waste member including a plurality of recesses therein providing a visual differentiation between said waste member and said backing member.

Under this new aspect, most preferably, the blank manufactured by laminating a sheet of backing material to a layer of lithographic film is provided with a waste strip including a surface finish that enables the user to readily discern it. As a result, the waste components become easy to identify by the user. This manner of waste component identification is preferred to other possibilities, such as application of indicia either on the surface of the backing material or on the back surface of the lithographic film (the surface that is bonded to be backing material) used in conjunction with a backing material that is somewhat transparent to allow the indicia to be seen thereto.

In one specific embodiment, the waste component is in the form of a strip, the recessed are circular blind holes that extend only part into the depth of the portion of the backing material of the waste strip. The recesses are aligned along generally a center line of the waste strip so as to be readily identifiable. The number of recesses, their pattern and density may be selected accordance with the intended application. More specifically, the recesses may be isolated or connected to one another. The recesses may be square, circular, polygonal, rectilinear, curvilinear or of any suitable shape and configuration. Also, the dimension and density of the recesses may greatly vary. One element that must be controlled, however, is to avoid as much as possible that the recesses break the strip of waste material into smaller components. Thus, it is desired that the recesses be distributed on the strip such as to avoid structurally weakening the material such that during removal , the waste strip is peeled away as a single component.

In instances where the backing material is porous, such as when it is made of foam or any other structurally similar substance that is characterized by the presence of small cavities or interstices, the recesses should be selected such us to be easy distinguishable from the interstices already present in the material . This can be effected by providing recesses larger than the interstices and/or arranging the recesses according to be pattern that will be easy distinguishable by the user.

As embodied and broadly described herein the invention further provides a cutting die for use in the manufacture of a piece of three-dimensional puzzle game, said cutting die including : a first elongated cutting element; a second elongated cutting element spaced apart from said first elongated cutting element, a plurality of projections between said first and second cutting elements, said projections capable of creating an array of recesses in material into which said cutting die is urged. In a specific embodiment^", the cutting die elements are designed to penetrate the backing material to cut or sever that backing material at specified locations. The depth of penetration of the various sections is selected to create a complete cut only through the backing material, when a waste strip is being created. Thus, the lithographic film is not cut. More specifically, if the waste strip is in the form defined by two generally parallel sides, the cutting die will include a first element and a second element, each element being generally rectilinear, the elements being spaced from one another by a distance corresponding to the width of the waste strip. The height of each element generally corresponds to the thickness of the backing material so that when the cutting operation is effected, only the backing material will be cut, while the lithographic film remains intact.

The cutting die also comprises between the rectilinear cutting elements a plurality of projections that will create corresponding recesses in the material of the waste strip. Most preferably, those projections are cylindrical in shape in order to create recesses in the shape of circular blind holes. Preferably, the height of the recesses is less than the projection height of the cutting elements to avoid extending the recesses up to them lithographic film. This feature allows creating a clearly discernible pattern over the waste strip while avoiding to weaken the material to a point such that during removal the waste strip will separate into several pieces . BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a perspective view of a puzzle game in accordance with the invention shown in the partially assembled condition;

Figure 2 is an enlarged front elevational view of a corner element in a planar condition of the three-dimensional puzzle game shown in Figure 1 ;

Figure 3 is a rear elevational view of the corner element shown in Figure 2 ;

Figure 4 is a cross-sectional view taken along lines 4 - 4 in Figure 3 ;

Figure 5 is a bottom plan view of the corner element of Figures 1 to 4 , shown in the folded condition, i.e. forming an angle;

Figure 6 is a cross-sectional view taken along lines 4 - 4, the corner element being in folded condition;

Figure 7 is a fragmentary rear elevational view of the corner element in accordance with a variant;

Figure 8 is a plan view of a blank of a corner piece, featuring a waste strip with a plurality of recesses therein that provide a visual identification;

Figure 9 is an enlarged, fragmentary cross-sectional view of feature eight;

Figure 10 is a fragmentary plan view of a cutting die used for forming the blank depicted at figure 8;

Figure 11 is a cross-sectional view taken along lines 11-11 of figure 10.

DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention provides a corner element for use in a puzzle game that is a three-dimensional pictorial representation of a building-like structure. An example of such puzzle game is shown in Figure 1. When fully assembled the puzzle game presents the three-dimensional image of a house.

The puzzle game 10 includes two main parts, namely a constructed edifice 12 (shown in the partially assembled condition) and a horizontal base 14 supporting the edifice. The base 14 is made up of a plurality of base pieces 14a, 14b, 14c, etc., capable of interlocking in a plane. In a most preferred embodiment, the interlocking engagement is achieved by fitting the base pieces together by dovetail-type joints that feature a flaring ^"tenon fitting into a conforming mortise. Similarly, the edifice construction 12 is made from a plurality of wall pieces 12a, 12b, 12c, etc., fitted together with dovetail -type joints to form walls.

The present invention provides a corner element 16 suitable as a transition piece between adjacent vertical walls of the edifice construction 12. With reference to Figures 2 to 6, the corner element 16 includes a plurality of panels that assume a non-planar angular relationship and interlock with wall pieces forming adjacent perpendicular walls of the edifice construction 12. More particularly, the corner element 16 comprises a set of discrete backing members 18, 20, 22 and 24 in the form of planar blocks of relatively rigid polymeric foam-like material that is approximately a quarter of an inch thick. The polymeric foam should possess a sufficient rigidity and density in order to adequately bear the weight of the constructed edifice 12. The backing members 18, 20, 22 and 24 are bonded in a face-to-face relationship to a lithographic film 26 constituting an image- bearing surface of the corner element 16. The image bearing surface is a pictorial entity that cooperates visually with the image bearing surfaces of adjoining puzzle pieces to construct the image of the external surface of the house 12 or any other building-like structure represented by the puzzle game. In the example shown, the lithographic film bears the image of a brick wall . As discussed in greater detail later, the lithographic film 26 also provides a hinge function by locally bending when the backing members 18, 20, 22 and 24 move angularly one relative to the other. In selecting the material for use as the lithographic film 26, the flexibility characteristics of such material become an important factor so that the lithographic film 26 can adequately perform the function of a hinge without prematurely cracking or tearing.

The peripheral edge portions 28 and 30 of the backing elements 18 and 20 are in a spaced apart relationship defining therebetween a linear hinge area. The hinge area enables the backing elements 18 and 20 to pivot about an axis 32 (shown with dashed lines) as a result of a folding movement of the lithographic film 26 at the hinge area, in order to assume a corner configuration. The contours of the peripheral edge portions 28 and 30 define a series of complementary straight tenon and mortise joint members 32 and 34. When the backing members 18 and 20 gradually pivot about hinge line 32, the tenon and mortise joint members 30 and 32 progressively interpenetrate one another until full engagement which is achieved when the backing members 18 and 20 are orthogonal.

The backing elements 22 and 24 have a special function. They serve the purpose of locking the corner element 16 in the folded condition and preclude the main backing elements 18 and 20 from acquiring their original planar relationship. The backing elements 22 and ~24 are vertically spaced from backing elements 18 and 20 to provide sufficient clearance allowing the backing elements 22 and 24 to pivot about a horizontal hinge line 36 by folding movement of the lithographic film 26. Peripheral edge interlocking between the main backing members 18 and 20, and the backing members 22 and 24 is achieved by a set of straight tenon and mortise joint members 38 and 40, similar to joint members 32 and 34.

The backing members 22 and 24 are capable of interlocking engagement in a co-planar relationship by virtue of a flared tenon 42 and a conforming mortise 44.

The process for assembling the corner element 16 consists of pivoting the main backing members 18 and 20 about hinge line 32 in order to bring the mating edges of the backing elements 22 and 24 in adjacency. The flared tenon 42 is then inserted in the tapered mortise 44. When the interlocking engagement is completed, the backing members 22 and 24 are in a co-planar engagement. At this stage, the backing members are orthogonal to one another with the tenon and mortise joint members 32 and 43 fully engaged.

Similarly, the backing members 22 and 24 lay at right angle to main backing members 18 and 20 and the tenon and mortise joint members 38 and 40 are interlocked.

To enable the corner element 16 to mate with the wall pieces of the construction edifice 12, the periphery of the backing members 18 and 20 are^"provided with the appropriate number of male and/or female joint members 46. It will be apparent to those skilled in the art that the exact number of joint members 46 for fitting wall pieces to the corner element 16, their precise location as well as their gender (tenon or mortise) is dictated by the specific application.

In use, the corner element 16 is placed in the upright position with the backing members 22 and 24 forming the base. Wall pieces are then connected to the periphery of the backing members 18 and 20 to build-up two perpendicular walls. The images printed or otherwise impressed on the lithographic films of the corner element 16 and on the various wall pieces are related in such a way as to provide image continuity over the wall surface. Hence, an observer will perceive a continuous image, a brick wall for instance, by looking at the exposed surface of the construction edifice 12.

The method for manufacturing the puzzle game in accordance with the invention consists of designing the laminated film 26 to provide a bi-dimensional image of the outer surface of the building-like structure. The lithographic film is then adhesively bonded to a sheet of foam backing. The resulting lamination is die-cut to form in a single operation all the pieces of the puzzle game. The die-cutting of the corner elements 16 involves the step of making cutting lines in the backing material to form the internal peripheral edges of the backing members 18, 20, 22 and 24, contoured to provide the straight tenon and mortise joint members 32/34 and 38/40. This cutting operation is performed at a controlled depth in order to completely sever the backing material without, however affecting the integrity of the lithographic film 26 within the boundaries of the corner element 16. The resulting corner element 16 is only a semifinished piece because the crossing strips of backing material (not shown in the drawings) between the backing members 18, 20, 22 and 24 (extending along the hinge lines 32 and 36) preclude any hinge function. To render the corner element 16 fully functional, those strips must be peeled-off from the lithographic film 26 to provide the necessary clearance along the hinge lines. In order to allow the removal of those waste strips, the adhesive used to bond the backing material and the lithographic film should have the appropriate release properties. It should be pointed out that after the removal of the waste strip the adhesive remaining on the lithographic film can to some degree bond with the peripheral edge of the backing member that occupies the place of the waste strip when the corner element 16 is folded. This feature is best shown in Figure 6. The peripheral edge 50 of the backing member 18 engages the portion 52 of the lithographic film that previously was bonded to the waste strip. The adhesive bond between the peripheral edge 50 and the lithographic film portion 52, albeit weak, contributes to retain the backing members 18 and 20 in the corner configuration. To facilitate the identification of the waste strips that the user needs to remove from the semifinished corner element, they may be provided with a visual queue, such as a contrasting colour applied uniformly or as a pattern, or indicia in the form of combination of letters forming an intelligible message of the type "PEEL HERE", for instance. The visual queue is applied by printing, silk screening or any other appropriate process .

A variant of the corner element 16 is shown in Figure 7. The difference with the previous embodiment resides in the absence of interlocking engagement between the backing members. The vertical hinge line 46 and the horizontal hinge line (not shown in the drawings) are provided by forming between the backing members parallel walled channels 48 having a width A that is equal or exceeds the thickness of the backing material . It should be noted the backing members can be brought to the corner configuration by bending the lithographic film along either one of two possible fold lines A and B shown in the drawings. In order to specify which fold line the user should make in order to properly assemble the corner element, a visual queue 54 is printed on the lithographic film in the hinge area 46. Such visual queue is in the form of arrows pointing toward the correct fold line (line B in the example shown) . The visual queue 54 is normally hidden by the waste strip and becomes visible only when the latter is removed from the lithographic film 26. This variant is manufactured as described earlier in connection with the corner element 16 except that the pattern for cutting the inner peripheral edges of the backing members is changed.

In a further variant (not shown in the drawings) the backing members 22 and 24 provided for retaining the main backing members 18 and 20 in the folded condition, may be dispensed with. In this embodiment, the interlocking engagement with adjoining wall pieces maintains the corner element in the folded condition.

In a yet another variant (not shown in the drawings) the corner element is designed to form a multi-corner structure when assembled. For example a two-corner unit is provided by laminating the lithographic film with three backing members in a spaced apart relationship forming therebetween two hinge areas. This embodiment is particularly suitable for elevated tower structures in the puzzle game. A complete section of the tower structure, which is say square in cross-section, thus having four walls joined at right angles could be made from a single piece having five (5) horizontally aligned backing members forming between them four vertical hinges that materialize the corners of the tower section. The three intermediate backing members have a width corresponding to the transverse dimension of a tower wall . The backing members forming the ends of the tower section are designed to interlock by means of a male/female joint members in order to close the ends of tower section. The tower of the puzzle game is erected by stacking several assembled tower sections one on top of the other. The stacked sections interlock by complementary male/female joints.

Another possible embodiment designed to facilitate the identification of the waste strip is depicted at Figure 10. This figure depicts a blank of a corner element including a pair of backing members 18, 20 respectively, separated from one another by a waste strip 22. As discussed earlier, to render the corner piece fully functional, the waste strip 22 must be peeled off so as to enable the corner piece to fold along a line passing between the backing members 18 and 20. This blank features a waste strip provided with a plurality of recesses 100 whose function is to provide a visual identification of the component that the user needs to remove from the blank in order to make it functional. A highly enlarged, fragmentary view of the blank is shown at figure 9. The backing members 18 and 20 are separated from the waste strip 22 by cutting lines 102 that extends up to be interface lithographic film 26/backing member. This enables the waste strip 22 to be peeled off from the blank without affecting the integrity and the continuity of the lithographic film 26. A recess 100 is also shown at figure 9. The recess is in the form of a circular blind hole of dimensions sufficient to be easily distinguished by the user. Most preferably, the depth of the recess 100 is less than the depth of the cutting lines 102. This feature enables the waste strip to remain as a single unit for easy removal when peeled away. If the backing material is made of foam or any other material having interstices or cavities therein, the recesses 100 are preferably larger (average diameter) than the interstices to be readily identifiable.

Figure 10 is a fragmentary plan view of a cutting die that is used for forming the blank shown at figure 8. The cutting die includes a peripheral cutting element or blade 104 that is continuous and serves the purpose of forming the periphery of the blank shown at figure 8. As depicted at figure 11, the height of the cutting element 104 is such as to effect a complete cut of the backing material and of the lithographic film. Within the boundaries of the cutting element 104 are provided a pair of cutting elements 106 that are generally parallel and designed to form the cutting lines 102 defining the boundaries of the waste strip 22. The height of the cutting elements 106 is less than the height of the cutting element 104 such as to avoid cutting the lithographic film in the area of the waste strip 22. Between the cutting elements 106 are provided a plurality of generally cylindrical projections 108 that form the recesses 100. The vertical dimension of the projections 108 is less than the height of the cutting elements 106 to avoid that the recesses 100 reach the boundary lithographic film/backing member.

The puzzle piece in accordance with the invention can be modified and refined to suit specific applications, without departing from the spirit of the invention. Therefore, the above description of invention should not be interpreted in any limiting matter. The scope of the invention is defined in the appended claims and their equivalents.

Claims

WE CLAIM:

1. A blank of a piece for use in a puzzle that constitutes a three-dimensional pictorial representation of certain structure, said blank comprising: a generally planar backing member; a waste member adjacent said backing member; a sheet of flexible material bonded to said backing member in a face-to-face relationship therewith, said waste member being removable from said blank; a peripheral edge of said blank including at least one joint member capable of interlocking engagement with a complementary joint member of a piece of the puzzle; said blank also including an image-bearing surface that constitutes an individual pictorial entity contributing to a complete representation of said three-dimensional structure; and said waste member including a plurality of recesses therein providing a visual differentiation between said waste member and said backing member.

2. A blank as defined in Figure 1, comprising a cutting line between said waste member and said backing member.

3. A blank as defined in claim 2, wherein said cutting line extends to an interface backing member/sheet of flexible material .

4. A blank as defined in claim 3, wherein said recess extends to a depth less than said cutting line.

5. A blank as defined in claim 1, comprising a plurality of recesses that together provide a visual identification of said waste member.

6. A blank as defined in claim 5, wherein said waste member includes at least a portion that is strip-shaped.

7. A blank as defined in claim 6, wherein said recesses are distributed longitudinally along said portion that is strip-shaped.

8. A blank as defined in claim 7, wherein each said recess is generally cylindrical.

9. A cutting die for use in the manufacture of a piece of a three-dimensional puzzle game, said cutting die including: a first elongated cutting element; a second elongated cutting element spaced apart from said first elongated cutting element; a plurality of projections between said first and second cutting elements, said projections capable of creating an array of recesses in material into which said cutting die is urged.

10. A cutting die as defined in claim 9, wherein said projections have a height less than a height of said first and second cutting elements.