GB2092329A - Photographic slide mounts - Google Patents

Abstract

A slide mount (1) for a photographic transparency comprises a main rectangular frame (3), and a retaining frame (2). The frames 2 and 3 each have a row of projections 7 and 8A which pass through the sprocket holes in the transparency and enter corresponding recesses 7a and 8. This results in the transparency being held under slight tension and prevents it buckling in alternative embodiments all the projections are formed on either frame 2 or frame 3. The frames 2 and 3 can have a co-operating sharp edge end groove which sever the transparency from a continuous strip when the frames 2, 3 are brought together. <IMAGE>

Description

SPECIFICATION Photographic slide mounts This invention relates to mounts for photographic slides intended principally for use by professional photographers and audio-visual personnel.

Current photographic slide mounts suffer from certain deficiencies. One known slide mountcom- prises a pair of hinged substantially rectangular frames each face having a glass pane through which a mounted slide may be viewed when the frames are hinged closed. Such an arrangement requires cleaning of six surfaces, namely front and rear surfaces of both panes of glass, together with both slide surfaces. There are also known slide mounts which do not incorporate glass panes but merely provide openings through which a mounted slide can be viewed. However, these latter known mounts do not provide for precise location of a mounted slide.

Further, there is no known slide mount which is without glass windows and which is adapted to ensure precise location of the slide when mounted.

It is an object of this invention to provide a slide mount without glass panes which is adapted to ensure precise location of a mounted slide.

It is a further object of this invention in a preferred form to provide a slide mount which permits mechanical ratherthan manual mounting of slides.

This invention provides, in one broad form, a photographic slide mount comprising two hinged frames, each frame having a substantially rectangular opening therein, on the first said frame a plurality of projections adjacent the hinge and a plurality of recesses adjacent on the opposite side of the opening in said first frame from said projections, on the second frame a plurality of recessess adjacent said hinge and a plurality of projections on the opposite side of the opening in said second frame from said recesses, the projections and recesses of said first frame being adapted, when said frames are closed together, to mate with, respectively, the recesses and projections of said second frame in such a manner that the projections of both frames are inserted through apertures of a slide mounted in said frame to hold said slide rigidly in said frame, the frame projections being located a sufficient distance apart when a said slide is mounted to slightly stretch said slide.

In the alternative, a slide mount according to this invention may be provided with two rows of projections on one of the hinged frames and two corresponding rows of projection receiving apertures on the other frame.

It will be appreciated that a slightly stretched slide mounted in such a mount as is defined above will be not only immovably fixed in said mount but also located so as to prevent buckling or other movement deleterious to the viewing of such slide when projector located.

In an alternate form the slide mount according to this invention is further provided with a guillotine or like cutting means substantially at right angles to the line of the hinge between the frames so that when a slide is fed into a mount according to this invention and the frames closed, the slide is cut off from the line of film of which it formed the leading end. It will be appreciated that such an arrangement lends itself to mechanincal rather than manual slide mounting.

Such a guillotine may be provided by a blade or sharp edge on one frame and a corresponding groove cut in the opposed frame.

By way of example only a preferred embodiment of a slide mount according to this invention will now be described with reference to the accompanying drawing wherein: Figure 1 is a perspective view of a slide mount according to this invention with its frames in the open position; Figure2 is a section taken on the line Il-Il of Figure 1 showing catch 14 engaged in hole 15, thus locking frame 2 into frame 3.

Figure 3 is a sectional view depicting closure of the mount adjacent its hinge with a slide in location; Figure 4 is a perspective view of a slide mount according to an alternate form of this invention with its frames in the open position; Figure 5 is a section taken on the V-V of Figure 4 showing a guillotine groove; Figure 6 is a section depicting the outer edge of the first frame of the embodiment shown in Figure 4, locating in the second frame on closure of the mount hinge.

Depicted generally at 1 is a preferred embodiment of a slide mount according to this invention. Slide mount 1 incorporates frames 2 and 3 hinged at 4.

Frame 2 has an open face 5 and frame 3 has a corresponding open face 6. Frame 2 is provided with a row of projections 7 and a row of apertures 8.

Frame 3 is provided with a row of apertures 7A corresponding to projections 7 on frame 2. Frame 3 is also provided with a row of projections 8A corresponding to appertures 8 on frame 2.

As indicated above it is a feature of this invention in a preferred embodiment that projections 7 and 8A are so arranged that when they feed into apertures in film of the slide in question the slide is stretched slightly so as to be rigidly retained in a fixed position. Figure 3 depicts a portion of slide 11 having film aperture 12 being located in mount 1 by way of projection 7 engaging aperture 12 and stretching film 11 as hinge 4 is closed until projection 7 is located in place inside aperture 7A. This locating is effected as depicted in Figure 2 by reason of catches 14 of frame 2 being inserted into holes 15 of frame 3, and edge of catch 14 engaging on lip 16, thus locking frame 2 to frame 3.

Figure 4 shows an alternative embodiment of the present invention in which a guillotine groove 9 is provided in frame 3 and a corresponding knife 10 is provided in frame 2 so that when frames 2 and 3 are hinged closed a slide mounted on projections 7 and 8A is automatically cut from a roll of film of which the slide in question was the leading portion. This contemplate that such film is fed into slide mount 1 from the right-hand side of the mount as depicted in Figure 1. Provision of guillotine arrangement on the left-hand side of slide mount 1 as a alternative to the right-hand side is also feasible if it is desired to feed film from the left rather than the right-hand side of the mount.

The alternative embodiment of Figure 4 also includes an alternative locating arrangement as shown in detail in Figure 6, in which edge 17 of frame 2 can beforceablyfitted into recess 18 of frame 3. Of course this alternative fitting means is not restricted to the embodiment shown in Figure 4 but could be used in the preferred embodiment shown in Figure 1.

Claims (9)

1. A photographic slide mount comprising: two hinged frames, each frame having a substantially rectangular opening therein, one of said frames have a first plurality of projections adjacent the hinge and the other of said frames having a first plurality of recesses adjacent said hinge, either one of said frames having a second plurality of projections on the opposite side of said opening from said hinge and the other one of said frames having a second plurality of recesses in the opposite side of said opening from said hinge and said first and second pluralities of projections and said first and second pluralities of recesses adapted to co-operate, when said frames are closed together, so as to mate respectively in such a manner that said first and second pluralities of projections are inserted through apertures of a slide being mounted in said frame to hold said slide rigidly and in a slightly stretched manner.

2. A mount as defined in claim 1 wherein one of said frames contains said first plurality of projections and second plurality of recessess and the other one of said frames contains said first plurality of recesses and said second plurality of projections.

3. A mount as defined in claim 1 or 2 further comprising at least one securing means to releasably secure said frames in a closed position.

4. A mount as defined in claim 3 wherein said securing means comprises: a securing aperture located in one of said frames in the opposite side of said opening from said hinge; a projected catch in the other one of said frames and positioned correspondingly; and said catch and said securingaperture adapted to co-operate, when said frames are hinged together, so that upon closing together said frames a portion of said catch will releasably engage a corresponding portion of said securing aperture.

5. A mount as defined in claim 4 wherein said portion of said securing aperture and said catch are substantially L-shaped lips, said lips being relatively inverted when said mount is closed.

6. A mount as defined in any one of the preceding claims produced in a plastics materiai.

7. A mount as defined in any one of the proceding claims further comprising: a guillotine blade on one of said frames, said blade being substantially at right angles to said hinge and at one side of said aperture; and a guillotine recess positioned correspondingly on the other one of said frames and being co-operative with said blade so as to cut a slide being mounted in said mount as said frames are closed together.

8. A slide mount for a photographic transparency of a predetermind type have respective rows of sprocket holes along opposite edge regions thereof, the mount comprising a substantially rectangular frame defining an opening through which such a transparency can be viewed, first and second retainer portions adapted to be fastened to the frame along first and second opposite side portions respectively thereof, with one of the said opposite edge regions of such a transparency held between the first retainer portion and the said first side portion of the frame and with other of the said opposite edge regions of the transparency held between the second retainer portion and the said second side portion of the frame wherein one of the two first portions (the said first retainer portion and the first side portion of the frame) is formed with a row of projections arranged to pass through respective sprocket holes in the said one edge region of the transparency, when the mount is in use, so that each projection is received in a recess that is formed in the other of the said two first portions; ; and one of the two second portions (the said second retainer portion and the said second side portion of the frame) is formed with a row of projections arranged to pass through respective sprocket holes in the said opposite edge region of the transparency so that each projection is received in a recess that is formed in the other of the said two second portions; and wherein the said projections and recesses are so formed and positioned that, when the mount is in use, the transparency is held under slight tension, across the said opening, between two rows of projections.

9. A photographic slide mount substantially as described in reference to, and as illustrated by, Figures 1 to 3 or Figures 4 to 6 of the drawings.