US1809705A - Developing apparatus - Google Patents

Description

Junez9, 1931. w, H, JAEGER 1,89,705

DEVELOPING APPARATUS Filed Jan. 5. 1929 Patented June 9, 1931 UNITED STATES' iai'rlzla'rv OFFICE WILLIAM H. JAEGER, OF TRENTON', NEW JERSEY DEVELOPING .APPARATUS Application med January 5, 1929. Serial No. 336,665.

construction and inthe combination and ar` rangement of the several parts of my imn proved developing apparatus whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advanta eous for use, as will be hereinafter more 29 fu ly set forth.

The novel features of my invention will hereinafter be definitely claimed.

Tn order that m invention may be the better understood, lywill now proceed to describe the same with reference to the accomy panying drawings, wherein Figure l is a vertical longitudinal sectional View taken through an apparatus constructed in accordance with an embodiment of myinvention;

Figure 2 is a-sectional view takensubstantially on the line 2-2 of Fi ure l; Figure 3 is an enlarged ragmentary view illustrating one of the carrying rollers and the trackway associated therewith;

Figure 4 is a fragmentary view in top plan of the roller at the delivery end of the apparatus. 4

As herein disclosed, my improved apparatus comprises a tank T of requisite dimensions and which has its lower portion divided at aced points lengthwise thereof by the partltions l into the chambers 2, 3, 4, 5, 6, 7, 8 and 9. The chambers 3, 5, 7 and 9 are ada ted to contain water. f. l

T e chamber 2 is to contain a supply of developer the chamber 4 a sup lyl of bleach, the chamber 6 a supply of clear, and the chamber 8 a supply of redeveloper.

The developer solution preferably comprises the following admixture diluted to 160voz.: l

Oz. Hydroquinone 4 Sulphite of soda (anhy.) '8 yBoric acid (HaBos) l Bromide of pota-ssium 1/2 Caustic soda (sticks) 4 This developer solution is used full strength and at a temperature ranging from and F., the time of development being approximately forty-ve seconds.

The bleach comprises a solution diluted to oz. of

o Potassium bichromate 1.25 Sulphuric acid 2. 0

This solution is also used full strength at a temperature between 60 and 75 F.

The clear comprises an admixture of Sodium sulphite (anhy.) 1

This is used full strength at a temperature between 60 and 75 F.

Thev redeveloper comprises the following ingredients diluted to 160 oz.:

Oz. Hydroquinone 4 Sulphite of soda (anhy.) 8 Boric'acid 1 Bromide of potassium 1/2 Caustic soda 4 This redeveloper is to be used full strength ggd 1also at a temperature between 60 and The partitions 1 terminate a desired distance below the top of the tank T and support the parallel members 10 which provide mountings for the shafts 11 which are further supported by the side walls of the tank c The discs 12 of the rollers C associated with the chambers 3, 5, 7 and 9 are herein disclosed as of a diameter smaller than that of the discs 12 of the remaining rollers, but all of the discs are caused to rotate at the same peripheral speed by a worm drive connection' curved film guide 20 conforming to the adjacent portion of said disc 12 and which is arranged outwardly of the teeth 15. Interposed between adjacent longitudinally spaced discs 12 and bridging the space therebetween are theupwardly curved guide members 21 also carried by a member 10. With the various rollers C in operation a film to be treated is operatively engaged with the first roller C and the same will be carried through the upper portion of the developer chamber 2 and said film will be effectively maintained in requisite engagement with said roller by the associated guides 20, the position or location of such guides 20 leaving the intermediate or exposed portion of the film free of Contact. This is true in connection with all of the rollers, and as the film passes up- P wardly with one roller it is caused to have proper engagement with the adjacent roller of the intermediate guide members 21. When the film reaches the roller at the discharge end of the tank, the film is prevented i from passing around such roller by the guide fork 22 carried by each of the members 10 and having close contact with the periphery of a disc 12 at opposite sides of the teeth 15 thereof. l

My improved tank is especially adapted for use in connection with direct positive print paper and the speed of travel of the film through the tank is such to have the requisite development completed when the film is discharged therefrom.

It is believed to be obvious that the water within the chambers 3, 5, 7- and 9 serves to wash the film after each separate treatment incident to its development.

From the foregoing description it is thought to be obvious that a developing apparatus constructed in accordance with my without departing from the principles and V spirit thereof and for this reason I do not wish to be understood as limiting myself to 'the precise arrangement and formation of the several parts-herein shown in carrying out my invention in practice except4 as hereinafter claimed.

I claim 1. A tank for the development of direct positive rint paper divided into a plurality of chambers, each containing a liquid incident to the development of the paper, spaced discs rotatably supported above each of the chambers and extending downwardly thereinto, means for driving said discs at the same peripheral speeds, guides associated with the lower portions of the discs to maintain the paper in roper osition with respect to the discs, said discs aving outstanding teeth for engagement wit-h perforations in the paper, the guides being positioned outwardly o the teeth and engaging the marginal portions of said aper.

2. A tank for t e development of direct positive print paper divided into a plurality of chambers, each containing a liquid incident` to the development of the paper, spaced discs rotatably supported above each of the chambers and extending downwardly thereinto,

means for driving said discs at the same peripheral speeds, guides associated with the lower ortions of the discs to maintain the paper 1n properposition with respect to the discs, said discs having outstanding teeth for engagement -with lperforations in the aper, the guides being positioned outwardly of the teeth whereby to engage the mar inal portions of the paper, and guides bri ging the space between adjacent discs to cause the paper to properly pass from one disc to another.

3. A tank for the development of direct positive rint paper divided into a plurality' of cham ers, each containing a liquid incident to the development of the paper, spaced discs rotatably supported above each of the chambers and extending downwardly thereinto, means for drivin said discs at the same peripheral speeds, gui es associated with the lower portions of the discs to maintain the paper 1n proper position with respect to the discs, said discs havin outstanding teeth for engagement with per orations in the paper,- the guides being positioned outwardly of the teeth whereby to enga e the marginal portions of the aper, an a fork coacting with each of the iscs at the discharge end of the tank to prevent the film continuing around said disc, each of said forks straddling the .t th f h invention 1s particularly well adapted for use .ee o t e assoclated dlsc v. by reason of the convenience and facility with In testimony whereof I hereunto affix my signature.

WILLIAM H. JAEGER.

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