EP0000522B1 - Cartridge provided with a film-press plate for sheet-like film material, especially a radiographic film - Google Patents

Cartridge provided with a film-press plate for sheet-like film material, especially a radiographic film Download PDF

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Publication number
EP0000522B1
EP0000522B1 EP19780100400 EP78100400A EP0000522B1 EP 0000522 B1 EP0000522 B1 EP 0000522B1 EP 19780100400 EP19780100400 EP 19780100400 EP 78100400 A EP78100400 A EP 78100400A EP 0000522 B1 EP0000522 B1 EP 0000522B1
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EP
European Patent Office
Prior art keywords
cassette
film
pressure plate
bellcrank
film cassette
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19780100400
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German (de)
French (fr)
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EP0000522A1 (en
Inventor
George Frederick Albert Turner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ilford Imaging UK Ltd
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Ciba Geigy AG
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Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of EP0000522A1 publication Critical patent/EP0000522A1/en
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Publication of EP0000522B1 publication Critical patent/EP0000522B1/en
Expired legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
    • G03B42/04—Holders for X-ray films

Definitions

  • the invention relates to a cassette with a film pressure plate for sheet-shaped film material, in particular X-ray film, with a frame with a lower plate and an upper plate, between which there is the pressure plate, which resiliently rests against the lower plate when the cassette is closed and from which when the cassette is open lower plate is lifted off, with a slit-shaped opening at one end of the frame for the insertion or removal of a film, with at least one lifting projection along each longitudinal edge of the pressure plate, with two push rods arranged on the long sides of the frame and in their longitudinal direction between a first position , in which the cassette is closed, and a second position in which the cassette is open, are movable.
  • a film pressure plate for sheet-shaped film material in particular X-ray film
  • cassettes are used together with appropriately trained film loading and unloading devices and film processing devices for processing the film in daylight.
  • each push rod is assigned at least one round part which can be moved by it, which is arranged at a lifting attachment and, in the first position of the push rod, is located on one angle leg of an angled part, which angle leg below At least part of the lifting attachment is located, so that when the push rod is moved from the first to the second position, the round part is moved from the push rod on the angled part to its other angle leg, as a result of which an angle leg initially parallel to the pressure plate moves upwards is pivoted so that the lifting attachment and thus the pressure plate are lifted together with a light-shielding device which, when the cassette is closed, prevents light from penetrating through the opening into the cassette to open the cassette.
  • a preferred embodiment of the film cassette according to the invention is characterized in that the pressure plate has several lifting lugs on each side edge, each of which has a round part and an angled part. This results in a particularly even lifting of the pressure plate.
  • a cassette has a four-sided frame 1, in which a slot-shaped opening 2 is provided at one end.
  • a front and top plate 3 and a rear and bottom plate 4 complete the flat six-sided cassette.
  • the ends of two push rods 5 are also shown.
  • the push rod 5 are assigned two rollers 8. Each roller 8 sits on a lower angled part 9 (of which each end is designated by 9 in FIG. 2). There is an upper angled part 10 above each roll. This arrangement is shown in a perspective view in FIG. 3, broken down into individual parts.
  • Two upper angled parts 10 are connected to one another by a connecting or holding part 11.
  • a number of leaf or flat springs 12 are attached to each mounting part 11.
  • a light-shielding device 14 is provided which prevents light from entering the cassette when the cassette is closed.
  • FIG. 3 the position of the roller 8 between the upper and lower angled part 10 and 9 is shown.
  • the leaf spring 12 attached to the holding part 11 is shown so that it presses down on the pressure plate 6.
  • the roller 8 is shown next to a lifting lug 7 which is attached to the pressure plate 6.
  • the push rod 5 is shown withdrawn from its position in the cassette.
  • a roller is set by means of soft and can be brought into a corresponding position.
  • the roller 8 fits exactly between the lugs 13, and when the push rod 5 is moved, the roller is also moved together with the push rod.
  • FIG. 5 reference numerals 6 to 9 and 12 denote the same parts as in the previous figures.
  • a connecting piece 15 is attached to the lower angled part 9, which is abaeboaen. to form a leaf spring support member 16.
  • This mounting part is connected to a similar connector on the other side (not shown) of the cassette.
  • FIG. 6 shows two positions of the roller 8 with respect to the lower angled part 9.
  • Fig. 6.1 the cassette is closed.
  • the roller 8 sits on the long flat part of the angled part 9.
  • the leaf spring 12 presses against the pressure plate 6.
  • Fig. 6.2 the cassette is in the open position.
  • the roller 8 has been moved so that the longer part of the angled part 9 has been pivoted upwards, as a result of which the attachment 7 and the pressure plate 6 to which the attachment 7 is attached are raised.
  • the leaf spring 12 has been raised so that it no longer presses against the pressure plate 6.
  • the end position of the pressure plate 6 is thus shown in Fig. 6.2.
  • the front or upper and the rear or lower plates 3 and 4 are fixed, immovable plates; this means that they will not be moved or lifted while the cartridge is being removed or loaded. However, it is possible to remove both plates from the frame 1 in order to disassemble and disassemble the cassette.
  • the film cassette according to the invention is normally in the closed state, in which the pressure plate 6 is pressed against the rear or lower plate 4 by the leaf springs 7.
  • a film dispenser as described, for example, in British patent application 12 180/77 of March 23, 1977 or in GB - PS 1 361 014.
  • the end of the cassette is inserted into the output opening in a light-tight manner.
  • Two rods then press down on the push rods 5 so that the cassette is opened.
  • the film is then placed in the cassette.
  • the bars which press on the push rods 5 are then withdrawn and the cassette is thereby closed. It can then be removed from the dispenser.
  • a cassette is opened when it is inserted into the light-tight opening and the cassette is then closed again when it is removed from the opening.
  • the film in the cassette can then be exposed in the usual way. After the exposure, the cassette is then turned over so that the slot points downward.
  • the cassette is then placed in a film store or in a film processing device.
  • the opening into which it is inserted is also light-tight. Facilities then come with the push rods 5 engages, whereby the cassette is opened and the film falls into a receptacle of the storage or processing device due to gravity.
  • the cassette is closed when it is removed from this device.
  • Both the film output device and the film storage or processing device can be located in a film exposure room with daylight.

Description

Die Erfindung betrifft eine Kassette mit einer Filmandrückplatte für blattförmiges Filmmaterial, insbesondere Röntgenfilm, mit einem Rahmen mit einer unteren Platte und einer oberen Platte, zwischen denen sich die Andrückplatte befindet, die bei geschlossener Kassette federnd an der unteren Platte anliegt und bei offener Kassette von der unteren Platte abgehoben ist, mit einer schlitzförmigen Oeffnung an einem Ende des Rahmens zur Eingabe oder Entnahme eines Films, mit zumindest einem Anhebeansatz entlang jeder Längskante der Andrückplatte, mit zwei Schubstangen, die auf den Längsseiten des Rahmens angeordnet und in ihrer Längsrichtung zwischen einer ersten Stellung, bei der die Kassette geschlossen ist, und einer zweiten Stellung, bei der die Kassette geöffnet ist, bewegbar sind.The invention relates to a cassette with a film pressure plate for sheet-shaped film material, in particular X-ray film, with a frame with a lower plate and an upper plate, between which there is the pressure plate, which resiliently rests against the lower plate when the cassette is closed and from which when the cassette is open lower plate is lifted off, with a slit-shaped opening at one end of the frame for the insertion or removal of a film, with at least one lifting projection along each longitudinal edge of the pressure plate, with two push rods arranged on the long sides of the frame and in their longitudinal direction between a first position , in which the cassette is closed, and a second position in which the cassette is open, are movable.

Derartige Kassetten dienen zusammen mit entsprechend ausgebildeten Filmlade- und Filmentladevorrichtungen sowie Filmverarbeitungsvorrichtungen zur Verarbeitung des Films bei Tageslicht.Such cassettes are used together with appropriately trained film loading and unloading devices and film processing devices for processing the film in daylight.

Bei einer aus der GB-Patentschrift 1 361 014 bekannten Kassette dieser Art sind zum Abheben der Andrückplatte Rampenflächen auf den Schubstangen vorgesehen. Diese Konstruktion ist zwar sehr einfach, hat jedoch verschiedene Nachteile. Insbesondere ist infolge der Gleitreibung die zum Oeffnen der Kassette erforderliche Kraft relativ gross.In a cassette of this type known from GB Pat. No. 1,361,014, ramp surfaces are provided on the push rods for lifting the pressure plate. Although this construction is very simple, it has several disadvantages. In particular, due to the sliding friction, the force required to open the cassette is relatively large.

Desgleichen sind zur Rückstellung relativ grosse Federkräfte bzw. starke Federn erforderlich. Ferner ist die bekannte Kassette trotz des einfachen Aufbaues nicht einfach montierund demontierbar. Dieser Mangel ist besonders bei Röntgenfilmkassetten nachteilig, da bei diesen die auf der Andrückplatte sitzenden Verstärkungsschirme zeitweise ausgewechselt werden müssen.Likewise, relatively large spring forces or strong springs are required for resetting. Furthermore, the known cassette is not easy to assemble and disassemble despite the simple structure. This defect is particularly disadvantageous in the case of X-ray film cassettes, since the reinforcing screens on the pressure plate have to be replaced at times.

Bei der erfindungsgemässen Filmkassette werden diese Nachteile dadurch vermieden, dass jeder Schubstange zumindest ein durch diese bewegbares rundes Teil zugeordnet ist, das bei einem Anhebeansatz angeordnet ist und sich in der ersten Stellung der Schubstange auf dem einen Winkelschenkel eines abgewinkelten Teils befindet, welcher Winkelschenkel unterhalb von mindestens einem Teil des Anhebeansatzes liegt, so dass bei der Bewegung der Schubstange aus der ersten in die zweite Stellung das runde Teil von der Schubstange auf dem abgewinkellen Teil bis auf dessen anderen Winkelschenkel bewegt wird, wodurch der anfangs mit der Andrückplatte parallele eine Winkelschenkel nach oben verschwenkt wird, so dass der Anhebeansatz und damit die Andrückplatte zusammen mit einer lichtabschirmenden Einrichtung, welche bei geschlossener Kassette das Eindringen von Licht durch die Oeffnung in die Kassette verhindert, zum Oeffnen der Kassette gehoben wird.In the film cassette according to the invention, these disadvantages are avoided in that each push rod is assigned at least one round part which can be moved by it, which is arranged at a lifting attachment and, in the first position of the push rod, is located on one angle leg of an angled part, which angle leg below At least part of the lifting attachment is located, so that when the push rod is moved from the first to the second position, the round part is moved from the push rod on the angled part to its other angle leg, as a result of which an angle leg initially parallel to the pressure plate moves upwards is pivoted so that the lifting attachment and thus the pressure plate are lifted together with a light-shielding device which, when the cassette is closed, prevents light from penetrating through the opening into the cassette to open the cassette.

' Eine bevorzugte Ausführungsform der erfindungsgemässen Filmkassette ist dadurch gekennzeichnet, dass die Andrückplatte an jeder Seitenkante mehrere Anhebeansätze aufweist, bei welchen je ein rundes'Teil und ein abgewinkeltes Teil vorhanden ist. Hierdurch wird ein besonders gleichmässiges Anheben der Andrückplatte erreicht.A preferred embodiment of the film cassette according to the invention is characterized in that the pressure plate has several lifting lugs on each side edge, each of which has a round part and an angled part. This results in a particularly even lifting of the pressure plate.

Nachfolgend wird die Erfindung anhand von bevorzugten Ausführungsformen unter Bezugnahme auf die anliegenden Zeichnungen im einzelnen beschrieben. Es zeigen:

  • Fig. 1 eine Seitenansicht einer Filmkassette gemäß der Erfindung;
  • Fig. 2 eine Draufsicht auf die gleiche Filmkassette, wobei die vordere bzw. obere Platte zum Teil entfernt ist;
  • Fig 3 eine in Einzelteile aufgelöste Teilansicht der gleichen Kassette.
  • Fig. 4.1 bis 4.3 schematische Schnittansichten von drei Stellungen einer in Fig. 2 und 3 wiedergegebenen Rolle, wenn sie mittels einer Schubstange bewegt wird;
  • Fig. 5 eine schematische Teilansicht eines Teils der Kassette, wobei eine weitere Ausführungsform einer Rolle mit nur einem ihr zugeordneten, abgewinkelten Teil dargestellt ist; und
  • Fig. 6.1 und 6.2 die Lage der Rolle in den offenen und geschlossenen Stellungen der Kassette der Fig. 5.
In the following, the invention is described in detail on the basis of preferred embodiments with reference to the attached drawings. Show it:
  • Fig. 1 is a side view of a film cassette according to the invention;
  • Figure 2 is a plan view of the same film cassette with the front and top plates partially removed.
  • Fig. 3 is an exploded partial view of the same cassette.
  • 4.1 to 4.3 are schematic sectional views of three positions of a roller shown in FIGS. 2 and 3 when it is moved by means of a push rod;
  • 5 shows a schematic partial view of a part of the cassette, a further embodiment of a roller with only one angled part assigned to it being shown; and
  • 6.1 and 6.2 the position of the roller in the open and closed positions of the cassette of FIG. 5th

Bezüglich der Offenbarung der Erfindung wird wegen deren großen Klarheit und Anschaulichkeit ausdrücklich auf die Zeichnungen bezug genommen. In Fig. 1 weist eine Kassette einen vierseitigen Rahmen 1 auf, bei welchem an einem Ende eine schlitzförmige Öffnung 2 vorgesehen ist. Eine vordere bzw. obere Platte 3 und eine hintere bzw. untere Platte 4 vervollständigen die flache sechsseitige Kassette. In Fig. 1 sind auch die Enden von zwei Schubstangen 5 dargestellt.With regard to the disclosure of the invention, because of its great clarity and clarity, express reference is made to the drawings. In Fig. 1, a cassette has a four-sided frame 1, in which a slot-shaped opening 2 is provided at one end. A front and top plate 3 and a rear and bottom plate 4 complete the flat six-sided cassette. In Fig. 1, the ends of two push rods 5 are also shown.

In Fig. 2 bis 4 sind die gleichen Teile mit denselben Bezugszeichen bezeichnet. In Fig. 2 sind alle vier Seiten des Rahmens 1 dargestellt. Jedoch ist die vordere bzw. obere Platte 3 teilweise entfernt, um Einzelheiten einer Schubstange 5 zu zeigen. Am Ende jeder Schubstange 5 ist eine Feder 6 vorgesehen (wobei in dieser Figur jedoch nur eine Stange und eine Feder dargestellt sind). Unter der vorderen bzw. oberen Platte 3 ist eine Andrückplatte 6 gehaltert. An dieser Andrückplatte 6 sind zum An-oder Hochheben eine Anzahl Ansätze 7 angebracht.2 to 4, the same parts are designated by the same reference numerals. 2 all four sides of the frame 1 are shown. However, the front or top plate 3 is partially removed to show details of a push rod 5. A spring 6 is provided at the end of each push rod 5 (only one rod and one spring being shown in this figure). A pressure plate 6 is held under the front or upper plate 3. A number of lugs 7 are attached to this pressure plate 6 for lifting or lifting.

Der Schubstange 5 sind zwei Rollen 8 zugeordnet. Jede Rolle 8 sitzt auf einem unteren abgewinkelten Teil 9 (von welchem in Fig. 2 jedes Ende mit 9 bezeichnet ist). Über jeder Rolle befindet sich ein oberes abgewinkeltes Teil 10. Diese Anordnung ist in einer in Einzelteile aufgelösten, perspektivischen Darstellung in Fig. 3 wiedergegeben.The push rod 5 are assigned two rollers 8. Each roller 8 sits on a lower angled part 9 (of which each end is designated by 9 in FIG. 2). There is an upper angled part 10 above each roll. This arrangement is shown in a perspective view in FIG. 3, broken down into individual parts.

Jeweils zwei obere abgewinkelte Teile 10 sind durch ein Verbindungs- oder Halterungsteil 11 miteinander verbunden. An jedem Halterungsteil 11 sind eine Anzahl Blatt- oder Flachfedern 12 angebracht. Ferner ist eine lichtabschirmende Einrichtung 14 vorgesehen, welche das Eindringen von Licht in die Kassette verhindert, wenn die Kassette geschlossen ist.Two upper angled parts 10 are connected to one another by a connecting or holding part 11. A number of leaf or flat springs 12 are attached to each mounting part 11. Furthermore, a light-shielding device 14 is provided which prevents light from entering the cassette when the cassette is closed.

In Fig. 3 ist die Lage der Rolle 8 zwischen dem oberen und dem unteren abgewinkelten Teil 10 bzw. 9 dargestellt. In Fig. 3 ist die an dem Halterungsteil 11 angebrachte Blattfeder 12 so dargestellt, daß sie nach unten auf die Andrückplatte 6 drückt. Die Rolle 8 ist neben einem Anhebeansatz 7 dargestellt, welcher an der Andrückplatte 6 angebracht ist.In Fig. 3, the position of the roller 8 between the upper and lower angled part 10 and 9 is shown. In Fig. 3, the leaf spring 12 attached to the holding part 11 is shown so that it presses down on the pressure plate 6. The roller 8 is shown next to a lifting lug 7 which is attached to the pressure plate 6.

Die Schubstange 5 ist zurückgezogen aus ihrer Lage in der Kassette dargestellt. An der Schubstange 5 sind zwei Ansätze oder Vorsprünge 13 angebracht, mittels weichen eine Rolle eingestellt und in eine entsprechende Lage bringbar ist. Die Rolle 8 paßt genau zwischen die Ansätze 13, und wenn die Schubstange 5 bewegt wird, wird auch die Rolle zusammen mit der Schubstange bewegt.The push rod 5 is shown withdrawn from its position in the cassette. On the push rod 5 two lugs or projections 13 are attached, a roller is set by means of soft and can be brought into a corresponding position. The roller 8 fits exactly between the lugs 13, and when the push rod 5 is moved, the roller is also moved together with the push rod.

In Fig. 4.1 ist die Kassette in der geschlossenen Stellung dargestellt. Hierbei sitzt die Rolle 8, die zwischen den an der Schubstange 5 angebrachten Ansätzen 13 angeordnet ist, auf dem längeren, ebenen Teil des unteren abgewinkelten Teils 9. Der lange flache Teil des oberen abgewinkelten Teils 10 liegt ebenfalls auf der Rolle. In dieser Lage drücken die an dem Halterungsteil 11 angebrachten Blattfedern 12 die Andrückplatte 6 nach unten, welche durch eine gestrichelte Linie angedeutet ist. Der Anhebeansatz 7 ist über dem flachen Teil des abgewinkelten Teils 9 festgelegt und angeordnet. Dies entspricht der ersten Stellung der Schubstange.4.1 shows the cassette in the closed position. Here, the roller 8, which is arranged between the attachments 13 attached to the push rod 5, sits on the longer, flat part of the lower angled part 9. The long flat part of the upper angled part 10 also lies on the roller. In this position, the leaf springs 12 attached to the holding part 11 press the pressure plate 6 downwards, which is indicated by a broken line. The lifting lug 7 is fixed and arranged over the flat part of the angled part 9. This corresponds to the first position of the push rod.

In Fig. 4.2 ist die Rolle 8 mittels der Schubstange 5 entlang der abgewinkelten Teile 9 und 10 bewegt worden. Hierdurch ist dann das obere, abgewinkelte Teil 10 etwas gedreht und geschwenkt worden, so daß die Blattfedern 12 nicht mehr länger nach unten auf die Andrückplatte 6 drücken.4.2, the roller 8 has been moved along the angled parts 9 and 10 by means of the push rod 5. As a result, the upper, angled part 10 has been slightly rotated and pivoted so that the leaf springs 12 no longer press down on the pressure plate 6.

In Fig. 4.3 ist die Rolle 8 mittels der Schubstange 5 gerade entlang der abgewinkelten Teile 9 und 10 bewegt worden. Hierdurch ist dann der anfangs ebene Teil des unteren abgewinkelten Teils 9 nach oben verschwenkt worden. Hierdurch ist dann der Ansatz 7 angehoben worden, welcher seinerseits die Andrückplatte 6 anhebt, an welcher er angebracht ist. Hierbei ist die Endstellung der Andrückplatte 6 wiedergegeben, die bezüglich der hinteren bzw. unteren Platte 4 nach oben angehoben ist. Die Schubstange 5 befindet sich nunmehr in ihrer zweiten Stellung, und die Kassette ist offen.In Fig. 4.3, the roller 8 has just been moved by means of the push rod 5 along the angled parts 9 and 10. As a result, the initially flat part of the lower angled part 9 has then been pivoted upward. As a result, the neck 7 has been raised, which in turn lifts the pressure plate 6 to which it is attached. The end position of the pressure plate 6 is shown here, which is raised upwards with respect to the rear or lower plate 4. The push rod 5 is now in its second position and the cassette is open.

In Fig. 5 sind mit den Bezugszeichen 6 bis 9 und 12 dieselben Teile wie in den vorhergehenden Figuren bezeichnet. In dieser Ausführungsform, welche in derselben Ansicht wie Fig. 3 wiedergegeben ist, ist an dem unteren abgewinkelten Teil 9 ein Verbindungsstück 15 angebracht, welches abaeboaen ist. um ein Blattfeder-Halterungsteil 16 zu bilden. Dieses Halterungsteil ist auf der anderen (nicht dargestellten) Seite der Kassette mit einem ähnlichen Verbindungsstück verbunden.In Fig. 5, reference numerals 6 to 9 and 12 denote the same parts as in the previous figures. In this embodiment, which is shown in the same view as FIG. 3, a connecting piece 15 is attached to the lower angled part 9, which is abaeboaen. to form a leaf spring support member 16. This mounting part is connected to a similar connector on the other side (not shown) of the cassette.

In Fig. 6 sind zwei Stellunqen der Rolle 8 bezüglich des unteren abgewinkelten Teils 9 wiedergegeben. In Fig. 6.1 ist die Kassette geschlossen. Die Rolle 8 sitzt auf dem langen ebenen Teil des abgewinkelten Teils 9. In dieser Stellung drückt die Blattfeder 12 gegen die Andrückplatte 6. In Fig. 6.2 befindet sich die Kassette in der offenen Stellung. In diesem Fall ist die Rolle 8 bewegt worden, so daß der längere Teil des abgewinkelten Teils 9 nach oben geschwenkt worden ist, wodurch der Ansatz 7 und die Andrückplatte 6 angehoben sind, an welcher der Ansatz 7 angebracht ist. Gleichzeitig ist die Blattfeder 12 angehoben worden, so daß sie nicht mehr gegen die Andrückplatte 6 drückt. Die Endstellung der Andrückplatte 6 ist somit in Fig. 6.2 wiedergegeben.6 shows two positions of the roller 8 with respect to the lower angled part 9. In Fig. 6.1 the cassette is closed. The roller 8 sits on the long flat part of the angled part 9. In this position, the leaf spring 12 presses against the pressure plate 6. In Fig. 6.2, the cassette is in the open position. In this case, the roller 8 has been moved so that the longer part of the angled part 9 has been pivoted upwards, as a result of which the attachment 7 and the pressure plate 6 to which the attachment 7 is attached are raised. At the same time, the leaf spring 12 has been raised so that it no longer presses against the pressure plate 6. The end position of the pressure plate 6 is thus shown in Fig. 6.2.

Die vorderen bzw. oberen und die hinteren bzw. unteren Platten 3 und 4 sind feststehende, unbewegliche Platten; das bedeutet, daß sie während der Entnahme oder während des Ladens der Kassette nicht bewegt oder angehoben werden. Es ist jedoch möglich, beide Platten von dem Rahmen 1 zu entfernen, um die Kassette zu zerlegen und auseinanderzunehmen.The front or upper and the rear or lower plates 3 and 4 are fixed, immovable plates; this means that they will not be moved or lifted while the cartridge is being removed or loaded. However, it is possible to remove both plates from the frame 1 in order to disassemble and disassemble the cassette.

Während des Betriebs befindet sich die erfindungsgemäße Filmkassette normalerweise in geschlossenem Zustand, in welchem die Andrückplatte 6 durch die Blattfedern 7 gegen die hintere bzw. untere Platte 4 gedrückt wird. Um die Kassette mit einem Film zu laden, wird sie dann in eine Öffnung in einer Filmausgabeeinrichtung eingesetzt, wie beispielsweise in der britische Patentanmeldung 12 180/77 vom 23.3.1977 oder in der GB - PS 1 361 014 beschrieben ist. In einer derartigen Ausgabeeinrichtung ist das Ende der Kassette lichtdicht in die Ausgabeöffnung eingebracht. Zwei Stangen drücken dann nach unten auf die Schubstangen 5, so daß die Kassette geöffnet wird. Der Film wird dann in die Kassette eingelegt. Die Stangen, welche auf die Schubstangen 5 drükken, werden dann zurückgezogen, und die Kassette wird dadurch geschlossen. Sie kann dann aus der Ausgabeeinrichtung herausgenommen werden. Bei anderen Ausgabeeinrichtungen wird eine Kassette beim Einschieben in die lichtdichte Öffnung geöffnet und beim Herausnehmen aus der Offnung wird die Kassette dann wieder geschlossen. Der Film in der Kassette kann dann in üblicher Weise belichtet werden. Nach dem Belichten wird dann die Kassette umgedreht, sodaß der Schlitz nach unten zeigt. Die Kassette wird dann in einen Filmspeicher oder in eine Filmverarbeitungseinrichtung eingebracht. Die Öffnung, in welche sie eingeführt wird, ist ebenfalls lichtdicht. Einrichtungen kommen dann mit den Schubstangen 5 in Eingriff, wodurch die Kassette geöffnet wird und der Film aufgrund der Schwerkraft in einen Aufnahmebehälter der Speicher -oder Verarbeitungseinrichtung fällt. Die Kassette wird dann geschlossen, wenn sie aus dieser Einrichtung herausgenommen wird. Sowohl die Filmausgabeeinrichtung als auch die Filmspeicher- oder Verarbeitungseinrichtung können sich in einem Filmbelichtungsraum mit Tageslicht befinden.During operation, the film cassette according to the invention is normally in the closed state, in which the pressure plate 6 is pressed against the rear or lower plate 4 by the leaf springs 7. In order to load the cassette with a film, it is then inserted into an opening in a film dispenser, as described, for example, in British patent application 12 180/77 of March 23, 1977 or in GB - PS 1 361 014. In such an output device, the end of the cassette is inserted into the output opening in a light-tight manner. Two rods then press down on the push rods 5 so that the cassette is opened. The film is then placed in the cassette. The bars which press on the push rods 5 are then withdrawn and the cassette is thereby closed. It can then be removed from the dispenser. With other dispensing devices, a cassette is opened when it is inserted into the light-tight opening and the cassette is then closed again when it is removed from the opening. The film in the cassette can then be exposed in the usual way. After the exposure, the cassette is then turned over so that the slot points downward. The cassette is then placed in a film store or in a film processing device. The opening into which it is inserted is also light-tight. Facilities then come with the push rods 5 engages, whereby the cassette is opened and the film falls into a receptacle of the storage or processing device due to gravity. The cassette is closed when it is removed from this device. Both the film output device and the film storage or processing device can be located in a film exposure room with daylight.

Claims (10)

1. A film cassette comprising a frame having a bottom plate and an upper plate and located therebetween a pressure plate for resiliently bearing against said bottom plate when the cassette is in the closed position but raised therefrom when the cassette is in the open position, there being provided at one end of the frame a slot aperture for loading or unloading a film, said pressure plate having at least one lifting tab connected thereto along each side thereof, with two push rods being located one at each side of the frame for linear movement between a first position in which the cassette is closed and a second position in which the cassette is open, characterised in that there is assigned to each push rod (5) at least one round member (8) which can be moved thereby, said round member being located at a lifting tab (7) and resting in the first position of the push rod on one angle limb of a bellcrank member (9), said angle limb being positioned below at least one part of the lifting tab, such that the movement of the push rod from the first position into the second position causes the round member resting on the ballcrank member to move to the other angle limb thereof, whereby the angle limb initially parallel to the pressure plate is pivoted upwards, such that the lifting tab, and with it the pressure plate together with a light-shielding means (14) which prevents light from entering the cassette through the aperture (2) when the cassette is closed, is raised to open the cassette.
2. A film cassette according to claim 1_, characterised in that the pressure plate (6) has on each side several lifting tabs (7) for each of which there is provided one round member (8) and one bellcrank member (9).
3. A film cassette according to claim 2, characterised in that each lifting tab (7) on one side of the pressure plate (6) has an identical tab directly opposite thereto on the other side of the pressure plate.
4. A film cassette according to claim 3, characterised in that each pair of members consisting of a round member (8) and a bellcrank member (9) has a like pair of members directly opposite thereto on the other side of the cassette, forming a series of pairs of round members and bellcrank members along side of the cassette.
5. A film cassette according to any one of claims 1 to 4, characterised in that the round member (8) is a roller, ball or wheel.
6. A film cassette according to any one of claims 1 to 5, characterised in that the pressure plate (6) is resiliently pressed against the back or lower plate (4) by a number of leaf springs (12).
7. A film cassette according to any one of claims 1 to 6, characterised in that a second bellcrank member (10) is mounted above the round member (8), such that the round member can cause it to pivot.
8. A film cassette according to claim 7, characterised in that the second bellcrank member (10) is connected to an equivalent second bellcrank member (10) on the other side of the cassette by means of a holding and connecting member (11) to which there are attached leaf springs.
9. A film cassette according to any one of claims 1 to 8, characterised in that an X-ray intensifying screen is mounted on the inside of the back or lower plate, and an X-ray intensifying screen is mounted on the underside of the pressure plate (6).
10. A film cassette according to any one of claims 1 to 9, characterised in that the two push rods (5) are spring loaded (6).
EP19780100400 1977-07-22 1978-07-14 Cartridge provided with a film-press plate for sheet-like film material, especially a radiographic film Expired EP0000522B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3084977 1977-07-22
GB3084977 1977-07-22

Publications (2)

Publication Number Publication Date
EP0000522A1 EP0000522A1 (en) 1979-02-07
EP0000522B1 true EP0000522B1 (en) 1981-01-07

Family

ID=10314103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780100400 Expired EP0000522B1 (en) 1977-07-22 1978-07-14 Cartridge provided with a film-press plate for sheet-like film material, especially a radiographic film

Country Status (3)

Country Link
EP (1) EP0000522B1 (en)
JP (1) JPS5452528A (en)
DE (1) DE2860413D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57110555U (en) * 1980-12-26 1982-07-08

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1218873B (en) * 1964-01-24 1966-06-08 Gen Aniline & Film Corp Cassette for radiographic film material u. like
CH520948A (en) * 1969-03-29 1972-03-31 Minnesota Mining & Mfg X-ray cassette
US3930165A (en) * 1974-10-21 1975-12-30 U S Radium Corp Cassette

Also Published As

Publication number Publication date
JPS5452528A (en) 1979-04-25
EP0000522A1 (en) 1979-02-07
DE2860413D1 (en) 1981-02-26

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