EP0013164B1 - Drahtheftvorrichtungen und Verfahren zum Binden von Blattstapeln - Google Patents

Drahtheftvorrichtungen und Verfahren zum Binden von Blattstapeln Download PDF

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Publication number
EP0013164B1
EP0013164B1 EP19790303015 EP79303015A EP0013164B1 EP 0013164 B1 EP0013164 B1 EP 0013164B1 EP 19790303015 EP19790303015 EP 19790303015 EP 79303015 A EP79303015 A EP 79303015A EP 0013164 B1 EP0013164 B1 EP 0013164B1
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EP
European Patent Office
Prior art keywords
wire
cutter
thickness
advancing
gripper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19790303015
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English (en)
French (fr)
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EP0013164A1 (de
Inventor
Attila Arpad Fogarasy
Fred Marshall
Michael John Lovibond
Ronald Edward Stokes
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Xerox Corp
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Xerox Corp
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Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of EP0013164A1 publication Critical patent/EP0013164A1/de
Application granted granted Critical
Publication of EP0013164B1 publication Critical patent/EP0013164B1/de
Expired legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/06Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor without provision for bending the ends of the staples on to the work
    • B25C5/08Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor without provision for bending the ends of the staples on to the work with means for forming the staples in the tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42BPERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B4/00Permanently attaching together sheets, quires or signatures by discontinuous stitching with filamentary material, e.g. wire

Definitions

  • This invention relates to wire stitchers, particularly for binding sets or signatures of sheets or documents, and to methods of binding sets of sheets.
  • Stitchers take various well-known forms. There are those (called staplers) which use pre-formed staples, those using precut lengths of wire which are formed in the machine and those in which the staples are formed from a continuous wire wound on a spool from which pieces are cut and formed in the machine. In each case the legs of the formed staple or stitch are driven through the set until the crown of the staple lies against one face of the set and the ends of the staple legs are bent over against the opposite face of the set to form clinches.
  • the present invention is concerned with wire stitchers including a cutter for cutting a length of wire from a supply thereof and a stitcher head for forming and driving the length of cut wire for binding a set of sheets.
  • the stitcher is capable of accommodating sets of varying thickness it is desirable to have some means of . adjusting the length of wire used for forming the stitch and although it is possible to accommodate varying set thicknesses by permitting the clinches to vary according to the thickness of the set, even to the extent in some cases of angling the clinches so that they overlap for very thin sets, this imposes limits on the capacity of the machine and is also aesthetically undesirable.
  • machines are available in which the length of wire cut to form the stitch may be varied, but in order to achieve such variation it has been necessary to stop the machine in order to perform an accurate and usually intricate manual adjustment requiring a skilled operator.
  • a wire stitcher according to the preamble of claims 1 and 7 including a movable cutter for cutting a length of wire from a supply thereof and a stitcher head for forming and driving the length of cut wire for binding a set of sheets, the length of cut wire presented by the stitching head being automatically determined by advancing the wire by a distance dependent upon the thickness of the set and positioning the cutter in dependence upon the thickness of the set.
  • a movable cutter for cutting a length of wire from a supply thereof
  • a stitcher head for forming and driving the length of cut wire for binding a set of sheets
  • the length of cut wire presented by the stitching head being automatically determined by advancing the wire by a distance dependent upon the thickness of the set and positioning the cutter in dependence upon the thickness of the set.
  • a wire stitcher is characterised in that the cutter has a rest position and the end of the wire supply is advanced past the rest position of the cutter by a distance dependent upon the set thickness and the cutter is retracted by a distance dependent upon the set thickness.
  • the wire is advanced past the normal or rest position of the cutter by a distance made up of a constant (crown length plus twice clinch length) plus the set thickness and the cutter is retracted from the rest position by a distance equal to the set thickness.
  • a constant may instead include twice the minimum set thickness in which case the cutter will be retracted, in all cases except for a minimum thickness set, by the set thickness minus the minimum set thickness. This latter arrangement avoids the need to move the cutter when binding minimum thickness sets. In each case a cut wire of the required length is obtained which is automatically centred on the head.
  • inhibitor means which is automatically adjusted in dependence upon set thickness and acts as a stop for the cutter and for a gripper device by which the wire is advanced.
  • the wire gripper and the cutter may each have angled faces which engage with correspondingly angled faces respectively of an inhibitor member which is moved at right angles to the wire advancing direction.
  • the gripper device and the cutter are advantageously biassed towards each other and driven by a common drive member, suitably in the form of a cam having opposite faces acting on the gripper and cutter respectively.
  • the wire is conventionally fed to a stitcher head via a dancer which maintains a controlled tension in the wire and it is therefore necessary to arrange for the wire to be continuously gripped at the head.
  • This is most conveniently achieved in accordance with a preferred feature of the invention by means of wire gripper or diodes incorporated in the gripper device and a cutter member by each of which the wire is gripped only against relative movement in the direction opposite the wire advancing direction.
  • the invention is characterised by first means for advancing the wire through a fixed distance past the cutter and second means for further advancing the wire and positioning the cutter in dependence upon the thickness of the set.
  • the wire is advanced by the first means past a normal or rest position of the cutter by a fixed distance (crown length plus twice clinch length) and thereafter the wire is advanced by the second means by a distance equal to the set thickness and the cutter is retracted from the rest position by a distance equal to the set thickness.
  • the constant may instead include twice the minimum set thickness in which case, in all cases except for a minimum thickness set, the wire will be advanced by the second means by a distance equal to the set thickness minus the minimum set thickness and the cutter will be retracted by the set thickness minus the minimum set thickness.
  • This latter arrangement avoids the need to move the second means and the cutter at all when binding minimum thickness sets. In each case a cut wire of the required length is obtained which is automatically centred on the head.
  • the stitcher includes a first wire gripper for advancing the wire past the cutter by said fixed distance and a second wire gripper for further advancing the wire by a distance dependent upon the thickness of the set, a third wire gripper being associated with the cutter for gripping the wire during retraction of the first and second wire grippers. Movement of the second wire gripper and the cutter is controlled by an actuator positioned in dependence upon set thickness.
  • the second wire gripper and the cutter are interconnected for equal and opposite movements along the wire paths e.g. by being slideably mounted and respectively connected to different ones of a pair of racks arranged to be driven by a common pinion in opposite directions, the pinion being rotatable by the actuator proportionately to the set thickness.
  • the first means drives a wire gripper to advance the wire by said fixed distance and the second means drives the wire gripper by said further distance and retracts the cutter.
  • a feed block is arranged to be driven through a fixed distance for advancing the wire by said fixed distance and the wire gripper is slideably mounted on the feed block for further advancing the wire in dependence upon set thickness.
  • a stitcher according to this invention may be incorporated in a sheet stitcher/compiler as part of a finisher for a photocopier and such a finisher may form part of the photocopier or take the form of a separate unit.
  • the invention provides methods of binding a set of sheets in which in accordance with FR-A-651 636 above a piece of wire is cut from a supply of wire and formed and driven through a said set to bind the sheets together, the length of said piece of wire being determined automatically in dependence upon the thickness of said set of sheets by advancing the wire by a distance dependent upon the thickness of the set and positioning a wire cutter in dependence upon the thickness of the set.
  • a method of this invention is characterised by advancing the wire past a rest position of a movable cutter by a distance dependent upon the set thickness and retracting the cutter by a distance dependent upon the set thickness.
  • a method of this invention is characterised in that the length of said piece of wire is determined automatically in dependence upon the thickness of said set of sheets by first advancing the wire by a fixed distance and then further advancing the wire by a distance dependent upon the thickness of the set and positioning a wire cutter in dependence upon the thickness of the set.
  • FIG. 1 there is shown an automatic xerographic reproducing machine 10 having a finisher 70 incorporating a stitcher 100 according to this invention.
  • the copying machine 10 is capable of producing either simplex or duplex copies in sets from a wide variety of originals which may be advanced in recirculating fashion by recirculating document apparatus 12 described in US-A-3556512.
  • the apparatus generally designated 100 is equally well adapted for use with any number of devices in which cut sheets of material are delivered or compiled in a set or stack.
  • the processor 10 includes a photosensitive drum 15 which is rotated in the direction indicated so as to pass sequentially through a series of xerographic processing stations: a charging station A, an imaging station B, a developer station C, a transfer station D and a clearing station E.
  • a document to be reproduced is transported by document handling apparatus 12 from the bottom of a stack to a platen 18 and scanned by means of a moving optical scanning system to produce a flowing light image on the drum at B.
  • Cut sheets of paper are moved into the transfer station D from sheet registering apparatus 34 in synchronous relation with the image on the drum surface.
  • the copy sheet is stripped from the drum surface and directed to a fusing station F.
  • the fixed copy sheet is passed through a curvilinear sheet guide system, generally referred to as 49, incorporating advancing rolls 50 and 51. The advancing rolls forward the sheet through a linear sheet guide system 52 and to a second pair of advancing rollers 53 and 54.
  • the simplex copy sheet is either forwarded directly to the finisher 70 via pinch rolls 61, 62 or into upper supply tray 55 by means of a movable sheet guide 56 before the finishing apparatus for the duplexed copy.
  • Movable sheet guide 56, and associated advancing rolls are prepositioned by appropriate machine logic system to direct the individual sheets into the desired path.
  • the finisher 70 comprises a tray 71 having a base or support surface 72 inclined downwardly in the direction of sheet travel towards a registration corner defined by registration fences 74, 75 extending along the lower edge and one side of the tray. Above the upper end of the support surface is arranged a pair of coacting sheet feed rolls 64, 65 arranged to receive sheets fed along path 63 by pinch rolls 61, 62. From the feed rolls 64, 65, a sheet is directed by guide throat 78 towards the tray 71.
  • a corner registration device 79 such as a paddle wheel like that described in US-A-3669447 is arranged over the surface 72 to urge the sheets S into the registration corner to position them for receiving a stitch from the apparatus 100.
  • the registration fence 74 is rotatable about an axis 74a so that it may be retracted for ejection of bound sets SS into a collection tray 69. Any suitable ejection mechanism, such as drive rollers, may be employed.
  • the stitcher 100 comprises a stitcher head 101, a reel 102 ( Figure 1) from which wire W is supplied via a dancer (not shown) to the head 101 and an active clincher 201.
  • the head 101 includes a wire advancing and cutting mechanism generally indicated at 103 for presenting lengths of cut wire to the stitcher head, an anvil 104 for supporting the wire, a former 105 including two elements at opposite sides respectively of the driver for forming the wire into a generally U-shape about the anvil and a driver 106 for driving the formed staple through the set SS.
  • the clincher 201 comprises a clincher housing 202 having a clamping surface 203 by which a set SS may be clamped against the underside of the stitcher head 101 and containing clinch ears 204 arranged to receive and act upon staple legs driven through the set and into the housing through a slot in the surface 203.
  • the clincher 201 is shown in its operative position with a set SS positioned against the head 101 which is fixed in position above the compiler tray. It will be understood, however, that during compilation of the set, the clincher is lowered so that the clamping surface 203 is below the support surface 72 of tray 71. During a stitching operation the clincher 201 is raised to lift the set SS against the underside of the head 101 and clamp it in position. Variations in set thickness are accommodated by the drive mechanism 210 by which the clincher housing is raised to lift the set against the underside of the stitcher head and clamp it into position to receive a stitch.
  • This mechanism comprises a force applying ring 205 which lifts the housing via a compression spring 206, being moved through a fixed distance by a lever 207 (see Figure 4).
  • the spring 206 is positioned between the force applying ring 205 and a shoulder 208 and the lever 207 which is arranged to pivot about axis 209 is actuated by a cam (not shown) which acts on its free end 207a.
  • the other end of the lever is bifurcated to form a yoke 207b which is pivotally connected to the force ring 205.
  • the clincher housing 202 is supported and guided by a pair of arms 211 pivotally connected between the housing and the frame of the stitcher.
  • the mechanism 210 in addition to accommodating varying set thicknesses, varies the clamping pressure applied to the set as a function of set thickness. Thus, the thinner the set the less the compression of spring 206 and the less the clamping force applied.
  • the clincher ears 204 are positioned in fixed relation to the housing 202 so that they are always presented to the set in the same relation regardless of the set thickness.
  • the wire advancing and cutting mechanism 103 comprises movable wire advancing and cutter blocks 120, 121 and an inhibitor member 124 positioned by the clincher 201 in dependence on the thickness of the set of sheets SS.
  • the blocks 120, 121 include wire grippers or diodes 122, 123 which grip the wire only against movement relative to the respective block in the direction opposite the wire advancing direction. Thus, the diodes grip the wire when the blocks are moved to the left but allow each block to be moved to the right along the wire while the other block holds the wire.
  • the blocks 120 and 121 are positioned as shown in dotted lines in Figure 2.
  • the advancing block 120 is moved to the left, its diode 122 gripping the wire, to advance the wire past the rest or start-of-cycle position of the cutter 125 by a distance made up of constant (crown length plus twice clinch length) plus the set thickness and the cutter block is retracted from its rest position by a distance equal to the set thickness.
  • These movements and thus the length of wire W presented to the stitcher head 101 for severing by the cutter 125 are determined by the inhibitor member 124 which limits the movement of the blocks 120, 121, according to the thickness of the set.
  • the blocks 120, 121 are shown in full lines in their final positions at the end of a wire advancing movement.
  • the cutter block 121 returns to its rest position pulling the wire with it - so that the wire end is always in the same position at the start of a feed cycle - and the advancing block 120 traverses back along the wire to its rest position.
  • the wire advancing and cutting mechanism 103 is more fully illustrated in Figures 5 and 6 from which it will be seen that the advancing block 120 and the cutter block 121 are both mounted for horizontal sliding movement on a guide rail 126.
  • the wire advancing direction is from right to left and the cutter 125 is pivotally mounted on the left-hand end 127 of the cutter block which forms a shear face.
  • the cutter is actuated by a projection 109 on the former 105 as described below and is returned to its inactive position following an operating cycle by a tension spring 128.
  • the blocks 120, 121 have bores 129 through which the wire W is threaded and which incorporates the wire diodes 122, 123.
  • the diodes comprise a cavity 130 along the bore 129 which contains a roller 131 lightly loaded by a spring 132.
  • the face 133 of the cavity opposite the bore is inclined so that the cavity tapers outwardly or enlarges in the wire advancing direction and the spring 132 urges the roller into engagement with the wire.
  • the blocks 120, 121 are respectively driven by levers 134, 135 through override springs 136, 137.
  • the levers are driven by cams (not shown) through a fixed travel and the springs 136, 137 accommodate the variations in the travel of the blocks 120, 121 imposed by the inhibitor member 124.
  • the latter is mounted for vertical sliding movement with the clincher housing 202 as schematically illustrated in Figure 2.
  • the inhibitor member 124 has two opposed 45° faces 141, 142 which are engaged by 45° faces 138, 139 respectively on the advancing block 120 and the cutter block 121. Using 45° faces, the relationship between the position of the clincher housing and the inhibitor 124 is linear and 1:1.
  • the inhibitor member 124 may be directly connected to the clincher housing 202 as schematically represented in Figure 2, other arrangements are possible.
  • the inhibitor member 124 is carried on an arm 143 pivoted to the stitcher head at 144 and is positioned by means of an actuator 145 mounted on one of the clincher housing guide arms 211.
  • the actuator is adjustable for correctly setting the mechanism and comprises a bolt 146 threaded through a bracket 147 and locked into position by a nut 148. While the clincher is retracted, the inhibitor is supported by a limit stop 149.
  • the embodiment of Figure 7 also includes a modified drive for the force ring 205 in which as a space-saving measure, the lever 207 carries a cam follower 270 intermediate the force ring 205 and pivot axis 209 which is controlled by a face cam 219 the centre-line of the guideway of which is shown by the dash-dot line 219a.
  • the cam 270 is mounted on a cam shaft 218.
  • the length of wire presented to the stitcher head 101 by the mechanism 103 is cut, formed and driven in the following manner. While the anvil 104, which is pivotally mounted at 107 and biassed to its start-of-cycle position by a spring 108 as shown in Figure 3, is held against movement, the driver 106 is moved downwardly against the wire to clamp it in position on the anvil. The former elements 105 then start moving downwardly. Initial movement of the former operates the cutter 125 through actuator 109 to sever the required wire length and further movement thereof shapes the wire about the anvil 104 into a generally U-shape. In order to accommodate the wire during this operation, the formers have guide grooves 110 along their inner faces.
  • the former At the end of the forming operation the former is in its lower limit position with the lower end of the former elements 105 below the underside of the anvil 104 and adjacent the set.
  • the driver 106 is now driven downwardly, pivoting the anvil about its axis 107, to drive the formed staple.
  • the anvil includes a sloping surface 104a.
  • the anvil surface 104a forms a support for the crown of the staple.
  • the former elements serve to support the legs of the staple in the grooves 110 during the driving movement.
  • the anvil must be held against movement during the cutting and forming stage but be pushed out of the way during the driving stage.
  • This may be achieved by using a spring 108 which is strong enough to hold the anvil stationary during cutting and forming.
  • this requires that the force available to drive the driver must be sufficient also to overcome the resistance of the spring.
  • the anvil be held locked in position during the cutting and forming stage and released by the former 105 at the end of its travel whereby only a relatively light spring 108 is required which is sufficient to return the anvil to its start-of-cycle position and to ensure that the anvil supports the staple crown during the driving stage.
  • FIG. 7 One way of achieving this is shown in Figure 7 in which the anvil is geometrically locked in position during the cutting and forming steps by arranging the pivot axis 107 above the line of pressure engagement between driver and anvil, the lock being released by a projection 190 on the former engaging an actuator surface 170 on the anvil support area.
  • the stitcher has a two stage driver action in which following wire feed a first stage motion operates to grip the wire W against the anvil 104 during cutting and forming and a second stage motion acts following forming to effect driving of the formed staple.
  • a mechanism suitable for this operation based on pivoted motions which first holds the wire against the anvil and then provides the driving motion all from one continuous input lever travel is described in our copending EP-A-0013165.
  • the ends of the staple legs are turned over and wiped flat against the underside of the set by the clincher ears 204.
  • the clincher 201 is operated as described more fully in our copending EP-A-0013163 so that the staple legs having passed through the set move through air and meet no further resistance during driver travel.
  • the drive to the clincher ears may be a spring which is loaded during return motion of the clincher housing at the completion of a stitching operation as more fully described in our copending EP-A-0013159, the clinch ears being held latched in the position shown in Figure 2 prior to the operation thereof, or by a cam drive 250 as illustrated in Figure 7 where the clincher rod 213 is driven by an edge or ramp cam 250 mounted on the same drive shaft 218 as, and alongside, the cam 219 which drives the force-ring lever 207.
  • the drive to the clincher rod from the cam 250 is effected by a roller follower 251 mounted on one end of a crank arm 252 pivoted to a bracket 253 depending outwardly from the clincher housing 202.
  • the other end of the crank arm carries a stop 254 which engages the bottom end of the clincher rod 213.
  • the stop 254 is adjustable to permit setting of the clincher ear movement.
  • the clincher ears 204 are biassed to their open, retracted position by a spring schematically represented at 255.
  • the cam shaft 218 is driven in synchronism with the head 101 drive and the cam 250 is disposed so that the clincher rod is driven only after the formed staple has been completely driven through the set.
  • FIG. 8 to 11 An embodiment of wire advancing and cutting mechanism is shown in Figures 8 to 11 in which as noted above the inhibitor member 124 is pivoted to stitcher head at 144 and positioned by an actuator 145 seen in Figure 7. More specifically it will be seen that the inhibitor member is pivoted to a frame 150 of the stitcher which like the head 101 is fixed.
  • the frame includes end plates 151, 152 (the latter being omitted in Figure 10 for clarity) and cross bars 153-156 of which bars 154, 155 act as rails for the wire advancing and cutter blocks 120, 121 and bar 156 carries the pivot 144 for inhibitor member 124.
  • the wire advancing and cutter blocks 120, 121 are permanently biassed together by spring mechanism 157 and driven apart by a double- face cam 1 58 during positioning of the inhibitor member 124.
  • the spring mechanism 157 best comprises tensator springs 159 of which a pair are used.
  • the springs 159 which are each of three layers of spring steel 0.15 mm thick, are secured at one end between brackets 160 mounted on the cutter block 121 and at the other end wrap around posts 161 on the wire advancing block 120.
  • the blocks 120, 121 carry cam followers 162, 163 which act respectively on the opposite faces 164, 165 of the cam 158.
  • the cam 158 is asymmetric in view of the greater variation in movement required of the wire advancing block 120 compared with the cutter block 121.
  • the advancing block pushes the wire through the cutter block (diode 123 free) which - see cam profile in Figure 8 - initially remains stationary.
  • the cutter block is retracted (diode 123 still running free) back to the position shown while the advancing block (diode 122 still locked) finalises its return movement.
  • these return movements of the blocks 120, 121 are limited by the inhibitor 124.
  • the cam profile is chosen so that the portion 165a of cutter block actuating face 165 corresponds to the position of the cutter for the wire length required for a minimum thickness set. This not only ensures that for a minimum thickness set, the cutter block does not have to move but provides a ready means of accurately setting the inhibitor.
  • the limit stop 149 for the inhibitor 124 is carried by an arm 124a secured to the frame 150.
  • the advancing and cutter blocks 120, 121 are each constructed in two parts bolted together, as by bolt 166 and the cutter block 121 includes an adjustable shear member 167.
  • the cutter 125 is carried at the end of a pivotally mounted arm 180 and is driven by pivot plate 181 via a pin 182 on the arm 180 engaging in a slot 183 in plate 181.
  • the plate 181 is itself driven by projection 190 (see Figure 7) on the former which engages in a recess 184 in the plate 181.
  • FIG. 12 shows a stitcher having a head 101 and clincher 102 like that of Figure 2, like references being used to designate like parts.
  • the wire advancing and cutting mechanism 303 comprises a primary or main feed mechanism consisting of movable wire advancing block 320 by which the wire is advanced by a fixed distance, a secondary or proportional feed mechanism consisting of movable wire advancing and cutter blocks 321, 322 and an actuator member 324 positioned by the clincher 201 in dependence on the thickness of the set of sheets SS.
  • the blocks 320, 321, 322 include wire diodes 323 which grip the wire only against movement relative to the respective block in the direction opposite the wire advancing direction. Thus, the diodes grip the wire when the blocks are moved to the left in Figure 2 but allow each block to be moved to the right along the wire while the other block(s) hold(s) the wire.
  • the blocks are positioned as shown in dotted lines in Figure 2.
  • the main advancing block 320 is moved to the left, its diode 323 gripping the wire, to advance the wire past the rest or start-of-cycle position of the cutter 125 by a fixed distance d made up of a constant (crown length plus twice clinch length).
  • the secondary wire feed mechanism comprising the blocks 321, 322 is actuated, the block 321 further advancing the wire by a distance equal to the set thickness and the cutter block being retracted from its rest position by a distance equal to the set thickness further to uncover the wire by that amount.
  • the movements of the secondary wire feed blocks 321, 322 and thus the length of wire W presented to the stitcher head 101 for severing by the cutter 125 are determined by the actuator member 324 which determines the movement of the blocks 321, 322 according to the thickness of the set.
  • the blocks 320, 321 and 322 are shown in full lines in Figure 2 in their final positions at the end of a wire advancing movement.
  • the cutter block 321 returns to its rest position pulling the wire with it - so that the wire end is always in the same position at the start of a feed cycle - and the advancing blocks 320 and 321 traverse back along the wire to their rest positions.
  • block 320 advances the wire by a constant equal to crown length plus twice clinch length plus twice minimum set thickness and the blocks 321, 322 are each moved by a distance equal to the set thickness minus the minimum set thickness. With this arrangement the blocks 321, 322 are not moved at all during binding of a minimum thickness set.
  • wire diodes 323 incorporated in the wire advancing and cutting blocks 320, 321, 322 are like the blocks illustrated in Figure 5.
  • the actuator 324 is connected to the advancing and cutter blocks 321, 322 such that the vertical movement of the actuator is translated into equal and opposite movements towards one another of the blocks along the wire. Suitable mechanisms for achieving this are described below with reference to Figures 14 to 16 and 17.
  • the length of wire presented to the stitcher head 101 by the mechanism 303 is cut, formed and driven in the manner described above with reference to the embodiment of Figure 2.
  • the wire advancing and cutting mechanism 303 is more fully illustrated in Figures 13 to 16.
  • the main wire advancing mechanism 320 by which the wire is advanced a fixed distance is shown in Figures 13 and is arranged upstream of the secondary or proportional wire advancing and cutting mechanism 321, 322 which is mounted on the stitcher head as shown in Figure 14.
  • the main wire feed block 320 is incorporated in a crank 351 pivoted at its lower end 352 to the frame 350 of the stitcher and having a slot 353 at its other end engaged by a pin 354 on a drive plate 355 rotation of which oscillates the crank 351 about pivot 352.
  • the block 320 is aligned between a flexible wire guide tube 356 extending from the wire reel and a rigid wire guide tube 357 leading to the stitcher head.
  • the drive plate 355 is driven through a single revolution by a drive motor mounted on the back of bracket 358, the motor being controlled by a microswitch 359.
  • the wire is advanced during the first half revolution of the plate 355 and as the crank returns, the wire is gripped against return movement by the diodes in the blocks 321, 322.
  • the wire is further advanced and the cutter 125 positioned by the secondary or proportional wire feed mechanism shown in Figures 14 to 16.
  • movement of the secondary blocks 321, 322 is effected in response to movement of an actuator 324 which itself is proportional to set thickness.
  • the actuator 324 includes a rod 360 fixed to the force ring 205 and slideably mounted in a guide in the clincher body 206.
  • the vertical movement of the rod 360 is translated into horizontal sliding movement of the blocks 321, 322 along the wire by the following mechanism.
  • the rod 360 raises and lowers a lever 361 pivoted to the clincher housing 202 and this in turn actuates a crank 362 which drives a rack 363 via a drive 362a.
  • the rack 363 is fixed to the cutter block 322.
  • the cutter block 322 and the proportional feed block 321 are slideably mounted on a guide rail 364 carried by a support 365 for movement towards and away from each other along the wire path.
  • a second rack 366 fixed to the feed block 321 is connected to rack 363 via a pinion 367 rotatably mounted on support 365.
  • lifting of the rod 360 causes the rack and pinion 363, 366, 367 to move the feed and cutter blocks 321, 322 towards each other by equal amounts, the movement of the blocks being proportional to the movement of the actuator rod 360.
  • the wire is advanced by the main feed block 320 but the actuator rod 360 moves insufficiently to operate the crank 362 and the feed blocks 321, 322 remain stationary so that the wire fed is solely that advanced by the main feed block. As shown, this wire is centred about the centre-line CL of the stitcher head.
  • the actuator rod 360 operates crank 362 which in turn causes rack and pinion 363, 366, 367 to draw the blocks 321, 322 together as shown in Figure 16 so that additional amounts of wire T1, T2 equal to the set thickness are uncovered beyond the cutter block 322 by the movements of the blocks 321, 322 respectively. Since the cutter block is retracted equally to the advance of the feed block 321, the wire fed remains centred about the centre-line CL of the stitcher head.
  • the rack and pinion is replaced by an endless belt 368 entrained over rollers 368a, 368b, mounted on the supprt 365 and to opposite runs of which the blocks 321, 322 are respectively secured by clamps 369.
  • the crank 362 drives roller 368a.
  • the stitching wire (0.6 to 0.7 mm diameter) is supplied on a 300 mm diameter moulded spool having a capacity of 2 Kg of wire or approximately 40,000 stitches.
  • the main wire feed supplies a 23.5 mm length of wire and the proportional wire feed accommodates sets up to 7.5 mm thick.
  • the main feed is effected in 150 ms outside the stitching cycle of 300 ms. Proportional wire feed of course takes place during the main stitching cycle.
  • Figure 18 shows a stitcher like that of Figure 7, like references being used to designate like parts, but including a wire advancing mechanism including actuator rod 360 and lever 361 illustrated like that shown in Figure 14 or 17.
  • the secondary or proportional wire feed block 321 is slideably mounted on the main wire feed 320 and the two feed blocks share the same wire diode (gripper) 323.
  • the main and secondary feed blocks 320, 321 move as a single unit and may be driven for example by a drive as shown in Figure 13 or by a cam.
  • the required movement of the proportional wire feed and cutter blocks 321, 322 is effected by Bowden cables 380, 381 connected between the respective feed blocks and the force ring 205 of the clincher. Springs 382, 383 serve to return the blocks 321,322 to their rest positions at the end of a feed cycle.
  • the two Bowden cables are connected to diametrically opposite points on the force ring to equalise the forces on the ring.
  • the stitcher While in the apparatus described above the stitcher is fixed in position, it may be movable for varying the position of the stitch or for inserting more than one stitch in a set. Also, two or more stitchers according to the invention, which may themselves be movable, may be operated in tandem, in which case various of the drive elements may be common to avoid duplication.
  • the stitcher head is fixed, the clincher could be fixed and the clamping means be formed by the sheet receiving surface of the head itself.
  • stitcher may be arranged in any suitable orientation and specifically the clincher may be arranged over the stitcher head.
  • staple is used herein to mean either a wire- fastener which is pre-formed outside the stitching machine or one which is formed within the machine.
  • the ends of the staple or stitch legs may be turned over by an active clincher including ears which are wiped against the leg ends as described above or by a passive clincher having fixed guide surfaces.
  • an active clincher including ears which are wiped against the leg ends as described above or by a passive clincher having fixed guide surfaces.
  • the constant by which the wire is advanced is either crown length plus twice clinch length or crown length plus twice clinch length plus a minimum set thickness
  • the constant may equal crown length plus once clinch length in which case the cutter will include a clinch length.
  • the cut wire length may be varied so as to produce a constant clinch size regardless of set thickness or the clinch size may be variable as a function of set thickness, being longer for thicker sets.
  • the cut wire length may be varied so as to produce a constant clinch size regardless of set thickness or the clinch size may be variable as a function of set thickness, being longer for thicker sets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (15)

1. Drahtheftvorrichtung (100) mit einem beweglichen Schneidwerkzeug (125) zum Abschneiden einer Länge Drahtes von einem Drahtvorrat und einem Heftkopf (101) zum Formen und Eintreiben der abgeschnittenen Drahtlänge zum Binden eines Blattsatzes (SS), wobei das Schneidwerkzeug eine Ruhestellung hat und die Länge des dem Heftkopf zugeführten abgeschnittenen Drahts automatisch bestimmt wird, indem der Draht (W) um ein von der Dicke der Blattsatzes (SS) abhängiges Stück vorgeschoben und das Schneidwerkzeug in Abhängigkeit von der Dicke des Blattsatzes (SS) positioniert wird, gekennzeichnet durch eine Einrichtung für den Vorschub des Endes des Drahtvorrats (W) um ein von der Dicke des Blattsatzes abhängiges Stück von der Ruhestellung des Schneidwerkzeugs (125) aus und durch eine Einrichtung zum Zurückbewegen des Schneidwerkzeugs (125) um ein von der Dicke des Blattsatzes abhängiges Stück.
2. Heftvorrichtung nach Anspruch 1, bei welcher das Ende des Drahtvorrats (W) um eine Streckt über die Ruhestellung des Schneidwerkzeugs hinaus bewegt wird, welche sich aus entweder einer ersten Konstanten (gleich der Kronenlänge plus zweimal der Schließlänge plus einer Mindestdicke des Blattsatzes) oder einer zweiten Konstanten (gleich der Kronenlänge plus zweimal der Schließlänge) und der Dicke des Blattsatzes zusammensetzt, und das Schneidwerkzeug (125) aus seiner Ruhestellung um eine Strecke zurückbewegt wird, welche im Falle der ersten Konstante gleich der Dicke des Blattsatzes minus der Mindestdicke des Blattsatzes und im Fall der zweiten Konstante gleich der Dicke des Blattsatzes ist.
3. Heftvorrichtung nach Anspruch 1 oder 2, bei welcher der Draht (W) mittels einer Greifeinrichtung (120) vorwärts bewegt wird und die Greifeinrichtung (120) und das Schneidwerkzeug (125) aufeinander zu belastet und durch eine gemeinsames Antriebsteil (158) angetrieben sind, vorzugsweise einen Nocken, mit einander gegenüberliegenden Flächen (164, 165) welche auf die Greifeinrichtung (120) bzw. auf das Schneidwerkzeug (125) einwirken.
4. Heftvorrichtung nach Anspruch 1, 2 oder 3, bei welcher der Draht mittels einer beweglichen Greifeinrichtung (12) vorwärtsbewegt wird und die Bewegung der Greifeinrichtung (120) und des Schneidwerkzeugs (125) durch einen in Abhängigkeit von der Dickes des Satzes positionierten Begrenzer (124) begrenzt ist.
5. Heftvorrichtung nach Anspruch 4, bei welcher der Begrenzer (124) durch eine gegenüber dem Heftkopf (101) angeordnete bewegliche Klemmeinrichtung (203) zum Positionieren des Blattsatzes (SS) gegenüber dem Heftkopf (101) oder durch eine Bewegung der Heftkopfs (101) relativ zu einer feststehenden Klemmeinrichtung (203), mittels welcher ein Blattsatz (SS) gegenüber dem Heftkopf (101) positioniert ist, positioniert wird, bei welcher die Greifeinrichtung (120) und das Schneidwerkzeug (125) an entsprechenden Flächen (141, 142) des Begrenzers (124), welcher in einer zur Bewegungsebene des Schneidwerkzeugs (125) und der Greifeinrichtung (120) lotrechten Ebene bewegbar ist, in Anlage kommende Flächen (138 bzw. 139) haben, und bei welcher der Greifeinrichtung (120) und dem Schneidwerkzeug (125) Drahtgreifer (122 bzw. 123) zugeordnet sind, welche den Draht (W) nur gegenüber einer Bewegung desselben relativ zur Greifeinrichtung (120) bzw. zum Schneidwerkzeug (125) in der dem Drahtvorschub entgegengesetzten Richtung festhalten.
6. Verfahren zum Binden eines Blattsatzes, bei welchem ein Stück Draht von einem Drahtvorrat (W) abgeschnitten, geformt und durch den Blattsatz (SS) hindurchgetrieben wird, um die Blätter zusammenzuheften, wobei die Länge des Drahtstücks automatisch in Abhängigkeit von der Dicke des Blattsatzes (SS) bestimmt wird, indem der Draht (W) un eime von der Dicke des Satzes (SS) abhängige Strecke vorgeschoben und ein Drahtschneidwerkzeug (125) in Abhängigkeit von der Dicke des Satzes positioniert wird, dadurch gekennzeichnet, daß der Draht der Ruhestellung des Schneidwerkzeugs aus um eine von der Dicke des Satzes abhängige Strecke vorwärtsbewegt und das Schneidwerkzeug um eine von der Dicke des Satzes abhängige Strecke rückwärts bewegt wird.
7. Draht-Heftvorrichtung (100) mit einem beweglichen Schneidwerkzeug (125) zum Abschneiden einer Länge Drahtes von einem Drahtvorrat und einem Heftkopf (101) zum Formen der abgeschnittenen Drahtlänge und Eintreiben derselben zum Heften eines Blattsatzes (SS), wobei das Schneidwerkzeug eine Ruhestellung hat und die Länge des dem Heftkopf (101) zugeführten abgeschnittenen Drahtstücks automatisch bestimmt wird, indem der Draht (W) um eine von der Dicke des Blattsatzes (SS) abhängige Strecke vorgeschoben und das Schneidwerkzeug (125) in Abhängigkeit von der Dicke des Blattsatzes (SS) positioniert wird, gekennzeichnet, durch eine erste Einrichtung (320) für den Vorschub des Drahts (W) um eine feste Strecke von der Ruhestellung des Schneidwerkzeugs (125) aus und durch eine zweite Einrichtung (321, 322, 324) für den weiteren Vorschub des Drahts (W) in Abhängigkeit von der Dicke des Blattsatzes (SS) und zum Zurückbewegen des Schneidwerkzeugs (125) in Abhängigkeit von der Dicke des Blattsatzes (SS).
8. Heftvorrichtung nach Anspruch 7, bei welcher das Schneidwerkzeug (125) eine Ruhestellung hat und das Ende des Drahtvorrats (W) mittels der ersten Einrichtung (320) um eine feste Strecke über die Ruhestellung des Schneidwerkzeugs hinaus und (gegebenenfalls außer im Falle eines eine Mindestdicke aufweisenden Blattsatzes) zusätzlich über eine von der Dicke (55) des Satzes abhängige Strecke vorgeschoben und das Schneidwerkzeug (125) (gegebenenfalls außer im Falle eines eine Mindestdicke aufweisenden Blattsatzes) um eine von der Dicke des Blattsatzes abhängige Strecke zurückbewegt wird.
9. Heftvorrichtung nach Anspruch 7, bei welcher das Schneidwerkzeug (125) eine Ruhestellung hat und das Ende des Drahtvorrats (W) mittels der ersten Einrichtung (320) um eine der Kronenlänge plus zweimal der Schließlänge plus zweimal der Mindestdicke eines Blattsatzes entsprechende Strecke über die Ruhestellung des Schneidwerkzeugs (125) hinaus und anschließend, außer im Falle eines eine Mindestdicke aufweisenden Blattsatzes, mittels der zweiten Einrichtung (321, 322, 324) um eine der Dicke des Blattsatzes minus der Mindestdicke entsprechende Strecke vogeschoben wird und das Schneidwerkzeug (125) um eine der Dicke des Blattsatzes minus der Mindestdicke entsprechende Strecke aus seiner Ruhestellung zurückbewegt wird, oder das Drahtende um eine der Kronenlänge plus zweimal der Schließlänge entsprechende Strecke und anschließend mittels der zweiten Einrichtung (321, 322, 324) um eine der Dicke des Blattsatzes entsprechende Streck vorgeschoben und das Schneidwerkzeug (125) um eine der Dicke des Blattsatzes entsprechende Strecke aus seiner Fuhestellung zurückbewegt wird.
10. Heftvorrichtung nach Anspruch 7, 8 oder 9, mit einem ersten Drahtgreifer (320) für den Vorschub des Drahts (W) über die feste Strecke über das Schneidwerkzeug (125) hinaus, einem zweiten Drahtgreifer (321) für den weiteren Vorschub des Drahts (W) über eine von der Dicke des Blattsatzes (SS) abhängige Strecke und einem den Schneidwerkzeug zugeordneten dritten Drahtgreifer (322) zum Festhalten des Drahts beim Zurückziehen des ersten und des zweiten Drahtgreifers (320, 321), wobei die Bewegungen des zweiten Drahtgreifers (321) und des Schneidwerkzeugs (125) durch eine in Abhängigkeit von der Dicke des Blattsatzes positioniertes Betätigungsglied (324) gesteuert sind.
11. Heftvorrichtung nach Anspruch 10, bei welcher der zweite Drahtgreifer (321) und das Schneidwerkzeug (125) für gleiche und in entgegengesetzten Richtungen verlaufende Bewegungen entlang dem Vorschubweg des Drahts miteinander verbunden sind.
12. Heftvorrichtung nach einem der Ansprüche 7 bis 11, bei welcher die erste Einrichtung (320) einen Drahtgreifer (321) für den Vorschub des Drahts (W) über die feste Strecke antreibt und die zweite Einrichtung (205) den Drahtgreifer (321) über die weitere Strecke vortreibt und das Schneidwerkzeug (125) zurückbewegt.
13. Heftvorrichtung nach Anspruch 12, bei welcher die erste Einrichtung (320) einen für den Vorschub des Drahts (W) über die feste Strecke um diese feste Strecke vorwärts bewegbaren Vorschubblock aufweist, auf welchem der Drahtgreifer (321) für den weiteren Vorschub des Drahts (W) in Abhängigkeit von der genannten Dicke verschlieblich gelagert ist.
14. Heftvorrichtung nach Anspruch 12 oder 13, bei welcher die zweite Einrichtung (205) einen betätigungsmechanismus mit Bowdenzügen (381, 380) aufweist, welche das Schneidwerkzeug (125) und den Drahtgreifer (321) mit einer beweglichen Klemmeinrichtung (205) für den Blattsatz (SS) verbinden, wobei dem Schneidwerkzeug (125) ein Drahtgreifer (322) zum Festhalten des Drahts (W) während des Zurückziehens des den Vorschub des Drahts bewerkstelligenden (321) zugeordnet ist.
15. Verfahren zum Heften eines Blattsatzes, bei welchem ein Stück Draht von einem Drahtvorrat (W) abgeschnitten, geformt und zum Zusammenheften der Blätter durch den Blattsatz (SS) hindurchgetrieben wird, und bei welchem die Länge des Drahtstücks automatisch in Abhängigkeit von der Dicke des Blattsatzes (SS) bestimmt wird, indem der Draht über eine von der Dicke des Blattsatzes (SS) abhängige Strecke vorgeschoben und ein Draht-Schneidwerkzeug (125) in Abhängigkeit von der Dicke des Blattsatzes positioniert wird, dadurch gekennzeichnet, daß die Länge des Drahtstücks automatisch in Abhängigkeit von der Dicke des Blattsatzes bestimmt wird, indem der Draht (W) zuerst über eine feste Strecke und anschließend über eine von der Dicke des Blattsatzes (SS) abhängige Strecke vorgeschoben und das DrahtSchneidwerkzeug (125) aus einer Ruhestellung um eine von der Dicke des Blattsatzes abhängige Strecke zurückbewegt wird.
EP19790303015 1978-12-29 1979-12-21 Drahtheftvorrichtungen und Verfahren zum Binden von Blattstapeln Expired EP0013164B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB7850328 1978-12-29
GB5032878 1978-12-29
GB7850325 1978-12-29
GB5032578 1978-12-29
GB7914810 1979-04-27
GB7914810 1979-04-27

Publications (2)

Publication Number Publication Date
EP0013164A1 EP0013164A1 (de) 1980-07-09
EP0013164B1 true EP0013164B1 (de) 1984-09-12

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EP19790303015 Expired EP0013164B1 (de) 1978-12-29 1979-12-21 Drahtheftvorrichtungen und Verfahren zum Binden von Blattstapeln

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Country Link
EP (1) EP0013164B1 (de)
BR (1) BR7908563A (de)
DE (1) DE2967220D1 (de)
MX (1) MX152703A (de)
SU (1) SU1477242A3 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028164A1 (de) * 1979-10-30 1981-05-06 Xerox Corporation Elektrostatographisches Reproduktionssystem
EP0028165A1 (de) * 1979-10-30 1981-05-06 Xerox Corporation Elektrostatographisches Reproduktionssystem
EP0099249A1 (de) * 1982-07-07 1984-01-25 Xerox Corporation Drahtheftmaschine
US4708277A (en) * 1986-11-28 1987-11-24 Am International Incorporated Stitching head
FR2681000A1 (fr) * 1991-09-05 1993-03-12 Sodeme Dev Mat Emballa Tete d'agrafage sans frottement.
US5938388A (en) * 1997-03-27 1999-08-17 Eastman Kodak Company Method and device for preparing, manipulating, and processing a staple wire for stapling sheets in a stapling apparatus
DE19712876B4 (de) * 1997-03-27 2005-03-17 Nexpress Solutions Llc Heftvorrichtung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614320A1 (de) * 1986-04-28 1987-10-29 Nagel Ernst Gmbh Co Kg Heftvorrichtung
KR20150013430A (ko) * 2012-05-07 2015-02-05 토카이 카렌다 가부시키가이샤 바인딩 장치 및 용지의 바인딩 방법
CN105819014B (zh) * 2016-05-09 2017-11-24 青岛惠运办公科技集团股份有限公司 滚筒线圈拆分装置和滚筒线圈拆分压合一体机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR651636A (fr) * 1928-03-17 1929-02-21 Perfectionnements aux machines à agrafer
GB692106A (en) * 1950-08-30 1953-05-27 Vickers Armstrongs Ltd Improvements in or relating to manually or foot operated wire stitching machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028164A1 (de) * 1979-10-30 1981-05-06 Xerox Corporation Elektrostatographisches Reproduktionssystem
EP0028165A1 (de) * 1979-10-30 1981-05-06 Xerox Corporation Elektrostatographisches Reproduktionssystem
EP0099249A1 (de) * 1982-07-07 1984-01-25 Xerox Corporation Drahtheftmaschine
US4708277A (en) * 1986-11-28 1987-11-24 Am International Incorporated Stitching head
FR2681000A1 (fr) * 1991-09-05 1993-03-12 Sodeme Dev Mat Emballa Tete d'agrafage sans frottement.
US5938388A (en) * 1997-03-27 1999-08-17 Eastman Kodak Company Method and device for preparing, manipulating, and processing a staple wire for stapling sheets in a stapling apparatus
DE19712863C2 (de) * 1997-03-27 2001-01-25 Eastman Kodak Co Verfahren und Vorrichtung zum Betreiben eines Geräts zum Heften von Blättern
DE19712876B4 (de) * 1997-03-27 2005-03-17 Nexpress Solutions Llc Heftvorrichtung

Also Published As

Publication number Publication date
MX152703A (es) 1985-10-18
EP0013164A1 (de) 1980-07-09
BR7908563A (pt) 1980-10-21
SU1477242A3 (ru) 1989-04-30
DE2967220D1 (en) 1984-10-18

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