摘要:
A flexible character-indentable plastics embossing tape (11) is backed by and bonded to a lead strip not more than 0.025 inches (ie. approximately 0.65 millimetres) thick, to form a tape suitable for identifying radiographs. The lead strip (13) is itself backed by a relatively thin and flimsy plastics or fabric strip (15) which, when removed, allows the lead (and hence the lead-plastic tape as a whole) to be pressure-bonded to the surface to be radiographed. A conventional tape-embossing gun is used to indent the desired characters in succession, and in order, into the lead-backed tape, without necessarily severing the lead; and then the backing strip (15) is peeled away to expose the layer (14) of adhesive which pressure-bonds the indented tape to the object to be radiographed. X-rays incident on the embossed tape will cause the raised characters (a) to show up dark on the subsequently-developed film, whilst the raised side areas (b) will show up white. Each character will thus stand out on the developed film.
摘要:
in a spot film device, a cassette assembly (41) for X-ray film is mounted for reciprocation in a tunnel (3) between an X-ray exposure position (31) and a position (32) in which the cassette is automatically unloaded or loaded with film. Field defining masks (5, 6) are also mounted for translation selectively within the tunnel (3). The masks (5, 6) are formed by supporting plate (5b, 6b) of synthetic material having minimal X-ray absorption and high rigidity, and without an aperture, and attached plates (5a, 6a) of X-ray shielding material which define a sharp X-ray field.
摘要:
Die Röntgen-Filmkassette weist ein Bodenteil, ein Deckelteil, Verbindungselemente zum Verschließen der beiden Kassettenteile, mindestens eine Verstärkungsfolie (9), eine zur Filmgröße etwa gleiche große Magnetplatte und eine auf die Magnetkraft der Magnetplatte ansprechende Gegenplatte auf. Dabei sind Film (11) und Verstärkungsfolie (9) zwischen Magnetplatte und Gegenplatte gehalten und Magnetplatte und/oder Gegenplatte sind elastisch an ihrem Kassettenteil angebracht. Zur Vermeidung von Lufteinschlüssen zwischen Verstärkungsfolie (9) und Film (11) weist die dem Film (11) zugewandte Seite einer jeden Verstärkungsfolie (9) eine rauhe Oberfläche mit einem Rauhheitsgrad von etwa 10 bis 60 µm, vorzugsweise 25 bis 50 µm, auf. Dabei kann diese Oberfläche durch formgebende Maßnahmen, vorzugsweise durch Prägen mittels einer heißen Prägewalze oder Rakeln gebildet werden. Es können aber auch zur Bildung der rauhen Oberfläche in die Verstärkungsfolie (9) Teilchen in Form von Körnchen oder Kügelchen (12) eingebracht werden, welche über die Oberfläche der an sich glatten Verstärkungsfolie hinaustragen.
摘要:
An apparatus for automatically developing radiographic plates comprises a frame (1) encompassing a dark compartment, a plurality of driving rollers (9) for transferring into the compartment a container of a radiographic plate to be developed, an assembly for opening the container and inserting the plate into a developing machine (42), and a fresh-plate locating bar (52) provided with a plurality of suckers (53) effective to grip a fresh radiographic plate and insert it into the container. Thus the entire radiographic plate developing process, including the replacement of the exposed plate with a fresh one inside the plate container, can be carried out in a fully automated manner.
摘要:
An apparatus for receiving a stack of film sheets (16) and dispensing one film sheet at a time comprises a housing wherein each film sheet extends in a largely vertical plane and a roller (124) at the lower end of the housing (22). Means (122) spaced slightly from the roller (124) normally allow only one film sheet at a time to pass by that roller (124). A backing device (114) is disposed in the housing (22) with a lower end thereof on a side of the region opposite the roller (124) and is urged to move so its lower end moves towards the roller (124) to push a film sheet (16) against the roller (124). The apparatus makes it possible to dispense a film sheet into an exposure apparatus under day light conditions.
摘要:
Bei Tageslicht be- und entladbare Kassette für blattförmiges Filmmaterial, insbesondere Röntgenfilm, mit einer Filmandrüdcplatte (6). Die Filmandrückplatte (6) ist mittels längsverschiebbaren Stangen (5) und einem Winkelhebel-Rollen- Mechanismus (8,9) heb-und senkbar. Die Stangen (5) sind von der mit dem Be- und Entladeschlitz versehenen Stirnseite derl Kassette aus betätigbar. Der Be- und Entiadeschlitz wird dabei sinngemäss geöffnet oder lichtdicht geschlossen.
摘要:
A film package containing a stack of notched films in a lighttight envelope is held vertically in a lighttight loading chamber by a clamp member engaging with the notches of the films. The lower end of the envelope is cut, and the envelope is moved vertically relative to the films until the films are projected from the lower end of the envelope while the films are clamped by the clamp member. The clamp member is then disengaged from the notches of the films, and the films are allowed to move down into a receiving chamber positioned under the loading chamber. Then, a shutter is closed between the receiving chamber and the loading chamber to shield the films in the receiving chamber from light.