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Publication numberUS2419853 A
Publication typeGrant
Publication dateApr 29, 1947
Filing dateAug 31, 1944
Priority dateAug 31, 1944
Publication numberUS 2419853 A, US 2419853A, US-A-2419853, US2419853 A, US2419853A
InventorsPask Stanley J
Original AssigneeGrant Photo Products Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Photographic film developing apparatus
US 2419853 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Apr 29, W347i,


Fil Aug. 5l, 1944 April 29, 1947. s. n PAK PHTOGRAPHC FILM DEVELOPNG APPARATUS Filed Aug. 51, 1944 5 SheGS-She 4 April 29, 1947. J, PASK PHOTOGRAPHIC FILM DEVELOPING APPARATUS Filed Aug. 151, 1944 5 Shoetfs--SheefI 5 .ummm 9?@ @N INVENTOR. 'Sfmt/JPCLS HHOWI' Patented Apr. 29, 1947 PHOTGRAPHC FILM DEVELPNG APPARATUS Stanley J. Pask, Long Island City, N.. Y., assigner to Grant Photo Froducts, lne., New York, N.. Y., a corporation of Delaware Application August 31, 1944, Serial No. 552,081

7 Claims.

This invention relates to apparatus for dem veloplng latent image photographic exposures, with special reference to such as are made on strips of material, as, for example, moving picture films or direct positive paper.

The primary object of the invention is to provide an apparatus through which a lm or direct positive paper may be moved continuously for the purpose of development, the illm or paper passing in a straight line without danger of damage to the emulsion carried thereby.

Another object is in the economy of opera tion, the chemicals being re-used, avoiding waste. mixing or dilution.

A further object is in the provision oi a compact apparatus for this purpose, positive and entirely automatic in its action, adapted for long service, and requiring only a minimum amount of attendance.

These and other allied objects are attained by the novel and practical construction, combination and arrangement of parts hereinafter described and shown in the accompanying drawings, forming an important component of this disclosure, and in which:

Figure l is a side elevational view of a complete embodiment of the invention.

Figure 2 is an end View thereof.

Figure 3 is a partial side, partial longitudinal sectional view, showing the principal ele ments on an enlarged scale, also showing the removal of the casing on one end thereof.

Figure 4 is a transverse sectional view taken on line 4 4 of Figure 3, and further enlarged.

Figure 5 is a fragmentary sectional view taken on line 5-5 of Figure Figure 6 is a partial plan, partial longitudinal sectional view, taken substantially on line S-J of Figure 3.

Figure 7 is a fragmentary longitudinal sectional view, taken on line l-l of Figure 6.

Figure 8 is a horizontal section taken as on line 8-8 of Figure l, showing the relative position of the diaphragm pumps to the rest of the mechanism.

Figure 9 is a fragmentary section of the driv ing mechanism and associated parts, as on line 9--9 of Figure 3.

Figure l is a horizontal section as on line l0-l0 of Figure l, showing the driving mechanism and adjuncts.

Referring in detail to the drawings, the numeral I designates a platform or floor on which rest columns I6 supporting a rigid level angle Il extending the entire length of the apparatus.

A pail' of hollow upright rectangular frames i8 and i9, carried by the upper member of the angle, support a closed, box-like chamber 20 on which is mounted an electric motor 2l, its shaft pulley driving a belt t2, trained over a large wheel 23 iixed on a spindle 24 journaled at its ends in the side Walls of the chamber adjacently over the inner frame i8.

As best shown in Figure l0, there is xed to the spindle 24 the half 25 of an expansible grooved pulley, the other hall 26 being keyed to the spindle and movable thereon by a clutch 2l on the end of a lever 28, pivoted ou a post 29, set vertically in the chamber, and adjustable by a screw 28' in the wall of the chamber 20, these pulleys being connected by a belt 2li.

The opposite end of the lever has a similar clutch 35i adapted to move the adjustable part 26 of a similar pulley 25' along a spindle 3l, rotatable in the outer part of the chamber 20, and having a drive gear 32 fixed upon it to transmit motion to a Worm Wheel 33 fast upon an upright shaft 34.

Secured midway of the length of the shaft 34 is a Worm 3l meshed with a worm, wheel 3B, se cured to a transverse spindle 39 (see Figure 9).

inwardly adjacent a clutch 4l is a spur gear 42 meshed with a mating gear 43. On the extreme end of the spindle 39 is a sprocket M driving an endless chain trained over a single sprocket 46 at the opposite end of the apparatus and communicating rotary motion to a series of pairs of sprockets along its reach, as iurther described.

All these sprockets are journaled on spindles mounted in a housing 4l extending the full length of the apparatus, open at the bottom and provided with a cover 48 resting partially on a thick plate 49 at the entering end of the housing tl.

Referring to Figure l of the drawings, the tape or film 50 will be seen as coiled upon a spool 5l, mounted in any convenient manner, to pass between guide rolls E2, past a camera 53 to shears 54, hand or mechanically operated; thence between guide rolls 55 to enter the beveled entrance 56 (sec Figures 6 and '7), leading to a narrow slot v5l through which the film passes to become engaged between a pair of soft faced feed rolls {S8-59, respectively upper and lower, their peripheries partially extending into recesses formed in the inner side oi the end plate i@ to enter the first compartment 60 of the housing ill.

This pair of rolls is mounted on spindles 6 L M, mounted in the side walls of the housing and connected by spur gears 63 at one end, and driven by the sprocket 46 and chain 55. All the several other pairs of rolls are of similar construction, mounted and driven in like manner.

The other end of the compartment 60 is formed partially by a partition 64, extending down from the cover 48 and shaped at its lower end 65 to closely conform to the upper of a second pair of rolls SS-B'L A lower partial partition 68 is in close proximity to the lower roll 6l and contains a transverse slot 8S into which is closely itted the raised side edge lll of a pan l l the opposite raised edge i2 of which is similarly engaged tightly in a corresponding slot 'i3 in the lower edge of the end plate 45.

The front and rear walls of the housing are held together by bolts 'l which pass through a xed blocl; "l5, intermediate 'the rolls 53 and dii, its under surface being just clear of the plane of lm travel.

The pan rests on the upper member of the angle and, together with others, supports the housing 41 and forms liquid-tight joints with the compartments through 'which the film passes.

Below the block l5 are plates 16 on the opposite side wall, attached thereto by screws '11, with which the marginal edges of the nlm may conteo during its advancement.

Spaced below the path of the film, substantially equally between the rolls 5S and 6l, is an inverted rectangular cup 18 having a plurality of perforations 19 in its main portion, and provided with down-reaching side walls 80 tightly fitted over the edges of a dispensing head 8|.

This head has a concave upper surface 82 and contains a threaded bore 33 to receive a tube Si?, turned at an angle and connected by a iiexible sleeve 85, with another bent tube 8E engaged with a pump 8l, here shown as of the diaphragm type, supported by a bracket 3?' on the upright member of the angle |71.

A circular chamber in the pump 81 is closed by a flexible diaphragm 88, clamped by a ring 58 at its margin, held by screws 90, and actuated by e. pad Si having a forked stem S2, pivoted to a lever 03, as at lill.

One end of the lever is pivoted on a pin 95 set in a bracket SE, forming a part of the pump casing, while the opposite free end is pivoted, at 9T, to the end of an arm 98, integral with a ring 99 mounted on an eccentric |00, fixed on a. shaft I0 l, supported in an appropriate bearing |0|' on the level angle ll',

Liquid is applied to the pump by a tube 02 suitable telescopically in another tube 03, its lower end having a perforation |04 and its extremity being raised above the bottom of a tanl: |05, resting on the platform l5, thus preventing sediment from the tani; from entering the pump.

On one side of the housing 4l is attached a casing |08, covering the several gear trains and adapted to return any liquid that may enter, through an opening in the housing wall to the pan 'l A similar casing 08, on the opposite side, covering the sprockets and chain, performs a like function by delivering any liquids through an opening |09 to the same pan.

Set in the bottom of the pan 'll is a tube llt telescopically engaging in another tube lll leading to the corresponding tank 05, thereby draining the pan, preventing loss of the liquid and returning all excess of liquid dispensed by the head SS.

In case plain water is used i'or washing purposes, it will be discharged, preferably through a. bent tube |12, leading to a waste line ||3 de- 4 livering outwardly of th'c apparatus. Drainage of any liquid that may occur above the iilm is accomplished by pairs of vents ||4 formed in the side walls of the housing 4l, as seen in Figures 3, 4, 6 and 7, and delivering to the pan 1|.

The pump shaft lill is driven by a bevel gear HE meshed with a mating gear ||6 fixed on a transverse shaft ||1, passing through the angle l1 and having secured to it a grooved pulley ||8 over which is trained a V-belt ||9 driven by a pulley E20 fast on the spindle 24.

Another pulley on the shaft lll drives a rearwardly extending belt I2| trained over a pulley |22 fixed on the upper spindle |23 of a gear prunp |24 of known design. This pump is fed from any Convenient source of supply through a pipe |25, its educt directed through a curved tube |26 to a header |21.

This header |'2' is shown as being composed of a plurality of sections, diminishing in diameter to the end, in which is set a plug |28; each section is provided with a delivery tube |29 to discharge individually into its corresponding washing compartment |30, arranged intermediate the several chemical compartments *60, 20a, 00o, and after the last compartment 60o, the washing compartments being denoted as |30, |30a, |3017 and |300.

In operation, as the film 50 passes through the first compartment 60 with its emulslfied surface on its lower side, it is drenched by a developing solution, forced by the pump 81 through the perforated head 18 from the tank |05.

The film continues through the first, relatively narrower, washing compartment |30, where it is subjected to a torrent of pure water, delivered from any source, as by the pump |24, thoroughly removing all trace of the chemicals; thereafter the lm passes through the second compartment a, where it is treated to a bleaching solution, excess of which is completely removed by continuing through the adjacent washing compartment |300;

'The third compartment 6023 is for a iixing chemical, excess of which is removed by iiooding in compartment |3022; the iilm continues through a stabilizing solution in compartment 50c, and thence through the final rinsing compartment e, Where all traces oi' the chemicals are removed, the film issuing in finished condition, ready for drying.

t is noted that only the emulsion side of the film is subjected to treatament by the chemicals and washing, that no possible abrasion can occur, that no bending takes place, and that the process is entirely automatic and continuous.

It will further be noted that because of the contour of partitions 6l and 68, and the presence of two pairs of rolls in each compartment, it is :1ct possible for a liquid in one compartment, whether chemical or water, to be carried to the .neXt.

Having thus fully described the invention, what il; claimed as new and desired to be secured by lletters Patent of the United States is:

l. A lm developing apparatus having a stand, series of tanks in the base thereof, each tank containing a dlrlerent developing solution, means for continuously advancing a IElim in a straight path. the nlm being flat and its face directed downwardly, an elongated receptacle for each solution having perforations in its cover directly below the film, tubular connections between each tank and its corresponding receptacle, a pump in each connection, a guard over the film at the passage over the receptacle, means to collect and y?? Qt;

:wiping mma f may if e Wijs 10? z, am

on Peiow said Incas is adjacent she ruf'f be,

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2461419 *Jul 24, 1947Feb 8, 1949Forgett Valmore JApparatus for developing photographic paper strip
US2553014 *Jan 6, 1947May 15, 1951Internat Mutoscope CorpPhotographic strip developing apparatus
US2587350 *Jul 25, 1950Feb 26, 1952Kenyon Instr Company IncRapid processing apparatus for photographic film
US2674167 *Sep 18, 1950Apr 6, 1954Edwards Charles NApparatus for homogeneous spraying film
US2719789 *Jun 30, 1951Oct 4, 1955Polaroid CorpPhotographic apparatus and product
US2778734 *Nov 3, 1951Jan 22, 1957Polaroid CorpPhotographic apparatus and photographic product usable therewith
US2826979 *Jan 20, 1954Mar 18, 1958Emery DutchPhotographic developing apparatus
US2848931 *Jul 26, 1955Aug 26, 1958Troidl Robert AFilm developing apparatus
US2889762 *Feb 4, 1954Jun 9, 1959Photostat CorpPhotographic developing apparatus
US3060829 *Jun 18, 1958Oct 30, 1962Hycon Mfg CompanyRapid film processor
US3192846 *Aug 22, 1961Jul 6, 1965Itek CorpData processing apparatus
US4023190 *Jun 2, 1975May 10, 1977Sybron CorporationFilm processor
US4081816 *Dec 5, 1974Mar 28, 1978Agfa-Gevaert, A.G.Apparatus for processing photographic film and treating contaminated processing liquids
US4128424 *Sep 22, 1977Dec 5, 1978Agfa-Gevaert AgMethod for treating photographic processing fluids prior to sewering thereof
US4160594 *Sep 22, 1977Jul 10, 1979Agfa-Gevaert, A.G.Method and arrangement for the development of latent images particularly latent photographic images
US5355190 *May 3, 1993Oct 11, 1994Eastman Kodak CompanySlot impingement for an automatic tray processor
US5398094 *Mar 10, 1994Mar 14, 1995Eastman Kodak CompanySlot impingement for an automatic tray processor
US5420658 *May 3, 1993May 30, 1995Eastman Kodak CompanyModular processing channel for an automatic tray processor
US5420659 *Mar 10, 1994May 30, 1995Eastman Kodak CompanyModular processing channel for an automatic tray processor
EP0091509A2 *Oct 22, 1982Oct 19, 1983Staude Foto Chemie Eva StaudeDevice for developing microfilm
EP0091509A3 *Oct 22, 1982Nov 27, 1985Staude, EvaDevice for developing microfilm
U.S. Classification396/609, 396/627, 396/612, 134/64.00R
International ClassificationG03D5/04, G03D3/06, G03D5/00
Cooperative ClassificationG03D5/04, G03D3/06
European ClassificationG03D3/06, G03D5/04