US3698306A

US3698306A - Photographic processor

Info

Publication number: US3698306A
Application number: US151635A
Authority: US
Inventors: Henry N Fairbanks
Original assignee: Itek Corp
Current assignee: AB Dick Co
Priority date: 1971-06-10
Filing date: 1971-06-10
Publication date: 1972-10-17
Anticipated expiration: 1989-10-17
Also published as: GB1360928A; DE2228371A1

Abstract

A photographic processing unit in which an increased amount of processing time in one processing station of the unit is attained by recycling the photographic materials through that processing station. Recycling is achieved by providing a movable two position deflector at the exit of the processing station. The deflector is movable to a first position in which it deflects the photographic materials existing from that processing station back to the entrance for one or more further cycles through the processing station. After the photographic materials have been recycled a sufficient number of times to allow complete chemical treatment, the deflector is moved to a second position wherein it deflects the photographic materials to the next processing station of the unit wherein the same type of recycling may be utilized if so desired.

Description

[451 Oct. 17,1972

United States Patent Fairbanks [57] ABSTRACT A photographic processing unit in which an increased [54] PHOTOGRAPHIC PROCESSOR [72] Inventor: Henry N. Fairbanks, Rochester,

amount of processing time in one rocessin station of a n p g n [73] Assignee; ltek Corpurafion, Lexington Mass the unit is attained by recycling the photographic materials through that processing station. Recycling is [22] Flled: June 1971 achieved by providing a movable two position deflec- [211 App 5 35 tor at the exit of the processing station. The deflector is movable to a first position in which it deflects the photographic materials existing from that processing liil lifi'fiiiiiiiiiiiiiiiiii:11111357173???32533 273 station but to for or more further cycles through the processing station. After the photo- [58] Field of Search .........95/89 R, 89 A, 89 L, 94 R; 118/423-428 graphic materials have been recycled a sufficient number of times to allow complete chemical treatment, the deflector is moved to a second position [56] References Cited UNITED STATES PATENTS wherein it deflects the photographic materials to the next processing station of the unit wherein the same type of recycling may be utilized if so desired.

3,511,160 5/1970 Van Reusel................95/89 R 3,330,179 7/1967 Zerfahs et al................355/14 Primary Examiner-Samuel S. Matthews Assistant Examiner-Richard M. Sheer 9 Claims, 1 Drawing Figure Attorney-Homer 0. Blair, Robert L. Nathans and William C. Roch PATENTEDBBT 1 I 12 3.698.306

SOLENOID MOTOR I i 70 L 1 ATTORA/E).

BACKGROUND OF THE INVENTION The present invention relates generally to photographic processing equipment, and more particularly pertains to a simple, compact and inexpensive photographic processing unit for processing exposed photographic materials at an increased speed, and wherein the increase in processing speed is attained by reducing the travel time of photographic materials through the unit during which the materials are not actually being chemically processed.

In the field of photographic processing, simple and compact processing units have been built which utilize a slow rate of travel of photographic materials through the processing unit, typically one-half inch per second. If the processing unit were to process an exposed photographic plate, typically having a length of inches, at the rate of travel through the unit of one-half inch per second, it would take 30 seconds just to get the plate all the way into a chemical processing station of the unit. Actual chemical development typically might take seconds. Thus, more time is expended in travel time just getting the plate into and out of a chemical processing station than in the actual chemical treatment of the plate. It would be desirable to have a simple, compact and inexpensive processing unit which has a faster rate of travel of photographic materials through the processor to reduce the expended travel time during which the materials are not being chemically treated, while retaining the materials in the chemical processing stations for a sufficient amount of time to allow complete chemical treatment. It would also be desirable to have such a photographic processing unit which utilizes a constant rate of travel of photographic materials through the unit while not increasing the size of the unit by elongating a processing station of the unit or by increasing the number of processing stations in the unit.

SUMMARY OF THE INVENTION In accordance with a preferred embodiment, a simple, compact and inexpensive processing unit is disclosed wherein the rate of travel of photographic materials through the processing unit is increased to reduce the expended travel time during which the materials are not being chemically treated, while retaining the materials in the chemical processing stations of the unit for a sufficient amount of time to allow complete chemical treatment. Further, the preferred embodiment is economical and inherently simple as it utilizes a constant rate of travel of photographic materials through the unit which allows the drive motor to be a single speed motor.

The preferred embodiment increases the velocity of travel of photographic materials through the unit and retains the photographic materials in a processing station of the unit for a sufficient amount of time to allow complete chemical treatment by recycling the photographic materials through the processing station for one or more recycles. In one embodiment a movable, two position deflector is located at the exit of the processing station in which more processing time is desired. The deflector is movable to a first position in which it deflects the photographic materials exiting from that processing station back to the entrance for a further cycle through the processing station. After the photographic materials have been recycled a sufficient number of times to allow complete chemical treatment, the deflector is moved to a second position wherein it deflects the photographic materials to the next processing station of the unit wherein the same type of recycling may be utilized if so desired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional illustration of one embodiment of a deflector system which may be utilized to achieve recycling in a processing station.

DESCRIPTION OF A PREFERRED EMBODIMENT FIG. 1 illustrates a first processing station 10 and a second processing station 12 of a photographic processing unit. The first processing station 10 may contain developing solution, and the second processing station 12 may contain fixing solution. Exposed photographic materials to be processed enter the processor through a guide 12. The guide 12 deflects the materials to

entrance drive rollers

14 and 16 which are driven at a constant speed by constant speed motor 18. The entrance drive roller which normally contacts the emulsion side of the photographic materials, which could be either 14 or 16 depending on the design of the processor, should be slightly undercut at its central portions to avoid contacting the emulsion with spent of contaminated processing agents. The

drive rollers

14 and 16 direct the photographic materials into the first processing station 10 wherein partial chemical processing of the materials occurs. The materials are directed from the entrance drive rollers to the

exit drive rollers

20 and 22 by wire guides 19 in the processing station. Constant speed motor 18 also drives the

exit rollers

20 and 22. The spacing between the entrance and exit drive rollers is such that the photographic materials being processed are always being driven through the processing station by at least one set of drive rollers. The photographic materials are not completely chemically processed after one pass through the bath in processing section 10 because of the high rate of travel of the materials through the processing station. Recycling is attained by providing a movable steering means in the form of a two position movable deflector 24, shown in a first position wherein it deflects the photographic materials back to guide 26 which further directs the photographic materials back through

entrance rollers

14 and 16 for at least one further cycle through processing station 10. It should be noted that the photographic materials carry processing solution with them as they pass by

guides

24 and 26, and thus chemical processing continues to a degree even though the materials are not directly immersed in developing solution in processing station 10. If complete chemical processing has occurred after one recycle of the photographic materials, movable deflector 24 is moved to the position illustrated by dashed lines 25 wherein it directs the photographic materials to the next processing station 12 of the photographic processor. Deflector 24 is moved to its second position by arm 28 which rotates about shaft 32 under the direction of solenoid 30. In one embodiment solenoid 30 may be actuated by a master timer 34 for the photographic processing unit. In other embodiments a microswitch in the recycling path could be utilized to actuate solenoid 30 after recycling has occurred a predetermined number of times.

In the second and non-recycling position of deflector 24, illustrated in dashed lines at 25, the deflector directs photographic materials to guide 36 which then directs the materials to input rollers 14 and 16' of the second processing station 12, wherein the same type of recycling may be utilized if so desired.

A differing number of recycle times may be desired in the processing unit depending upon the type of photographic materials being processed and the type of processing agent being utilized in the processing unit, or under certain circumstances recycling might be selectively omitted.

Recycling may be especially desirable in the washing processing station of the unit when it is desired to produce photographic materials of archive quality.

While several embodiments have been described, the teachings of this invention will suggest many other embodiments to those skilled in the art.

I claim:

1. A relatively compact photographic processing station for performing a processing step on photographic materials at a relatively high speed and wherein the increase in processing speed is obtained by reducing the travel time during which the photographic materials are not actually being processed and comprising:

a. a container means for containing a fluid processing agent;

b. a photographic materials entrance means into said container means;

c. a guide means for guiding photographic materials from said entrance means through said container means while the materials are exposed for processing to the fluid processing agent;

d. a relatively high speed drive means for driving photographic materials from said entrance means through said guide means with the photographic materials being partially processed by the fluid processing agent during a first cycle through the processing station, whereby said relatively high speed drive means minimizes the time the photographic materials spend in the nonprocessing operations of entering into and exiting from the processing station; and

e. means for completing the processing of the photographic materials including means for selectively directing the photographic materials which have passed through said guide means back to said entrance means for one or more subsequent passages through said guide means to recycle the photographic materials through the processing station of the hoto ra hic rocessin station.

3. i ppara tus as et forth 1n claim 2 wherein said steering means includes a V shaped deflector, and said means for selectively positioning includes means for selectively positioning said V shaped deflector at said first and second positions.

4. Apparatus as set forth in claim 3 wherein said means for selectively directing includes a first fixed deflector means positioned adjacent to said V shaped deflector for further deflecting the photographic materials back to said entrance means after an initial deflection of the photographic materials by said V shaped deflector when positioned at its first position, and a second fixed deflector means, positioned adjacent to said V shaped deflector, for further deflecting the photographic materials out of the processing station after an initial deflection of the photographic materials by said V shaped deflector when positioned at its second position.

5. Apparatus as set forth in claim 4 and including a pair of exit rollers positioned at the exit end of said guide means, and wherein the point of the V of said V shaped deflector is movably positioned adjacent to said pair of exit rollers.

6. Apparatus as set forth in claim 5 wherein said entrance means includes a pair of entrance rollers, and said drive means includes a constant speed motor means for driving said entrance rollers and said exit rollers at a constant speed.

7. Apparatus as set forth in claim 6 wherein said photographic processing unit includes a master timer means for actuating said means for selectively positioning said V shaped deflector.

8. Apparatus as set forth in claim 1 wherein said entrance means includes a pair of entrance rollers, and the station includes a pair of exit rollers positioned at the exit end of said guide means, and said high speed drive means includes a constant speed motor for driving said entrance rollers and said exit rollers at a constant speed.

9. Apparatus as set forth in claim 8 wherein the station includes a master timer means for selectively activating said means for selectively directing.

Claims

1. A relatively compact photographic processing station for performing a processing step on photographic materials at a relatively high speed and wherein the increase in processing speed is obtained by reducing the travel time during which the photographic materials are not actually being processed and comprising: a. a container means for containing a fluid processing agent; b. a photographic materials entrance means into said container means; c. a guide means for guiding photographic materials from said entrance means through said container means while the materials are exposed for processing to the fluid processing agent; d. a relatively high speed drive means for driving photographic materials from said entrance means through said guide means with the photographic materials being partially processed by the fluid processing agent during a first cycle through the processing station, whereby said relatively high speed drive means minimizes the time the photographic materials spend in the nonprocessing operations of entering into and exiting from the processing station; and e. means for completing the processing of the photographic materials including means for selectively directing the photographic materials which have passed through said guide means back to said entrance means for one or more subsequent passages through said guide means to recycle the photographic materials through the processing station for one or more times to complete the processing of the photographic materials by the fluid processing agent.

2. Apparatus as set forth in claim 1 wherein said means for selectively directing includes a movable steering means, and means for selectively positioning said steering means at a first position for steering photographic materials which have passed through said guide means back to said entrance means, or at a second position for steering photographic materials out of the photographic processing station.

3. Apparatus as set forth in claim 2 wherein said steering means includes a V shaped deflector, and said means for selectively positioning includes means for selectively positioning said V shaped deflector at said first and second positions.