US2002035A - Pack of photographic plates - Google Patents

Description

May 21, 1935. B. LIEBESKIND PACK OF PHOTOGRAPHIC PLATES Filed March 19, 1951 4 Sheets-Sheet 1 B. LIEBESKIND PACK OF PHOTOGRAPHIC PLATES May 21, 1935.

Filed March 19, 1931 4 Sheets-Sheet 2 4 Sheets-Sheet 3 B. LlEBESKlND PACK OF PHOTOGRAPHIC PLATES Filed March 19,

' May 21, 1935.

rl/II/lllllIl/IIIIII /Il/I/II/I/I/IIIII 1111111111111! May 21, 1935.

B. LIEBESKIND PACK OF PHOTOGRAPHIC PLATES 4'Sheets-Sheet 4 Filed March 19, 1931 Patented May 21, 1935 PATENT OFFICE PACK OF PHOTOGRAPHIC PLATES -Bernhard Liebeskind, Berlin-Zehlendorf, Germany, assignor to Agfa Ansco Corporation, Binghamton, N. Y., a corporation of New York Application March 19, 1931, Serial No. 523,857 In Germany AprilZ, 1930 My present invention relates to a new packing for photographic plates and more particularly to a packing in which two plates are comb-inedwith their emulsion layers facing each other, so as to form an independent unit.

In my prior specification Ser. No. 431,558, filed February 26, 1930 (U. S. Patent No. 1,820,146), I disclosed a pack consisting of a pile of photographic plates, wherein the plates arranged in pairs with their emulsion layers facing each other, are separated by means of a fold of a-paper strip wrapping the pile of plates on four sides.

Now I have improved this method of packing by combining a pair of photographic plates with their emulsion layers'facing each other, so as to form an independent unit by wrapping each pair of plates at four sides singly by means of a paper strip and by separating the plates at least at one edge by interposing a short fold of the said wrapping paper. The term unit as used in the description following hereafter, is'intended to mean such an arrangement of two plates having their emulsion layers facing eachother, but separated by a fold of paper. I

This new method of packing photographic plates in units makes it possible to take out single plates from an assembled pile of plates in a particularly easy manner without damaging the lightetight envelope of the remaining plates. Moreover, the packing is particularly suitable for exportation to tropical countries, a stickingto gether of the plates at their emulsion layers under the influence of damp heat being in;- possible. r

A further object of the invention is the particular form of the material in which the plates are wrapped in pairs. V

The inventionjconsists in the methodherein described and in the novel features, arrangement, construction and combination of parts of the packing and means hereinafter described with reference to certain preferred embodiments thereof. f

Further objects of my invention will more fully appear from the following description taken in connection with the accompanying drawings which illustratethe preferred embodiments of the invention, the samereference characters being used throughout the different figures to indicate the same or corresponding parts.

Referring to the drawings illustrating by way of example the preferred methods of packing photographic plates: Q

Fig. 1 represents a unit of two plates'inan opened condition.

10 Claims. (01. 206- -62) Fig.2 represents a unit closed byan adhesive paper strip.

Fig. 3 is a pile formed by six units of plates placed on a wrapping paper which is intended to cover the pile at its upper, and longitudinal sides.

Figs. 4 to 6 illustrate a somewhat modified form ,of packing the pile of units.

Fig. 7 shows another method of formingth'e unit,'wherein the uncovered longitudinal sides are embraced by U-shaped strips of sheet metal.

Fig. 8 shows a photographic plate laid on a wrapper of a somewhat modified form,

Fig. 9 represents the unit of two plates covered by the wrapper illustrated in Fig. 8 and placed on a second protective paper strip.

Fig. 10 shows the finished unit inserted into an envelope.

Figs. 11 to 13 and Figs. 14 to 16 illustrate further methods of packing the units consisting of pairs of plates. 7

Referring to the drawings in detail (Figs. 1 to 7) I is a strip of paper which is impermeable to light, for instance, black paper, and which has the breadth of thenarrow side of the plates and is about 2 cm. longer than double the length of a plate.=In its middle part it is provided withthe fold 3, which may be fixed by pasting together its inner surfaces with an adhesive substance that has no injurious eifectupon the light sensitive layer. Two photographic-plates are placed on this paper strip, the emulsionside 4 turned upward and the narrow sides of the plates touching the fold 3. The plates now can be put one upon the other with their emulsion layers facing each other and both ends of the paper strip can be folded over the two plates thus forming a unit. In this way (not shown in the drawings) the light sensitive layers are separatedat one of the narrow sides of the plates by the fold 3, so that they can touch each other onlyat the opposite narrow side. In the embodiment of my invention illustrated by Figs. 1 to 7, however, each single plate is covered at the narrow side opposite to the fold 3 by a short flap 6 of the paper strip. In this case, when assembling the two plates in a unit (Fig.2) the two flaps 5 come into contact and the sensitized layers 4 of the plates 5 are separated from each other by a double paper layer (3 and 6) at the narrow sides of the plates.

'In order to prevent the paper strip of a unit containing two plates from unfolding, whereby the lates might be displaced, it is held together, as illustrated in Fig. 2, at the side opposite the fold '3, that is at the side where the unit can be opened, by the adhesive strip I attached to its outer surfaces. This adhesive strip I can easily be removed by slitting it in the space 8 between the two ends 6 of the enveloping paper folded over the plates. The gummed adhesive strip is well suited for the application of notes, such as, for instance, emulsion, control numbers, instructions for'use and so on.

' Fig. 3 represents a pile consisting of six units 9, embraced by a paper strip It]. The breadth of the paper strip It is equal to the length of the plates. It envelops the pile atthe lower and upper side and at the longitudinal edges II not yet covered.

A preferred method of packing a pile of units is illustrated in Figs. 4 to 6. Inthis case I choose the strip II} embracing the longitudinal sides of the pile of several units of plates somewhat broader than the length of the units and I fill up the space formed by the projecting extremities Illa on both front sides of the pile with a piece of cardboard II. The pile is embraced, with its front sides protected by-the pieces of cardboard I], by the strip I0 and is inserted into a platebox I8. Preferably, a threefold up-turn casing is 'used for this purpose, as the pile of plates is thus completely protected against the action of light while the platesremain easily accessible.

. If the pack of plates shall consist of a single pair of plates, the unit illustrated in Figs. 1 and 2 'is preferably closed at its uncovered longitudinal edges II by an U-shaped strip I2 of sheet metal (Fig. '7) f This strip of sheet metal can be folded at the edges I3 in the way a package is wrapped up, thus providing to a certain degree a lighttight closure on the corners and protecting the corners from being damaged by shock. The

strips I2 of sheet metalresiliently press on the "upper and lower side of the unit as they are provided with bosses I4. A unit formed in this manner and secured against pressure and shock, oanbe packed like a letter within a light-tight envelope.

This method of packing photographic plates can'befurther improved bya slight modification of the paper strip I and by wrapping the unit formed in a second paper strip, forinstance, a red one,

.in such a manner as to cover the edges of the plates left free by the first strip. In this way, the strips I2 of sheet metal can be better fitted over the longitudinal edges of the plates. Moreover, this second paper strip protects the longitudinal edges against light, which formerly were only protected by the U-shaped strips of metal.

This modification of my invention is represented in Figs. 8 to 10. In this case the paper strip l which is impermeable to light, has the breadth of the narrow side of theplates and is about 3 cm. longer than double, the length of a' plate thus providing at one end a sufficiently long flap I a. The other end 2 of the strip I is creased in the shape of aV. In the'middle the strip I is provided with the fold 3 whose inner surfaces may be pasted together with an ad- :hesive' substance that has no injurious effect upon the light sensitive-layer. Two plates 5 are placed on this paper strip in the manner described above. The platescan now be put one upon the other with their emulsion layers adjacent to each other and the projecting flap Id of the paper strip I can be folded over the edge of the pack opposite the fold. In this way the light-sensitive layers are separated at one of the narrow sides of the'plates by the fold 3and at the other narrow side by the springy end 2 of the strip l, This kind of the drawings.

of folding permits one to dispense with the adhesive paper strip I.

In order to sufficiently protect against light the longitudinal sides of the plates left free by the paper strip I, a protective strip Ifib, preferably of red ceresin paper, is wrapped round the longitudinal edges of the unit before fitting over them the caps I2 of sheet metal. The fitting of these caps is greatly facilitated thereby, because no hindering paper edges protrude. After the fitting of the two caps I2 the overlapping part of the red protective paper strip IIlb is torn off. This can very cleanly and easily be done, the sharp" being ready for exportation.

Figs. 11, 12 and 13 illustrate a further method to embrace a unit of two plates by a longitudinal strip in a somewhat simpler and more handy manner. In this case, a fold 3 in the middle part of the paper strip I is dispensed with and a separate short paper strip 3a creased to form a fold as seen in Fig. 12 is used, which is embraced by the strip I when packing the unit of plates fixed in the grooves of the strip 3a. Thus, the layer sides of the plates of a unit (Fig. 11 represents only one plate) are separated at the one side by the fold 3b of the separately interposed paper strip 3a and at the opposite side by a V-shaped fold 2 at one extremity of the longitudinal strip I (Fig. 13). When the unit of plates is closed, the other extremity Ia of the longitudinal strip I is loosely folded over the other narrow side of the unit,

thus forming a suitable means for easily taking facture of the paper strip enveloping the unit, is

considerably simplified and rendered less costly, since this strip can be made of one piece. In this case it is not necessary to roll or fold the ends.

As seen from Fig. 14, the paper strip, impermeable to light, consists of four parts, the middle part I, the lid part lb, the fiapped end Ia and the frame I6. The plate 5 is placed on the middle part I with its layer side 4 turned upward, whereafter the frame I6 is folded over (Fig. 15). Then the second plate is placed on the frame with its .layer side adjacent to it and the lid part II) with a flap la is folded over the unit of plates (Fig. 16). The plates thus enveloped are embraced at the uncovered longitudinal sides by caps I2 of sheet metal and can either be inserted in pairseach performing a unit.into an envelope or several units may be combined to form a dozen-packing. The window of the frame preferably has rounded corners in order to prevent them from tearing. Theframe may be employed as a mask or vignette in the printing process.

It is obvious that my invention is not limited by the details given in the foregoing description Thus, the units or a pile of units may be wrapped, for instance, in a waxed or parafiined paper which may be cemented at its ends by warming and pressing.

Various modifications and changes and arrangement of parts are considered to be within the spirit of the invention and the scope of the following claims:

What I claim is:- p

l. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at least at one narrow side by a part of said wrapping paper strip, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

2. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

3. A pack comprising a pile of pairs of photographic plates, each pair being separatelywrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at least at one narrow side by a fold in said wrapping pa per strip, which fold has been stuck together, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

4. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip, means for separating the emulsion layers of each pair of plates at the opposite side, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates. I a

5. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip, and at one end of said paper strip a flap separating the emulsion layers of the pair of plates at the opposite side, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

6. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip, and at both ends of said paper strip flaps separating the emulsion layers of the pair of plates at the opposite side, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

7. A pack comprising a. pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip, and at one end of said paper strip a V-shaped creased flap separating the emulsion layers of the pair of plates at the opposite side, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

8. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at one side by a fold in said wrapping paper strip and a fold of a separate paper strip separating the emulsion layers'of the pair at the opposite side, said pile being. wrapped in a. paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates.

9. A pack comprising a pile of pairs of photographic plates, each pair being separately Wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at 7 all four sides by an interposed, frame-like extension at one end of said paper strip, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs .of plates.

10. A pack comprising a pile of pairs of photographic plates, each pair being separately wrapped in a paper strip covering the pair of plates on four sides, the emulsion layers of each pair of plates facing each other and being separated at least at one narrow side by a part of said wrapping paper strip, said pile being wrapped in a paper strip closely embracing it at the upper and lower sides and at the two sides not covered by the separate wrappings of the pairs of plates, the paper strip which wraps the pile extending somewhat over the two sides of the pile not covered by said paper strip, the hollow spaces thereby formed each being filled with a piece of cardboard which covers one of said uncovered sides of the pile.

BERNHARD LIEBESKIND.

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