Variable sheet sets stapling and registration positions system

Abstract: An on-line printed sheets output handling system (10) for printed sheets sequentially output by a reproduction system is described herein, in which the printed sheets are registered in neatly superposed sets which are optionally fastened together by finishing apparatus (14, 18). At least a portion (18) of the finishing apparatus is laterally repositionable to provide variable set finishing. A lateral registration system (20) for the printed sheets output is repositionable with the portion of the finishing apparatus (18), and has a sheet registration member (22) engaging and laterally registering the printed sheets to selectable variable lateral sheet registration positions. A registration disengagement system (24) is also provided for moving the sheet registration member (22) out of registration engagement with the sheets after a set of sheets has been laterally compiled and before the finishing apparatus (18) is laterally repositioned. The finishing apparatus (14, 18) comprises two staplers, one stapler (14) being fixed, and the other stapler (18) being laterally repositionable and carries the sheet registration member (22) of the lateral registration system (20).

Description: The present invention relates to a variable sheet sets stapling and registration positions system, which is flexible or adaptable for different sizes of printed sheets and different desired stapling or other set finishing positions. Single stapler integral disk stacker units are described in US-A-5 409 202 and US-A-5 409 201 which have three sheet inverting disks rather than two, and may be referred to for exemplary ancillary details of a disk stacker with stapler and lateral edge tamping arrangement. In the described units, only one stapler needs to have any movement or movement hardware or software, regardless of sheet size variations. Two or more staplers and lateral drives for moving either of the staplers selectably at the output of a reproduction apparatus to provide different set stapling positions is also known, for example, the Xerox Corporation "9900" duplicator - finisher, US-A-4 516 714 and published Japanese patent application JP 07-69640-B4. Process direction registration members movable with or by a stapling head are described in US-A-5 398 918 and US-A-5 443 249. Some copiers have begun to offer on-line hole punching of the sheets during or immediately after the printing process in the copier, so that conventional unpunched blank copy sheet stock may be utilized, yet provide appropriately punched print jobs in the output. Such copiers are suggested in, for example, US-A-4 819 021, US-A-4 575 296, US-A-4 763 167, US-A-5 508 799, and US-A-4 988 030. These references also note that on-line hole punching can be provided with or without stapling or other set binding in addition thereto. In accordance with the present invention, there is provided an on-line printed sheets sets output handling system for printed sheets sequentially outputted by a reproduction system, the system comprising:- a sheet lateral registration system having a sheet registration member for engaging and laterally registering the printed sheets for registration and compiling; and finishing apparatus for fastening together printed sheets which have been registered and compiled in neatly superposed sets; characterised in that at least a portion of the finishing apparatus is laterally repositionable by a lateral movement repositioning system to provide variable set finishing; and in that the lateral repositioning system moves the sheet registration member to selectable variable lateral sheet registration positions. This embodiment can provide automatically variable sheet lateral registration by a system which is integral with the repositioning of at least one of the stapler units. Thus, the same lateral movement mounting system and servo or stepper motor drive for repositioning the repositionable stapler unit can also provide for repositioning the lateral stacking registration member. In this embodiment, as shown, a variable, plural positions, stapling system and a variable set registration position system may also be integral a sheet inverting disk stacker finisher module. The disclosed embodiments may be alternatively usable in a system of on-line selectable hole punching or other finishing of printed sheets of paper or the like being outputted by a copier or printer, which could also be simple, low cost, and compact, and likewise can be integrated within the existing space of an inverter/stacker type sheet output system. Further advantages of the disclosed embodiment, as will be apparent, include ease of tech rep, operator or user adjustability of the position and/or number of finishing positions in the sheet, as well as automatic features as disclosed. It will also be appreciated that the ability to utilize the various advantages of the existing disk stacker/inverter components is one of the advantages of the disclosed embodiment. The sheet lateral registration system may have a registration disengagement system for moving said sheet registration member out of registration engagement with said sheets after a set of sheets has been laterally compiled and before said finishing system is laterally repositioned by said finisher lateral movement repositioning system. The finishing system may comprise two staplers, one of which is fixed, and the other of which is repositionable by being mounted for lateral movement by said finisher lateral movement repositioning system; and wherein said lateral registration system is operably connected to move laterally with said repositionable stapler. The finishing system provides a selection between single corner stapling of the set and correctly spaced dual stapling of the set, and wherein said sheet registration member of said lateral registration system is closely spaced from said laterally repositionable stapler by a distance providing correct set registration for said corner stapling; and wherein said sheet lateral registration system has a registration disengagement system for moving said sheet registration member out of registration engagement with said sheets after a set of sheets has been laterally compiled thereagainst and before said repositionable stapler is laterally repositioned by said finisher lateral movement repositioning system into said dual stapling position. Advantageously, a sheet tamping system for tamping the opposing lateral edge of a sheet being laterally registered against said sheet registration member of said lateral registration system is also provided. The system may further comprise a rotatable disks type sheet inverter and stacker, in which the printed sheets being outputted are individually rotated for inversion before being released for stacking while being at least partially held in said rotatable disks; wherein said lateral registration system sheet registration member laterally registers said printed sheets individually as said sheet is being at least partially held and rotated by said disks; and further including a tamping system for tamping the laterally opposing edge of the sheet being laterally registered towards said sheet registration member while said sheet is being at least partially held and rotated by said disks. The disclosed system may be operated and controlled by appropriate operation of conventional control systems. It is well known and preferable to program and execute imaging, printing, paper handling, and other control functions and logic with software instructions for conventional or general purpose microprocessors, as is well-known. Such programming or software may of course vary depending on the particular functions, software type, and microprocessor or other computer system utilized, but will be available to, or readily programmable without undue experimentation from, functional descriptions, such as those provided herein, and/or prior knowledge of functions which are conventional, together with general knowledge in the software and computer arts. Alternatively, the disclosed control system or method may be implemented partially or fully in hardware, using standard logic circuits or single chip VLSI designs. Conventional sheet path sensors or switches connected to the controller may be utilized for sensing, counting, and timing the positions of sheets in the sheet paths, and thereby also controlling the operation of sheet feeders and inverters, etc., as is well known in the art. As to specific components of the subject apparatus, or alternatives therefor, it will be appreciated that, as is normally the case, some such components are known per se in other apparatus or applications which may be additionally or alternatively used herein. The present invention will be better understood, by way of example only, from the following description of a specific embodiment and reference to the accompanying drawing figures wherein: Fig. 1 is a schematic side view of one example of an integral variable stapling and registration system integral an inverter/stacker output system, at the output of a sheet printing system; Fig. 2 is a schematic end view of the system of Fig. 1; Fig. 3 shows in a partial top view the stapling and registration positions for corner stapling for the system of Figs. 1 and 2 for an exemplary sheet set; Fig. 4 shows a similar top view with a different registration position for dual stapling on a set of sheets; and Fig. 5 is similar to the view of Fig. 4, showing the exemplary dual stapling positions. As noted, in this illustrated example, an output sheets stacker-finisher module system 10 is shown in Figs. 1 and 2 which is similar to that described in US-A-5 409 202 or US-A-5 409 201. That is, a disk stacker 12 with rotatable disks like 12a and 12b for sequentially receiving in their slots 12c and 12d, and inverting by their rotation, the sheets from a printer or copier output path 13. As described there, a sheet enters the disks 12a and 12b via input feed nips (not shown). The disks 12a, 12b then accelerate to process speed just as the sheet buckles in the disk slots 12c and 12d. This is timed from a sensor. The disks 12a, 12b then rotate together to escort the sheet to the registration edge in the process direction. The sheet is deskewed and registered in the process direction, and also is tamped laterally into lateral registration. The disks 12a, 12b then accelerate around to their next home position and stop, awaiting the next sheet. The next sheet then enters, as previously described. These steps are repeated until a full set of sheets is compiled, and then the compiled set is stapled. The process direction (inside) registration edge is then actuated to push the set all of the way out on to the elevator stacking tray. A hold down finger assist may be laid on top of the previously ejected stacked sets during this last step. US-A-5 409 202 and US-A-5 409 201 also show and describe one integral fixed position stapler such as 14 here and a lateral edge tamping system generally such as 16 here, which thus need not be redescribed herein. However, it may be seen that here the fixed stapler 14 is in a different position, and that here there is a variable dual stapler system, with another laterally repositionable stapler 18 to allow either corner stapling or dual position edge stapling or no stapling. Also, here there are only two centrally located but spaced apart sheet inverter disks 12a and 12b in this dual stapler system. (Only two disks are needed by using a center registered type output 13 and/or reproduction machine, in which all sheets are outputted centrally, regardless of size.) One of the two staplers, 14 here, is a fixed position stapler mounted in a fixed position between these two central disks 12a and 12b. The other stapler 18 is outside of and to the left of the two disks (towards the front of the module). This second stapler unit 18 is a unit movable laterally of the sheet output path, preferably automatically laterally repositionable by a servo system 19 along a mounting track, so as to provide either proper position corner stapling or a second side staple in the proper position for output sheet sets of various sizes. In this disclosed system, only this one stapler 18 needs to have any movement, movement hardware or software, regardless of sheet size variations. Here there is also a novel variable lateral stapling sheets end position registration system 20 which is compatible with the variable tamping system 16, which registration system 20 is integrally associated with this second stapler unit 18 and movable (laterally resettable) therewith. The second stapler 18, which is movable, is integral a moving mechanism which has an integral retractable side registration edge or finger 22 for registering sheets prior to stapling. This registration edge 22 works in conjunction with tamping mechanism 16 to accomplish cross-process registration. Each sheet here is tamped against registration finger 22. The movable stapler 18 and the side registration edge 22 are positioned based on paper size and stapling mode via a servo or stepper motor system such as 19. They are repositioned as required for the dual stapling mode and for paper size changes between sets. The registration finger 22 thereof is mounted a small fixed distance laterally outside of the jaws of the second, movable, stapler 18. When corner stapling is selected, as in Fig. 3, the preset spacing distance 23 between the finger 22 and the stapling position outside edge (e.g., 6 mm) provides the proper spacing for proper corner stapling from the registered edge of the compiled set of sheets with this second stapler 18, irrespective of the stapler 18 position or the sheet size, e.g., paper width 25 here. The dot-dashed line at the right side of Fig. 3 illustrates the nominal edge position of that side of the sheet upon its entry by the disks before tamper 16 tamps, as shown by its movement arrow. The solid line positions show the sheet edges after tamping. For single, corner, stapling, and for unstapled stacking, the stapler mechanism 18 and its integrated retractable side registration edge 22 is positioned based on the paper path centerline and the paper width. When the second stapler 18 is to be instead used together with stapler 14 in a dual staples edge stapling mode instead of single corner stapling, the set is registered as shown in Fig. 4, and then as shown in Fig. 5, the stapler unit 18 is desirably moved in to approximately 25% of the sheet lateral dimension in from the lateral edge registration position of the sheets by stepper or servo motor system 19. For this two staples mode, before this lateral stapler 18 movement, a solenoid 24 (Figs. 1 and 2) lifts this fixed registration edge finger 22 up out of the way of all the sheets. The second stapler 18 can then be moved laterally toward the first stapler into the proper position for said dual edge stapling, as shown in Fig. 5, without disturbing the set with the registration finger 22 (shown in phantom in Fig. 5 where it is lifted out of the way). However, the finger 22 is only so moved up out of its sheet registration position after the full set of the sheets to be stapled together have all been compiled and tamper 16 registered against this registration finger 22, just as for corner stapling above, but in the position shown in Fig. 4. The tamper 16, which tamps the opposite edge of the sheet from said lateral registration edge finger 22 towards that finger 22, is adapted to accommodate various sizes of sheets and to tamp each incoming sheet against this registration finger 22, without overtamping force. This is preferably done while each sheet is still being at least partially supported in the disk slots 12c and 12d, as described above in relation to US-A-5 409 202 and US-A-5 409 201. To express this in other words, this retractable side registration edge mechanism 20 is attached to the moving stapler 18 frame. The registration edge 22 is appropriately located with respect to the proper staple position for single stapling. For dual stapling, the registration edge is differently positioned for proper cross-process registration for that mode. The registration location varies with paper size and is based on the desired second staple position. The stapler 18 is then repositioned, after the set has been compiled, for the dual stapling function by 1/4 of the paper width 25. To reexpress this, for dual stapling, the movable stapler 18 with the retractable side registration edge 22 is initially positioned based on the location of the fixed stapler 14 and based on the paper width 25. The registration edge 22 is initially positioned at 3/4 of the paper width from the centerline of the fixed stapler 14, as shown in Fig. 4. In both modes, the stapling function occurs after the tamping function is completed for the last sheet of a set. The stapler cycle is initiated after the last tamp is complete and preferably just after a safety guard is put in place. The stapler(s) drive the staple in the set edge and then the set is ejected. For dual stapling, the stapler function may differ slightly. After the tamping function is completed for the last sheet of the set, the fixed stapler 14 cycle is initiated just after its safety guard is in place. The retractable side registration edge 22 is lifted out of the way just after the fixed stapler 14 cycle has started. The movable stapler 18 is then repositioned to the proper stapling position. Then its stapling cycle is initiated just after its safety guard is in place. The set is then ejected. It may be seen that the same lateral movement and mounting system for this second stapler unit also provides for lateral positioning of the stacking registration finger 22. That is, the second stapler unit 18 with its integral registration finger 22 may be initially positioned in the desired edge registration system 20 position by stepper system 19 for the particular sheet size of the set. This set registration positioning may be automatic, from information provided by the printer controller and/or sensors in its sheet output or the module 10 input. The same servo drive 19 for this second stapler unit 18 thus also provides for servo positioning of the lateral stacking position controlling registration finger 22. That is, the second stapler unit 18 with its integral registration finger is positioned for the desired edge registration position for stacking that set. Then, if stapling elsewhere than that set's corner is desired, the same movement mechanism can reposition the same stapling unit elsewhere relative to the set, after lifting finger 22 out of the way by solenoid 24. With this system, only one stapler 18 needs any movement or movement hardware or software, regardless of sheet size variations. The other stapler 14 can remain fixed. Yet, the stapling positions of both staplers relative to the set can be varied widely, by resetting the finger 22 registration position during compiling of the set, and/or resetting the (independent) stapling position of the movable stapler 18. The present system is also usable for and compatible with alternate sets partial offsetting, by different lateral registration compiling positions, which is well known in sheet output systems, as described, for example, in US-A-5 501 442 which shows an integral dual mode set tamping or set offsetting system. Although the above is described using as an example the disk stacker of US-A-5 409 202, it will be appreciated that this is merely one example and that other stackers, tampers, and registration systems are known. While the embodiment disclosed herein is preferred, it will be appreciated from this teaching that various alternatives, modifications, variations or improvements therein may be made by those skilled in the art, which are intended to be encompassed by the following claims:

Claims: An on-line printed sheets sets output handling system (10) for printed sheets sequentially outputted by a reproduction system, the system comprising:- a sheet lateral registration system (20) having a sheet registration member (22) for engaging and laterally registering the printed sheets for registration and compiling; and finishing apparatus (14, 18) for fastening together printed sheets which have been registered and compiled in neatly superposed sets; wherein at least a portion of the finishing apparatus (14, 18) is laterally repositionable by a lateral movement repositioning system (19) to provide variable set finishing; and in that the lateral repositioning system (19) is adapted to move the sheet registration member (22) to selectable variable lateral sheet registration positions. A system according to claim 1, wherein the sheet lateral registration system (20) has a registration disengagement system (24) for moving the sheet registration member (22) out of registration engagement with a set of sheets after it has been laterally compiled and before the finishing apparatus is laterally repositioned by the lateral movement repositioning system (19). A system system according to claim 1 or 2, including a sheet tamping system (16) for tamping the opposing lateral edge of a sheet being laterally registered against the sheet registration member (22) of the sheet lateral registration system (20). A system according to claim 1, wherein the finishing apparatus comprises two staplers (14, 18), one stapler (14) being fixed, and the other stapler (18) being repositionable by being mounted for lateral movement by the lateral movement repositioning system (19), and is operably connected to move laterally therewith. A system according to claim 4, wherein the sheet registration member (22) of the sheet lateral registration system (20) is closely spaced from the repositionable stapler (18) by a distance providing correct set registration for said corner stapling. A system according to claim 5, wherein the sheet lateral registration system (20) has a registration disengagement system (24) for moving the sheet registration member (22) out of registration engagement with a set of sheets after it has been laterally compiled thereagainst and before the repositionable stapler (18) is laterally repositioned by the lateral movement repositioning system (19) into a dual stapling position. A system according to claim 1, further comprising a rotatable disks type sheet inverter and stacker (12), in which the printed sheets being outputted are individually rotated for inversion before being released for stacking while being at least partially held in rotatable disks (12a, 12b), the sheet lateral registration member (22) laterally registering each printed sheet as it is being at least partially held and rotated by the disks (12a, 12b). A system according to claim 7, further including a tamping system (16) for tamping the laterally opposing edge of the sheet being laterally registered towards the sheet registration member (22) while it is being at least partially held and rotated by the disks (12a, 12b). A system according to claim 7 or 8, wherein the finishing apparatus comprises two staplers (14, 18), one stapler (14) being mounted in a fixed position between the disks (12a, 12b), and the other stapler (18) being repositionable by being mounted laterally outside of the disks (12a, 12b) for lateral movement by the lateral movement repositioning system (19), and is operably connected to automatically move laterally therewith.

Inventors: CIPOLLA STEPHEN D, FERRARA JOSEPH J, KRAMER WILLIAM E, NARAMORE RAYMOND A, ROLPH L JAMES, CIPOLLA, STEPHEN D., FERRARA, JOSEPH J., KRAMER, WILLIAM E., NARAMORE, RAYMOND A., ROLPH, L. JAMES
Applicants: XEROX CORP, XEROX CORPORATION
Application year: 1997
Main classification: B42B4
IPC codes: B42C1, B65H9, B65H37