US3707791A

US3707791A - Easel back having integral supporting structure

Info

Publication number: US3707791A
Application number: US00123714A
Authority: US
Inventors: L Levy
Original assignee: Condecor Inc
Current assignee: Condecor Inc
Priority date: 1971-03-12
Filing date: 1971-03-12
Publication date: 1973-01-02
Anticipated expiration: 1990-01-02

Abstract

An easel back for supporting a photo frame in which the structure includes a backing member, a triangular supporting member and a triangular bracing member all hinged integrally together and with the triangular members folded at the hinges and locked to form a rigid supporting leg of tetrahedron shape. The triangular members are foldable as a unit against the backing member for transport in compact, non-set-up condition. The same supporting tetrahedron serves as a leg to stand the frame for either horizontal or vertical viewing. The parts are preferably molded as a single, or integral, unit employing a plastic having a high degree of flexibility and with scorelines being molded in reduced thickness for facilitating relative bending.

Description

lJnite- States Patent 91 Levy [ 51 Jan.2,1973

[54] EASEL BACK HAVING INTEGRAL SUPPORTING STRUCTURE [75] Inventor: Leon M. Levy, Chicago, Ill.

[73] Assignee: Condecor, Inc., Mundelein, Ill.

[22] Filed: March 12, 1971 [21] Appl. No.: 123,714

3,355,828 Betz 3,357,671 12/1967 Ketterer...

3,540,146 11/1970 Watkins 3,529,371 9/1970 Moore ..40/l20 FOREIGN PATENTS OR APPLICATIONS 113,330 2/1918 Great Britain ..40/124.l

Hitch ..248/463 Primary Examiner-Robert W. Michell Assistant Examiner-Wenceslao J. Contreras Attorney-Wolfe, Hubbard, Leydig, Voit & Osann [5 7 ABSTRACT An easel back for supporting a photo frame in which the structure includes a backing member, a triangular supporting member and a triangular bracing member all hinged integrally together and with the triangular members folded at the hinges and locked to form a rigid supporting leg of tetrahedron shape. The triangular members are foldable as a unit against the backing member for transport in compact, non-set-up condition. The same supporting tetrahedron serves as a leg to stand the frame for either horizontal or vertical viewing. The parts are preferably molded as a single, or integral, unit employing a plastic having a high degree of flexibility and with scorelines being molded in reduced thickness for facilitating relative bending.

11 Claims, 8 Drawing Figures competitive business, and the need has existed for a long time for a high quality easel back of sturdy construction made up of a number of relatively foldable parts easily set up by the user but produced in a single, low coast manufacturing step.

It is accordingly an object of the present invention to provide an easel back meeting these requirements, which avoids the cheap appearance of conventional backs which have been stamped out of cardboard stock but which may, nevertheless be produced in quantity at a cost equal to or lower than the cost of the cardboard product. It is another object to provide an easel back which has a long useful life and which may be repeatedly set up and collapsed without the hinge deterioration encountered in cardboard construction.

Other objects and advantages of the invention will become apparent upon reading the attached detailed description and upon reference to the drawing in which:

FIG. 1 is a rear perspective view of a photo frame and easel back constructed in accordance with the present invention.

FIG. 2 is a rear face view of the easel back of FIG. 1.

FIG. 3 is a right-hand side view.

FIG. 4 is a left-hand side view.

FIG. 5 is a top view, in partial section, looking along the line 5-5 in FIG. 4.

FIG. 6 shows the easel back of FIG. 2 in its original condition, fresh from the mold.

FIG. 6a is a fragmentary section takenalong line 6a-.-6a in FIG. 6.

FIG. 7 is a view similar to FIG. 6 but showing the supporting structure folded into a nested or flatly overlapping position for transport or when the easel feature is not required.

While the invention has been described in connection with a preferred embodiment, it will be understood that I do not intend to be limited to the particular embodiment shown but intend, on the contrary, to cover the various alternative and equivalent constructions included within the spirit and scope of the appended claims.

Turning to FIG. 1 there is shown an easel back 10 fitted into a frame 11, the frame per se being conventional and made up of a channel of thin metal mitered at

positions

12, 13 and bent into rectangular shape, being open at the bottom 14. As shown in FIG. 5, the width of the opposed grooves defined by the channel cross section is fully occupied by a stack or sandwich" which consists of a glass outer layer 15, the photograph or the like 16, and one or more filler sheets 17 which may be sheets of conventional cardboard, all cut to a size to fit the frame. For the purpose of taking up any remaining space and to insure frictional retention of the stack, the easel back is preferably provided with a set of four knobs or protuberances 18 which bear.

against the back wall of the channeled frame. It will be apparent that the opposed channels forming the sides of the frame present inwardly facing grooves into which the back 10 slides,from below, with tongue-and-groove engagement.

In accordance with the present invention a triangular supporting member is provided, integrally hinged to the backing member, and a triangular bracing member is provided, integrally hinged to the supporting member, so that they form, in folded condition, a supporting tetrahedron, with means for anchoring one edge of the bracing member to the central portion of the backing member for a rigid locking of the members into the tetrahedron shape. Thus, referring to the drawing, the supporting member, indicated at 20, has a first edge 21, a second edge 22 and a third edge 23. The junction of the

edges

22, 23 are rounded to provide a point of support 24. The first edge 21 of the triangle 20 is integral with the backing member 10 and is defined by an in tegrally formed scoreline of reduced thickness to facilitate bending.

Integrally connected to the supporting member 20 is bracing member 30 having a first edge 31, a second edge 32 and a third edge 33. The edge 31, shared by the connected members, is, as shown in FIG. 6a, also in the form of an integrally molded scoreline for localized bending.

Further in accordance with the invention an integrally molded embossment is provided at the central portion of the backing member presenting a groove which is engaged by a bendable tab integrally secured along the edge 32. In the present instance the tab, indicated at 34, has a hinge connection 35 in the form of a scoreline indented from the opposite side of the sheet, permitting the tab to assume a position face-toface with the back surface of the member 10. The embossment which receives the tab, and which is in dicated at 40, has an angled groove 41 of semi-circular shape which is adjacent the plane of the backing member. The thickness of the groove 41 is preferably such as to freely accomodate thickness of the tab since the natural resilience of the material at the hinge positions is such as to force the tab more securely into its fully inserted position.

It is one of the further features of the present construction that the hinge 21 at the first edge of the supporting member 20 is spaced inwardly from the ad- 45 jacent lateral edge of the backing member to provide clearance when the backing member is inserted into the frame in tongue-and-groove relationship. Thus, referring to FIG. 6 the hinge line 21 is parallel to, and is spaced inwardly from, by a distance d1, the left-hand lateral edge 10a of the backing member 10. The inward offset is greater than the distance of frame overlap 42 indicated at d2. Thus when the supporting member 20 is bent out of the plane of the backing member 10 there is adequate clearance for free insertion of the backing member into the frame.

Still further in accordance with the invention an aperture, or cutout 50 is provided in the bracing member 30 so that when the

members

20, 30, 34 are bent as a unit, through an angle of the supporting structure is nested flatly against the surface of the backing member with the embossment 40 mated with the cutout. If desired, the cutout 50 may be sized to snuggly embrace the embossment or may be slightly detented with respect to the embossment when in folded condition so that the supporting structure snaps over the embossment with detent action. However, it is found that even without detenting, the supporting structure tends to lie flatly against the backing member as shown in FIG. 7, providing a high degree of compactness when the structure is transported and until easeled support is required.

In use the supporting structure is flipped from the condition shown in FIG. 7 and the two

triangular members

20, 30 are bent along the

hinge lines

21, 31 so that they and the backing member together form a supporting tetrahedron with the tab 34 being inserted edgewise into the groove 41 to lock the members in their supporting positions. Setup takes but an instant and is sufficiently straightforward so that it may be carried out by either adults or children without necessity for any assembling instructions.

The present construction is ideal for photo frames intended for portable usage and requiring repeated bending at the hinge lines. Preferably a flexible plastic such as polyethylene is used, permitting many hundreds or even thousands of bending cycles without noticeable deterioration. Thus the construction is to be distinguished from easels formed of cardboard sheet stock punched and scored as in conventional designs. An easel back of the present construction, integrally molded in plastic, not only is more durable than its cardboard counterparts but it gives the impression of quality and durability avoiding the cheap appearance associated with use of conventional cardboard, even though the cost of manufacture does not, in quantity production, exceed the cost of the cardboard which it replaces.

It is one of the features of the present construction that the point of easeled support 24 is spaced inwardly about the same amount from two adjacent lateral edges, permitting a photograph in the frame to be viewed either vertically, as shown in FIG. 1, or horizontally; Thus when the frame is vertical and supported along the bottom edge 14, the remote edge 24 of the supporting member 20 bears edgewise against the sup porting surface. When the frame is turned so that the side a of the backing is lowermost, the region 24 still acts as a point of outboard support, but in a plane at 90 to the original plane of support.

While it is preferred to employ a well-defined scoreline 31 between the supporting member and bracing member for abrupt hinging action, it will be understood that the invention in certain aspects is not limited thereto and contemplates the possibility of having a gradual curving bend in the region 31 providing a gradual transition between the angled surfaces when the device is set up, making use of the flexibility of the plastic material of which the assembly is made. This would, of course, cause the supporting tetrahedron structure to present a rounded rather than relatively sharp upper edge, but the rigidity and security of the support, provided the tab 34 is securely tucked into the embossment 40, would remain unaffected. Accordingly, the term hinge, as used herein, is to be broadly interpreted as a region where bending takes place incident to set-up without limitation as to the sharpness of the bend.

It will be apparent, with the above teachings in mind, that other minor changes may be made in the construction without departing from the invention. Thus the two

triangular members

20, 30 may be altered in size or effectively shifted with respect to one another along the common hinge line 31. If desired, the edge 33, may be extended to the left (P16. 6) so that both of the triangles have an apex at the region 24 for maximum strength and rigidity. Then too, the member 30 may be further increased in size, with extension along the line of the hinge 31 as viewed in FIG. 6, so that the member 30 extends beyond the point of support 24, whereupon the apex of the triangle 30 will engage the supporting surface. Alternatively the

triangles

20, 30 may be trimmed, for example, to eliminate, in one or both, the portion which is above and to the right of the section line 6a-6a in FIG. 6 thereby converting the triangles to members more aptly characterized by the term truncated triangles or trapezoids. Thus the term triangular as used herein includes within its scope truncated triangles, and the term tetrahedron includes within its scope truncated tetrahedrons.

The term sharply angled" used in defining the bent positions of the

members

20, 30 refers to an included angle, at the hinge 31, which is preferably acute but which does not, in any event, greatly exceed a right angle.

What I claim is:

1. An easel back for supporting a photo frame, comprising, in combination, a rectangular backing member having lateral edges, a triangular supporting member having first, second and third edges, the first edge of the supporting member having a hinge connection with a lateral edge of the backing member, the hinge at the first edge of the supporting member being spaced inwardly from the adjacent lateral edge of the backing member and arranged parallel thereto to provide clearance for the cooperating edge of the frame when the backing member is inserted into the frame in and groove relationship, a triangular bracing member having first, second and third edges, the first edge of the bracing member having a hinge connection with the second edge of the supporting member, the hinge connection permitting the triangular members to be bent into tetrahedron shape with a projecting point of the tetrahedron defining a point of easel supporting which is behind the backing member and spaced inwardly from a lateral edge thereof, and means for anchoring the second edge of the bracing member to the central portion of the backing member to rigidfy the tetrahedron.

2. The combination as claimed in claim 1 in which a hinged tab is provided on the second edge of the bracing member and in which means are provided on the backing member for engaging the tab.

3. The combination as claimed in claim 2 in which the central portion of the backing member has formed thereon an embossment defining a groove adjacent the plane of the backing member for receiving the tab.

4. The combination as claimed in claim 3 in which the bracing member has an aperture formed therein for matingly receiving the embossment when the supporting member, bracing member and tab are folded as a flat unit about the hinge on the first edge of the supporting member to lie flatly against the backing member for transport.

5. The combination recited in claim 2 in which the members are all formed of flexible plastic integrally with one another with the hinges being in the form of scorelines defining regions of reduced cross section for localized bending between the members.

6. The combination as claimed in claim 1 in which the point of the tetrahedron projects behind the backing member and is spaced inwardly from both adjacent edges on the backing member by approximately the same amount for tilting support about either one of the adjacent edges.

7. The combination as claimed in claim 1 in which the supporting member extends beyond the bracing member at the hinge between the two members so that the supporting member engages the supporting surface.

8. An easel back for supporting a photo frame, comprising, in combination, a rectangular backing member having lateral edges, a triangular supporting member having first, second and third edges, the first edge of the supporting member having a hinge connection with a lateral edge of the backing member, a triangular bracing member having first, second and third edges, the first edge of the bracing member having a hinge connection with the second edge of the supporting member, the hinge connection permitting the triangular members to be bent into tetrahedron form with a projecting point of the tetrahedron defining a point of easel support which is behind the backingmember and placed inwardly from a lateral edge thereof, a hinged tab provided on the second edge of the bracing member, an embossment formed on the central portion of the backing member and defining a groove adjacent the plane of the backing member for receiving the tab to rigidfy the tetrahedron, said bracing member having an aperture formed therein for matingly receiving the embossment when the supporting member, bracing member and tab are folded as a flat unit about the hinge on the first edge of the supporting member to lie flatly against the backing member for transport.

9. The combination as claimed in claim 8 in which the hinge at the first edge of the supporting member is spaced inwardly from the adjacent lateral edge of the backing member and arranged parallel thereto to provide clearance for the cooperating edge of the frame when the backing member is inserted into a frame in tongue-and-groove relationship.

10. The combination as set forth in claim 8 in which the members including the mating aperture and embossment are all molded of plastic integrally with one another with the hinges being defined by scorelines of reduced cross section between the members.

1 l. A photo frame and support assembly comprising, in combination, a rectangular frame defining grooves in the opposed edges thereof, a rectangular backing member having lateral edges for slidable tongue-and groove reception in said grooves, said backing member having a supporting member hinged to the backing member and having a bracing member hinged to the supporting member with the supporting and bracing members having provision for locking in place to form a rigid outboard support for supporting the frame in tilted position along one of its edges, the members being formed of flexible material integrally with one another and the hinges being formed by scorelines defining regions of reduced cross section, the hinge between the backing member and supporting member being parallel to the adjacent lateral edge of the backing member but being offset inwardly from said lateral edge to permit free insertion'of said lateral edge into the cooperating groove.

Claims

8. An easel back for supporting a photo frame, comprising, in combination, a rectangular backing member having lateral edges, a triangular supporting member having first, second and third edges, the first edge of the supporting member having a hinge connection with a lateral edge of the backing member, a triangular bracing member having first, second and third edges, the first edge of the bracing member having a hinge connection with the second edge of the supporting member, the hinge connection permitting the triangular members to be bent into tetrahedron form with a projecting point of the tetrahedron defining a point of easel support which is behind the backing member and placed inwardly from a lateral edge thereof, a hinged tab provided on the second edge of the bracing member, an embossment formed on the central portion of the backing member and defining a groove adjacent the plane of the backing member for receiving the tab to rigidfy the tetrahedron, said bracing member having an aperture formed therein for maTingly receiving the embossment when the supporting member, bracing member and tab are folded as a flat unit about the hinge on the first edge of the supporting member to lie flatly against the backing member for transport.

11. A photo frame and support assembly comprising, in combination, a rectangular frame defining grooves in the opposed edges thereof, a rectangular backing member having lateral edges for slidable tongue-and-groove reception in said grooves, said backing member having a supporting member hinged to the backing member and having a bracing member hinged to the supporting member with the supporting and bracing members having provision for locking in place to form a rigid outboard support for supporting the frame in tilted position along one of its edges, the members being formed of flexible material integrally with one another and the hinges being formed by scorelines defining regions of reduced cross section, the hinge between the backing member and supporting member being parallel to the adjacent lateral edge of the backing member but being offset inwardly from said lateral edge to permit free insertion of said lateral edge into the cooperating groove.