US2112816A - Film package - Google Patents

Description

March 29, 1938. J. K. RULON 2,112,816

FILM PACKAGE Filed Aug. 18, 1937 23 I INVENTOR .lnseph Keen Ruluri.

ATTORN EY Patented Mar. 29, 1938 UNITED STATES PATENT OFFICE Pont Film Manufacturing Corporation,

Inc.,

New York, N. Y., a corporation of Delaware Application August 18, 1937, Serial No. 159,802

5 Claims.

This invention relates to packaging and more particularly to an improved package for dental X-ray film. A principal object of this invention is to provide a simplified lightproof dental X-ray package that will permit the rapid removal of the exposed film therefrom without harming the delicate sensitized surfaces of the film. An object of equal importance is to provide such a package that may be rapidly and economically assembled and sealed by relatively simplified packaging machinery in mass production. A further object is to provide a method for the lightproof packaging of sensitized elements. Additional and more detailed objects will plainly appear from the specification and drawing presented herewith in exemplification but not in limitation of the present invention. Like reference characters represent like elements in the drawing which represents diagrammatically in:

Fig. 1, a perspective view of the assembled package;

Fig. 2, a vertical cross sectional view of the package shown in Fig. 1, taken on the line 22;

Fig. 3, a plan view of the envelope shown in Fig. 1 in an unfolded position;

Fig. 4, a plan view of the combined pull tab and lightproof wrapper 25 used in the package shown in Fig. 1;

Fig. 5 represents a plan view of a dental X-ray film; and

Fig. 6 represents a plan view of a lightproof and X-ray impervious backing member.

In assembling the package shown in Fig. 1 the film 22 may be positioned upon the central portion 36 of the wrapper and withdrawing strip 25. The fiap member 31 may then be folded over the film 22 and the backing member 23 may then be superposed upon the flap 31. The film thus wrapped is then placed upon the central portion of the envelope 24 so that the extended pull tab portion 35 is adjacent to the closure flap 39. The corner flaps 42 and the relatively narrow edge flaps 4| of the envelope ,24 may then be folded over the backing 23 which rests upon the fiap 31. The lower flap 40 of the envelope 24 is next folded over the wrapped film and the backing 23 so that it covers the two edge flaps 4| and the two lower corner flaps 42 and may be secured thereto by a non-foggingv adhesive. Next the tab member 35 may then be folded down over the fiap 40 and finally the closure flap 39 is folded over the portion of tab member 35 so that the tab 35 protrudes from under the flap 39 as shown in Fig. 1. The flap 39 is sealed at its corners to the flap 4!] by means of a non-fogging adhesive.

In opening the package shown in Fig. 1 the operator grasps the pull tab 35 and pulls it back so that the perforations 43 in the flap 39 act to sever the flap and by a continued pull the film 22 may be removed from the package still folded in the members 36 and 31 of the wrapper 25.

The pull tab member 35 shown in Fig. 4 is preferably provided with projecting shoulders 38 which afford an additional light seal in combination with the envelope flap members 4|, 42 and 39 shown in Fig. 3. The wrapping member 25 is preferably formed of lightproof paper and the envelope 24 is preferably formed of lightproof and waterproof paper Whose exterior surface may be pebbled. The backing member 23 is preferably formed of a thin sheet of material impervious to X-ray such as lead-foil or a paper containing a compound impervious to X-rays. While the flap 39 may be preferably provided with the perforations 43 the envelope 24 may also operate without these perforations. In this case the pull on the tab 35 acts to sever the flap 39 from its adhesive and causes the flap 39 to fold open as a unit permitting the continued pull to remove the film 22 enfolded in the wrapper 25. When the perforations are omitted a tacky adhesive instead of a quick-drying one is preferably employed to seal the flap 39.

While the foregoing specification and drawing set forth preferred exemplifications of the present invention it is intended to include all variations and modifications within the spirit and scope of the appended claims.

I claim:

1. The method of packaging dental X-ray film that includes the steps of enfolding said film in a combined wrapping and withdrawing strip consisting of a central portion on which the film is positioned, a flap member of similar area folded over said film, and an opposite withdrawing member provided with a pull tab; positioning a backing member impervious to X- rays over said folded flap member; folding said withdrawing member over said backing member and said folded fiap member; enclosing the film thus wrapped in an envelope provided with opposite marginal cover flaps, so that said withdrawing member will be folded over one of said cover flaps of said envelope and under the opposite cover flap of said envelope so that said pull tab will project from under said opposite cover 2. A photographic film pack comprising in combination a sensitized film, a combined wrapper and withdrawing strip consisting of a central portion on which the film is positioned, a portion of similar areafolded over said film, the central portion being extended to form a pull tab, said film and wrapper being enclosed and sealed in an envelope formed of sheet material cut and folded to afford edge flaps turned inwardly, a lower flap turned over and sealed to the edge flaps and an upper closure flap extending over the pull tab and being sealed to the lower flap, said pull tab being folded under said closure flap, and extending beyond the lower edge of the same.

3. A dental X-ray film pack comprising in combination a sensitized film, a combined wrapper and withdrawing strip -of lightproof paper consisting of a central portion on which the film is positioned, a portion of similar area folded over said film, the central portion being extended to form a pull tab, said film and wrapper being enclosed and sealed in an envelope formed of a single sheet of lightproof and waterproof paper out and folded to afford edge flaps turned inwardly, a lower flap turned over and sealed to the edge 'fiaps and an upper closure flap extending over the pull tab and being sealed to the lower flap, said pull tab being folded under said closure flap and extending beyond the lower edge of the same, and asheet of backing material impervious to X-rays interposed between the wrapper and envelope.

4. A dental X-ray film pack comprising in combination a sensitized film, a combined wrapper and withdrawing strip of lightproof paper consisting of a central portion on which the film is positioned, a portion of similar area folded over said film, the central portion being extended to form a pull tab, said film and wrapper being enclosed and sealed in an envelope formed of a single sheet of lightproof and waterproof paper out and folded to afford edge flaps turned inwardly, a lower fiap turned over and sealed to the edge fiaps and an upper closure fiap extending over the pull tab and being sealed to the lower fiap, said pull tab being folded under said closure flap and extending beyond the lower edge of the same, and a sheet of backing material impervious to X-rays interposed between the wrapper and envelope, said envelope being further provided with in-turned corner flaps of small area.

5. A dental X-ray film pack comprising in combination a sensitized film, a combined wrapper and. withdrawing strip of lightproof paper consisting of a central portion on which the film is positioned, aportion of similar area folded over said film,, the central portion being extended to form a pull tab, said film and wrapper being enclosed and sealed in an envelope formed of a single sheet of lightproof and waterproof paper out and fold- .7

flap, said pull tab being folded under said closure flap and extending beyond the lower edge of the same, and a sheet of lead foil interposed between said wrapper and envelope, said closure flap being provided with perforations positioned over the outline of the pull tab.

' JOSEPH KEEN RULON.

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