EP0000690A1 - Dispositif de radiophotographie - Google Patents

Dispositif de radiophotographie Download PDF

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Publication number
EP0000690A1
EP0000690A1 EP7878100141A EP78100141A EP0000690A1 EP 0000690 A1 EP0000690 A1 EP 0000690A1 EP 7878100141 A EP7878100141 A EP 7878100141A EP 78100141 A EP78100141 A EP 78100141A EP 0000690 A1 EP0000690 A1 EP 0000690A1
Authority
EP
European Patent Office
Prior art keywords
film
sheet
mounting frame
stack
screens
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.)
Granted
Application number
EP7878100141A
Other languages
German (de)
English (en)
Other versions
EP0000690B1 (fr
Inventor
Gunter Schmidt
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to DE8080107552T priority Critical patent/DE2862448D1/de
Publication of EP0000690A1 publication Critical patent/EP0000690A1/fr
Application granted granted Critical
Publication of EP0000690B1 publication Critical patent/EP0000690B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • G03B42/045—Holders for X-ray films apparatus for loading or unloading the holders
    • 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
    • G03B42/021—Apparatus for direct X-ray cinematography

Definitions

  • This invention relates, generally, to the exposure of X-ray film and, more particularly, to the handling of such film in a daylight environment.
  • the image of an X-ray film can be enhanced by the use of intensifier screens lying intimately against opposite faces of the film.
  • an X-ray unit of relatively simple design which can hold a film in intimate contact with intensifier screens, and which enables the insertion of a film between the screens and the removal therefrom in a simple manner.
  • the apparatus for holding the film against the intensifier screens includes a resilient backing plate behind the film-screen sandwich and a flexible thin sheet lying in front of the film-screen sandwich, with the opposite sides of the flexible sheet fastened to a mounting frame. With the opposite sides of the flexible sheet held to the mounting frame, a vertical pressing member is moved against the middle of the backing plate to bend it forward and push the film-screen sandwich into a curve that holds the film and screens in intimate contact. When the pressing member is moved back, a film sheet can be fed between the intensifier screens or an exposed film sheet can be allowed to drop out from between the screens by withdrawing supporting pins that would otherwise support the film.
  • Fig. 1 illustrates a chest X-ray unit 1 0 which includes a main frame 12, an exposure apparatus 14 mounted along the frame for holding a sheet of film 16, a dispenser 18 above the exposure apparatus for dispensing the film into the exposure apparatus, and an exposed film receiver 20 located below the exposure apparatus for receiving the exposed film.
  • the unit is prepared for operation by first loading a bulk film magazine 22 into a magazine-holding portion 24 of the dispenser. Then, a handle 26 on the main frame is pivoted to an upward position 26u to tip back a mounting frame 28 of the exposure apparatus 14 to a position for receiving a film from the dispenser, and a control on panel 30 is operated to cause the dispensing of a film into the exposure apparatus.
  • the handle 26 is moved into a downward position 26d which causes the film 16 to be held in the exposure apparatus closely against the intensifier screens. A patient then can be positioned in front of a cover 27 on the exposure apparatus 14 and an exposure made. Finally, the handle is moved up to its central position 26 and the film 16 drops down into the receiver 20.
  • Fig. 7a illustrates the arrangement of elements adjacent to film 16 in the exposure station 14.
  • the film 16 is sandwiched between a pair of intensifier screens 32, 34, and the screen and film sandwich is, in turn, sandwiched between a flexible front sheet 36 and a resilient backing plate 38.
  • the screens can be permanently attached to the flexible sheet and plate, respectively.
  • the intensifier screens 32, 34 In order to obtain a uniformly full exposure of the film 16 using a minimal level of X-rays, the intensifier screens 32, 34 must be held facewise against the film at all areas of the film. This must be accomplished without using a metal plate or other similar member in front of the film that could absorb a significant portion of X-rays.
  • Fig. 1A illustrates the basic manner in which the film 16 is held tightly to all areas of the intensifier screens 32, 34.
  • the backing plate 38 is constructed of a flexibly resilient material such as an 0.1 inch (2.54 mm) thick magnesium plate.
  • the front sheet 36 is constructed of a tough, flexible plastic such as Mylar® polyester film.
  • the opposite sides 40 of the front sheet are wrapped somewhat more than 180° about a pair of vertical mounting rods 42.
  • Each mounting rod is held in a hole presented by a pair of grooves 44, 46 formed respectively in inner and outer bars 48, 50 of the mounting frame 28.
  • the extreme sides of the sheet 36 are wrapped about thin retaining rods 52 which more securely hold the side of the sheet about the mounting rods 42.
  • An elongated vertical pressing bar 54 extends behind the.middle of the backing plate, halfway between the opposite sides of the front sheet.
  • the pressing bar 54 When the pressing bar 54 is moved forwardly, in the direction of arrow F, it bends the backing plate 38. Since the opposite sides 40 of the front sheet 36 are prevented from moving forwardly, the backing plate, intensifier screens, film and front sheet are all pushed into a gentle curve (Fig. 7b), with the intensifier screens 32, 34 and film 16 between them pressed into intimate contact at all areas of the film. The intensifier screens then can aid in achieving uniformly full exposure of the film. Of course, it would be possible to fix the position of the pressing bar 54 and instead move back the opposite sides of the front sheet.
  • the pressing or pusher bar 54 is attached to a forward channel member 56.
  • the channel member 56 carries a pair of rollers 58, 60 which bear against a rearward channel member 62.
  • the rearward channel member 62 has a pair of inclined slots 64, 66 at its upper and lower ends which receive a pair of cam members 68, 70 fixed to the mounting frame.
  • a chain 72 is provided to pull down the rearward channel member 62 against the bias of springs 73 (Figs. 2 and 3).
  • Springs 73 extend between the'fixed rod that mounts cams 68 and a rod 75 that extends through the flanges of channel 62.
  • Fig. 2 shows that the chain 72 that pulls down the rearward channel member 62 extends around a.rotatable pulley 74 and up to a tensioning pulley 76.
  • the tensioning pulley 76 is fixed to an operating shaft 78 to which the handle 26 is fixed.
  • Fig. 6 shows the three positions 28a, 28b, 28c of the mounting frame.
  • the top of the mounting frame is tilted back to receive the film 16.
  • the mounting frame is vertical and the intensifier screens are held tightly against the film in preparation for exposure of the film.
  • the mounting frame is vertical, but the film is loosely disposed between the intensifier screens so that the film 16 can drop down between a pair of rollers 80 in- film receiver 20.
  • Fig. 3 shows a cam 82 which is fixed to the operating shaft 78 and which controls backward pivoting of the mounting frame 28.
  • shaft 78 rotates and the cam 82 assumes position 82a; then, the mounting frame 28 can pivot back about an axis 84 to the position 28a.
  • the space between the intensifier screens is aligned with a guideway 86 through which a sheet of film is dispensed.
  • Springs 88 bias the top of the mounting frame rearwardly to assure such tipping.
  • Pins 83 extend laterally from arms 87 that are pivoted on a shaft 89. Arms 87 have tabs that engage stops on catches 90 that are pivoted on a shaft 91. As channels 56, 62 are moved rearwardly, after an exposure, catches 90 pivot arms 87 sufficiently to move pins 83 out from beneath the exposed film 16 (Fig. 7c). After the exposed film has dropped to receiver 20, the operating handle can be moved to position 26u. With the mounting frame in position 2&a, another film can be dispensed through guideway 86. As the frame moves to position 28a, the ends of catches 90 engage shaft 78 and the catches are pivoted sufficiently to move the stops away from the tabs on arms 87.
  • arms 87 swing forwardly in response to the action of springs 92 and pins 83 move into their film-supporting position (Fig. 7a).
  • the operating handle is moved to position 26d.
  • the channels 56, 62 move forward, and the screens move together (Fig. 7b).
  • the stops on catches 90 fall in behind the tabs on arms 87.
  • the intensifier screens 32, 34, with the film 16 therebetween can lie at least about three inches forward of the dispenser 18, or at least the bottom portion thereof, where the head of a patient would be positioned during the taking of a chest X-ray.
  • handle 26 is moved to its central position. Rearward movement of channels 56, 62, responsive to the action of springs 73, also moves catches 90, arms 87 and pins 83 rearwardly. As noted previously, withdrawal of the pins 83 (Fig. 7c) releases the exposed film to receiver 20.
  • Figs. 8-16 illustrate details of the film dispenser 18 which dispenses one film at a time into the exposure apparatus.
  • the holding portion 24 of the dispenser has a cover 100 that can be swung.open to receive the film-holding magazine 22.
  • the film magazine 22 has a lid 102 at the top that can be opened to receive a stack of film sheets in a darkroom and which then can be closed to make the magazine lighttight.
  • the magazine 22 encounters a pair of pins 104 that open a light seal at the bottom and a receptacle 106 that receives a mating plug on the magazine.
  • Fig. 8-16 illustrate details of the film dispenser 18 which dispenses one film at a time into the exposure apparatus.
  • the holding portion 24 of the dispenser has a cover 100 that can be swung.open to receive the film-holding magazine 22.
  • the film magazine 22 has a lid 102 at the top that can be opened to receive a stack of film sheets in a darkroom and which then can be closed to
  • FIG. 10 illustrates the light seal 108 at the bottom of the magazine 22, and shows the pair of rods 110 that are attached to the light seal.
  • Fig. 12 illustrates the magazine 22 installed in the holder portion 24 of the dispenser, showing how the pins 104 on the holder depress the rods 110 to slide the light seal 108 against biasing of springs 112 so that a film sheet 16 can pass down through the dispenser.
  • the magazine 22 includes a vertical pusher plate 114 whose upper end carries a pair of guides 116 that can move forwardly along downwardly inclined guideways l18 in a pair of guide plates 120.
  • the pusher plate 114 is therefore urged by gravity to move forward, to push a stack of film 16S forwardly and down along an inclined support plate 122.
  • the frontmost film is caught between a dispenser roller 124 and blocks 126 at the bottom of the pusher plate.
  • the blocks 126 which are especially useful for pushing the last films of the stack into the roller, are constructed of low friction material such as a Delrin® acetal resin.
  • the low friction material of the blocks 126 aids them in sliding down along a lower support plate 127 and in assuring that when the blocks push the last film against the drive roller 124 the blocks do not retard the film from moving down.
  • the forward edge 122e of the upper support plate 122 is accurately spaced from the drive roller 124 to form a throat 129 between them that permits only one sheet to pass down through the throat.
  • the edge 122e may be spaced a distance such as twelve mils (0.0305 mm) from the roller.
  • the edge 122e may be formed of a low friction material such as a Teflono fluorocarbon resin to facilitate the passage of film thereby.
  • the magazine is normally loaded with film in a darkroom by laying the holder horizontally.and then laying a stack of film on the pusher plate 114.
  • the holder is turned to the vertical as shown in Fig. 10, or is moved around, it is possible for more than one sheet to be pushed into the space above the support plate edge 122e and the drive roller 124.
  • a backup member 128 is provided which can push the stack of film rearwardly, to push back sheets which have started to gather in and above throat space 129 and the roller.
  • the backup member 128 is pivotally mounted at 130 and has a button 132 protruding from the film holder housing to enable a technician to press the button after he has loaded the magazine 22 in holding portion 24.
  • the backup member is also useful in that when its end 128e pushes back the stack and quickly releases it, the member bends the sheets and "shakes up" the stack. Any film sheets which have not fallen down firmly onto the support plate 122 will do so, and the film sheets will lie in a more uniform arrangement for reliable dispensing.
  • a drive pin 134 (Fig. 15) at the end of the drive roller 124 lies in the path of a drive tab 136 which lies on a motor driven wheel.
  • the drive roller 124 is rotated, as indicated in Fig. 10, to move down one film sheet past a microswitch 138, the thin arm of the microswitch deflecting out of the way of the film.
  • the film then passes through a guideway 140 and through the guideway 86 into the exposure apparatus 14.
  • Microswitch 138 is connected to a power source and to control panel 30 through receptacle 106.
  • the invention provides an X-ray unit which enables the daylight loading of one sheet at a time into an exposure station and the tight holding of that film sheet to intensifier screens at the exposure station, all with a relatively simple and low cost apparatus.
  • the close holding of the film sheet to the intensifier screens is accomplished by the use of a flexible plastic sheet, whose opposite sides are securely held, a resilient backing plate, and a pressing bar that pushes along the center line of the resilient backing plate to deform it forwardly.
  • the mounting frame that holds the flexible front sheet, backing plate, and pressing bar is pivotally mounted to enable its top to pivot back to receive a new sheet of film from a dispenser located far enough behind the exposure station to avoid interference with the taking of chest X-rays.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Pile Receivers (AREA)
EP78100141A 1977-06-13 1978-06-13 Dispositif de radiophotographie Expired EP0000690B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8080107552T DE2862448D1 (en) 1977-06-13 1978-06-13 Apparatus for receiving a stack of film sheets and dispensing one film sheet at a time

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80581577A 1977-06-13 1977-06-13
US805815 1977-06-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP80107552.4 Division-Into 1978-06-13

Publications (2)

Publication Number Publication Date
EP0000690A1 true EP0000690A1 (fr) 1979-02-21
EP0000690B1 EP0000690B1 (fr) 1983-10-19

Family

ID=25192576

Family Applications (2)

Application Number Title Priority Date Filing Date
EP78100141A Expired EP0000690B1 (fr) 1977-06-13 1978-06-13 Dispositif de radiophotographie
EP80107552A Expired EP0030677B1 (fr) 1977-06-13 1978-06-13 Appareil pour la réception d'une pile de feuilles de film et pour la distribution d'une feuille de film à la fois

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP80107552A Expired EP0030677B1 (fr) 1977-06-13 1978-06-13 Appareil pour la réception d'une pile de feuilles de film et pour la distribution d'une feuille de film à la fois

Country Status (7)

Country Link
EP (2) EP0000690B1 (fr)
JP (2) JPS5417690A (fr)
AU (1) AU518331B2 (fr)
BR (1) BR7803755A (fr)
CA (1) CA1110100A (fr)
DE (1) DE2862339D1 (fr)
IT (1) IT1096637B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386290B (de) * 1977-09-20 1988-07-25 Licinvest Ag Bildbetrachtungsgeraet
WO2017029209A1 (fr) 2015-08-14 2017-02-23 S.A. Lhoist Recherche Et Developpement Procédé de fabrication d'hydroxyde de calcium hautement poreux et produit ainsi obtenu

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140564A (en) * 1961-02-20 1964-07-14 Mohasco Ind Inc Sound insulating apparatus having movable partition
JPS5994340U (ja) * 1982-12-15 1984-06-27 コニカ株式会社 Ｘ線撮影装置
EP0236904B1 (fr) * 1986-03-12 1991-06-05 Minnesota Mining And Manufacturing Company Réservoir alimenté par un film à rayons X, utilisable dans un appareil à traitement de film automatique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR617604A (fr) * 1926-06-16 1927-02-23 Dispositif pour la prise de radiographies en série, sous le contrôle de la radioscopie
US3233101A (en) * 1962-08-06 1966-02-01 Leslie M Forsyth X-ray film and screen exposure holder with separate means for applying contact pressure thereto
DE2123208A1 (de) * 1971-05-11 1972-11-23 Siemens AG, 1000 Berlin u. 8000 München Aufnahmegerät für direkte Röntgenfotografie

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1961401A (en) * 1932-10-17 1934-06-05 United Shoe Machinery Corp Mechanism for feeding signatures
US2652248A (en) * 1948-10-09 1953-09-15 Bell & Howell Co Automatic sheet separating and feeding mechanism
US2764409A (en) * 1953-06-18 1956-09-25 Bombard Leon E La Method and apparatus for friction feeding of sheets
US3138322A (en) * 1962-09-18 1964-06-23 Louis J Orlando Perforator
US3265384A (en) * 1964-08-31 1966-08-09 Eastman Kodak Co Film sheet feeder
FR1548226A (fr) * 1967-12-28 1968-11-29
US3790160A (en) * 1970-07-07 1974-02-05 Production Inc Daylight film handling system
US3934735A (en) * 1970-07-07 1976-01-27 Productron, Inc. Daylight film handling system
DE2351542C3 (de) * 1973-10-13 1981-01-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arbeitsplatz für die Untersuchung von Patienten mittels Röntgenstrahlen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR617604A (fr) * 1926-06-16 1927-02-23 Dispositif pour la prise de radiographies en série, sous le contrôle de la radioscopie
US3233101A (en) * 1962-08-06 1966-02-01 Leslie M Forsyth X-ray film and screen exposure holder with separate means for applying contact pressure thereto
DE2123208A1 (de) * 1971-05-11 1972-11-23 Siemens AG, 1000 Berlin u. 8000 München Aufnahmegerät für direkte Röntgenfotografie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386290B (de) * 1977-09-20 1988-07-25 Licinvest Ag Bildbetrachtungsgeraet
WO2017029209A1 (fr) 2015-08-14 2017-02-23 S.A. Lhoist Recherche Et Developpement Procédé de fabrication d'hydroxyde de calcium hautement poreux et produit ainsi obtenu

Also Published As

Publication number Publication date
EP0000690B1 (fr) 1983-10-19
IT1096637B (it) 1985-08-26
EP0030677A3 (en) 1981-10-28
JPS5417690A (en) 1979-02-09
BR7803755A (pt) 1979-04-17
EP0030677B1 (fr) 1984-10-17
JPH0417939Y2 (fr) 1992-04-22
DE2862339D1 (en) 1983-11-24
JPS58126452U (ja) 1983-08-27
AU518331B2 (en) 1981-09-24
EP0030677A2 (fr) 1981-06-24
IT7824478A0 (it) 1978-06-12
AU3705478A (en) 1979-12-20
CA1110100A (fr) 1981-10-06

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