Abstract:
An integrated document handling and platen scanning apparatus is provided. The apparatus includes a main body; a platen glass positionally fixed to the main body; a CVT glass area positionally fixed to the main body; a first image module attached to the main body, the first image module being movable across the platen glass to scan an image on a first side of a document; a document handler attached to the main body and configured to invert the document and to feed the document across the CVT glass area; and an attachment point on the main body that attaches the main body to a copier body of a photocopier such that the main body, platen glass, first image module, and document handler move as a unit relative to the copier body. The first image module is configured to remain stationary and scan the image on the first side of the document as the document is fed across the CVT glass area.

Description:
BACKGROUND 
       [0001]    The disclosure relates generally to an integrated platen scanner and document handler for use as part of a copier, multifunctional printer or standalone scanning device. 
         [0002]    Conventional automatic duplex document sheet handling and imaging systems have increased the effective imaging, scanning, or copying rate for both sides of sets of duplex documents. Such conventional automatic document handlers automatically sequentially feed and image a set or job of plural duplex document sheets, while at the same time, these conventional document handlers are capable of feeding and copying simplex documents. A variety of systems and methods are conventionally used in the scanning operation. In a typical scanning operation, light from the scanner illuminates the surface of an original document and the document moving past an image sensor detects the intensity of light reflected from each location in the image and stores it as a proportionate electrical charge at a corresponding pixel location. Various exemplary scanning devices employ stationary Full-Width Arrays (FWA) or linear Charge-Coupled Device (CCD) arrays. In such systems in which the imaging arrays are stationary, the arrays are often separated from the image to be scanned by a platen glass or other transparent surface or lens overlying the imaging array. The platen glass is positioned on an upper surface of the copier and below (and separate from) the document handler. The scanner&#39;s document handler can be a multi-pass configuration with just a platen scanner and inverting mechanism, or a single pass device with a scanner in both the platen and document handler. 
         [0003]    Document handlers employ various exemplary methods to move the original document to the transparent surface. One such exemplary method, commonly referred to as Constant Velocity Transport (CVT) scanning, employs a belt, roll, drum or other like device to move the image substrate to be scanned across a linear sensor, such as, for example, Full-Width Arrays (FWA) or linear Charge-Coupled Device (CCD) arrays. One or more scanners, printers, video displays and/or computer storage devices are often connected via a communications network, thereby providing a digital reproduction system. For example, a digital copier may incorporate a scanner and a digital printer. 
         [0004]    Configurations as described above having the platen glass positioned on an upper surface of the copier and below and separate from the document handler have several disadvantages. For example, for copying books, the user has to position the book with the pages to be copied faced downward so that they are exposed to the image module located below the platen glass. Thus to copy multiple pages from the book, the user is forced to lift the book off the platen glass, turn the page over and then place the book face down on the platen glass again. This can often cause it to be difficult to properly position the image to be copied. Another disadvantage of this configuration is that the often very bright light from the scanner is directed upward toward the user and, as a result, can make using the copier uncomfortable. 
         [0005]    For the reasons stated above, and for other reasons stated below which will become apparent to those skilled in the art upon reading and understanding the present specification, there is a need in the art for a copier that has a moving, or scanning, image module that is directed downward toward the image being copied. 
       SUMMARY 
       [0006]    An integrated platen scanner and document handler is disclosed. 
         [0007]    An embodiment of the disclosure includes an integrated document handling and platen scanning apparatus for use with a photocopier, multifunctional printer or standalone scanning device. The apparatus comprises a main body; a platen glass positionally fixed to the main body; a CVT glass area positionally fixed to the main body; a first image module attached to the main body, the first image module being movable across the platen glass to scan an image on a first side of a document; a document handler attached to the main body, the document handler being configured to invert the document and to feed the document across the CVT glass area; and an attachment point on the main body that is adapted to attach the main body to a copier body of the photocopier such that the main body, platen glass, first image module, and document handler move as a unit relative to the copier body. The first image module is configured to remain stationary and scan the image on the first side of the document as the document is fed across the CVT glass area. 
         [0008]    Another embodiment of the disclosure includes a copier, comprising: a copier body; an image forming section attached to the copier body; a media supply attached to the copier body; an output tray attached to the copier body and configured to receive media on which an image has been formed by the copier; a surface on an upper area of the copier body; an integrated document handling and platen scanning apparatus having a main body; a platen glass positionally fixed to the main body; a CVT glass area positionally fixed to the main body; a first image module attached to the main body, the first image module being movable across the platen glass to scan an image on a first side of a document; a document handler attached to the main body, the document handler being configured to invert the document and to feed the document across the CVT glass area; and an attachment point on the main body that attaches the main body to the copier body such that the main body, platen glass, CVT glass area, first image module, and document handler move as a unit relative to the copier body. The first image module is configured to remain stationary and scan the image on the first side of the document as the document is fed across the CVT glass area, and the document handling and platen scanning apparatus is movably attached to the copier body such that the apparatus can be moved to a position in which the platen glass is adjacent and parallel to the surface on the upper area of the copier body. 
         [0009]    Another embodiment of the disclosure includes a document handling and platen scanning apparatus for use with a photocopier, multifunctional printer or standalone scanning device. The apparatus includes a main body; a platen glass positionally fixed to the main body; a CVT glass area positionally fixed to the main body; a first image module attached to the main body, the first image module being movable across the platen glass to scan an image on a first side of a document; a document handler attached to the main body, the document handler being configured to feed a second side of the document past a separate fixed image module; and an attachment point on the main body that is adapted to attach the main body to a copier body of the photocopier such that the main body, platen glass, first image module, and document handler move as a unit relative to the copier body, this commonly described as a single pass configuration. 
         [0010]    Another embodiment of the disclosure includes a copier that includes a copier body; an image forming section attached to the copier body; a media supply attached to the copier body; an output tray attached to the copier body and configured to receive media on which an image has been formed by the copier; a surface on an upper area of the copier body; an integrated document handling and platen scanning apparatus having a main body; a platen glass positionally fixed to the main body; a CVT glass area positionally fixed to the main body; a first image module attached to the main body, the first image module being movable across the platen glass to scan an image on a first side of a document; a document handler attached to the main body, the document handler being configured to feed a second side of the document past a separate fixed image module; and an attachment point on the main body that attaches the main body to the copier body such that the main body, platen glass, first image module, and document handler move as a unit relative to the copier body, this commonly described as a single pass configuration. The document handling and platen scanning apparatus is movably attached to the copier body such that the apparatus can be moved to a position in which the platen glass is adjacent and parallel to the surface on the upper area of the copier body. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]      FIG. 1  is an exemplary photocopier in accordance with one possible embodiment of the disclosure; 
           [0012]      FIG. 2  is an exemplary diagram of a document handler; 
           [0013]      FIG. 3  is an exemplary diagram of a platen scanner; and 
           [0014]      FIG. 4  is an exemplary diagram of an integrated platen and document handler scanner in accordance with one possible embodiment of the disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0015]    Illustrative elements are described in detail below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers&#39; specific goals, such as compliance with system-related and business-related constraints, which will vary from one of implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art after having the benefit of the present disclosure. 
         [0016]    Aspects of the embodiments disclosed herein relate to integrating platen scanning into a document handler that can be part of a copier or printer. By moving platen scanning from the main body of the copier and moving it to the document handler, many benefits are achieved. 
         [0017]      FIG. 1  shows an example of a copier  10  in accordance with embodiments of the disclosure. Copier  10  has a media supply drawer  20 , an output tray  30 , and a document handler  300 . A sheet of media, for example paper, is fed from supply drawer  20  through an internal image forming mechanism of copier  10  and then fed to output tray  30 . Documents can be fed into copier  10  in a number of ways. For example, a document can be loaded into document handler  300  which, in turn, feeds the document past an image module(s) (described below) located in the document handler to read an image on the document. 
         [0018]      FIG. 2  shows an example of a conventional single pass document handling module  100 . Document handling module  100  includes a document handler  110  that receives documents from an input tray  120  and feeds them past a stationary image module  130 , only applicable to single pass document handlers. 
         [0019]      FIG. 3  shows an example of a conventional platen scanner module  200  that can be located on an upper area of a copier. Platen scanner module  200  has a platen glass  210  on which a document to be copied can be placed. A moving image module  220  is then moved in the direction of arrow A underneath platen glass  210  to scan an image on the document. Platen scanner module  200  has a body  230  that has a rear side  240  and a left side  250  as viewed from the front of the copier. Attachment mechanisms, or hinges, can attach the document handler module  100  of  FIG. 2  to the rear side  240  of platen scanner module  200  such that document handler module  100  can be pivoted to an open position such that a document or book can be placed face down on platen glass  210  for copying. 
         [0020]      FIG. 4  shows an exemplary embodiment of the disclosure.  FIG. 4  shows a document handler and scanning apparatus  300  that can be attached to a copier or can be attached to an existing printer to transform the printer into a copier or used as a standalone scanning device mounted onto a separate base. Document handler and scanning apparatus  300  has a document handler  310  and an input tray  320  for holding documents to be fed into document handler  310 . On a lower side of document handler and scanning apparatus  300 , a platen glass  330  is located. A CVT glass is located either above the plane of platen glass  330  (in the embodiment shown in  FIG. 4 ) or in the same plane as platen glass  330 . In embodiments where the CVT glass is in the same plane as platen glass  330 , the CVT glass can be located to the left of platen glass  330  in  FIG. 4 . A moving image module  350  is positioned above platen glass  330  and moves relative to platen glass  330  in the direction of arrow B to scan an image of a document positioned below flat glass  330 . Moving image module  350  can alternatively remain stationary above (or otherwise adjacent to) the CVT glass and scan the image of the document as document handler  310  moves the document past the CVT glass. For simplicity, the term “document” will be understood to include anything that is scanned by moving image module  350  including, but not limited to, a sheet of paper, a book, or any other object. It is also noted that document handler  310  may be capable of handling only certain types of documents. 
         [0021]    The exemplary embodiment shown in  FIG. 4  also includes a stationary image module  340 , for single pass configuration only. Some embodiments of the disclosure include only moving image module  350  that can both be moved relative to platen glass  330  and stay stationary relative to the CVT glass, while other embodiments include both moving image module  350  and stationary image module  340 . By having both moving image module  350  and stationary image module  340 , a document fed past stationary image module  340  can have one side of the document read by stationary image module  340  while the other side of the document is read by moving image module  350  in its stationary position. In this way, simultaneous duplex scanning is possible. In embodiments that include only moving image module  350 , a two-sided document can have its first side scanned by moving image module  350 , inverted by document handler  310  (or some other method), and then have its second side scanned by moving image module  350  (in either its moving or stationary position). 
         [0022]    In some embodiments, moving image module  350  can rotate when a two-sided document is fed through the document handler so that the document never leaves the document handler. In these embodiments, the CVT glass can be positioned above the plane of platen glass  330  so that the document passes by both moving image module  350  (in its stationary position) and stationary image module  340 . In some embodiments, the document passes simultaneously by both moving image module  350  (in its stationary position) and stationary image module  340 . 
         [0023]    Document handler and scanning apparatus  300  can be part of a copier or can be attached to an existing printer to transform the printer into a copier. Because moving image module  350  and platen glass  330  are parts of document handler and scanning apparatus  300 , no platen glass or image module need be included as part of the main body of the copier. As a result, the surface (usually an upper surface) of the copier on which document handler and scanning apparatus  300  sits need only be a surface that corresponds in shape to platen glass  330 . For example, if platen glass  330  is flat then the surface of the copier need only be a flat surface. In some examples, this surface is an opaque surface, for example, a white opaque surface. 
         [0024]    Many benefits are achieved by embodiments of the disclosure as compared to conventional copier configurations because documents scanned by the platen scanner are positioned image side up. 
         [0025]    Because the image being scanned is face up, it is easier for a user to position the document so that the desired portion of the image is scanned in the desired orientation. An example in which this is useful is the copying of pages of a book. Conventionally, a book must be positioned face down on the platen glass during copying. Because the image is face down, it is difficult for the user to properly position the book for copying. However, with embodiments of the disclosure a user can see the pages being copied while the book is in the position for copying. In addition, when copying multiple pages of the same book, the pages can simply be turned without disturbing the position of the book. This greatly increases the speed in which a section of a book can be copied. 
         [0026]    Generally, faster scanners require brighter illumination. Embodiments of the disclosure result in the illumination pointing down away from the user. This naturally shields the user from the bright illumination. 
         [0027]    Because the platen glass is facing down as opposed to being the surface on which the document is placed, the platen glass is less likely to be contaminated by, for example, fingerprints. Also, because the platen glass is not the surface on which a book, for example, is pressed onto during copying, the platen glass of embodiments of the disclosure does not need to be as strong as in a conventional configuration. In addition, because the platen glass is facing down as opposed to being the surface on which the item to be copied is placed, the copier is less likely to be used in ways other than its intended use. 
         [0028]    Another benefit of embodiments of the disclosure is that the platen drive motor of a conventional copier can be eliminated because one of the document handler motors can be used to drive moving image module  350 . 
         [0029]    Embodiments of the disclosure can be added to an existing printer as described above. This allows a user to buy such a printer without copying capability and then, at a later date, purchase a document handler and scanning apparatus such as document handler scanning apparatus  300  to transform the printer into a copier or multifunctional device. 
         [0030]    By incorporating moving image module  350  into document handler and scanning apparatus  300 , service and replacement of moving image module  350  is simplified because access to the moving image module does not require disassembly of the main body of the copier. 
         [0031]    By including moving image module  350  in document handler and scanning apparatus  300 , an overall height of the copier can be reduced. This can save on shipping expense because a larger number of copiers can fit into a shipping container. Also, reduced height requirement for the copying mechanism can result in more vertical space being available for paper capacity. 
         [0032]    Including moving image module  350  in document handler and scanning apparatus  300 , permits the inclusion of all the electronics, cabling, sensors and modules in document handler and scanning apparatus  300  so fewer connections are required between document handler and scanning apparatus  300  and the main body of the copier. Also, the electronics for scanning can all be integrated into one printed circuit board. Additionally, combining the two scanning functions into one allows for reduction in the cost of housing and associated weight. Furthermore, the document handler to the CVT interfaces are now in one module and therefore a reduction of the tolerance constraints across multiple modules is achieved. 
         [0033]    It will be appreciated that variations 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.