Abstract:
The combination of a light emitting diode array controlled to photograph an identifying code onto a film; and a printer controlled to print the same number on an associated envelope, container or label. The identifying code is automatically changed after each film strip, container set is printed so as to provide a new code for the next operational cycle.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates generally to photographic film identification systems, and more particularly to such systems which use an identifying code to correlate each film strip with an associated envelope or container. 
     In the film processing trade, the film rolls or cassettes are normally supplied to the processing dealer in containers, eg. envelopes, on which the information identifying the owner of the film is written. In the past, a control number is placed on the envelope or container and the same number is subsequently placed directly on the film when it is first processed in a darkroom. For example, U.S. Pat. No. 1,084,592 discloses an apparatus whereby a number is perforated into the flap of the film envelope and the perforated flap is placed on the glass portion of a printer so that the film processed in the printer will have this number photographed thereon. Similarly, U.S. Pat. No. 1,817,728 deals with a film numbering device in which the control number is photographed on the film from a number previously stamped on film envelopes; and U.S. Pat. No. 2,315,987 discloses a system whereby a stencil is used to photograph the number on the film. 
     The prior art approaches to film identification have usually required a considerable amount of manual activity with its inherent drawbacks in processing speed, economy and accuracy. 
     SUMMARY OF THE INVENTION 
     A primary object of the subject invention is to provide a film identification system which exhibits improved processing speed, economy and accuracy. 
     Another object of the invention is to provide an automatic identification system which is adapted for integration into existing film processing arrangements. 
     A more specific object of the invention is to provide an improved film identification system which automatically generates and applies a unique identifying code to each film strip and its associated container, envelope or label. 
     In accordance with one embodiment of the invention, a code programer, in conjunction with a keyboard unit, generates a film identification code, eg. a five digit number, and applies the code number to a light emitting diode (LED) array assembly and to a printer. The LED assembly is disposed along the processing path of the film strip and in response to a sensor which senses the lead segment, for example, of the film, the LED assembly is activated and the identification code is photographed onto a film. Concurrently with the photographing of the identification code on the film a remotely located printer is controlled so as to cause the identification code to be imprinted on control item, eg. an envelope or label, associated with the film strip. The identifying code is automatically changed after each operating cycle and the keyboard unit allows any desired code number to be programmed at the start of a series of processing cycles. For example, for a five part code marking, the first one or two programmed letters, symbols or numbers may identify the day of the week, the date the film was received for processing, the type of film or the retail outlet which sent the film to the processing laboratory or any other coding information. This marking is incremented each operating cycle so that the number portion increases by one for each of the film rolls. Hence, the processed and printed film may be correlated with the envelope in which the film roll or cassette was originally received, and which identifies the owner of the film. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The novel features of the invention are set forth with particularity in the appended claims; and the invention will be better understood from the following description when read in conjunction with the accompanying drawings in which like reference characters refer to like parts and in which: 
     FIG. 1 is a block diagram of one preferred embodiment of a photographic film identification system in accordance with the subject invention; 
     FIG. 2 is an expanded view of the portion of film 10 shown in FIG. 1 on which an identifying code has been exposed; and 
     FIG. 3 is a block diagram of a second embodiment of a photographic film identification system in accordance with the subject invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring first to FIG. 1, photographic film strip 10 is supplied through track throat 12, and gripper rollers 14 guide the film past a sensor 16. In response to the film being detected by sensor 16, a trim unit 18 trims the ends of the film. Numerous suitable devices for elements 16 and 18 are known in the art as is their coaction for film trimming. 
     Next, the film is advanced to sensor 20 which senses the &#34;lead&#34; frame thereof, for example, and in response thereto, provides an output signal on a lead 22. The output signal from sensor 20 is applied to a transport control unit 24 and in response to this signal, the transport control unit momentarily stops the advance of the film to allow time for a LED assembly 26 to photograph an identification code onto the film. 
     LED assembly 26 includes an array 28 of light emitting diodes arranged to illuminate a five digit number, for example, in accordance with signals applied thereto on a cable 30 from an output section 32 of a code programmer unit 34. Lens 25 is arranged relative to the light emitting diodes such that the light pattern emitted from the diodes is focused onto film 10. Cable 30 may include seven leads for each digit to be illuminated and for this configuration each digit comprises selected combinations of seven line segments in a manner well known in the electronic display art, (see FIG. 2); and each line segment is formed from about ten light emitting diodes, for example. In response to the signal from sensor 20, LED array 28 is enabled and exposes film 10 with the code number supplied from programmer 34 (See FIG. 2). 
     After a pause sufficient to allow for the just described photographic operation, transport control unit 24 advances the film through guide rollers 36 to a sensor 38 which senses the &#34;lead&#34; frame and supplies an output signal to transport control unit 24 and to splicing unit 40. In response to the output signal from sensor 38, transport control unit 24 momentarily stops the advance of film 10 and splicing unit 40 connects the lead end of film 10 with the tail end of a preceding film strip 11. Devices suitable for splicing unit 40 are well known in the art, such as for example, those produced by Standard Photo, Inc. of West Springfield, Mass. 
     Following the splicing operation, the film is advanced through guide rollers 42 and tension rollers 44 to a take-up reel 46. Take-up reel 46 is mechanically driven by transport control unit 24 in a manner well known in the art. 
     Keyboard unit 48 may be any suitable unit which generates signals indicative of the numbers or letters depressed on the keyboard. These signals are applied on a cable 50 to a memory section 52 of code programmer 34. In the illustrated embodiment, memory section 52 stores the signals programmed by means of the keyboard, and memory 32 is &#34;cleared&#34; in response to a signal produced by the depression of the letter &#34;C&#34; on the keyboard. 
     Output section 32 of code programmer 34 converts the data stored in memory 52 to the proper format for operating LED array 28 and a printer 54. For example, the data applied to LED array 28 may comprise seven parallel binary bits for each digit of the code number, with each bit controlling one of the seven line segments of each digit of the LED display (see FIG. 2). The data supplied to printer 54 may comprise four parallel binary bits for each bit of the code number; e.g. parallel binary bits 1, 0, 0, 1 would represent 1 + 0 + 0 + 8 = 9.  The printer head in unit 54 may comprise a Victor matrix printing mechanism manufactured by Victor Comptometer Corporation of Chicago, Ill. 
     In the operation of the system of FIG. 1, the processing path of film 10 is enclosed in a light-free enclosure (not shown), such as a dark room, and keyboard 48, code programmer 34 and printer 54 may be conveniently located outside of the enclosure. As each roll of film is loaded into throat 12 of the system shown in FIG. 1, the control item, eg. the envelope in which the film was received from the retail outlet, is inserted into a bin 56 of printer 54 so that the envelope for the first roll of film to be processed is at the front and the envelopes for rolls of film to be subsequently processed follow. For example, at the start of processing a group of films received, the code 21000 may be programmed, with the digits 21 indicating the twenty-first day of the month and the remaining digits indicating the first film to be processed on that date. 
     As the first film is fed into throat 12, it is trimmed by unit 18, and in response to signals supplied from sensor 20 the advance of the film is momentarily stopped and LED array 26 photographs the code number &#34;21000&#34; onto the lead frame thereof. Concurrently, the number &#34;21000&#34; is imprinted on the associated envelope as it is automatically processed through printer 54 from input bin 56 to output bin 58. After the first operational cycle, incrementing unit 33 of code programmer 34 adds &#34;1&#34; to the number previously held in memory 52 and stores this new number in the memory so that the second film and its associated envelope are imprinted with the number &#34;21001&#34;. 
     The embodiment of FIG. 3 is similar to that described herein above relative to FIG. 1 except that it is adapted for use with rack type film processing in which a plurality of films are disposed in a parallel arrangement on a rack. Unit 31 contains LED assembly 26&#39; and the end or edge of film 10 of each film roll is individually inserted opposite the LED assembly in order to photograph successive code number on the successive rolls. When the film is inserted, a position signal functionally similar to that provided by sensor 20 of FIG. 1 is provided and the operation for identifying the film strips and their associated envelopes is the same as described herein above relative to the embodiment of FIG. 1. 
     As an alternative means, instead of stopping the film, the film would progress continuously down the track 12. When the sensor 20 is actuated by the film being in a predetermined position, it sends a signal to the code programmer 34 and the programmer 34 enables LED array 28 to intermittently illuminate in such a manner as to reproduce on the film the desired control number. 
     In place of the LED assembly, it is understood that any other suitable light emitting means can be used to apply the code number to the film, such as a fiber optic dot array or other suitable illuminated displaying means, and the code number can be applied to the film with or without the use of light projecting means associated with the light emitting means depending upon the type of illuminating display utilized. It is also understood that while reference has been made to a five digit marking, the marking can be any number of digits and can include symbols and letters as well as numerals.