Патент USA US2112606код для вставки
March 29, 1938. E. PLESS ‘ 2,112,606 FILM DEVELOPMENT SPOOL Filed June 13, 1956 ‘Ill.- llli INVENTOR. artist APLeas' ‘ - ATTORNEY. Patented Mar. 29, 1938 2,112,606 ‘ UNITED STATES PATENT. ' OFFICE _~ FILM DEVELOPMENT SPOOL Ernst Pleas, Mauer, near Vienna, Austria, as signor of one-half to Hermann Dannowski, Jackson Heights, N._ Y. - Application June 13, 1936, Serial No. 85,010 In Austria June 13, 1935 , .2 Claims. icl. 242-104) Figure 5 shows the two parts mounted ready This invention relates to devices for developing ‘for insertion and winding of the ?lm. photographic ?lms commonly known as develop ing tanks. In the use of such devices,‘ the ?lm after- exposure in a camera is spirally wound upon a support such as a spool with the-adjacent Figure 6 illustrates a modi?cation of a spool according to the invention. ' Similar reference numerals ‘identify similar 5 spiral windings properly spaced from each other. ‘ elements in the dilferent views of the drawing. Referring to Figures 1 and ,3,‘ these illustrate and the developing solution poured into the tank. the lower part A of the spool comprising a disc The developing process may be carried out in a or ?ange I having a spiral guide 9 preferably dark room or daylight. In the latter case, the formed integral therewith by a thin spiral shaped 10 tank is closed by a light tight cover. After a wall at right angles to the disc surface for'inser tion and guiding of the film through the ingress speci?ed developing time dependent on the de veloper used, the temperature, etc., the solution opening 2. The disc I has a central tubular ex is poured out and the ?lm ?xed and rinsed in the tension 3 provided with a longitudinal guide groove I, the purpose of which will be described 15 commonly known manner. ‘ The present invention is speci?cally concerned later. The tube 3 is provided with a plurality of ' with a spool for holding the ?lm to be developed circular _ ‘grooves 5 suitably spaced from each other conforming to different widths of standard and has for one of its objects to provide-a de ' v veloping spool adapted to accommodate different ?lm sizes. The upper part B of the spool as shown in Fig-' sizes of ?lms available on the market to avoidthe necessity of using a different developing device ‘ pres 2 and 4 comprises a disc I1 I provided with a for each particular ?lm sire. Another; object is spiral guide 9' and an ingress opening 2' sub to facilitate the insertion and winding of the film} stantially similar'as in the case of part A. The into a developing spool and to prevent jamming disc I’ has a central extension or sleeve ‘I having and other drawbacks experienced‘ with similar an inner diameter adapted to ?t snugly over the 25 devices known in the art. Another object is to central tube 3 of part A as shown in Figure 5. The spool is then placed in a receptacle or tank '10 _ " 20 ‘ 25 The sleeve 1 is provided with a plurality of lon provide a means to insure free access of the de veloper to all portions of the sensitive surface " gitudinal slots 6 to secure a certain degree of resiliency and ensure frictional engagement with especially to.the' edges of the ?lm to secure uni the tube 3 of part A. In order to secure the prop- '10 30‘ formly developed negative. ' With the ab0ve_objects in view, the ?lm holding device or developing spool described by this in vention comprises substantially two disc shaped ‘parts or ?anges mounted upon and spaced by a central‘ member. The discs are formed with spiral guides parallel to'each-other for guiding the ?lm during the winding operation and main taining adjacent windings properly spaced dur _ ing thedeveloping process. In order to accom 40 modate different ?lm sizes, the distance ~between the discs is made adjustable to conform to the standard widths of ?lm available on the market. er alignment of the spiral guides 9 and 9' of parts A and B and prevent’ relative rotation thereof, the sleeve 1 is further provided with a longitudi nal guide I projecting from its inner surface and adapted to engage the groove 0 of the center tube 35 3 of part A. ~ In order to facilitate the insertion of the edge of the film into the spiral guide, the ingress open ings 2 and 2' to the ?lm guides are formed with edges tapering ‘gradually from the outer surface 40 of the discs towards the inner surface thereof and terminating in the spiral guides as shown in the Another feature consists in the construction of _ drawing. In this manner. the ?lm may be in the ingress openingfrom the periphery of the serted into the spiral guide even in‘ complete\ gs0r discs to the spiral guide to enable an easy inser darkness by merely pushing it into the openings 45__ tion and winding of the ?lm even in full dark 2 and 2' until it has been completely wound in ness- without clogging or jamming. . side the spool. > These and further objects of the invention will become more apparent by the followingdetailed description taken with reference to the accom panying drawing in which 7 Figures 1 and 3 are a top and side view, respec ' tively, of one part of the developing spool. Figures 2 and 4 are a top and side view, respec tively, of the other of the developingspool. ' _ ' In order to lock part B or upper disc in the different positions corresponding to the particu lar widths of ?lm used, the,inner surface of sleeve 1 is furthermore formed with a circular projection or collar ll (see Figure 2) adapted to snap into and out of the grooves 5 of tube 3 when part B or lower disc is moved along the center tube 3 as ‘shown in Figure 5. 2,119,000 Insome cases it beeniound m =hialilitiilriivivpund therein,acentral cylindrical geousiitheentireedgeoitheiilmisindirectcon member extending from one oi said end members. a sleeve connected to the other member, said sleeve being adapted to slide over said cylindrical with thewalls of thespiral Iilid? land O’ member‘ and slotted lonsitudinally to irictionally 6." engage said cylindrical member, said cylindrical member being provided with a plurality of cir cular grooves spaced at predetermined distances. andacollarontheinnersuriaceoisaidsieeve tuberances ll projecting from the spiralguideslor l'servingtokeeptheedge the dim spaced from the guide 'adaptedtoengagesaidgroovesandlocksaidend free access oi the developer. In member-sin predetermined relative positions. 2. A developing spool comprising a pair at end members iormedwithspiral the developing solution to pass space between the spiral windings oi the thediscsland l'aresuitablyprovided openings or slots in a manner well known. 10 “ ~ adapt edtoholdaiilmwoundthereimoneoisaidend members having an axial cylindrical sleeve, a longitudinally slotted sleeve extending from the other end member and adapted to slidably and irictionally engage said iirst sleeve, whereby said . sleeves form a hub for said spool, one of said for illustration, and ‘that variations and modifi cations thereof are possible coming within the sleeves bdng formed with a plurality oi’ circular grooves spaced 'apart by predetermined distances, broader scope and spirit of the invention as de ,and a collar on the e surface 0! the other lined in the appended claims. Having thus described my invention what I sleeve being adapted to engage said grooves and claim as newand desire to secure‘by Letters Pat ent is: . > 1. A developing spool comprising a pair of end membershavingspiral -. ' ,posite'andparaileltoeachotherandadaptedto' lock said end members at predetermined axial distances, and a further longitudinal key and groove arrangement between said sleeves to pre vent relative rotary movement thereof.