Sheet sorting apparatus

Abstract: A sheet sorting apparatus (1) installed on a sheet discharge side of an image processing apparatus and adapted to paste a tag on a predetermined sheet discharged from the image processing apparatus is disclosed, comprising a change-over means (44) for switching a path, in which the sheet (3) is transferred, to either a first path in which the tag (4) is pasted on the sheet (3) or a second path in which the tag (4) is not pasted on the sheet (3); a draw-out means (53, 54) for drawing out a band tape (52) coated at one side edge portion thereof with a pressure sensitive adhesive; a cutting means (63) for preparing the tag (4) by cutting the band tape (52) at a predetermined portion thereof; a pasting means (57, 60) for introducing the prepared tag (4) to a predetermined position with respect to the sheet (3), holding the tag from both sides thereof with a part thereof superposed on the sheet, and pasting the tag on the sheet; a receiving means (12) for recieving the sheet (3), on which the tag (4) is pasted by the pasting means (57, 60); and a control means (66) for controlling movements of the change-over means (44), the draw-out means (53, 54) and the cutting means (63).

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention: This invention relates to a sheet sorting apparatus, and more particularly to a sheet sorting apparatus provided with a sheet tray and adapted to sort sheet S by pasting tags thereon. Such devices are disclosed in US 5655 207, WO96 076 09, and FR 1487013 . 2. Description of the Related Art: When sheets are printed out by an image processing apparatus, such as a facsimile transfer unit, a printer and a copier, sheets are discharged in order therefrom and stacked on one tray. During this time, when a sheaf of sheets are taken out from the tray after the printing of one document has finished, a problem does not arise, but, in some cases, sheets of a plurality of documents are discharged continuously and stacked on one tray. In such a case, when sheets are classified by documents and discharged, an end to a document is recognized conveniently on taking out. The sorting apparatuses adapted to have such an end to a document recognized include, for example, an offsetting function-carrying apparatus. In this apparatus, sheet discharge positions are staggered by documents. Owing to this arrangement, the positions in which the sheets are discharged are staggered little by little by sheets constituting the same document so that it comes to be understood that the portion of a sheaf of sheets at which a position is staggered shows an end to a document. There is an apparatus having a function of inserting a ribbon between documents. In this apparatus, however, although a ribbon is placed on sheets discharged onto a tray, and subsequent sheets are discharged onto the ribbon, i.e., ribbons are inserted between the sheets, during the supplying of a ribbon, the discharging of sheets onto the tray is temporarily stopped, so that a ribbon inserting time is required, this causing the productivity to lower. Also, since such a ribbon is only held between sheets, there is the possibility that the ribbon falls off when a sheaf of sheets are taken out from the tray, and this causes a problem that a sorting position to becomes indefinite. There is also a method in which a plurality of trays are prepared so as to change trays whenever a document is discharged. This method causes an apparatus therefor to be enlarged, and the manufacturing cost to increase, and such an apparatus cannot be mounted on a small-sized machine. Further, when sheets read continuously in an image scanner or reader are discharged, the same problems as mentioned above also arise. Thus, the related art sheet sorting apparatuses have a low productivity, large dimensions and a high manufacturing cost, or a difficulty in carrying out a reliable sorting operation. SUMMARY OF THE INVENTION The present invention has been developed in view of such a condition, and an object thereof is to enable to be attained by a simple and small-sized structure, and by pasting tags to be pasted on sheets and discharging the tag-pasted sheets onto a predetermined receiver, to be able to sort sheets easily and reliably with reference to the tags pasted thereon. The sheet sorting apparatus according to the invention comprises a change-over means for switching a path, in which a sheet is transferred, to either a first path in which a tag is pasted on the sheet or a second path in which the tag is not pasted on the sheet, a draw-out means for drawing out a band tape coated at one side edge portion thereof with a pressure sensitive adhesive, a cutting means for preparing the tag by cutting the band tape at a predetermined portion thereof, a pasting means for introducing the prepared tag to a predetermined position on the sheet, holding the tag from both sides thereof with a part thereof superposed on the sheet, and pasting the tag on the sheet, a receiving means for receiving the sheet on which the tag is pasted by the pasting means, and a control means for controlling movements of the change-over means, draw-out means and cutting means. In the sheet sorting according to the invention, the change-over means switches a path, in which a sheet is transferred, to either a first path in which a tag is pasted on the sheet or a second path in which a tag is not pasted thereon, the draw-out means draws out a band tape coated at one side edge portion thereof with a pressure sensitive adhesive, the cutting means prepares the tag by cutting a predetermined portion of the band tape, the pasting means introduces the prepared tag to a predetermined position on the sheet, holds the tag from both sides thereof with a part thereof superposed on the sheet and pastes the tag on the sheet, the receiving means receives the sheet on which the tag is pasted by the pasting means, and the control means controls the movements of the change-over means, draw-out means and cutting means. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a drawing showing a mode of embodiment of the present invention. Fig. 2 is a drawing showing a sheet 3 on which a tag 4 is pasted. Fig. 3 is a drawing showing the construction of a mode of embodiment of the sheet sorting apparatus 1. Fig. 4 is a drawing describing an operation carried out when the sheet sorting apparatus 1 is fixed to and removed from a printer 2. Fig. 5 is a drawing describing an operation of a mechanism for switching a transfer path for the sheet 3. Fig. 6 is a drawing describing the transmission of a driving force of a sheet discharge roller 16 of the printer 2. Fig. 7 is a drawing describing a band tape 52. Fig. 8 is a drawing describing a roll case 68. Fig. 9 is a drawing describing the roll case 68. Fig. 10 is a drawing describing an operation of a retainer lever 72 performed by a projection 67A of a storage box 67. Fig. 11 is a drawing showing the construction of a cutting portion 63 and an eccentric cam 62. Fig. 12 is a drawing showing the construction of a lower edge 82. Fig. 13 is a drawing showing the construction of a guide 83. Fig. 14 is a drawing describing the covering of the cutting portion 63. Fig. 15 is a drawing describing signals inputted from the printer 2 into the sheet sorting apparatus 1, and signals outputted from the sheet sorting apparatus 1 to the printer 2. Fig. 16 is a drawing describing the timing of signals. Fig. 17 is a drawing describing the relation between tag width signals 1 ○, 2 ○ and time t1. Fig. 18 is a drawing describing sheets 3 stacked on a tray 12 for discharged sheet. Fig. 19 is a flow chart describing the operation of the sheet sorting apparatus 1. Fig. 20 is a drawing describing another construction of the tag pasting portion 11. Fig. 21 is a drawing describing the operations of a light intercepting plate 101 and a sensor 102. Fig. 22 is a drawing describing the construction of a storage box 67 of the tag pasting portion 11 shown in Fig. 20. Fig. 23 is a drawing describing another construction of the storage box 67 of the tag pasting portion 11 shown in Fig. 20. Fig. 24 is a drawing describing an operation of the tag pasting portion 11 shown in Fig. 20. Fig. 25 is a drawing describing the operation of the tag pasting portion 11 shown in Fig. 20. Fig. 26 is a drawing describing the operation of the tag pasting portion 11 shown in Fig. 20. Fig. 27 is a drawing describing the operation of the tag pasting portion 11 shown in Fig. 20. Fig. 28 is a drawing describing the operation of the tag pasting portion 11 shown in Fig. 20. Fig. 29 is a drawing describing the operation of the tag pasting portion 11 shown in Fig. 20. Fig. 30 is a time chart describing a motor operating signal for the tag pasting portion 11 shown in Fig. 20. Fig. 31 is a time chart describing motor operating signals generated when the tag pasting portion 11 is returned to an initial condition. Fig. 32 is a flow chart describing a process for the returning of the tag pasting portion 11. Fig. 33 is a drawing showing the construction of another mode of embodiment of the sheet sorting apparatus. Fig. 34 is a drawing showing the construction of still another mode of embodiment of the sheet sorting apparatus. DESCRIPTION OF THE PREFERRED EMBODIMENTS The modes of embodying the present invention will now be described. In order to clarify the correlation between each means of the inventions defined in the claims and the embodiments of the following modes, the characteristics of the present invention are described as follows by putting names of parts (mere examples) of the corresponding embodiments of the modes in the parentheses following the names of the means. This description does not, of course, mean that each means is limited to the part shown below. Namely, the sheet sorting apparatus defined in Claim 1 is characterized in that it includes a change-over means (for example, a flapper 44 of Fig. 3) for switching a path, in which a sheet is transferred, to either a first path in which a tag is pasted on the sheet or a second path in which the tag is not pasted thereon, a draw-out means (for example, draw- out rollers 53, 54 of Fig. 3) for drawing out a band tape coated at one side edge portion thereof with a pressure sensitive adhesive, a cutting means (for example, a cutting portion 63 of Fig. 3) for preparing the tag by cutting the band tape at a predetermined portion thereof, a pasting means (for example, a tag pasting belt 57 and a transfer roller 60) of Fig. 3 for introducing the prepared tag to a predetermined position on the sheet, holding the tag from both sides thereof with a part thereof superposed on the sheet, and pasting the tag on the sheet, a receiving means (for example, a tray 12 for discharged sheet of Fig. 3) for receiving the sheet, on which the tag is pasted by the pasting means, and a control means (for example, a controller 66 of Fig. 3) for controlling movements of the change-over means, draw-out means and cutting means. Fig. 1 is a diagram showing a first mode of embodiment of the present invention. A sheet sorting apparatus 1 is installed at an upper portion of a discharge port for a sheet 3 of a printer 2, and a pasting operation is carried out during the transfer of the sheet without stopping a discharge operation of the printer 2. The sheet sorting apparatus 1 has a tag pasting portion 11 and a tray 12 for discharged sheet. The sheets 3 on which the tags 4 are pasted are stacked on the tray 12 for discharged sheet after the sheets 3 have been discharged from the sheet sorting apparatus 1. Fig. 2 is a diagram showing a sheet 3 on which the tag 4 is pasted by the sheet sorting apparatus 1. The sorting of the sheets 3 on the tray 12 for discharged sheet is carried out with the pasted tags 4. Fig. 3 is a diagram showing the construction of the first mode of embodiment of the sheet sorting apparatus 1. The sheet sorting apparatus 1 is fixed to the printer 2 by inserting a projecting portion 21 of the apparatus 1 into a hole 15 of the printer 2, and hanging a hook 22 on another hole 14 of the printer 2. Fig. 4 is a diagram describing an operation for fixing and removing the sheet sorting apparatus 1 to and from the printer 2. A lever 25 is pivotably fixed to the sheet sorting apparatus 1 via a shaft 26. The lever 25 can be turned around the shaft 26 in an arc of within a predetermined angle in a direction of an arrow in Fig 4, and is normally urged by a spring 23 so that the hook 22 is inserted into the hole 14 of the printer 2. When the sheet sorting apparatus 1 is removed from the printer 2, the lever 25 is turned against a resilient force of the spring 23 in a direction in which the hook 22leaves the hole 14 of the printer 2, and the sheet sorting apparatus 1 may be drawn apart from the printer 2. Fig. 5 is a diagram describing an operation of a mechanism for switching the path in which a sheet 3 is transferred. The flapper 44 is turned clockwise or counter-clockwise around a shaft 43. When the flapper 44 is in a position of a solid line (turned counter-clockwise) in the drawing, a sheet 3 sent by sheet discharge rollers 16, 17 of the printer 2 is sent to the sheet sorting apparatus 1. When the flapper 44 is in a position of a broken line (turned clockwise) in the drawing, the sheet 3 sent by the sheet discharge rollers 16, 17 of the printer 2 is discharged onto a tray for discharged sheet in the printer 2. A plunger 42 of a solenoid 41 is combined with one end of a link 45. The other end of the link 45 is combined with a pin 46 of the flapper 44. When a voltage applied to the solenoid 41 is zero volt, i.e., when the solenoid 41 is in an off-state (a non-excited state), the flapper 44 is turned clockwise around the shaft 43 by an urging force of a spring (not shown), and the plunger 42 takes an outwardly (downwardly in Fig. 5) projecting position due to the link 45. When the solenoid 41 is in an on-state (excited state), it draws the plunger 42 toward a case for the solenoid 41 against the urging force of the spring, so that the pin 46 is moved up in Fig. 5 via the link 45. Accordingly, the flapper 44 is turned counter-clockwise around the shaft 43 to take a position in which it contacts a transfer path in the sheet sorting apparatus 1. As described above, the flapper 44 is moved by the voltage applied to the solenoid 41, and the transfer path of the sheet 3 is switched to the side of the tray for discharged sheet in the printer 2, or to the side of the sheet sorting apparatus 1. Returning to Fig. 3, a driving force of the sheet discharge roller 16 of the printer 2 is transmitted to the sheet sorting apparatus 1 via a belt and a transmission gear 13. Fig. 6 is a diagram describing the transmission of the driving force of the sheet discharge roller 16 of the printer 2. When the sheet sorting apparatus 1 is fixed to the printer 2, the transmission gear 13 to which the driving force of the sheet discharge roller 16 of the printer 2 is transmitted engages a transmission gear 31 of the sheet sorting apparatus 1 to transmit the driving force thereto. The transmission gear 31 transmits the driving force to a transfer roller 33 via a transmission gear 32. The driving force of the transfer roller 33 is transmitted to another transfer roller 35 and a transmission gear 37 of the sheet sorting apparatus 1 shown in Fig. 3 via a gear (rotated with the transfer roller 33) mounted fixedly on the same shaft as the transfer roller 33 and a toothed belt 40. The driving force of the transmission gear 37 is transmitted to a transfer roller 38. The sheet 3 transferred to the side of the sheet sorting apparatus 1 is transferred at a predetermined speed as it is held between the transfer roller 33 and a driven roller 34, the transfer roller 35 and a driven roller 36 and a transfer roller 38 and a driven roller 39, to be discharged onto a tray 12 for discharged sheet. Thus, the driving force for transferring the sheet 3 in the sheet sorting apparatus 1 is supplied from the printer 2. A tag pasting portion 11 of the sheet sorting apparatus 1 is provided with a limit switch 64 in an introduction path for the sheet 3, and a front edge of the sheet 3 is detected by a lever 65 of this limit switch 64. A roll case 68 is provided removably in the interior of the tag pasting portion 11. The roll case 68 retains a sheet rol15l rotatably therein. This sheet rol15l is a roll having a sheet band tape 52 taken up. This band tape 52 is coated at one side edge portion thereof with a pressure sensitive adhesive 69 as shown in Fig. 7. A pair of draw-out rollers 53, 54 are adapted to guide the band tape 52, which is drawn out continuously from the sheet rol15l, to a predetermined position. Above the draw-out rollers 53, 53, a cutting portion 63 is provided, which is adapted to cut the drawn-out band tape 52 to a predetermined length with a forwardly moved upper edge 81, to form a tag 4. The tag 4 separated one by one from a front end of the band tape 52 is transferred by guide rollers 58, 59 and tag pasting belt 57 and guided so that the tag contacts a predetermined portion of a side edge of the sheet 3. The tag pasting belt 57 is adapted to be rewound between a driving pulley 55 and a driven pulley 56, and generally turned clockwise or counter-clockwise at an angle in a predetermined range around the driving pulley 55. When the portion of the tag pasting belt 57 which is on the side of the driven pulley 56 is turned counter-clockwise, the tag pasting belt 57 and a transfer roller 60 contact each other to hold the sheet 3 and tag 4 therebetween, and transfer the sheet and tag while pressing them at a predetermined pressure. Since the portion coated with the adhesive 69 of the tag 4 is thus brought into pressure contact with the sheet 3, the sheet 3 and tag 4 are pasted on each other. Since a rotational speed of the tag pasting belt 57 and that of the transfer roller 60 are set equal while these belt and roller are driven synchronously with a transfer movement of the sheet 3, the tag 4 can be pasted on the sheet 3 by a series of operations without stopping the transfer movement of the sheet 3. In an initial condition, the driven pulley 56 is in a position to which it has been turned clockwise (moved down in the drawing), and the tag pasting belt 57 and transfer roller 60 are separated by a predetermined distance, so that the transfer of the sheet 3 is not prevented. The draw-out roller 53, cutting portion 63 and tag pasting belt 57 are combined suitably with a tacking action motor 61, and rotated intermittently at predetermined times. When the tacking action motor 61 is rotated forward, a driving force thereof is transmitted to the draw-out roller 53, tag pasting belt 57 and transfer roller 60, and not to an eccentric cam 62 which drives the cutting portion 63. When the tacking action motor 61 is rotated reversely, the driving force thereof is transmitted to the eccentric cam 62, and not to the draw-out roller 53, tag pasting belt 57 and transfer roller 60. A storage box 67 is detachable, and stores therein tags 4 not pasted on (wasted) the sheet 3, which occurs during the installation of the sheet rol15l, and the adhesive deposited on the cutting portion 63 and dropped due to a movement thereof. The tags 4 and adhesive stored in the storage box 67 are discarded at a suitable time. The storage box 67 has a projection 67A adapted to push a release lever 73 of a roll case 68 which will be described later. A controller 66 is adapted to control the driving of the tack action motor 61 on the basis of signals from and data stored in the interior of the printer 2 and limit switch 64 and data stored therein. The installation of the sheet rol15l in the roll case 68 will now be described. Fig. 8(A) is a top view of the roll case 68 in which the sheet rol15l has not yet been installed. Fig. 8 (B) is a front view of the roll case 68 in which the sheet rol15l has not yet been installed. In a procedure for installing the sheet rol15l in the roll case 68, a rotary shaft 75 for the roll is inserted into a central hole of the sheet rol15l, and the roll case 68 is bent at bending portions 74-174-2, then a hole 76 of the roll case 68 is fitted around a front end portion 75A of the rotary shaft 75. Fig. 9(A) is a top view of the roll case 68 in which the sheet rol15l has been installed. Since the rotary shaft 75 of the roll is inserted in the sheet rol15l so that a position of a side surface of the sheet rol15l is limited only a rotational movement thereof around the rotary shaft 75 can be made with respect to the roll case 68. A front end of the band tape 52 on the sheet rol15l is then set in a predetermined position in the roll case 68. Fig. 9 (B) is a side view of the roll case 68 in which the sheet rol15l has been installed. The portion of the roll case 68 from which the band tape 52 is drawn out is provided with a retainer lever 721 and a tape end holder 71-1. The roll case 68 is provided in a position contacting an end portion thereof, which is opposite to the end portion thereof which the retainer lever 721 and a tape end holder 71-1 for the band tape 52 contact, with a retainer lever 72-2 and a tape end holder 712, though they are not shown in Fig. 9(B). The retainer lever 721 is urged so as to be pressed against the tape end holder 71-1. The retainer lever 721 is turned against this urging force so as to be separated from the tape end holder 71-1, and the front end of the band tape 52 on the sheet rol15l is inserted into a clearance between the tape end holder 71-1 and retainer lever 721. The same operation is carried out with respect to the tape end holder 712 and retainer lever 72-2 as well. Consequently, even when vibration is applied to the roll case 68 during an operation for fixing the roll case 68 to the tag pasting portion 11, positions in directions perpendicular to the plane of the band tape 52 with respect to the roll case 68 (positions in the directions shown by arrows in Fig. 9(B)). Fig. 9(C) is a front view of the roll case 68 in which the sheet rol15l has been installed. The tape end holders 71-1712 and retainer levers 72-172-2 hold end portions on both sides of the front end of the band tape 52 therebetween. The roll case 68 is provided with release levers 73-173-2 for turning the retainer levers 72-172-2 in a direction in which these levers leave the tape end holders 71-1712. Fig. 10 is a diagram taken along a section A-A in Fig. 9(C), and describes a movement of a retainer lever 72 made by a projection 67A of the storage box 67. When the storage box 67 is fixed to the tag pasting portion 11 in which the roll case 68 is installed, the projection 67A of the storage box 67 pushes the release lever 73 of the roll case 68 in the direction of an arrow in Fig. 10. As a result, the retainer lever 72 is turned in the direction in which it leaves the tape end holder 71, to release the band tape 52. During this time, the band tape 52 is held between the draw-out rollers 53, 54, so that it is retained in a predetermined position. Employing such a structure enables the sheet rol15l to be set easily and reliably, and prevents unnecessary resistance from being exerted on the band tape 52 during an operation of the sheet sorting apparatus 1. The construction of the cutting portion 63 will now be described. Fig. 11 is a diagram showing the construction of the cutting portion 63 and eccentric cam 62. The cutting portion 63 comprises an upper edge 81, a lower edge 82 and a guide 83. The lower edge 82 and guide 83 are fixed to the tag pasting portion 11. When the eccentric cam 62 is turned around a shaft 84, the upper edge 81 slidingly moves on the lower edge 82 in the direction of an arrow in the drawing to cut the band tape 52. When the eccentric cam 62 is further turned after the cutting of the band tape 52 has been done, the upper edge 81 returns to the original position (position in the drawing). Fig. 12 is a diagram showing the construction of the lower edge 82. When the cutting of the band tape 52 is done repeatedly, the adhesive 69 is deposited on the upper edge 81. When the adhesive 69 deposited on the upper edge 81 is deposited on a portion between the upper and lower edges 8182 due to the sliding movement of the upper edge 81, a very high sliding resistance occurs. The lower edge 82 has a hole 85 which decreases a touch area thereof with respect to the upper edge 81, and sliding resistance thereof. Fig. 13 is a diagram showing the construction of the guide 83. In the same manner as in the case of the lower edge 82, when the adhesive 69 deposited on the upper edge 81 is deposited on a portion between the upper edge 81 and guide 83, a very high sliding resistance occurs. The guide 83 has holes 86-186-2 which decrease an area of the portion, on which the adhesive 69 is deposited, between the guide 83 and upper edge 81, and this sliding resistance. Because the lower edge 82 and guide 83 are formed in this manner, the cutting portion 63 can be operated stably. Fig. 14 is a diagram describing the covering of the cutting portion 63. Fig. 14 (A) is a front view of the tag pasting portion 11. Separately from a cover 91 opened and closed at the time of installation of the roll case 68 in which the sheet 51 is installed, covers 92-192-2 for the cutting portion are provided. Therefore, even at the time of installation of the roll case 68, the cutting portion 63 is not exposed, and these covers prevent the upper and lower edges 8182 from hurting a user. Fig. 14 (B) is a side view of the tag pasting portion 11 with the cover 91 opened. Even when the cover 91 is opened, the cutting portion 63 is covered with the covers 92-192-2 therefor. The operation of the sheet sorting apparatus 1 will now be described. Fig. 15 is a diagram describing signals inputted from the printer 2 into the sheet sorting apparatus 1, and signals outputted from the sheet sorting apparatus 1 to the printer 2. A processing demand signal inputted from the printer 2 into the sheet sorting apparatus 1 is a signal indicating that the printer 2 sends a sheet 3 to the sheet sorting apparatus 1. Tag width signals 1 ○, 2 ○ inputted from the printer 2 into the sheet sorting apparatus 1 are signals indicating that the pasting of the tag 4 on the sheet 3 is to be done or not, and designating a width of the tag 4. Tag pasting position signals 1 ○-4 ○ inputted from the printer 2 into the sheet sorting apparatus 1 are signals designating positions in which tags 4 are to be pasted on sheets 3. A roll end signal outputted from the sheet sorting apparatus 1 to the printer 2 is a signal indicating that the portion of the sheet rol15l which is in the vicinity of a terminal end thereof is detected. Jam signals 1 ○, 2 ○ outputted from the sheet sorting apparatus 1 to the printer 2 are signals indicting the condition of stopping of sheet in the sheet sorting apparatus 1. A flapper signal inputted from the printer 2 into the sheet sorting apparatus 1 is a signal designating the switching of the flapper 44. Fig. 16 is a diagram describing the timing of signals inputted from the printer 2 into the sheet sorting apparatus 1, and signals in the interior of the sheet sorting apparatus 1. Fig. 16 (A) is a diagram showing the variation of a processing demand signal. The processing demand signal falls at 500 ms before the sheet 3 has been sent from the printer 2 to the sheet sorting apparatus 1. The tag pasting signals 1 ○, 2 ○ shown in Fig. 16(B), tag pasting position signals 1 ○-4 ○ shown in Fig. 16(C) and flapper signal shown in Fig. 16(D) are read by the sheet sorting apparatus 1 at the time of fall of the processing demand signal. Fig. 16(E) is a diagram showing a front end detecting signal, i.e., an output signal from the limit switch 64 whereby the front edge of the sheet 3 varies when the lever 65 is operated. The front end detecting signal rises when the front edge of the sheet 3 has reached the tag pasting portion 11. Fig. 16 (F) is a diagram showing the variation of a motor operating signal outputted from the controller 66 of the sheet sorting apparatus 1 and controlling the rotation of the tacking action motor 61. The motor operating signal takes a value for forwardly rotating the tacking action motor 61 during a time tl from the time of fall of the processing demand signal to the time corresponding to the tag width signals 1 ○, 2 ○. The time tl for forwardly rotating the tacking action motor 61 is the time for drawing out the band tape 52 held between the draw-out rollers 53, 54, and the length of the time determines a width of the tag 4. Fig. 17 is a diagram describing the relation between the tag width signals 1 ○, 2 ○ and time t1. In this mode of embodiment, the printer 2 demands that a tag 4 of a width corresponding to the number of sheets handled in a printing job be pasted on a first sheet 3 subjected to the printing job. Namely, the printer 2 sets the tag width signal 1 ○ to H, and the tag width signal 2 ○ to L when the number of sheet handled in a printing job is 1. The printer 2 sets the tag width signal 1 ○ to L, and the tag width signal 2 ○ to H when the number of sheets handled in a printing job is 2-4, and the tag width signal 1 ○ to L, and the tag width signal 2 ○ to L when the number of sheets handled in a printing job is not less than 5. When the tag width signal 1 ○ is H with the tag width signal 2 ○ being L, the controller 66 of the sheet sorting apparatus 1 sets the width of the tag 4 to 5 mm, so that the time tl for forwardly rotating the tacking action motor 61 is set to 50 ms. The time corresponding to the tag width signals 1 ○, 2 ○ is stored in the interior of the controller 66 in advance. Similarly, the controller 66 sets the width of the tag 4 to 7 mm when the tag width signal 1 ○ is L with the tag width signal 2 ○ being H, so that it sets the time tl to 70 ms, and it sets the width of the tag 4 to 10 mm when the tag width signal 1 ○ is L with the tag width signal 2 ○ being L, so that it sets the time tl to 100 ms. The time t2 for reversely rotating the tacking action motor 61 is basically a fixed time for moving the upper edge 81 of the cutting portion 63 to the side of the band tape 52. During this time, the upper edge 81 cuts the band tape 52 to produce the tag 4. The time t3 from the rise of the front end detecting signal to the termination of the time t2 for reversely rotating the tacking action motor 61 is a time for determining the position for pasting the tag 4 on the sheet 3. The controller 66 determines the time t3 on the basis of the tag pasting position signals 1 ○-4 ○. The time t4 for forwardly rotating the tacking action motor 61 is a time (basically fixed time) for forwardly rotating a mechanical motor which is required at minimum for carrying out a series of pasting operations by moving the tag pasting belt 56 and transfer roller 59. The time t5 for reversely rotating the tacking action motor 61 is a basically fixed time for moving the upper edge 81 of the cutting portion 63 from the side of the band tape 52 to the original position. Fig. 16 (G) is a diagram showing the variation of a solenoid operating signal outputted from the controller 66 of the sheet sorting apparatus 1 and adapted to control the position of the flapper 44. When the solenoid operating signal is in an on-state, the transfer path of the sheet 3 is switched to the side of the sheet sorting apparatus 1. When the flapper signal shown in Fig. 16(D) is L at the time of fall of the processing demand signal, the controller 66 puts the solenoid operating signal in an on-state for a predetermined period of time in which the sheet 3 is transferred. As described above, the sheet sorting apparatus 1 draws a predetermined sheet 3 into the interior thereof, pastes a tag 4 of a predetermined width on a predetermined portion of the sheet 3 and discharges the sheet 3 onto a tray 12 for discharged sheet, on the basis of the signals outputted from the printer 2. Fig. 18 is a diagram describing sheets 3 having tags 4 pasted thereon, and stacked on the tray 12 for discharged sheet. The tag 4-1 has a width of 5 mm since the number of sheet subjected to a printing job is 1. Similarly, the tag 4-2 has a width of 7 mm since the number of sheets subjected to a printing job is 4, the tag 4-3 has a width of 5 mm since the number of sheet subjected to a printing job is 1, and the tag 4-4 has a width of 7 mm since the number of sheets subjected to a printing job is 2. The tags 4-1 to 4-4 are pasted on the portions designated by the printer 2 of the sheets 3. Fig. 19 is a flow chart describing the operation of the sheet sorting apparatus 1. In a step S11, the controller 66 of the sheet sorting apparatus 1 judges whether the fall of the processing demand signal is detected or not, and, when a judgement that the fall of the processing demand signal is not detected is given, the procedure returns to the step S11 to repeat the process until the processing command signal has fallen. When a judgement that the fall of the processing demand signal is detected is given in the step S11, the procedure advances to a step S12, and the controller 66 changes the position of the flapper 44 on the basis of a signal from the printer 2. In a step S13, the controller 66 forwardly rotates the tacking action motor 61 to have the draw-out rollers 53, 54 draw out the band tape 52 of a predetermined length. In a step S14, the controller 66 judges whether the front end detecting signal rises or not, and, when a judgement that the front end detecting signal does not rise is given, the procedure returns to the step S14, and the process is repeated until the front end detecting signal has risen. When a judgement that the front end detecting signal rises is given in the step S14, the procedure advances to a step S15, and the controller 66 reversely rotates the tacking action motor 61 after the lapse of a predetermined period of time based on the signal from the printer 2, to have the cutting portion 63 cut the band tape 52. In a step S16, the controller 66 forwardly rotates the tacking action motor 611 after the lapse of a predetermined period of time based on the signal from the printer 2, to have the tag pasting belt 56 and transfer roller 59 paste the tag 4 on the sheet 3. In a step S17, the controller 66 reversely rotates the tacking action motor 61 to return the upper edge 81 of the cutting portion 63 to the original position and finish the process. Thus, the sheet sorting apparatus 1 pastes the tag 4 on the sheet 3. Fig. 20 is a diagram describing another construction of the tag pasting portion 11. The same reference numerals are added to the parts identical with those shown in Fig. 3, and the descriptions thereof are omitted suitably. The eccentric cam 62 is rotated clockwise in the drawing when the tacking action motor 61 is reversely rotated. When the cutting portion 63 reaches an extreme right position or an extreme left position in the drawing, a stopper (not shown) stops the eccentric cam 62. Namely, even when the tacking action motor 61 is reversely rotated for a period of time longer than a predetermined period of time, the cutting portion 63 stops in the extreme right position or the extreme left position in the drawing. When the tacking action motor 61 is forwardly rotated, the stoppage of the eccentric cam 62 is ceased. A light intercepting plate 101 is fixed to the cutting portion 63, and moved in the lateral direction of the drawing in accordance with a movement of the cutting portion 63. A sensor 102 is a photoelectric switch adapted to output a signal corresponding to the movement of the light intercepting plate 101, i.e. the movement of the cutting portion 63. Fig. 21 is a diagram describing operations of the light intercepting plate 101 and the sensor 102. A light-emitting portion 102A of the sensor 102 emits predetermined light toward a light receiving portion 102B, and the light receiving portion 102B receives the light emitted by the light-emitting portion 102A. Fig. 21(A) is a diagram showing the positional relation between the light intercepting plate 101 and sensor 102 when the cutting portion 63 is moved rightward in Fig. 20, i.e., when the tag pasting portion 11 is in an initial condition. As shown in Fig. 21(A), when the light intercepting plate 101 screens the light emitted by the light-emitting portion 102A, i.e., when the light receiving portion 102B does not receive the light emitted by the light-emitting portion 102A, the sensor 102 supplies a predetermined signal to the controller 66. The condition in which the sensor 102 outputs a predetermined signal will hereinafter be referred to as the condition in which the sensor 102 is on. Fig. 21(B) is a diagram showing the positional relation between the light intercepting plate 101 and the sensor 102 with the cutting portion 63 moving leftward in Fig. 20, i.e., with the upper edge 81 cutting the band tape 52. As shown in Fig. 21(B), the light intercepting plate 101 does not screen the light emitted by the light-emitting portion 102A, and the light receiving portion 102B receives the light emitted by the light-emitting portion 102A, the sensor 102 supplying other signal to the controller 66. The condition in which the sensor 102 outputs other signal will hereinafter be referred to as the condition in which the sensor 102 is off. Thus, the sensor 102 of the tag pasting portion 11 shown in Fig. 20 outputs a signal which corresponds to the position of the cutting portion 63 to the controller 66. Fig. 22 is a diagram describing the construction of the storage box 67 of the tag pasting portion 11 shown in Fig. 20. The storage box 67 of the tag pasting portion 11 shown in Fig. 20 has a window lll formed of a transparent plastic or glass. A user can see an amount of tags 4, which are stored in the storage box 67 (not pasted on sheets 3), through the window lll. Fig. 23 is a diagram describing other construction of the storage box 67 of the tag pasting portion 11 shown in Fig. 20. A light-emitting portion 121 emits predetermined light toward a light receiving portion 122. The light receiving portion 122 outputs a predetermined signal to the controller 66 when it receives the light emitted by the light-emitting portion 121, i.e., when less than a predetermined amount of tags 4 are stored in the storage box 67, and other signal to the controller 66 when the light receiving portion 122 does not receive the light emitted by the light-emitting portion 121, i.e., when not less than a predetermined amount of tags 4 are stored in the storage box 67. Thus, the light receiving portion 122 outputs a signal corresponding to the amount of the tags 4 stored in the storage box 67 to the controller 66. The sheet sorting apparatus 1 can make a display or an action (for example, stop the operation of the sheet sorting apparatus 1 when not less than a predetermined amount of tags 4 are stored in the storage box 67) corresponding to the amount of the tags 4 stored in the storage box 67. The operation of the tag pasting portion 11 shown in Fig. 20 will now be described. Fig. 24 is a diagram describing an initial condition of the tag pasting portion 11 the operation of which has not yet been started. The tacking action motor 61 is stopped, and the cutting portion 63 is moved to a predetermined extreme right side position in the drawing. The transfer roller 60 to which the driving force of the sheet discharge roller 16 of the printer 2 is transmitted is rotated clockwise in the drawing. Since the cutting portion 63 is positioned on the right side in the drawing, the light intercepting plate 101 screens the light emitted by the light-emitting portion 102A of the sensor 102, so the sensor 102 is turned on. Fig. 25 is a diagram describing the condition of the tag pasting portion 11 corresponding to time t11 of Fig. 30 which will be described later. The tacking action motor 61 is forwardly rotated, and the draw-out rollers 53, 54, and the guide roller 58 and tag pasting belt 57 are rotated, the band tape 52 corresponding to the length of the time t11 being drawn out from the sheet rol15l in the upward direction of the drawing. The cutting portion 63 is not moved even when the tacking action motor 61 is forwardly rotated, so that the sensor 102 continues to be on. Fig. 26 is a diagram describing the condition of the tag pasting portion 11 corresponding to time t12 of Fig. 30. The tacking action motor 61 is reversely rotated to cause the eccentric cam 62 to be rotated clockwise in the drawing, and the cutting portion 63 to be moved leftward in the drawing. Since the cutting portion 63 is moved leftward in the drawing, the sensor 102 changes from an on-state to an off-state. The band tape 52 of a predetermined length held between the draw-out rollers 53, 54, and the guide roller 58 and tag pasting belt 57 is cut with the upper edge 81 of the cutting portion 63 to produce a tag 4 of a predetermined length. The driving pulley 55 and driven pulley 56 are generally rotated clockwise in the drawing around the driving pulley 55. Fig. 27 is a diagram describing the condition of the tag pasting portion 11 corresponding to time t13 of Fig. 30 which will be described later. The tacking action motor 61 is stopped at a predetermined time, and the turning of the tag pasting belt 57, driving pulley 55 and driven pulley 56 is stopped in a predetermined position in which the tag pasting belt 57 is pressed by the transfer roller 60. The tag 4 is transferred with the sheet 3 as it is pressed at a predetermined pressure by the transfer roller 60 and tag pasting belt 57, and pasted on the sheet 3. Since the cutting portion 63 is positioned on a right side portion of the drawing, the light intercepting plate 101 does not screen the light emitted by the light-emitting portion 102A of the sensor 102, so that the sensor 102 is off. Fig. 28 is a diagram describing the condition of the tag pasting portion 11 corresponding to time t15 of Fig. 30 which will be described later. The tacking action motor 61 is forwardly rotated, and the stoppage of the eccentric cam 62 is ceased. Even when the tacking action motor 61 is forwardly rotated, the cutting portion 63 is not moved, so that the sensor 102 continues to be off. Fig. 29 is a diagram describing the condition of the tag pasting portion 11 corresponding to time t15 of Fig. 30 which will be described later. The tacking action motor 61 is reversely rotated to cause the eccentric cam 62 to be rotated clockwise in the drawing, and the cutting portion 63 to be moved rightward in the drawing. Since the cutting portion 63 is moved rightward in the drawing, the sensor 102 changes from an off-state to an on-state. As described above, the tag pasting portion 11 is put in the condition shown in Figs. 24-29, in order repeatedly to paste the tag 4 of a predetermined length on a predetermined portion of the sheet 3. The variation of the motor operating signal supplied to the tacking action motor 61 when the tag pasting portion 11 shown in Fig. 20 performs the operations described in Figs. 24-29 will now be described with reference to a time chart of Fig. 30. The time t11 for forwardly rotating the tacking action motor 61 is a time in which the draw-out rollers 53, 54 draw out the band tape 52 as in the time t1 of Fig. 16(F), and the length thereof determines the width of the tag 4. The time t12 for reversely rotating the tacking action motor 61 is basically a time of a fixed length in which the upper edge 81 of the cutting portion 63 is moved toward the band tape 52 as in the time t2 of Fig. 16(F). During this time t12, the upper edge 81 cuts the band tape 52 to produce the tag 4. At the same time as the tag 4 is cut off, it is pasted on the sheet 3 by the belt 57 and roller 60. The time t13 for stopping the tacking action motor 61 may not be provided. When the time t13 is not provided, the tag pasting portion 11 is put in the condition shown in Fig. 27 for the time t14, and skips the condition corresponding to that of Fig. 28. The time t14 for forwardly rotating the tacking action motor 61 is the time for ceasing the stoppage of the eccentric cam 62. The time t15 for reversely rotating the tacking action motor 6l is a time, the length of which is equal to the time t12, for moving the upper edge 81 of the cutting portion 63 from the side of the band tape 52 to the original position. A process for returning the tag pasting portion 11 of Fig. 20 to the initial condition when the operation thereof is stopped halfway will now be described. When the tag pasting portion 11 in the condition shown in Fig. 26 is stopped with the sensor 102 turned off, the controller 66 outputs a motor operating signal shown in Fig. 31(A). Namely, the controller 66 rotates the tacking action motor 61 forward for a predetermined period of time t21, and reversely for a predetermined period of time t22, and further forward for a predetermined period of time t21, and reversely for a predetermined period of time t22. Owing to the forward rotation of the tacking action motor 6l during the first time t21 and the reverse rotation thereof during the first time t22, the eccentric cam 62 is turned until it has been stopped by a stopper, and the tag pasting portion 11 is put in the condition shown in Fig. 27. Owing to the forward rotation of the tacking action motor 61 during the second time t21 and the reverse rotation thereof during the second time t22, the tag pasting portion 11 returns to the initial condition shown in Fig. 24 via the condition shown in Fig. 28 and the condition shown in Fig. 29. When the tag pasting portion 11 is stopped (the sensor 102 is on) in the condition shown in Fig. 25, or in the condition shown in Fig. 26 with the sensor 102 on, the controller 66 outputs the motor operating signal shown in Fig. 31(B). Namely, the controller 66 rotates the tacking action motor 61 reversely for a predetermined period of time t22, forward for a predetermined period of time t21, and reversely for a predetermined period of time t22. Owing to the reverse rotation of the tacking action motor 61 during the first time t22, the eccentric cam 62 is rotated until it has been stopped by the stopper, and the tag pasting portion 11 is put in the condition shown in Fig. 27. Owing to the subsequent forward rotation of the tacking action motor 61 during the time t21 and reverse rotation thereof during the time t22, the tag pasting portion 11 returns to the initial condition shown in Fig. 24 via the condition shown in Fig. 28 and the condition shown in Fig. 29. When the tag pasting portion 11 is stopped in the condition shown in Fig. 27 (the sensor 102 is off), and in the condition shown in Fig. 28 (the sensor 102 is off), or in the condition shown in Fig. 29 with the sensor 102 off, the controller 66 outputs the motor operating signal shown in Fig. 31(C). Namely, the controller 66 rotates the tacking action motor 61 forward for a predetermined period of time t21, and reversely for a predetermined period of time t22. Owing to the forward rotation of the tacking action motor 61 during the first time t21, the stoppage of the eccentric cam 62 is ceased. Owing to the reverse rotation of the tacking action motor 61 during the later time t22, the cutting portion 63 is moved to an extreme right side in Fig. 20 until the eccentric cam 62 has been stopped by the stopper, and the tag pasting portion 11 returns to the initial condition shown in Fig. 24. When the tag pasting portion 11 is stopped in the condition shown in Fig. 24 (the sensor 102 is on), or it is stopped in the condition shown in Fig. 29 with the sensor 102 is on, the controller 66 outputs the motor operating signal shown in Fig. 31(D). Namely, the controller 66 reversely rotates the tacking action motor 61 for a predetermined period of time t22. Owing to the reverse rotation of the tacking action motor 61 during the time t22, the cutting portion 63 is moved to the extreme right side in Fig. 20, and the eccentric cam 62 is stopped by the stopper, the tag pasting portion 11 returning to the initial condition shown in Fig. 24. A process for returning the tag pasting portion 11 will now be described with reference to a flow chart of Fig. 32. In a step S31, the controller 66 judges whether the sensor 102 is on or not, and, when a judgement that the sensor 102 is on is given, the procedure advances to a step S32 to reversely rotate the tacking action motor 61 for a period of time t22. In a step S33, the controller 66 judges whether the sensor 102 is on or not, and, when a judgement that the sensor 102 is on is given, the process is finished. When a judgement that the sensor 102 is off is given in the step S31 with a judgement that the sensor 102 is off given in the step S33, the procedure advances to a step S34, and the controller 66 forwardly rotates the tacking action motor 61 for the time t21, and the procedure advances to the step S32. As described above, even when the tag pasting portion 11 is stopped in any condition on the basis of only the output from the sensor 102, the tag pasting portion 11 can be returned simply to the initial condition. Figs. 33 and 34 are diagrams showing the construction of other modes of embodiments of the sheet sorting apparatus 1. The sheet sorting apparatus 1 of Fig. 33 has a plurality of trays 121-12-3 and a plurality of flappers 44-144-3, and a tag pasting portion 11 pastes a tag 4 on a sheet 3 discharged onto the tray 121. The sheet sorting apparatus 1 of Fig. 34 also has a plurality of trays 121-12-3 and a plurality of flappers 44-144-3, and the tag pasting portion 11 pastes tags 4 on sheets discharged onto the trays 121-12-3. When the pasting of tags 4 on sheets by the tag pasting portion 11 enables the sheets to be classified into eight kinds of sheets, the sheet sorting apparatus 1 and printer 2 of Fig. 33 are capable of sorting sheets into eleven kinds of sheets. When the same tag pasting portion 11 is used, the sheet sorting apparatus 1 and printer 2 of Fig. 34 are capable of sorting sheets into twenty-five kinds of sheets. Thus, the structures of the modes of embodiments of Figs. 33 and 34 are suitable to sort sheets 3 into a multiplicity of kinds of sheets. In this specification, embodiments in which the width of the tags 4 is varied depending upon the number of sheets subjected to a printing job of the printer 2 are described. The width of the tags 4 may also be varied by sending to the sheet sorting apparatus 1 signals according to the quality (for example, high-quality sheet, regenerated sheet and coated sheet) of the sheets 3. According to the sheet sorting apparatus defined in Claim 1, the change-over means switches a path, in which a sheet is transferred, to either a first path in which a tag is pasted on the sheet or a second path in which a tag is not pasted thereon, the draw-out means draws out a band tape coated at one side edge portion thereof with a pressure sensitive adhesive, the cutting means prepares the tag by cutting a predetermined portion of the band tape, the pasting means introduces the prepared tag to a predetermined position with respect to the sheet, holds the tag from both sides thereof with a part thereof superposed on the sheet and pasting the tag on the sheet, the receiving means receives the sheet on which the tag is pasted by the pasting means, and the control means controls the movements of the change-over means, draw-out means and cutting means. Therefore, the sheets can be classified easily and reliably.

Claims: A sheet sorting apparatus 1 installed on a sheet discharge side of an image processing apparatus and adapted to paste a tag 4 on a predetermined sheet 3 discharged from said image processing apparatus, comprising: a change-over means 44 for switching a path, in which said sheet 3 is transferred, to either a first path in which said tag 4 is pasted on said sheet 3 or a second path in which said tag 4 is not pasted on said sheet 3, a draw-out means 53, 54 for drawing out a band tape 52 coated at one side edge portion thereof with a pressure sensitive adhesive, a cutting means 63 for preparing said tag 4 by cutting said band tape 52 at a predetermined portion thereof, a pasting means 57,60 for introducing said prepared tag 4 to a predetermined position with respect to said sheet 3, holding said tag 4 from both sides thereof with a part thereof superposed on said sheet 3, and pasting said tag 4 on said sheet 3, a receiving means 12 or receiving said sheet 3, on which said tag 4 is pasted by said pasting means 57, 60, and a control means 66 for controlling movements of said change-over means 44, said draw-out means 53, 54 and said cutting means 63. A sheet sorting apparatus 1 according to Claim 1, wherein said sorting apparatus further includes a means for transferring said sheet by utilizing a driving force of said image processing apparatus. A sheet sorting apparatus 1 according to Claim 1 or 2, wherein said control means 66 is adapted to vary a width of said tag 4 by controlling a movement of said cutting means 63. A sheet sorting apparatus 1 according to any one of Claims 1 to 3, wherein said draw-out means 53,54 and said cutting means 63 are driven by the same motor. A sheet sorting apparatus 1 according to any one of Claims 1 to 4, wherein said sorting apparatus further includes a detecting means for detecting the condition of a movement of said cutting means 63. A sheet sorting apparatus 1 according to any one of Claims 1 to 5, wherein said sorting apparatus further includes a storage means 67 for storing said tag 4 not pasted on said sheet 3. A sheet sorting apparatus 1 according to Claim 6, wherein said sorting apparatus further includes a storage detecting means for detecting an amount of said tags stored in said storage means 67.

Inventors: OHMAE KOICHI, SHIMAO TETSURO, OHMAE, KOICHI, SHIMAO, TETSURO
Applicants: OMRON TATEISI ELECTRONICS CO, OMRON CORPORATION
Application year: 1999
Main classification: B65H33
IPC codes: B65H35, B65H39, B65H33, B65H29