Патент USA US2405645код для вставки
Aug“ ‘ 13, APPARATUS ‘ FOR PROCESSING R_ _]_ DUGUID PHOTOGRAPHIC FILMS' Filed April 29, 1944 3 Sheets-Sheet l Inventor, Roae'kz J Duguia’ 5y ‘ Aug. 13, 1946. ‘R. J. DUGU‘ID 2,405,645 APPARATUS FOR PROCESSING PHOTOGRAPHIC FILMS Filed April 29, 1944 3 Sheets-Sheet 2 ..-.....w..r_u l____ =1 ‘ , \ __\ \ .:_ >. H~ui; ,¢ e. .0(0 ,.41 #0. . 41MM 1F %7M(1/l\ x.4f\1.4Vw]. .MM Ray WnwJ.o,A5‘131a25VugQ?h» .k .V. 1T. . w/ ‘ 0w 0. . ' Aug. 13, 1946. ‘ R. J. DUGUID 2,405,645 APPARATUS FOR PROCESSING PHOTOGRAPHIG FILMS Filed April 29, 1944 ' a Sheets-Shéet K .INVENTOR, Rebel-t .-J0/17.2 Duiguz'd I Patented Aug. 13, 1946 ' 2,405,645 STATES PATENT OFFICE o 2,405,645 APPARATUS FOR PROCESSING PHOTOGRAPHIC FILMS Robert John Duguid, Aberdeen, Scotland - ‘ Application April 29, 1944, Serial No. 533,339 In Great Britain May 14, 1943 3 Claims. , (Cl. 95-905)‘ 1 2. This invention relates to apparatus for process Figure 1 is a perspective view looking on the outside of the apparatus; Figures 2 and 3 are perspective views at right angles to each other showing the internal frame with its endless carrier and associated parts re ing photographic films in comparatively long lengths such as cinematograph ?lms or similar ?lms employed for micro-copying or miniature camera work. The invention is concerned with apparatus of the type in-which the ?lm is traversed, in ex tended form, through a chamber or container moved from the tank; Figure 4 is a diagram showing the path of the endless carrier, ‘ Figure 5 is a diagram, similar to Figure 4, but be developing, ?xing, washing, bleaching or other 10 illustrating'a duplicated form of apparatus, em ploying four pairs of rollers. treatment, is e?ected. Figure 6 is an enlarged fragmentary view show According to this invention an apparatus of the ing means for coupling the conveyor belt to the above type is provided with means for traversing ?lm. the ?lm ?rst in a helical path proceeding in a Like reference numerals indicate like parts direction from one side or end of the treatment 15 within which the processing operation, which may chamber towards the other end and then in a helical path proceeding in the opposite, i. e. re turn, direction. . In the preferred form of'the invention the ap paratus comprises an endless carrier surface, such as an endless band, belt or chain, which is ar throughout the ?gures. Referring in the ?rst place to Figures 1 to 4, the treatment chamber comprises a tank ll] of sub stantial depth within which is located an open rectangular framework It supporting rollers on which an endless carrier band I2 is mounted. There are two pairs of rollers l3, l4 and l5,‘ l6, ranged to be traversed in succession in two op hereinafter referred to as the front pair and back positely directed parallel helical paths and means pair respectively, all mounted for rotation about for connecting the ?lm to the carrier surface for 25 parallel horizontal axes extending from one side _ movement therewith in the paths aforesaid. of the tank towards the other. The elements of In one. constructional form the apparatus em each pair are positioned, as shown, one vertically bodying the invention comprises two pairs of above the other near the top and bottom of the parallel rollers extending horizontally from one tank respectively. The endless carrier band I2 side of the treatment chamber to the other with is wound helically, from one side of the tank, the co-operating elements of each pair located re around the top roller l4 and bottom roller l3 of spectively near the'top and bottom of the treat the front pair, thus proceeding to the opposite ment chamber, and an endless band or the like side of the tank where the band is taken around which is wound helically between the top and the bottom roller R5 of the back pair and is then bottom rollers of one pair thus proceeding from wound helically in the reverse direction around one side of the chamber to the other and which ‘ the rollers l5, it of the back pair, thus proceed is thereafter wound helically in the return direc-' ing to- the original side of the tank where the tion around the top. and bottom rollers of the band is taken over the top roller it of the front other pair. If desired, the apparatus may include pair. The top rollers Ill, N5 of the front and back a plurality of sets of rollers and an endless band 40 pairs carry gear wheels l1, 18 .(Figure 4) with which is wound in oppositely directed parallel which a driving pinion I9 is in mesh. The pinion helical paths over the rollers of each set in suc i9 is adapted to be rotated selectively either by a cession. hand crank 20 coupled directly to a spindle on Another feature of the invention relates to the which the pinion is mounted or through any suit provision of a tensioning device through the in able reduction gearing, indicated generally at 2|, termediary of which the leading end of the ?lm from a small electric motor 22. The bottom rol is adapted to be coupled to the endless carrier lers l3,~ l5 of the two pairs are in the form of band and by means of which slack in the ?lm idlers which are driven by frictional contact with which would otherwise occur during the winding the endless band l2. On uni-directional rota-_ on operation is avoided. tion of the two top rollers Ill, l6 transmitted by The foregoing and additional features of the the driving pinion l9, it will be appreciated that invention are embodied in an apparatus which the endless band 12 will be traversed in a‘ ?at will now be described by way of example, with elongated helical path round the front rollers l3, reference to the accompanying drawings in l4 from one side of the tank to the other and which' then in a similar path round the back rollers l5, 2,405,645 I 3 I! in the reverse direction across the tank. The direction of travel of the endless band over the rollers is indicated by arrowheads in Figure 4. The top and bottom rollers of both pairs are pro vided with annular guide ?anges 23 adapted to separate adjacent .turns of the band. Alterna tively for the same purpose guides might be pro vided on the ?xed framework it which supports and the ?lm would result in the latter slackening of! near its attachment to the collar. The e?ect of the tensioning device 30, by means of which the ?lm is secured indirectly to the collar, is to take up the slack of the ?lm as the winding pro ceeds. - The apparatus is operated in the following way. The ?lm spool 50 is ?rst mounted on its support ing shaft 24 which is uncovered by a .hinged lid the rollers. . The roll of the ?lm 50 to be treated, which may 10 31 (mounted in the top panel 26 of the frame work)‘ which in the closed position, shown in be on a spool, magazine or other container nor Figure 1, forms a light-tight enclosure for the mally used in cameras, is mounted on or is held ?lm so that the apparatus may be used for day against the end of a shaft 24 located above and light loading. The leading end 21 of the ?lm is between the top rollers I4, 16. The shaft 24 is mounted on a bracket 25 supported on a top 15 attached, in the manner already described, to the band as it passes from the back top roller IE to panel 28 of the framework. The shaft 2d engag the front top roller 14. The hinged lid 3| on the ,ing with the spool holding the ?lm renders a top panel is then closed thus sealing the light braking action on the ?lm as later described trap. The hand crank 29 is then rotated or the herein. The leading end 21 of the ?lm is taken motor 22 set in motion until the ?lm is fully through a light-trapped opening 28 in the top wound on to the band.‘ In order to indicate when panel 25, the position of the ?lm being such that the ?lm has been fully wound on, the leading it may readily be connected to the endless band collar 29 may carry a projection arranged to op i2 as it passes from the top roller iii of the back erate a bell to give an audible warning. Alter pair to the top roller M of the front pair. The natively, this projection may be arranged to raise ?lm is attached to the band by means of a collar a rod operating through the top panel 26, thus 29 which is slidable on the band and is provided giving a visual signal that the winding-on process with a stop [2a so that the collar 29 if moved in has been completed. Again, the arrangement one direction becomes ?xed against the stop but may be such that the collar projection closes an is free to move in the opposite direction. Alter electrical contact so as to illuminate a lamp. natively the band may be provided with a catch After the ?lm has been fully wound on, as in so arranged that when the collar is pulled in one dicated by the foregoing signal, the trailing end direction, i. e.-in a direction opposed to that in of the ?lm is attached to the band collar 29; thus which the band is travelling, the collar will grip the band is covered by the ?lm with the tension the band, e. g. it may be arranged to engage holes or corrugations in the band. The leading end 2'! 35 ing device 30 between the two ends of the ?lm. The desired processing operations may now be ef of the ?lm is attached to the collar29 through fected, the top rollers I13, 46 either being driven the intermediary of a spring tensioning device 30, by the hand crank 20 or by the motor 22. The which may conveniently be a length of elastic tank i0 is provided at the top with a light-trapped material. One end of the tensioning device 301s attached to the collar 29 and the other end is 40 inlet 32 for the treating solution and at the bot tom with a cap-closed outlet or tap 33 through either attached direct to the leading end of the which the solution may be removed. Another ?lm or to a second collar (not shown) which is inlet 5i may be provided in the top panel 26 or slidable in either direction on the band and to alternatively the panel inlet 5i may replace the which the leading end of the ?lm is secured. As tank inlet 32. It is only necessary to use a com shown in Figure 6 the tensioning device 30 is pro paratively small quantity of the solution at the vided at each end with a set of small hooks 30C bottom of the tank, since in operation the ?lm is to engage with the perforations in the ?lm so that continuously traversed under the bottom rollers the ends of the ?lm can be easily attached to the I3, l5 of the two pairs on which the carrier band ends of the tensioning device 30. The device 30 may conveniently be composed, of an elastic part 50 is mounted. After processing, one end of the ?lm is secured to the ?lm roll mounting shaft 24, or 30A and a part 30B attached to the collar 29, to a spool mounted thereon, and the ?lm is re parts 30A and 303 being connected together by wound by rotation of the shaft 24 which, through means of a. hook 39D attached to the part 30A the medium of a pinion 53 carried by the shaft, is and adapted to engage in a loop 29D ?xed to the part 30B. in CA ‘ arranged for rotation by the hand crank 01' motor drive. The pinion 53 can be taken out of mesh The shaft 24 on which the roll of ?lm is with the driving pinion l9 when not required. mounted is provided with a spring brake (not In the arrangment diagrammatically illus shown) or like retarding device. When the top trated in Figure 5, the same principle of operation rollers l4, l6 are ?rst set in motion this spring brake has the effect of ensuring that the tension 60 is entailed but an increased number of band oarrying rollers are employed. The apparatus ing device 30 will be extended to the maximum comprises four pairs of rollers 40 to 4'! arranged extent, after which the brake will slip and the side by side in parallel pairs with the elements of ?lm will be fed automatically to the top of the each pair positioned one vertically above the other band. The length or strength of the tensioning device 30 is such that there is still a slight ten 65 near the top and bottom of the tank respectively. sioning applied by it to the ?lm when the latte ' The endless band I 2 is wound helically round the top and bottom rollers 40, 4| of the ?rst pair, has been fully wound on to the band. then helically in the reverse direction round the It is to be appreciated that after a few turns rollers 42, 43 of the second pair and so on round of ?lm have been wound on, the ?lm is driven by the top and bottom rollers 44, 45 of the third pair frictional contact with the outer surface of the .and top and bottom rollers 46, 4'! of the fourth band 12 and owing to the different diameters in pair, being carried from the top roller 46 of the volved the tendency is for the ?lm to move faster than the band. If the leading end 27 of the ?lm last pair, over the top of the rollers, to the start ing point of the ?rst pair. The top rollers 42, 44 were connected directly to the securing collar 29, the slight difference in speed between the band 75 of the second and third pairs are directly driven 2,4053% by a main driving pinion l9, and the top-rollers 6 I ranged to be traversed in succession in two op 40, 48 of the ?rst and fourth pairs are driven positely directed helical paths, 'a tensioning de through intermediate gear wheels 48. vice coupled at one end to the endless carrier and The apparatus described above may be modi ?ed in many ways without departing from the coupled at its other end to the ?lm and by means of which slack in the ?lm, during the winding-on operation, is avoided. 2. Apparatus for processing photographic ?lms in comparatively long lengths comprising a treat ment chamber, means including an endless band essential features of the invention. For example, it will be appreciated that the size of the tank, the length of the endless carrier band and the number and length of'the band» rollers may be varied in order to accommodate the apparatus to the processing of ?lms of di?erent lengths. For comparatively short length ?lms such as those customarily used in so-called f‘miniature” for traversing a ?lm in extended form through the treatment chamber, a coupling member for . attaching a ?lm to the band, a tensioning device in the form of a length of elastic material at tached to said coupling member, and 'means for cameras, there may be but two convolutions of the endless 'band on each pair of rollers. 1.5 attaching opposite ends of the ?lm to opposite ends of said tensioning device. I claim: ' , > 1. Apparatus for processing photographic ?lms in comparatively long lengths comprising a treat-. ment chamber, means for traversing a ?lm in 3. Apparatus according to claim 2 wherein said coupling member is free to move along the said bandv in the forward direction of movement extendedform through the treatment chamber, 20 thereof. said means comprising an endless carrier ar-, ROBERT JOHN DUGUID. .