US3187659A - Drum processing device - Google Patents

Drum processing device Download PDF

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Publication number
US3187659A
US3187659A US366692A US36669264A US3187659A US 3187659 A US3187659 A US 3187659A US 366692 A US366692 A US 366692A US 36669264 A US36669264 A US 36669264A US 3187659 A US3187659 A US 3187659A
Authority
US
United States
Prior art keywords
drum
liquid
blanket
processing
sheet
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.)
Expired - Lifetime
Application number
US366692A
Other languages
English (en)
Inventor
Charles O Edens
Albert H Schick
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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
Priority to BE663623D priority Critical patent/BE663623A/xx
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US366692A priority patent/US3187659A/en
Priority to DE19651497456 priority patent/DE1497456A1/de
Priority to GB19620/65A priority patent/GB1064914A/en
Application granted granted Critical
Publication of US3187659A publication Critical patent/US3187659A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/06—Applicator pads, rollers or strips

Definitions

  • This invention relates generally to photographic processing, and more specifically to a drum processing apparatus and method for processing sheets of photographic material.
  • One of the primary objects of the present invention is to provide an improved drum processor and method for processing photographic sheet material.
  • Another object of the invention is to provide a method for processing sheets of photographic material in which a sheet is releasably held to a fixed member by surface tension and friction therebetween, and the held sheet is moved into engagement with a rotating drum having a layer of processing solution on its periphery.
  • Another object of the present invention is to provide an improved drum processor having improved means for holding a photographic material in a stationary position in engagement with a film of processing solution on the periphery of a rotatable drum.
  • Another object of this invention is the provision of an improved processing device having a moving surface for receiving and transporting a film of processing solution, and means for holding a photographic materal in a stationary position in engagement with the film of solution.
  • a more specific object of the present invention is to provide an improved drum processor having a flexible blanket to which a photographic material adheres by surface tension and friction therebetween for holding the photographic material in a stationary position in engage ment with a film of processing solution on the periphery of a rotatable drum.
  • Another object of the invention is to provide an improved processing device of simple design and construction, thoroughly reliable and efiicient in operation, and economical to manufacture.
  • FIG. 1 is a front elevation view with portions thereof broken away of a processing device in which the invention is embodied;
  • FIG. 2 is a section view taken along line 2-2 of MG. 1;
  • FIG. 3 is a top plan view of the processing device of FIG. 1;
  • FIG. 4 is an enlarged front elevation view showing one of the latch means for the flexible blanket
  • FIG. 5 is an end view of the latch means of FIG. 4.
  • FIG. 6 is a top plan view of the blanket.
  • a processing device 19 comprising a main support housing 11 having spaced apart, parallel side frames 12, 13 (see FIGS. 1 and 3).
  • a pair of spacedapart, nylon rollers 1d are rotatably mounted on the upper edge of side frame 32, and a semicylindrical bearing l5 fixably secured to the upper edge of side frame 13.
  • a cylindrical drum 16 is rigidly secured by circular end plates 17 to a hollow shaft 18, and one end of the shaft is supported by the nylon rollers 14.
  • the opposite end of shaft 18 has a portion 19 of reduced diameter nesting in bearing 5, rotatably supported therein by means of a semi-cylindrical bearing cap it.
  • the drive means for the rotatable drum 16 is enclosed in a vented drive housing 22 secured to side plate 13.
  • the drive means (see FIG. 3) comprises a motor 23 drivingly connected to a variable speed reducer 24.
  • a pinion 25 is secured to the output shaft of speed reducer 24, and drives a gear 26 secured to portion 1% of drum shaft 13. With this arrangement, it is possible to drive the rotatable drum 16 at any desired revolutions per minute.
  • Means may be provided, not shown, for regulating the output speed of the speed reducer 24 and hence the speed of the rotatable drum 16 as may be required for the processing of different types of photographic print material.
  • a tempering device as best seen in FIGS. 1 and 3 for maintaining the temperature of drum 16 at a predetermined value comprises a water sump or reservoir 27 secured to side frame 12. Water from a supply line 23 is introduced into reservoir 27, and may be maintained at a predetmined level therein by means of any commercial float-valve device, not shown.
  • a water pump 2% of any suitable type is mounted in reservoir 27, and a flexible tubing 31 interconnects the outlet of pump 29 to a conduit 32 mounted in hollow shaft 18. The water pumped through conduit 13 passes through perforations 33 in the periphery of the hollow shaft 18 and into the hollow drum in which fills up until it is almost half full of tempering water.
  • thermostat 35 is mounted in the path of the water returning from drum 1e and is connected to a temperature gauge 36 for registering the temperature of the water leaving the drum. Any suitable heater, not shown, may be electrically connected to thermostat 35 for regulating the temperature of the water to any desired value as is well known in the art.
  • a rectangularly shaped processing tray 37 has a rod 38 secured to the underside thereof, the end portions 39 of which are journaled in the side frame 12, 13 of housing 11.
  • the tray $7 is pivotally mounted about the end portions 3?, and is movable between an operative position as seen in full lines in FIG. 2 in which tray 37 bears against a stop 49 and drum 16 is partially immersed in the processing solution, and in an inoperative position as seen dotted in FIG. 2 in which tray 37 bears against stop 4% for discarding the solution from tray 3'7.
  • Any suitable detent means may be provided for releasably holding tray 37 in its operative or inoperative positions.
  • tray 37 has a peripheral lip 41 and an inclined floor surface 4-2 to form an enlarged spout into which a processing solution may be introduced by a beaker or the like.
  • the introduced solution flows by gravity from the spout into a solution receptacle 43 of tray 37 which is contoured to match the surface of drum 16 as seen in FIG. 2.
  • the tray 37 in its operative position provides only a very small clearance between drum l6 and receptacle 43 thereby requiring only a minimum amount of solution to wet the drum.
  • drum 16 having a smooth periphery may give satisfactory results
  • the periphery of drum 16 is provided with a roughened or textured surface to aid in the pick-up of solution from receptacle &3, to provide a high degree of agitation, and to maintain a layer of solution between the drum and a sheet of photographic material so that the only force tending to move the sheet away from a support holding the sheet on the drum is the viscous drag of the solution, which is very low.
  • Constructing drum 16 from sheet metal having different sized diamond shaped bumps thereon, or spaced apart, parallel, longitudinally extending ribs has given good results.
  • a smooth drum 16 having spaced apart, parallel, longitudinally extending ribs constructed of Teflon secured thereto has been found to work well.
  • the photographic material holding means comprises a rectangularly shaped blanket 44 made of a flexible material such as polyethylene, rubberized fabric, neoprene coated nylon cloth, nylon netting, or the like, as best seen in FIG. 6.
  • the blanket M is provided with perforations 45 to enable washing off the back surface of the photographic material during the processing cycle.
  • One end of blanket 44 may be secured to a bar 46, the Weight of which may be sufiicient to hold the blanket in a stationary position against the rotation of drum 16.
  • Hook-shaped latch elements 47 may be secured to the upper edge of each side frame l2, l3, and the ends of bar 46 may be inserted therein as seen in FIGS. 2, 4, and for positively holding blanket 44 in a stationary position.
  • the blanket or material is wetted and the back surface of the material placed in contact with blanket 4d.
  • the photographic material adheres to blanket 44 by the surface tension and frictional force therebetween, and the blanket is then placed over drum 16 as it is rotating with the emulsion of the photographic material in contact with the film of processing solution on the periphery of the rotatable drum.
  • either an exposed sheet of photographic material or blanket 44 is preferably submerged in water to wet it completely, and the sheet is then centered on blanket M with its back surface in contact with the blanket and with its emulsion surface facing out. Wetting the sheet causes the sheet to become limp and to conform to the surface of the blanket, making the sheet more manageable to handle and to adhere to the blanket by virtue of the friction and surface tension therebetween.
  • the developer solution is poured into tray receptacle 4-3 and distributed evenly over its entire length.
  • the blanket 44 with the photographic material adhering thereto is placed on the drum 16 after it has started to rotate and becomes wetted with processing solution, and the ends of bar &6 are inserted into latch elements 47 to hold the blanket in a fixed position on the drum surface.
  • the layer of processing solution on drum l6 prevents the development of surface tension between the sheet and drum so that the only force tending to move the sheet away from the support or blanket 44 is the viscous drag of the solution which is very low. Since the blanket to which the sheet of photographic material has been adhered is not wound down onto the drum until after it is rotating, the sheet will not be pulled off the blanket by the drum because the surface tension and friction between the blanket and sheet is greater than the viscous drag between the emulsion surface of the sheet and the moving drum surface.
  • the tray 37 is moved into its inoperative position to discharge the developer solution.
  • the wash water is then introduced, usually from an independent water source, into tray 37, and the tray is tipped into its inoperative position two or three times during the washing cycle to empty the contaminated Water therefrom and introduce new water.
  • the stop-fix solution is introduced into tray receptacle 43.
  • Wash water is once again introduced into the tray 37 for washing the stop-fix solution from the photographic material.
  • the same procedure is repeated for any additional photographic steps such as bleaching and buffering.
  • the number of steps to the method may be reduced.
  • a device for applying processing liquids to a surface to be processed of a photographic material comprising:
  • liquid supply means adapted to provide selected processing liquids, one at a time, for processing such surface of such photographic material
  • a device in accordance with claim 1 and wherein said material supporting means comprises a flexible member which conforms to said liquid carrying surface and which overlies said material to hold the same in contact with the liquid transported on the liquid carrying surface.
  • a device for applying processing liquid from a supply thereof to the surface to be processed of a photographic material comprising:
  • said material supporting means comprises a flexible member for sandwiching the material between the liquid on the liquid carrying surface and the member, said member being releasably fixed on one end relative to the device and overlying the drum in such a way that the force of gravity acting on the member conforms the member to the liquid carrying surface and holds the material in contact with the liquid thereon.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Photographic Developing Apparatuses (AREA)
US366692A 1964-05-08 1964-05-08 Drum processing device Expired - Lifetime US3187659A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE663623D BE663623A (enrdf_load_stackoverflow) 1964-05-08
US366692A US3187659A (en) 1964-05-08 1964-05-08 Drum processing device
DE19651497456 DE1497456A1 (de) 1964-05-08 1965-05-07 Vorrichtung zum Entwickeln von photographischem Material
GB19620/65A GB1064914A (en) 1964-05-08 1965-05-10 Photographic processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US366692A US3187659A (en) 1964-05-08 1964-05-08 Drum processing device

Publications (1)

Publication Number Publication Date
US3187659A true US3187659A (en) 1965-06-08

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ID=23444092

Family Applications (1)

Application Number Title Priority Date Filing Date
US366692A Expired - Lifetime US3187659A (en) 1964-05-08 1964-05-08 Drum processing device

Country Status (4)

Country Link
US (1) US3187659A (enrdf_load_stackoverflow)
BE (1) BE663623A (enrdf_load_stackoverflow)
DE (1) DE1497456A1 (enrdf_load_stackoverflow)
GB (1) GB1064914A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266406A (en) * 1963-02-11 1966-08-16 Gevaert Photo Prod Nv Photographic copying apparatus stripping mechanism and method
US3435748A (en) * 1966-12-02 1969-04-01 Reynolds Metals Co Apparatus for developing a cylinder
US3872827A (en) * 1972-04-27 1975-03-25 Eastman Kodak Co Roller applicator
US5692188A (en) * 1996-01-11 1997-11-25 Watts; Todd A. System for processing and washing photographic images

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US920263A (en) * 1908-05-23 1909-05-04 Charles E Chrisman Film-developing machine.
US1057712A (en) * 1912-09-21 1913-04-01 Randolph Crompton Apparatus for developing photographs.
US1313197A (en) * 1919-08-12 Canada
US2587350A (en) * 1950-07-25 1952-02-26 Kenyon Instr Company Inc Rapid processing apparatus for photographic film
US2605684A (en) * 1947-10-06 1952-08-05 Grinten Chem L V D Apparatus for semiwet development of photoprints
US2984163A (en) * 1961-05-16 giaimo
US3093052A (en) * 1959-12-03 1963-06-11 Willard C Burner Photographic processing apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1313197A (en) * 1919-08-12 Canada
US2984163A (en) * 1961-05-16 giaimo
US920263A (en) * 1908-05-23 1909-05-04 Charles E Chrisman Film-developing machine.
US1057712A (en) * 1912-09-21 1913-04-01 Randolph Crompton Apparatus for developing photographs.
US2605684A (en) * 1947-10-06 1952-08-05 Grinten Chem L V D Apparatus for semiwet development of photoprints
US2587350A (en) * 1950-07-25 1952-02-26 Kenyon Instr Company Inc Rapid processing apparatus for photographic film
US3093052A (en) * 1959-12-03 1963-06-11 Willard C Burner Photographic processing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3266406A (en) * 1963-02-11 1966-08-16 Gevaert Photo Prod Nv Photographic copying apparatus stripping mechanism and method
US3435748A (en) * 1966-12-02 1969-04-01 Reynolds Metals Co Apparatus for developing a cylinder
US3872827A (en) * 1972-04-27 1975-03-25 Eastman Kodak Co Roller applicator
US5692188A (en) * 1996-01-11 1997-11-25 Watts; Todd A. System for processing and washing photographic images

Also Published As

Publication number Publication date
DE1497456A1 (de) 1969-08-07
GB1064914A (en) 1967-04-12
BE663623A (enrdf_load_stackoverflow)

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