EP0061773A1 - Dispositif de séparation pour machines à écrire et mécanismes d'impression - Google Patents

Dispositif de séparation pour machines à écrire et mécanismes d'impression Download PDF

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Publication number
EP0061773A1
EP0061773A1 EP82102681A EP82102681A EP0061773A1 EP 0061773 A1 EP0061773 A1 EP 0061773A1 EP 82102681 A EP82102681 A EP 82102681A EP 82102681 A EP82102681 A EP 82102681A EP 0061773 A1 EP0061773 A1 EP 0061773A1
Authority
EP
European Patent Office
Prior art keywords
knife
rotary knife
roller
take
separating device
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.)
Granted
Application number
EP82102681A
Other languages
German (de)
English (en)
Other versions
EP0061773B1 (fr
Inventor
Udo Tewes
Hinderikus Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Nixdorf Informationssysteme GmbH
Original Assignee
Wincor Nixdorf International GmbH
Nixdorf Computer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wincor Nixdorf International GmbH, Nixdorf Computer AG filed Critical Wincor Nixdorf International GmbH
Publication of EP0061773A1 publication Critical patent/EP0061773A1/fr
Application granted granted Critical
Publication of EP0061773B1 publication Critical patent/EP0061773B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • B26D1/385—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators

Definitions

  • the invention relates to a separating device for writing and printing units for separating sections of web-shaped record carriers, comprising a stationary knife extending across the width of the record carrier - viewed in the direction of advance thereof - behind the recording point and interacting therewith by a drive device around a parallel Knife axis directed back and forth to the stationary knife and having a cutting edge running at an angle to the knife axis.
  • a separating device of the type mentioned above is known, which is used for separating documents in a cash register.
  • the rotary knife is made from a round rod, which has a flat surface running at least approximately through the rod axis, so that the rotary knife has the shape of a semi-cylindrical rod.
  • the cutting line forms the cutting line between the flat surface and the outer surface of the round rod.
  • Such a rotary knife may be suitable for cutting through relatively narrow strips of paper, as described in Re cash registers can be used.
  • such a rotary knife would not be suitable for severing wide paper webs and in particular of continuous form sets, such as those used in writing and printing units.
  • the cutting edge of the rotary knife In order to achieve a shear effect between the cutting edge of the rotary knife and the cutting edge of the stationary knife, the cutting edge of the rotary knife must run at a certain angle to the knife axis. This angle must be steeper, the stronger the paper web that is to be severed in order to keep the force required for severing or the torque to be transmitted to the rotary knife relatively low.
  • German utility model 74 08 722 says nothing about how the cut documents are removed from the separation point. In the case of fast-working writing and printing units, however, it is necessary to remove the separated sections immediately from the separation point and, if necessary, to stack them automatically. This usually requires means for holding the sections to be separated off during the separation process and a conveyor for removing the removed parts separated section.
  • the invention is based on the object of specifying a separating device of the type mentioned at the outset, which also enables the cutting through of broad web-shaped recording media, in particular multilayer continuous form sets, with a relatively low expenditure of force and ensures safe removal of the separated sections.
  • the rotary knife is formed by a hollow cylinder, the jacket of which has two diametrically opposite openings which extend to form a passage for the recording medium over at least one length of the hollow cylinder corresponding to the web width and one of which is on a long side is limited by a spiral cutting edge, and that in the feed direction behind the rotary knife and parallel to it, a draw-off roller is rotatably mounted, which can be driven intermittently in such a way that it stops during the cutting movement of the rotary knife and removes the separated web section during the reverse rotation of the rotary knife.
  • the rotary knife Due to the design of the rotary knife as a hollow cylinder, the rotary knife can have a relatively large diameter with a low mass, so that the cutting edge forms a sufficiently large angle with the knife axis even with a relatively large axial length of the knife axis in order to have a good shearing action together with the stationary knife to guarantee.
  • the rotary knife serves at the same time to collect the separated section, so that it remains on the take-off roller until it is transported away from the take-off roller after the separation process has ended. This eliminates the need for support elements or counter-pressure rollers, which would otherwise be required to hold the separated section.
  • the stationary knife, the rotary knife and the take-off roller are preferably arranged in a frame which can be detachably connected to the writing mechanism and which carries a drive motor which drives the rotary knife and the take-off roller via a gear.
  • the separating device thus forms a closed unit which is designed to save space and can optionally be connected to the writing mechanism.
  • the frame comprises two end shields in which the rotary knife and the take-off roller are rotatably mounted and which are connected to one another by a beam carrying the stationary knife.
  • the connection between the separating device and the writing mechanism is facilitated, for example, by the fact that grippers, which are pretensioned in their closed position, are formed on each bearing plate, with which the separating device can be releasably fixed to the shaft of the platen roller of the writing and printing unit. These grippers thus form a snap or snap connection, with which the separating device can be easily attached to the writing device and can be removed from it again.
  • the drive motor is preferably fastened to one of the end shields and drives a shaft, which is mounted in both end shields and is directed parallel to the rotary knife, which in turn is in drive connection with the rotary knife via a toothed gear arranged on the longitudinal ends of the rotary knife.
  • control surfaces can be provided on the shaft of the rotary knife, which interact with microswitches assigned to the shaft for controlling the drive motor.
  • a freewheel is arranged in the gear connection between the drive motor and the take-off roller in such a way that it prevents torque transmission from the drive motor to the take-off roller during the cutting process. This gives the possibility in a simple manner to drive the take-off roller and rotary knife with the same drive motor and still achieve the desired intermittent drive of the take-off roller.
  • a pulley is arranged on the shaft of the drive motor and the take-off roller, over which a crossed belt is guided, and that the freewheel is arranged in one of the pulleys.
  • a guide surface which extends over the length of the openings and leads to the outlet end of the passage channel is preferably arranged in the hollow cylinder.
  • the guide surface can be assigned a guide element which can be pivoted between the end shields about an axis parallel to the knife axis and which projects with its one longitudinal edge into the rotary knife and extends to a point above the take-off roller.
  • the take-off roller works without a counter-pressure roller and is intended to hurl the loose section lying loosely on it, it is expedient if the take-off roller is provided with a coating having a high coefficient of friction on at least part of its circumferential surface.
  • This covering can be formed, for example, by some rubber rings, which are distributed at axial intervals over the length of the take-off roller.
  • FIG. 1 shows a typewriter or printing unit, generally designated 10, with a machine frame 12, in which a platen roller 14 with its shaft 16 (FIGS. 2 and 3) is rotatably mounted. Parallel to the platen roller 14, a writing or printing head 18 can be moved back and forth in a manner known per se.
  • the writing mechanism as such is known per se and is therefore not explained in more detail.
  • a continuous form set 20 (FIG. 3) is fed to the platen roller 14, which sets the platen roller 1 with a rotates at a certain wrap angle and is labeled in a writing or printing area 22 by the print head 18 which can be moved transversely to the feed direction A of the continuous form set 20.
  • the endless form set 20 consists of several superimposed webs or layers and has a perforation on its two longitudinal edges. With this perforation, a push transport works together for the transport of the continuous form set 20, which in each case comprises a spiked belt 24 for each perforation.
  • the spiked straps are directly in front of the platen roller 14, so that the form set 20 is pushed by the spiked straps 24 around the platen roller 14.
  • the two spiked straps 24 are of identical design, so that only one is described with reference to FIG. 3.
  • the spiked belt 24 is formed by an endlessly revolving band, which is motor-driven via a drive shaft 26 and which has on its outside a multiplicity of protruding spikes 28, the mutual spacing of which corresponds to that of the holes in the perforation of the form set 20.
  • the form set 20 runs into the push transport via a guide rod 30 upstream of the spine belt 24, the spikes 28 engaging in the holes in the perforation of the form set 20.
  • the hold-down belt 24 is assigned a hold-down 32 with a guide surface 34 which is pivotally mounted such that it can be tensioned against the drive belt 24 by means of a spring 36 (FIG. 1), so that the Form set 20 is pressed by the guide surface 34 against the spine 24.
  • a pressure wheel 38 which can be driven synchronously with the spine belt 24 is rotatably mounted and has a plurality of cutouts 40 on its circumference, the mutual spacing of which in the circumferential direction of the pressure wheel 38 corresponds to the mutual spacing of the spikes 28. With the cutouts 40, the pressure wheel 38 engages over the spikes 28 and thus prevents the spikes 28 from slipping out of the perforation of the form set 20.
  • the synchronous drive between the toothed belt 24 and the pressure wheel 38 is achieved in that a gear 42, which is connected to the drive shaft 26 of the toothed belt 24 in a rotationally fixed manner, meshes with a gear 44 seated on the shaft of the pressure wheel 38.
  • a gear 46 is connected in a rotationally fixed manner to the shaft 16 of the platen roller 14 and engages via an intermediate gear 48 with a gear 50 seated on the drive shaft 26 of the toothed belt 24.
  • the drive of the spike belt 24 is thus derived from the platen roller 16.
  • the spine strap 24 is guided around a guide body 52 with a smooth support for the belt drum that is currently engaged with the perforation of the form set 20.
  • the spines are formed by cylindrical or involute-shaped pins.
  • the recesses 40 formed in the pressure wheel 38 are designed to be complementary to the shape of the pins or spikes 28, but are slightly larger in diameter than the spikes 28 in order to enable the spikes 28 to enter and leave the recesses 40 smoothly.
  • the pressure wheel 38 is preferably made of plastic.
  • guide surfaces 54 are provided for guiding the form set from the spiked belt 24 around the platen roller 14 to the writing area 22, with these guide surfaces 54 providing the relatively short bridging path between the spiked straps 24 and the platen barrel is closed.
  • pressure rollers 56, 58 are arranged in front of and behind the writing area 22 of the platen roller, which press against the form set 20 hold the peripheral surface of the platen roller 14.
  • a height-adjustable guide plate 60 is arranged below the platen roller 14, which can be adjusted between the position shown in solid lines in FIG. 3 and the position represented by dash-dotted lines. In the upper position, the guide plate 60 ensures that the leading end of the form set 20 automatically runs between the platen roller 14 and the upper pressure roller 58.
  • a separation device For the automatic operation of the writing mechanism 10, a separation device, generally designated 64, is assigned to it, which forms an independent unit and can be arranged directly above the writing roller 14, as is shown in FIG. 3.
  • the separating device 64 comprises a bearing frame with two lateral bearing plates or bearing cheeks 66, which are connected to one another by a cutter bar 68.
  • each end shield 66 has a tong-shaped gripper with a fixed leg 70 and a movable leg 72.
  • the movable leg 72 is pivotally mounted on the end shield 66 about an axis 74 (FIG. 4) and is tensioned by a spring 76 in the direction of the fixed leg 70.
  • the two legs of the gripper have circular arc-shaped recesses the radius corresponding to the radius of the platen shaft 16.
  • the separating device is placed on the platen roller shaft 16 from above, the movable gripper arm 72 being deflected and snapping behind the platen shaft 16 under the action of the tension spring 76, so that the two grippers under the action of the tension springs 76 hold the separating device 64 firmly on the platen shaft Hold 16.
  • the separating device 64 can be removed from the writing mechanism at any time by pivoting the movable gripper legs 72.
  • the knife bar 68 carries a stationary but resilient knife 78 with a straight cutting edge (FIG. 3).
  • This fixed knife 78 is assigned a rotary knife, generally designated 80, which is rotatably supported by a shaft 82 in the two end plates 66.
  • the rotary knife 80 consists of a hollow cylinder which has two diametrically opposite openings 84, 86, which extend at least over a length of the rotary knife 80 corresponding to the width of the form set path 20 and define a passage for the form set path 20 through the rotary knife 80, such as this can be seen in FIG. 3.
  • the two closed cylindrical sections at the two ends of the rotary knife 80 only two elongated jacket sections 88 and 90 remain (see FIGS. 3 and 5).
  • the edge of the casing section 88 which delimits the opening 86 is designed as a spirally curved cutting edge 92 which, when the rotary knife 80 rotates - viewed in FIG. 3 - in the counterclockwise direction with the cutting edge of the stationary knife 78 cooperates to shear off the form set path 20.
  • the knife 80 which can be rotated in both directions, is driven by a drive motor 94 which is flanged to a bearing plate 66.
  • a pinion 98 seated on the motor output shaft 96 drives a gearwheel 100, which is connected in a rotationally fixed manner to a shaft 102 which runs parallel to the rotary knife 80 and extends over the entire length of the separating device 64 and is supported in both end shields 66.
  • the shaft 102 carries a pinion 104, which meshes with a gearwheel 106 connected to the rotary knife 80 in a rotationally fixed manner at the respective end.
  • Control surfaces 108 are formed on the end of the shaft 82 of the rotary knife 80 remote from the motor, which interact with limit switches 110 or the like in order to determine the direction of rotation of the drive motor 94.
  • a take-off roller 112 is arranged, which is directed parallel to the rotary knife and is rotatably mounted with its shaft 114 in the end shields 66.
  • the take-off roller 112 is also driven by the drive motor 94.
  • the output shaft 96 of the drive motor 94, a first pulley 116 is connected in a rotationally fixed manner, which drives a pulley 120 seated on the shaft 114 of the take-off roller 112 via a crossed belt 118.
  • a freewheel is built into the pulleys 120, which allows torque transmission from the drive motor 94 to the take-off roller 112 only when the drive motor 94 rotates the rotary knife 80 back to its starting position, ie viewed in FIG. 3, clockwise when the cutting process is completed .
  • the freewheel ensures that the take-off roller stands still when the drive motor 94 drives the rotary knife 80 during the cutting process. This ensures that a pull from the take-off roller 112 is only exerted on the section of the form set web 20 to be separated when this section is completely separated from the form set web 20.
  • rings 122 made of rubber or another suitable material with a high coefficient of friction are arranged on the take-off roller 112 at axial intervals.
  • the rotary knife 80 has an axially parallel and overlapping the length of the openings 84, 86 extending guide plate 124 is arranged, which guides the leading end of the form set path 20 to the opening 84 and cooperates with a guide grid 126, which is pivotally mounted on the two end shields 66 about an axis 128 and extends from the opening 84 of the Rotary knife 80 extends above the take-off roller 112.
  • the separating device is very compact in its construction and enables the cutting of wide and narrow form set paths.
  • the rotary knife can be accelerated very high due to its small mass, so that the separation process can be carried out very quickly in adaptation to the high writing speeds of modern writing mechanisms.
  • the cut-off part of the form set is held by the rotary knife 80 until it has been removed from the separating device 64 by the take-off roller 112.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Handling Of Sheets (AREA)
EP82102681A 1981-03-30 1982-03-30 Dispositif de séparation pour machines à écrire et mécanismes d'impression Expired EP0061773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3112592 1981-03-30
DE3112592 1981-03-30

Publications (2)

Publication Number Publication Date
EP0061773A1 true EP0061773A1 (fr) 1982-10-06
EP0061773B1 EP0061773B1 (fr) 1985-01-02

Family

ID=6128736

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Application Number Title Priority Date Filing Date
EP82102681A Expired EP0061773B1 (fr) 1981-03-30 1982-03-30 Dispositif de séparation pour machines à écrire et mécanismes d'impression

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EP (1) EP0061773B1 (fr)
DE (1) DE3261742D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011195A1 (fr) * 1990-12-22 1992-07-09 Portals Engineering Limited Guillotine et dispositifs d'avancement de bande
EP0691190A3 (fr) * 1994-06-24 1996-06-05 Fuji Photo Film Co Ltd Dispositif pour la production de pellicules photographiques
US6003420A (en) * 1994-04-26 1999-12-21 Fuji Photo Film Co., Ltd. Apparatus for manufacturing photographic filmstrips
US6257112B1 (en) 1994-04-26 2001-07-10 Fuji Photo Film Co., Ltd. Apparatus for manufacturing photographic filmstrips

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111977088A (zh) * 2020-08-28 2020-11-24 广州融尚贸易有限公司 一种基于电磁原理的封箱装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR401623A (fr) * 1908-04-04 1909-09-06 Georg Bluen Dispositif coupeur destiné aux machines à copier
FR2142431A5 (fr) * 1971-06-14 1973-01-26 Addressograph Multigraph
DE2336028A1 (de) * 1973-07-14 1975-02-06 Olympia Werke Ag Vorrichtung zum abschneiden einzelner papierboegen von einer zugefuehrten papierbahn einer kopierpapierrolle
GB2061796A (en) * 1979-11-08 1981-05-20 Pitney Bowes Inc Tubular knife

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR401623A (fr) * 1908-04-04 1909-09-06 Georg Bluen Dispositif coupeur destiné aux machines à copier
FR2142431A5 (fr) * 1971-06-14 1973-01-26 Addressograph Multigraph
DE2336028A1 (de) * 1973-07-14 1975-02-06 Olympia Werke Ag Vorrichtung zum abschneiden einzelner papierboegen von einer zugefuehrten papierbahn einer kopierpapierrolle
GB2061796A (en) * 1979-11-08 1981-05-20 Pitney Bowes Inc Tubular knife

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011195A1 (fr) * 1990-12-22 1992-07-09 Portals Engineering Limited Guillotine et dispositifs d'avancement de bande
US6003420A (en) * 1994-04-26 1999-12-21 Fuji Photo Film Co., Ltd. Apparatus for manufacturing photographic filmstrips
US6257112B1 (en) 1994-04-26 2001-07-10 Fuji Photo Film Co., Ltd. Apparatus for manufacturing photographic filmstrips
US6336406B1 (en) 1994-04-26 2002-01-08 Fuji Photo Film Co., Ltd. Apparatus for manufacturing photographic filmstrips
EP0691190A3 (fr) * 1994-06-24 1996-06-05 Fuji Photo Film Co Ltd Dispositif pour la production de pellicules photographiques

Also Published As

Publication number Publication date
DE3261742D1 (en) 1985-02-14
EP0061773B1 (fr) 1985-01-02

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