GB2275790A - Preclosed cardboard slide mount - Google Patents

Abstract

A cardboard slide mount includes a base (16), a cover (12) and a pocket (14) between the base and the cover. The base and cover, which include aligned film windows 20, form opposing first and second rectangular flames for a film transparency, with the pocket (14) forming a nest for the film transparency. Outer corners of the base are rounded. Opposing inner surfaces of the base and cover are adhesively bonded together about three sides (62C, 62D) so that a fourth side defines an insertion opening. The insertion opening allows the film transparency to be inserted into the film nest. A chamfered outer corner of the cover exposes a rounded corner of the base, which permits an opening assembly to separate the base from the cover along the fourth side and thereby allow a film transparency to pass through the insertion opening and into the film nest. A first adhesive region, preferably heat-sensitive adhesive, thereafter connects the opposing inner surfaces of the base and cover along the fourth side. A second adhesive region (64A), preferably pressure sensitive adhesive, in the film nest secures one edge of the film transparency so as to maintain an alignment of the film transparency and the film windows. <IMAGE>

Description

PRECLOSED CARDBOARD S~J,r MOUNT BACKGROUND OF THE INVEWflON The present invention relates to a slide mount for mounting film transparencies from a photographic film web to prepare a photographic slide.

In particular, the present invention relates to an improved partially closed cardboard slide mount which has a side opening for insertion of a film transparency.

Photographic film transparencies are generally severed from a photographic film web and mounted in individual slide mounts to prepare photographic slides. The photographic image of the prepared photographic slide is then viewed in cooperation with a slide projector or other visualizing means.

Slide mounts used in the industry are generally made from either plastic or cardboard. Plastic slide mounts are generally formed of first and second plastic frame portions which are connected along three edges of an outer border to form a pocket therebetween. The plastic slide mounts include a central aperture which is formed by film windows in each of the first and second plastic frame portions. Further, the slide mount includes a slit along a fourth edge of the outer border. The slit provides an opening through which a photographic film transparency is inserted into the pocket between the first and second frame portions. The fourth edge of the first and second frame portions is easily spaced apart by an opening assembly, which allows an individual film transparency to be quickly and efficiently inserted into the pocket of the slide mount.Because the plastic has shape memory, the first and second plastic frame portions return together along the fourth edge upon leaving the opening assembly to form a seal of the opening.

Cardboard slide mounts are typically significantly less expensive than plastic slide mounts. Cardboard slide mounts are generally formed by first and second frame portions which are connected by a hinge. A spacer is usually bonded to an inner surface of the first frame portion so as to create a nest for the film transparency around a central rectangular aperture of the slide mount.

With the first and second frame portions open in a butterfly-like position, the film transparency is placed in the film nest. The second frame portion is then folded atop the first frame portion, and the opposing inner surfaces of the first and second frame portions are bonded together about all four edges of the slide mount to secure the film transparency therein. This method of loading a film transparency into a cardboard slide mount is typically relatively slow as compared to the previously described method of loading a plastic slide mount.

With the film transparency secured within the slide mount, a photographic image of the film transparency should align with the film windows of the first and second frame portions. Thus, it is important that the film be correctly aligned and secured within the slide mount with the entire photographic image visible through the aperture of the slide mount. In some cardboard slide mounts, however, the film transparency is left unconnected within the film nest so that the photographic image can shift and become partially obscured by the rectangular aperture.

It is also important that the film transparency be capable of adapting to temperature variations occasioned by the intense heat of a light source of a slide projector. In some cardboard slide mounts, the film transparency is secured to the slide mount about all four edges of the film.

When such a slide mount is placed in the slide projector's light source, extreme heat from the light source causes the film to expand and buckle, which in turn causes the projected photographic image to become out of focus.

SUMMARY OF THE INVENTION The present invention is a preclosed cardboard slide mount which includes a base with a first film window and a cover with a second film window. The cover is bonded to the base with the first and second film windows aligned. So bonded, a film nest is defined between the base and cover, and an insertion opening is defined along a first side of the slide mount.

The insertion opening communicates with the film nest and allows a film transparency to inserted through the insertion opening and into the film nest.

A first adhesive layer is positioned in the film nest along one of the film windows so as to hold one edge of the film transparency when the film transparency is positioned in the film nest. The preclosed cardboard slide mount of the present invention is therefore able to be quickly loaded with a film transparency through the insertion opening in a manner similar to plastic slide mounts. Once loaded, the first adhesive layer in the film nest secures only one edge of the film transparency, which allows the film transparency to expand without buckling in response to the heat of a slide projector's light source.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an enlarged perspective view of the preclosed cardboard slide mount of the present invention.

Figure 2 is a top view of the cardboard slide mount of Figure 1 in an unfolded condition.

Figures 2A-2C are cross-sectional views of the preclosed cardboard slide mount of Figure 2 taken along lines 2A-2A, 2B-2B and 2C-2C, respectively.

Figure 3 is a top view of a cardboard sheet from which the cardboard slide mount of Figure 2 is prepared.

Figure 4 is a top view of the cardboard slide mount of Figure 2 with adhesives applied to the cardboard.

Figure 5 is partially assembled top view of the cardboard slide mount of Figure 4.

Figure 6 is a completely assembled top view of the cardboard slide mount of Figure 5.

Figure 7 is a cross-sectional view of the cardboard slide mount of Figure 6 taken along line 7-7.

Figures 8A-8C are greatly enlarged perspective views of a corner of the cardboard slide mount of Figure 6 as it enters an slide mount opening assembly.

Figure 9 is an enlarged perspective view of the cardboard slide mount of Figure 6 positioned on a slide mount opening assembly near a position for insertion of a film transparency.

Figure 9A is an enlarged perspective view of the cardboard slide mount of Figure 9 with the slide mount opening assembly partially removed to demonstrate insertion of a film transparency.

Figure 9B is a greatly enlarged cross-sectional view of the slide mount of Figure 9A taken along line 9B-9B.

Figure 10 is a top view of the slide mount of Figure 9A with a cover of the slide mount partially cut away to show the film transparency sealed within the slide mount.

Figure 11 is an exploded view of a second embodiment of the preclosed cardboard slide mount of the present invention.

Figure 12 is a partially assembled top view of the slide mount of Figure 11 with one preferred adhesive pattern.

Figure 13 is a partially assembled top view of the slide mount of Figure 11 with an alternative adhesive pattern.

Figure 14 is a top view of another alternative embodiment of the cardboard slide mount of Figure 11.

Figure 15 is a top unassembled view of a third embodiment of the improved cardboard slide mount of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Figure 1 is a perspective view of cardboard slide mount 10 of the present invention. Cardboard slide mount 10 generally includes cover 12, spacer 14 and bottom 16. Cardboard slide mount 10 also includes outer edge 18 and inner edge 20, which generally defines border 22. Inner edge 20 further defines central aperture 24, which extends from cover 12 to bottom 16. Central aperture 24, which is rectangular in shape, provides a crisp edge for a projected picture when cardboard slide mount 10 is in use. In one preferred embodiment, corners 26A, 26B and 26C of cover 12 are radiused, while corner 26D is chamfered.

Figure 2 is a top view of cardboard slide mount 10 of Figure 1 in an unassembled condition. As shown in Figure 2, cover 12, spacer 14 and bottom 16 are formed from a unitary piece of cardboard material with fold line 30 dividing cover 12 and bottom 16, and fold line 32 dividing bottom 16 and spacer 14. As can be seen, bottom 16 is generally a mirror image of cover 12.

Thus, like corners 26A-26C of cover 12, corners 34A-34C of bottom 16 are radiused. Unlike corner 26D of cover 12, however, corner 34D of bottom 16 is radiused in a similar manner as corners 34A-34C.

Spacer 14 includes outer edge 36, which defines radiused corners 38A-38D, and inner edge 40, which defines opening 42. Opening 42 is larger than aperture 24 such that border 44 of spacer 14 is narrower than border 22 of cover 12 and bottom 16. Opening 42 is generally sized to accept an individual film transparency. As can be seen, inner edge 40 of opening 42 is flared slightly near fold line 32.

In one preferred embodiment, cardboard slide mount 10 of Figure 2 is formed from SBS-MD bleach stock cardboard which is known in the art.

Figures 2A-2C are cross-sectional views of cardboard slide mount 10 of Figure 2. As shown in Figures 2A-2C, outer edges 18 and 36 of cardboard slide mount 10 are formed by a cutting die which cuts in a direction from outer side 50 to inner side 52 of cardboard slide mount 10. As a result of this cutting direction, outer edges 18 and 36 include curved surface 54 which is directed towards outer side 50. Inner edges 20 and 40, however, are formed by a cutting die which cuts in a direction from inner side 52 to outer side 50. As a result of this cut, curved surface 56 of edges 20 and 40 is directed towards inner side 52. In a preferred embodiment, outer side 50 and inner side 52 define a cardboard thickness of about 0.015 millimeters. The orientation of the abovedescribed cuts is such that the grain of the cardboard runs generally from spacer 14 to cover 12.

Figure 3 is a top view of cardboard sheet 60, which is used to form a plurality of cardboard slide mounts 10. Immediately prior to cutting, cardboard sheet 60 is processed so as to apply a first adhesive in the form of adhesive regions 62A, 62B and 62C to inner side 52 in the vicinity of each spacer 14, bottom 16 and cover 12, respectively, of each cardboard slide mount 10. In addition, a second adhesive in the form of adhesive regions 64A and 64B is applied in the vicinity of each bottom 16 and cover 12, respectively, of each cardboard slide mount 10. The first adhesive is also applied to outer side 50 of spacer 14 in a pattern which will be described later.

The first adhesive forming regions 62A-62C is preferably a heat seal adhesive commonly known in the art. In one preferred embodiment, the second adhesive forming regions 64A-64B is preferably a pressure-activated, micro-encapsulated adhesive, also commonly known in the art. Once adhesive regions 62A-62C and adhesive regions 64A-64B are applied, cardboard sheet 60 is further processed to create fold lines 30 and 32. Apertures 24 and opening 42 of each cardboard slide mount 10 are then cut in the direction and manner previously described. As oriented in Figure 3, sheet 60 is further cut along horizontal lines 66 in the direction and manner previously described, to separate the plurality of cardboard slide mounts 10 into adjacent pairs. Finally, vertical cuts are made along lines 68 in the manner and direction previously described to separate adjacent pairs of cardboard slide mounts 10.Cuts along lines 66 and 68 further define contours of outer edges 18 and 36 as described relative to Figure 2. Each cardboard slide mount io is then assembled in a manner to be described.

Figure 4 is a top view of cardboard slide mount 10 in an unassembled state to show adhesive regions 62A-62C and 64A-64B applied to inner side 52 of cardboard slide mount 10. As shown in Figure 4, adhesive region 62A of spacer 14 completely covers inner side 52 of border 44.

Adhesive region 62B is a mirror image pattern of border 44 of spacer 14.

Because border 44 is narrower than border 22, adhesive region 62B is spaced from inner edge 20 of bottom 16. Adhesive region 62C of cover 12 generally defines U-shaped pattern 70. Ends 72 of U-shaped pattern 70 are spaced from outer edge 74 of cover 12 by about 0.625 inches. Inner edge 70A of U-shaped pattern 70 is spaced from inner edge 20 of cover 12.

Adhesive region 64A is located between inner edge 20A and adhesive region 62B of bottom 16. Adhesive region 64B is located adjacent to outer edge 74. Adhesive strip 64B preferably has a width of approximately 0.3 inches.

Figure 5 is a top view of cardboard slide mount 10 with inner side 52 of spacer 14 folded against inner side 52 of bottom 16. As shown in Figure 5, bottom 16 has a width W1 which is slightly greater than width W2 of spacer 14. This assures that outer edge 36 of spacer 14 does not extend beyond outer edge 18 of bottom 16 in the event spacer 14 is slightly misfolded.

Opening 42 of spacer 14 frames aperture 24 of bottom 16 to create film nest 76, with adhesive region 64A exposed between inner edge 20A of bottom 16 and inner edge 40 of spacer 14.

Figure 5 also shows that outer side 50 of spacer 14 includes adhesive region 62D in U-shaped pattern 78 about border 44 of spacer 14.

Ends 80 of U-shaped pattern 78 are generally aligned with the taper of opening 42. U-shaped pattern 78 of adhesive region 62D is generally a mirror image of U-shaped pattern 70 of adhesive region 62C.

Figure 6 is a top view of cardboard slide mount 10 with inner side 52 of cover 12 folded against outer side 50 of spacer 14. Once cover 12 is folded atop spacer 14, heat sufficient to activate adhesive regions 62A-62D is applied to cardboard slide mount 10, which bonds inner side 52 of spacer 14 to outer side 50 of bottom 16 to form base 83. In addition, inner side 52 of cover 12 becomes partially bonded to outer side 50 of spacer 14 about U-shaped patterns 78 and 70. Adhesive regions 64A and 64B are not activated by the heating of cardboard slide mount 10. As a result, cover 12 remains unbonded to base 83 along edge 74, which permits insertion of an individual film transparency into film nest 76. Figure 6 also shows that corner 83A of base 83 is exposed by virtue of the chamfered cut of corner 26D of cover 12.

Figure 7 is a cross-sectional view of cardboard slide mount 10 of Figure 6 taken along lines 7-7. For illustration purposes, cover 12 is shown slightly spaced from base 83. As shown in Figure 7, insertion opening 84 exists between cover 12 and base 83. Insertion opening 84 communicates with film nest 76, which allows an individual film transparency to be passed through insertion opening 84 and into film nest 76. Thereafter, under suitable pressure to activate the second adhesive, an edge of the individual film transparency is secured within film nest 76 along adhesive region 64A, and cover 12 is bonded to base 83 along adhesive region 64B. Adhesive region 64A serves to hold the individual film transparency in a fixed position within film nest 76. By being secured only along adhesive region 64A, the individual film transparency is capable of expanding and contracting when subjected to extreme temperatures produced by a light source of a slide projector so as to avoid any warping of the film transparency which might affect the focus of the projected picture.

Cardboard slide mount 10 has a finished thickness of about 0.050 millimeters.

Figures 8A-8C are greatly enlarged perspective views of cardboard slide mount 10 which demonstrate one preferred manner of preparing cardboard slide mount 10 to accept an individual film transparency. Generally, cover 12 is separated from base 83 along edge 74 so as to expose insertion opening 84 and permit a film transparency to be inserted into film nest 76. As shown in Figure 8A, cardboard slide mount 10 is placed on slide mount opening assembly 88. Slide mount opening assembly generally includes base 90, ledge 91 and wedge 92. Base 90 includes beveled edge 94 which, as viewed in Figure 8A, is beneath wedge 92. Beveled edge 94 of base 90 cooperates with ledge 91 to form slot 93. Wedge 92 is slightly elevated above base 90, which permits base 83 of cardboard slide mount 10 to pass beneath lower edge 96 of wedge 92.T Leading edge 99 of ledge 91 extends beyond leading edge 100 of wedge 92 so that corner 83A of base 83 is engaged by ledge 91 before leading edge 100 of wedge 92 engages corner 26D of cover 12. Thereafter, slot 93 is designed to accept edge 98 of base 83.

As shown in Figure 8B, cardboard slide mount 10 moves in the direction of the arrow with leading edge 99 of ledge 91 directing radiused corner 83A of base 83 into slot 93 before leading edge 100 of wedge 92 contacts corner 26D of cover 12. Slot 93 thereafter deflects edge 98 of bottom 83 downward in the direction of beveled edge 94 of base 90. Thus, as a result of the chamfering of corner 26D of cover 12, edge 98 of base 83 is separated from edge 74 of cover 12 before leading edge 100 of wedge 92 contacts corner 26D of cover 12. This assures that inner side 52 of cover 12 is slightly exposed before leading edge 100 of wedge 92 engages inner side 52 of cover 12.

As shown in Figure 8C, as cardboard slide mount 10 continues moving in the direction of the arrow, inner side 52 of cover 12 is carried up ramped surface 102 of wedge 92 so as to direct outer edge 74 of cover 12 away from edge 98 of base 83. Cardboard slide mount 10 continues along slide mount opening assembly 88 in the direction of the arrow until edge 74 of cover 12 is resting on surface 104 of wedge 92.

Figure 9 is an enlarged perspective view of cardboard slide mount 10 with slide mount opening assembly 88 partially cut away to demonstrate the insertion of a film transparency. As shown in Figure 9, with edge 74 of cover 12 resting on surface 104, insertion opening 84 is thereby exposed. Space 105, between surface 104 and ledge 91, communicates with insertion opening 84 to allow an individual film transparency to enter insertion opening 84 and pass into film nest 76.

Figure 9A is an enlarged perspective view of cardboard slide mount 10 of Figure 9 with slide mount opening assembly 88 partially removed.

As shown in Figure 9A, with upper edge 74 of cover 12 and lower edge 98 of base 83 separated, film transparency 106 is able to pass through insertion opening 84 and into film nest 76. Inner edges 40A and 40B of spacer 14 serve to guide film transparency 106 into film nest 76. Film transparency 106 is fully inserted into film nest 76 when leading edge 108 of film transparency 106 lies within rear space 110 of film nest 76.

Figure 9B is a sectional view of cardboard slide mount 10 of Figure 9A taken along line 9B-9B. As shown in Figure 9B, leading edge 108 of film transparency 106 is guided into rear space 110 of film nest 76 by virtue of curved surfaces 56 of inner edges 20 of cover 12 and bottom 16. Curved surfaces 56 assure that leading edge 108 of film transparency 106 does not bind upon entry into rear space 110 of film nest 76. Once film transparency 106 is properly seated within film nest 76, pressure sufficient to activate adhesive regions 64A and 64B is applied film mount 10 to secure cover 12 to base 83, as described earlier with respect to Figure 7, and trailing edge 112 of film transparency 106 to adhesive regions 64A, as shown in Figure 10.

Figure 11 is an exploded view of a second embodiment of cardboard slide mount 120. As shown in Figure 11, cardboard slide mount 120 includes bottom 122, cover 124 and spacer 126. Bottom 122 and cover 124 are cut from a single sheet of cardboard in a direction and manner similar to that described relative to Figure 2. Bottom 122 and cover 124 generally correspond to bottom 16 and cover 12 of the embodiment shown in Figure 2. Spacer 126 is preferably cut from paper having a thickness of about 0.008 millimeters.

Spacer 126 generally corresponds to spacer 14 shown in Figure 2. Figure 12 is a top view of cardboard slide mount 120 with spacer 126 adhered to inner surface 128 of bottom 122 so as to create base 129 and film nest 130. Film nest 130 is similar to film nest 76 shown in Figure 5. Spacer 126 is dimensioned so that outer edge 132 of spacer 126 does not extend beyond outer edge 134 of bottom 122 and cover 124 when cardboard slide mount 120 is fully assembled.

Inner surface 135 of base 129 and inner surface 136 of cover 124 include U-shaped adhesive regions 138A and 138B similar to that shown in Figure 5. Like adhesive regions 62D and 62A of the first embodiment, adhesive regions 138A and 138B are formed from a heat activated adhesive which is capable of partially securing cover 124 to base 129. Cardboard slide mount 120 also includes adhesive regions 140A, 140B which, like adhesive regions 64A, 64B of the first embodiment, are capable of sealing together opposing ends of base 129 and cover 124, and of securing an edge of a film transparency within film nest 130. Thus, the second embodiment is capable of being assembled in a manner similar to that described with respect to Figures 8A-10, albeit at a lesser cost.This is so because the paper used to manufacture spacer 126 is less expensive than the SBS-MD bleach stock cardboard used to form bottom 122 and cover 124. In addition, spacer 126 produces a film nest having a depth of about 0.008 millimeters, which closely approximates the thickness of a film transparency, which is about 0.006 millimeters. Cardboard slide mount 120 therefore has a finished thickness of about 0.043 millimeters, which is less than that of cardboard slide mount 10.

Figure 13 is a partially assembled view of an alternative embodiment of cardboard slide mount 120 of Figure 12 showing adhesive regions 142A-142C. Adhesive regions 142A and 142B are applied to opposing ends of cardboard slide mount 120 so that when cover 124 is folded atop base 129, adhesive strip 144 lines up with adhesive strip 146. The adhesive forming regions 142A-142C is preferably a co-adhesive which is slightly tacky when dry.

This allows adhesive strips 144 and 146 to bond together when cover 124 is folded atop base 129. In addition, adhesive region 142C, like adhesive region 64A of cardboard slide mount 10, secures one side of a film transparency within film nest 130 when adhesive strip 144 is connected to adhesive strip 146. In a preferred embodiment, adhesive strip 144 is spaced approximately 1/16 inch from edge 150 of cover 124, and adhesive strip 146 is spaced approximately 1/16 inch from edge 152 of base 129. This spacing ensures that an opening assembly, similar to opening assembly 88 shown in Figures 8A-8C, will be able to separate edges 150 and 152 in the event adhesive strips 144 and 146 become partially connected. In one preferred embodiment, adhesive strips 144 and 146 are approximately 1/8 inch wide.

Figure 14 is a top view of another alternative embodiment of cardboard slide mount 120. As shown in Figure 14, edge 150 of cover 124 is slightly recessed from edge 152 of base 129. By recessing edge 150, corner 154 of base 129 is able to pass into a slide mount opening assembly a greater distance before a wedge, similar to wedge 92 of Figures 8A-8C, engages corner 156 of cover 124. By further delaying contact of wedge 92 with corner 156 of cover 124, corner 154 of base 129 is deflected downward along beveled edge 94 of base 90 a greater distance, which decrease the opportunity for cardboard slide mount 120 to become jammed as wedge 92 engages corner 156 of cover 124. In addition, cover 124 includes second chamfered corner 158, which permits cardboard slide mount 120 to be opened by a different direction of travel through an opening assembly.

Figure 15 is a third embodiment of cardboard slide mount 170 of the present invention. Cardboard slide mount 170 includes base 172 and cover 174. Base 172 and cover 174, like bottom 122 and cover 124 of Figure 11, are formed from a single sheet of cardboard, with outer edge 176 and inner edge 178 formed in the same direction and manner as cardboard slide mount 10 of Figure 2. In this embodiment, however, inner surface 180 of base 172 and cover 174 is embossed to create depression 182 in base 172 and depression 184 in cover 184. Depression 184 is formed as a mirror image of depression 182.

Depressions 182 and 184 are generally patterned after opening 42 of spacer 14, as shown in Figure 2. Thus, when cover 174 is folded atop base 172, depressions 182 and 184 are designed to create film nest 186. By forming film nest 186 out of depressions 182 and 184, the cost of manufacturing cardboard slide mount 170 is further reduced since spacer 126 as shown in Figure 11, and spacer 14 as shown in Figure 2, can be eliminated. In addition, by eliminating spacer 126 and/or spacer 14, cardboard slide mount 170 has a thickness of about 0.032 millimeters, which is considerably thinner than cardboard slide mount 120 or cardboard slide mount 10. In the preferred embodiment, depressions 182 and 184 are approximately 0.004 millimeters below inner surface 180 to ensure that film nest 186 forms a cavity sufficient to contain a film transparency.

Cardboard slide mount 170 can be assembled by using adhesives in any of the manner heretofore described.

The preclosed cardboard slide mount of the present invention is significantly less expensive than plastic, side-opening slide mounts typically used in the industry. The preclosed cardboard slide mount of the present invention, however, offers the desirable benefit of allowing a film transparency to be loaded into the slide mount through a side entrance, which is known to be a quicker and more efficient manner of preparing a slide mount. The side opening of the slide mount of the present invention is made possible by chamfering at least one corner of the cover of the slide mount to permit an opening assembly to quickly and effectively separate the edges of opposing sides of the slide mount without damage to the slide mount. The inner edges of the opposing sides of the slide mount can then be bonded together by using a suitable adhesive. Because an edge of the film nest includes an adhesive strip, a film transparency is secured along one edge within the film nest which holds the position of the film transparency within the slide mount, yet allows the film to expand and contract in response to extreme temperatures experienced by the slide mount within slide projectors. In addition to the adhesives disclosed, any other suitable adhesives, such as a moisture activated adhesive, could perform the bonding functions described herein.

Although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention.

Claims (41)

WHAT IS CLAIMED IS:

1. A slide mount comprising: a base having a first film window; a cover having a second film window aligned with the first film window, the cover being bonded to the base to define a film nest between the base and the cover and to define an insertion opening along a first side through which a film transparency can be inserted into the film nest; and a first adhesive layer positioned in the film nest adjacent one of the windows for holding the film transparency along one edge of the film transparency when the film is positioned in the film nest.

2. The slide mount of claim 1 wherein the first adhesive layer includes a micro-encapsulated, pressure-activated adhesive.

3. The slide mount of claim 1 and further comprising: a second adhesive layer adjacent the insertion opening for bonding the base and cover to close the insertion opening after the film transparency has been inserted into the film nest.

4. The slide mount of claim 3 wherein the first adhesive layer includes a micro-encapsulated, pressure-activated adhesive.

5. The slide mount of claim 1 wherein the base and the cover are cardboard.

6. The slide mount of claim 5 wherein the base includes a bottom layer of cardboard and a spacer layer of cardboard.

7. The slide mount of claim 6 wherein the base is connected to the cover along a first fold line.

8. The slide mount of claim 7 wherein the base is connected to the spacer along a second fold line.

9. The slide mount of claim 8 wherein the first fold line is positioned along the first edge of the base, and wherein the second fold line is positioned along a second, opposite edge of the base.

10. The slide mount of claim 6 wherein the spacer layer overlies and is bonded to the bottom layer.

11. The slide mount of claim 10 wherein the cover overlies and is bonded to the spacer layer.

12. The slide mount of claim 6 wherein the spacer layer includes an aperture which is larger than the first and second windows and which defines boundaries of the film nest.

13. The slide mount of claim 1 wherein the cover includes a chamfered outer edge adjacent the insertion opening.

14. The slide mount of claim 1 wherein the base and cover are bonded adhesively to one another along second, third and fourth sides.

15. The slide mount of claim 1 wherein the base includes a first embossed recess region surrounding the first film window, and the cover includes a second embossed recess region surrounding the second film window, and wherein the first and second embossed recess regions face one another to form the film nest.

16. A slide mount comprising: a base having a first film window; a cover having a second film window aligned with the first film window, the cover being bonded to the base to define a film nest between the base and the cover and to define an insertion opening along one side through which a film transparency can be inserted into the film nest; and an adhesive layer adjacent the insertion opening for bonding the base and cover to close the insertion opening after the film transparency has been inserted into the film nest.

17. The slide mount of claim 16 wherein the adhesive layer includes a micro-encapsulated, pressure-activated adhesive.

18. The slide mount of claim 16 wherein the base and the cover are cardboard.

19. The slide mount of claim 18 wherein the base includes a bottom layer of cardboard and a spacer layer of cardboard.

20. The slide mount of claim 19 wherein the base is connected to the cover along a first fold line.

21. The slide mount of claim 20 wherein the base is connected to the spacer along a second fold line.

22. The slide mount of claim 21 wherein the first fold line is positioned along the first edge of the base, and wherein the second fold line is positioned along a second, opposite edge of the base.

23. The slide mount of claim 19 wherein the spacer layer overlies and is bonded to the bottom layer.

24. The slide mount of claim 23 wherein the cover overlies and is bonded to the spacer layer.

25. The slide mount of claim 19 wherein the spacer layer includes an aperture which is larger than the first and second windows and which defines boundaries of the film nest.

26. The slide mount of claim 16 wherein the cover includes a chamfered outer edge adjacent the insertion opening.

27. The slide mount of claim 16 wherein the base and cover are bonded adhesively to one another along second, third and fourth sides.

28. The slide mount of claim 16 wherein the base includes a first embossed recess region surrounding the first film window, and the cover includes a second embossed recess region surrounding the second film window, and wherein the first and second embossed recess regions face one another to form the film nest.

29. A slide mount for holding a film transparency, the slide mount comprising first, second and third frame portions formed from a unitary piece of cardboard and having a common first surface and a common second surface, the first and second frame portions having borders and rectangular film windows, the third frame portion having a border and a rectangular opening larger than the rectangular film windows of the first and second frame portions, the rectangular opening configured to define a film nest when the first surface of the second and third frame portions are connected about the border, the first surface of the first frame portion configured to be connected about the border to the second surface of the third frame portion so as to define an end slit therebetween for insertion of the film transparency and so as to define a pocket between the first and second frame portions and in communication with the end slit, for holding the film transparency in alignment with the rectangular film windows.

30. A cardboard slide mount comprising: opposing first and second frame sections, each frame section having an outer edge, an inner surface and a rectangular window defined by an inner edge, the outer edge of the first frame section having radiused corners, the outer edge of the second frame section having at least one chamfered corner, the inner surfaces of the first and second frame sections being connected adjacent to three of the outer edges and further being unconnected adjacent to a fourth outer edge so as to define an opening between the first and second frame sections, the chamfered corner of the second frame section being adjacent to the fourth outer edge; and a cavity between the first and second frame sections, the cavity surrounding the rectangular windows of the first and second frame sections and communicating with the opening along the fourth outer edge, wherein the chamfered corner of the second frame section permits an opening mandrel to separate the first frame section from the second frame section along the fourth outer edge to expose the opening and thereby permit insertion of a film transparency into the cavity.

31. A partially preclosed slide mount for receiving and containing a film transparency, the cardboard slide mount comprising opposing first and second rectangular cardboard frames secured together in a face-to-face relationship along three sides so as to define an insertion opening along a fourth side and a pocket between the first and second rectangular cardboard frames, the first and second rectangular cardboard frames also including a rectangular aperture, the first rectangular cardboard frame having radiused outer corners and the second rectangular cardboard frame having at least one chamfered outer corner adjacent to the fourth side, wherein the chamfered outer corner of the second frame exposes the radiused outer corner of the first frame so as to allow an opening mandrel to contact the first frame and thereafter separate the first frame from the second frame along the fourth side to expose the insertion opening and allow the film transparency to be inserted into the pocket.

32. The slide mount of claim 31 wherein the fourth side of the first cardboard frame includes an adhesive for sealing the sealable opening after the film transparency is inserted into the pocket.

33. The slide mount of claim 32 wherein the adhesive is a microencapsulated, pressure-activated adhesive.

34. The slide mount of claim 32 wherein the adhesive is a coadhesive.

35. The slide mount of claim 31 wherein the pocket includes an adhesive strip along one edge of the rectangular window, the adhesive strip capable of securing one edge of the film transparency within the pocket.

36. The slide mount of claim 33 wherein the adhesive is a microencapsulated, pressure activated adhesive.

37. The slide mount of claim 33 wherein the adhesive is a cob adhesive.

38. A cardboard slide mount comprising: opposing first and second frame sections, each frame section having an outer edge, an inner surface and a rectangular window defined by an inner edge, the inner surfaces of the first and second frame sections being connected adjacent to at least two of the outer edges and further being unconnected adjacent to at least one outer edge so as to define an opening between the first and second frame sections; and a cavity between the first and second frame sections, the cavity surrounding the rectangular windows of the first and second frame sections and communicating with the opening, wherein the first and second frame sections are capable of being at least partially separated to expose the opening and thereby permit insertion of a film transparency into the cavity.

39. A slide mount substantially as herein described and as described with reference to Figures 1 to 10 of the accompanying drawings.

40. A slide mount as herein described with reference to Figures 11 to 13 of the accompanying drawings.

41. A slide mount as herein described with reference to Figure 14 or Figure 15 of the accompanying drawings.