Abstract:
The present application discloses a system, method and device for placing substantially invisible marks comprising alphanumeric characters, symbols, or bar codes, on a page using clear ink or toner, which may then be read by a spectrophotometer. Such substantially invisible marks are not viewable to the unaided eye of a human observer, do not distract a viewer, and allow the viewer to focus their attention on the printed matter and text of interest to the viewer.

Description:
[0001]    This application claims the benefit of U.S. Provisional Application No. 61/056,606, filed May 28, 2008, the disclosure of which is incorporated herein in its entirety by reference. 
     
    
     BACKGROUND 
       [0002]    Visible labels can often be obtrusive and visually distracting to persons using a product. However labels are necessary to serve the important business function of conveying product related information to the product manufacturer and product seller. Such information is irrelevant and unimportant to the buyer and ultimate end user, who thus do not need to access such information. What is currently needed, but lacking in the present art is a labeling means that performs the information conveyance function for the manufacturer and seller, but is invisible to and unobtrusive to the buyer and end user. 
       BRIEF DESCRIPTION 
       [0003]    The present application relates to the area of invisible sensing, which conveys information to a manufacturer or seller using labels not visible to the human eye, but detectable by an electronic device. The graphic arts industry uses control marks and symbology to convey information between parties within the printing process. Control marks are markings that convey information such as a bar code or UPC code. Symbology is the use of symbols within cultural context to convey a message such as the handicapped symbol or the traditional barber&#39;s pole. Such marks as used in the graphic arts printing industry for automated inserts are black, obtrusive and generally undesirable to the aesthetic quality of the document. Customers generally do not like the black visible marks due to the fact that they are obtrusive and divert the attention away from the contents of the document. The present application discloses a new and novel means by which the marks may be affixed to the pages for use by the printer, and yet be invisible to the unaided eye. These marks can be read through use of an inline spectrophotometer. Use of clear toner allows the ability to sense invisible control marks at the beginning and end of the document. The present application may improve the customer satisfaction and also allow the ability to control the finishing system without printing unnecessary visible marks. The graphic arts industry has a current, unmet need for unobtrusive, invisible marks which would allow the customers to view the contents of the document without the needless distraction caused by visible marks. 
         [0004]    While paper is a common printing medium used in the present application, the present technology may also be readily used in conjunction with any medium including, but not limited to, paper products, cardboard, wood, metals, plastics, polymers, ceramics, glass, super cooled liquids, frozen liquids, and the like. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]      FIG. 1  is illustrates the paper, the paper accumulation unit, the spectrophotometer, and the integration with a computer and peripheral devices; 
           [0006]      FIG. 2  is an illustration that the marks may be located anywhere on the page and that a page may have multiple marks or no marks at all; 
           [0007]      FIG. 3  is an illustration of how inserts may be placed between marked pages; 
           [0008]      FIG. 4  is an illustration of how the forms may be folded and placed in envelopes; 
           [0009]      FIG. 5  is an illustration of the many types of marks that may be placed on the page in substantially invisible ink or clear toner; and. 
           [0010]      FIG. 6  is a flow chart illustrating the method claim. 
       
    
    
     DETAILED DESCRIPTION 
       [0011]    With reference to  FIG. 1 , one embodiment of the present application discloses a systems, method and apparatus  100  which reads a substantially invisible mark  140  from each of a plurality of stacked papers  120  as the papers are fed individually  122  and stacked  120  in a paper accumulation unit  110 . 
         [0012]    Individual sheets of paper or printed material  122 , each with a substantially invisible mark  140 ,  142 , are fed individually into a paper accumulation unit  110 . The paper accumulation unit  110  is comprised of sides  112  that align and hold a stack of previously individually fed sheets of stacked paper  120 , a bottom tray  114  that moves down as the papers are added, wherein the movement is resisted by a spring  116  attached to the tray  114  by an attaching means  118 . The paper accumulation unit is attached to a spectrophotometer  130 , which contains at least one lens  132 , which emits light or ultraviolet light beams or other information transmitting medium  134  in the direction of the stacked paper  120 . Each sheet of paper contains a mark  140  which is comprised of a writing, picture, or symbol printed in an ink or other printing means that is not visible to the human eye, but is detectable and readable by a device such as, but not limited to, a spectrophotometer  130 . The spectrophotometer  130  is attached to a computer or other computing means  150  by wire, cable, wireless means, or other communication transmittal medium  152 , through which a signal is transmitted conveying some aspect of the paper stacked in the accumulator  110 . The computer will have received instructions through a computer data input device  154  such as, but not limited to a keyboard, floppy disc, CD readable media, Internet connection, network connection, and the like. These instructions are stored in a computer operable memory  156 . The instructions to be performed when a condition has been reached or achieved by the collective stack of paper  120 . Such a condition may include, but is not limited to, total count of a given number of pages, completion of a set or unit or bundle of papers, receiving of a particular sheet or collection of sheets, and the like. Once the condition is achieved, the computer  150  may then issue instructions across either the same  152  or a different transmittal medium  158  to a peripheral device  160 , which may transport the collected stack of paper  120  to another stage in the graphic arts process such as, but not limited to, binding, bundling, folding, envelope stuffing, spindling and the like. Moving the collective stack of paper  120  will remove the stack of paper  120  from the paper accumulator  110 , leaving the accumulator  110  empty. Once the weight of the stack of paper  120  is removed from the paper tray  114 , this will remove tension from the spring  116 , and cause the paper tray  114  to move upward and return to an initial empty position. Once reset, the device is prepared to receive another new sheet or sheets of paper and enable the accumulation process to repeat as necessary. 
         [0013]    The process of placing the mark on the paper is substantially the reverse of the process involved in reading the mark. First data is input into a computer operable medium through use of an input device and stored in a database or computer operable memory. The computer then converts the data into a mark comprised of a symbol, alphanumeric characters, and the like. Then the mark is placed on the paper using a printing device such as, but not limited to, a printer, a laser printer, a dot matrix printer, and the like. The paper then contains the mark which is then able to be detected, read, and interpreted by a detection means such as the spectrophotometer. 
         [0014]    With reference to  FIG. 2  the present application presents another embodiment which may incorporate multiple spectrophotometers  210  to read marks located on various parts of the page of paper  220 . The spectrophotometers may be located a significant distance apart  230 , or substantially close together  235 . The marks may have only one substantially invisible mark located at one specific point in a page  240 , and may have a mark located at a different position relative to the mark of an earlier page  250 . A page may have a mark located on opposite column sides of the page, such as on the left or right side of the page  260 , or even on opposite reverse sides of a page, such as the front and back of a sheet of paper  270 . The spectrophotometers may read a mark on the opposite reverse side of the page by reading through the page, or an additional spectrophotometers lens might be located on the opposite reverse side of the page to read said mark. The marks may be of different sizes and shapes  280 , such as a large mark covering a large portion of, or substantially all of the page  282 , or a small mark covering a minute portion of the page  284 , a geometric shape  286 , or an obtuse shape  288 . Some pages may have no mark at all  290 , while some pages may have multiple marks  280 . 
         [0015]    More elaborate implementation would comprise of more than one spectrophotometric sensor measuring and decoding these invisible symbologies for executing multiple tasks such as to indicate additional collaterals to be inserted in the envelope such as for use in advertisements, flyers coming from additional feeders connected on the side, and the like. 
         [0016]    With reference to  FIG. 3 , the present application discloses another embodiment which uses a spectrophotometer to perform in substantially the same manner as in the previous aspect, but is able to insert a page or other media when prompted by the reading of a substantially invisible mark  300 . Here, the inline spectrophotometer  310  is used in conjunction with the automated insertion equipment such as insertion equipment made by Pitney Bowes, Bell and Howell, Gunther and the like. These equipments depend on symbology in the first page  320  and a last page  340  of the job  350  to allow the insertion of an insert page  330  anywhere in between the first page  320  and last page  340 . 
         [0017]    With reference to  FIG. 4 , the present application discloses an embodiment that may be used to facilitate mailings  400 . After the insertion process  300 , the combined inserted material  410 , or any material, may be folded  420  and the folded contents placed into envelopes  430  and placed in a medium ready to be mailed out  440 . The mailing process may also occur without any preceding insertion process. 
         [0018]    With reference to  FIG. 5  the present application discloses a plurality of types of marks  500  incorporated by the present application. The paper  510  may be printed with a special symbology  520  composed of a yellow low area coverage marks or with clear toner. Such a mark may be composed of a number  530 , lettering  540 , a symbol  550  such as, but not limited to a geographical shape, a logo, a trademark, a drawing, or a universal product code (UPC)  560 , a photograph  570 , or any other type of mark comprised of any conceivable symbol or writing that might convey a meaning to a person or device that was made aware of such an mark, or any such combination of these elements. The ink or toner used to affix the mark will be so faint that the mark and the communication contained therein will be essentially invisible as not visible to the unaided human eye. A viewer or reader  580  will be necessary to read and interpret such a mark. The viewer or reader will be necessary to find and expose the existence of the mark. Once the mark is exposed and viewable, a device such as, but not limited to, a computer may be necessary in order to interpret and derive meaning from the uncovered mark. This will be a necessary condition for operation if the mark is a symbol not readily interpretable to an unaided person, such as a UPC code. 
         [0019]    The present application may provide an extension to a sensing mechanism for a finishing control management system. A simple implementation would consist of a single spectrophotometric sensor  530  mounted on the paper accumulator, which is a modified version of a stacker specifically designed for accumulating sheets  100 . The sheet with the invisible mark on it would indicate the end of the document allowing the stack of sheets of documents to be moved to the next stage, generally for automatically stuffing, inserting etc. which will indicate the beginning of the insertion. 
         [0020]    A spectrophotometer, such as the inline spectrophotometer developed by XEROX, possesses a sensitivity which makes this device ideal for measuring low area coverage yellow marks or marks with clear toner. The measurement technique has been demonstrated successfully in the laboratory equipment. 
         [0021]    With reference to  FIG. 6 , a method of using the disclosure of the present application is presented  600 . This method comprises of first placing the non-visible marks on at least one page  610 , detecting the mark using a detection apparatus  620 , reading the detected mark  630 ; interpreting the read 
         [0022]    It will be appreciated that various of the above-disclosed and other features and functions, or alternatives thereof, may be desirably combined into many other different systems or applications. Also that various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.