摘要:
A device for embossing Braille characters on an embossable substrate includes a embossing wheel and an anvil. The head containing a series of locations. The locations contain a combination of pins or divots and are configured to print one or more columns of a Braille cell. The anvil is configured with a series of grooves for mating with the pins of the embossing wheel. Embossing occurs when the anvil or embossing wheel is moved against the other and the embossable substrate is made to conform to the depressions in the locations where a pin on the embossing wheel is positioned. An embossed Braille cell can be unembossed by aligning the divots in the Braille embossing wheel with ridges formed between the grooves of the anvil.
摘要:
A film cartridge comprising a cartridge housing, a film spool rotatable inside the housing, and first and second indicators fixed to the housing and to the film spool in order that the first indicator originally at least partially obscures the second indicator to provide an unused film indication and which are positionally reversed in response to spool rotation in a predetermined direction for the second indicator to then at least partially obscure the first indicator to provide a used film indication, is characterized in that the first and second indicators are first and second rings which each have a ring-admitting slit for receiving the other ring to allow the first and second rings to be positionally reversed in response to spool rotation in the predetermined direction, and at least one of the first and second rings has an integral pivotal flap at its ring-admitting slit which is angled not to move through the ring-admitting slit in the other ring and allow the first ring to continue to obscure the second ring when said film spool is rotated in an opposite direction and to move through the ring-admitting slit in the other ring to cause the first and second rings to move through the respective slits and be positionally reversed in response to spool rotation in the predetermined direction.
摘要:
A light weight x-ray cassette formed from Hylite which is an metal/polymer/metal material. The cassette comprises: a front panel and a back panel formed from the Hylite composite material with the front and the back panels being operatively hinged together by a hinging element attached to the panels so as to form a cavity between the panels; an x-ray film contained within the cavity between the first panel and the second panel; at least one intensifying screen held in contact with the x-ray film; and a latching element to open and close the cassette.
摘要:
A film assemblage comprising a spool core, and a filmstrip, a film leader and a film trailer which are to be wound as a single longitudinal strip on the spool core in a roll with the filmstrip extending between the film leader and the film trailer in order that the film leader, the filmstrip and the film trailer form a common inner side of the roll and a common outer side of the roll, is characterized in that the film trailer has a discrete cohesive patch located to be on the inner side of the roll and a discrete cohesive patch located to be on the outer side of the roll, which can only stick to one another other and not to the inner or outer sides of the roll, and which are spaced apart along the film trailer a distance substantially equal to the circumference of the roll, whereby when the film leader, the filmstrip and the film trailer are wound on the spool core with the film trailer being an innermost convolution of the roll and the film leader being an outermost convolution of the roll the cohesive patches will be separate from each other to prevent them from sticking to one another, but when the film leader, the filmstrip and the film trailer are wound on the spool core with the film leader being the innermost convolution of the roll and the film trailer being the outermost convolution of the roll the cohesive patches will be facing each other to stick to one another.
摘要:
A x-ray fill cassette for use with radiographic film. The cassette has a tube side unit and a cover unit. The units together define a film space for the film. The units are relatively pivotable between an open state and a closed state. The tube side unit is substantially convex in at least one of length and width dimensions when the traits are in the open state. The tube side unit is substantially flat in both length and width dimensions when the film is in the film space and the units are in the closed state. The tube side unit includes a compressible pad that adjoins the fill space. The cover unit includes a cover panel, a pressure panel, and an intensifying screen. The cover panel and the pressure panel are rigidly mounted in spaced parallel relation. The intensifying screen is adhered directly to the pressure panel adjoining the film space. The convexity of the tube side unit and the compressible pad are selected to impose on the film, when the film is in the closed state, a substantially uniform compressive force of from about 0.09 psi to about 0.35 psi.
摘要:
A film cassette comprising a base and a cover adapted to close upon and cooperate with the base. A pressure plate is disposed between the cover and the base. The cover, base and pressure plate form a light-tight space for receiving a sheet of film. At least one biasing member is provided for biasing the pressure plate against the base when the cover is closed on the base. The pressure plate and base each having a configuration such that when the cassette is closed, a predetermined pressure distribution is applied to a sheet of film placed in the cassette. There is also provided a method of making a cassette which includes steps for defining a specific shape for the fabricated cassette such that the cassette will provide improved performance during use.
摘要:
A web-spool for a cartridge comprises a cylindrical core having an outer periphery at each end thereof with at least one core lug and an annular ring extending radially outward from each periphery in axially spaced relation to form a core peripheral groove therebetween at each core end. The annular rings at both core ends have respective inner tapered surfaces that face each other to initially guide a web being wound onto the core, and also to provide clearance between the wound web edges and adjacent core flanges, to thereby accommodate any web telescoping and thus permit the flanges to be readily secured to the core ends without interfering with the web edges. Each flange has an axially inner surface with an annular throat extending axially outward therefrom for receiving the core lug(s) and annular ring. Within the annular throat is at least one radially inwardly extending flange lug with recesses at both sides thereof, the flange lug(s) being adapted to nest within the core peripheral groove and the recesses being adapted to receive the core lug(s), when a core end is inserted into the flange throat and the core and flange are then turned relative to each other. Complementary ratchet teeth are provided on opposed mating surfaces of the core and flange, to permit relative rotation therebetween in one direction for securing the two together, and to prevent relative rotation in the opposite direction and consequent unintended disassembly of those members.
摘要:
An x-ray film cassette is disclosed which includes a window for allowing imaging of patient identification data onto a film in the cassette by light. The window includes a slidable member made from a single piece of plastics material folded onto itself to form two leaves. The two leaves are secured to one another except in a region adjacent the free end of one of the leaves. One of the leaves is stiff and the other is resiliently flexible. The stiff leaf faces outwardly of the cassette and has an aperture in a region overlying the unsecured region to the flexible leaf to allow a probe to deflect the unsecured region of the flexible leaf. The free end of the flexible leaf has catch means which cooperate with other catch means to prevent movement of the slidable member away from the closed position when the free end region of the second leaf is in the non-deflected condition. The catch means and the other catch means are disengaged from one another when the free end region of the flexible leaf has been deflected by a probe, thereby allowing the slidable member to move to the open position.
摘要:
A roll package comprising a spool, a length of web material wound about the spool, and a length of a protective material wound about the length of web material. The length of a protective material has a moisture vapor transmission rate of less than about 0.1 grams per one hundred square inches for 24 hours when tested at 100 degree F., 100 percent relative humidity. In a particular embodiment, the spool includes a core and a pair of flanges, each flange having an outwardly facing surface and an inwardly facing surface, the inwardly facing surface of each flange including a substantially planar portion adjacent an outer edge of the flange and a recessed portion inboard of the substantially planar portion. Edges of the protective material abut the substantially planar portion when wound about the length of web material such that the edges are held in intimate contact with the substantially planar portion to form a light seal barrier and a moisture vapor barrier seal.
摘要:
Black-and-white elements, such as radiographic films, can be processed in roomlight because they include certain light absorbing dyes and desensitizers. Processing of such elements can be achieved using a processing kit and a two-stage process carried out in the same light- and fluid-tight processing apparatus. In the first stage, development is initiated with a developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent and a sulfite. After an appropriate time, a non-sulfite fixing agent is introduced into the processing apparatus or container to provide a combined developing/fixing composition, and development and fixing are carried out simultaneously. The processing method is carried out quickly, usually within about 90 seconds. The presence of sulfite and high pH in both stages decolorizes or deactivates the particulate dyes. The processing kit includes the photographic element, a vessel containing a developing composition, a vessel containing fixing composition, and a light-tight, hand-held container for holding an exposed element as it is inserted into the first and second vessels to carry out processing.