EP0017014A1 - Imprimante à aiguilles avec dispositif de coupe - Google Patents

Imprimante à aiguilles avec dispositif de coupe Download PDF

Info

Publication number
EP0017014A1
EP0017014A1 EP80101205A EP80101205A EP0017014A1 EP 0017014 A1 EP0017014 A1 EP 0017014A1 EP 80101205 A EP80101205 A EP 80101205A EP 80101205 A EP80101205 A EP 80101205A EP 0017014 A1 EP0017014 A1 EP 0017014A1
Authority
EP
European Patent Office
Prior art keywords
needle head
knife blade
roller
curve
dot matrix
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
EP80101205A
Other languages
German (de)
English (en)
Other versions
EP0017014B1 (fr
Inventor
Fritz Siegenthaler
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.)
Ascom Autelca AG
Autelca AG
Original Assignee
Ascom Autelca AG
Autelca 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 Ascom Autelca AG, Autelca AG filed Critical Ascom Autelca AG
Publication of EP0017014A1 publication Critical patent/EP0017014A1/fr
Application granted granted Critical
Publication of EP0017014B1 publication Critical patent/EP0017014B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support

Definitions

  • Dot matrix printers which print on a paper tape pulled off a roll, are usually equipped with a cutting device which, after printing the respective text, cuts the printed piece of paper off the paper tape pulled off the roll.
  • the invention has for its object to reduce the weight and volume of a dot matrix printer which has a cutting device.
  • the needle head 1 is shown in thinner lines than the other parts and is only shown in outline in FIGS. 3 to 6, with the exception of the roller 3 mounted on it on an angled axis 2, which belongs to the cutting device.
  • the paper tape not shown, is guided from the supply roll, also not shown, through an insertion slot 4 and between two conveyor rollers 5, which are driven by a motor 6, onto a pressure bar 7 on which the stationary counter knife 8 of the cutting device is formed.
  • the needle head 1 is slidably on the top of a guide bar 11 and on the bottom by means of guide rollers 12 and 13 on a round rod 14 parallel to the direction of the lines to be printed.
  • the guide bar 11 and the round rod 14, like the pressure beam 7, are attached at one end to the left-hand side wall 15 in FIG. 1 and at the other end to a right intermediate wall 16.
  • the lower guide rollers 12 are profile rollers fixed to the needle head 1 connected axes.
  • the axes of the top Guide rollers 13 are mounted on the fork-shaped slotted ends of a leaf spring 17 fastened in the middle to the needle head 1 and pressed against the round rod 14 with a spring force exceeding the force of gravity for the safe guidance of the needle head 1.
  • a cable drive serves to move the needle head 1.
  • the stretch-proof rope 18 shown in dash-dot lines runs from a rope end fastened to the side wall 15 over a circumferential half of a groove of a double-groove rope pulley 19 mounted on the needle head 1, a rope pulley 20 mounted on the side wall 15 and a rope pulley 21 mounted in a recess in the intermediate wall 16 to a traction sheave 22, which has a screw groove, is arranged between the intermediate wall 16 and a right side wall 23 and is driven by a reversible stepper motor 24.
  • the cable 18 continues over a cable pulley 25 arranged in a second recess in the intermediate wall 16 and over the other circumferential half of the other groove of the double-groove cable pulley 19 to the intermediate wall 16, to which the other cable end is fastened.
  • the needle head 1 When the motor 24 drives the cable 18 with the traction sheave 22 in the direction of the arrows shown in FIG. 1, the needle head 1 is moved in the line writing direction, i.e. 1 and 3 to 6 pulled from right to left, the double-groove pulley 19 rotating in the direction of the arrow shown in FIG. 1. If the cable 18 (after reversing the direction of rotation of the motor 24) is driven in the opposite direction, the direction of rotation of the double-groove pulley 19 also being reversed, the needle head 1 in FIGS. 1 and 3 to 6 is pulled from left to right.
  • the knife blade 27 shown in FIGS. 1 to 5 in its rest position and in FIG. 6 (in a position 27c) shortly before the end of its cutting stroke is slidably guided on the counter knife 8 and on the bar 9.
  • a pressure roller 28 on an axis 29 holds the knife blade 27 on the counter knife 8 and bar 9, a pin 30 and a roller 31 (FIG. 1) guide the knife blade 27 laterally.
  • the cutting edge 33 of the knife blade 27 runs at an obtuse angle V-shaped, symmetrically to the perpendicular bisection of the cutting edge 34 of the counter knife 8. Since the cutting edges 33 and 34 thus do not run parallel but at an acute angle to one another, cutting is carried out in two small places, so that one small feed force for the knife blade 27 is sufficient.
  • the symmetrical course of the cutting edge 33 has the effect that the reaction force during the cutting process acts in the opposite direction parallel to the feed direction of the knife blade 27, that is to say practically no component which loads the lateral guidance (pin 30, roller 31 and the pin 38 and roller 39 mentioned below) has, so that no complex guidance is necessary and the sliding friction is nevertheless negligible.
  • the knife blade 27 is fixedly connected by a spacer 36 to a guide tab 37 which is slidably guided on the bar 11 by a bolt 38 which has a head which extends over the guide tab 37 and a roller 39.
  • the bolt 38 is fastened to a shoulder 40 of the strip 11 and the roller 39 is mounted.
  • the knife blade 27 forms a cam carrier for a curve consisting of three sections 41, 42, 43 of a flat thrust cam mechanism, the drive element of which is the roller 3.
  • the first curve section 41 runs on the back of the knife blade (knife blade back) at right angles to the direction of advance of the knife blade, ie parallel to the guide (11, 14) of the needle head 1 from a position which is assigned to the beginning of the lines to be printed, ie from the position at which the roller 3 is in the rest position of the needle head 1 shown in solid line in FIG. 1, up to a little beyond where the roller 3 is at the end of the lines, at which the needle head and the roller in FIG. 1 and 4 are labeled la and 3a.
  • the second cam section 42 extends essentially at an acute angle to the first cam section 41 and is formed on the side of a cam lever 44 facing away from it.
  • the cam lever 44 is pivotally mounted on the guide tab 37 about a pin 45 and lies with its free end under the action of a tension spring 46 at the location of the first cam section 41, at which the roller 3 is in its mentioned position 3a, with a Switch tongue is comparable.
  • the distance between the pivotably mounted end of the cam lever 44 from the first cam section 41 is so great that the roller 3 can run through between the first cam section 41 and the lever 44 (from right to left in FIG. 1, see FIG. 4).
  • the greatest distance between the second curve section 42 and the first 41 is equal to the stroke of the knife blade 27, which is slightly larger than the distance of the apex 47 from the ends of the obtuse-angled V-shaped cutting edge 33.
  • the third curve section 43 is formed on the edge of an arm 48 facing the first curve section 41, which is made in one piece with the knife blade 27.
  • the third curve section 43 starts from a semicircular arc at the beginning of the first curve section 41 and first runs briefly parallel at a distance from the first curve section 41 that does not exceed the diameter of the roller 3, as a result of which a niche 49 receiving the roller 3 in the rest position of the needle head 1 (FIG 1 and 4 to 6) is formed, then at an acute angle to the first curve section 41 and finally engages over the pivotably mounted end of the curve lever 44 at a distance which is slightly larger than the diameter of the roller 3.
  • the pin 45 is located above a point of the first curve section 41 which is at a smaller distance from its right start (recess 49) in FIG. 1 than from the left end of the first curve section 41 in this figure.
  • the curve inclination angle of the second curve section 42 is accordingly smaller than that of the third curve section 43.
  • Two tension springs 51 are attached at one end to the axis 29 of the pressure roller 28 and at the other end to the knife blade 27 and hold them non-positively with the first and second curve sections 41 and 42 on the roller 3, as in connection with the mode of operation of the dot matrix printer is explained in more detail.
  • the knife blade 27 has on both sides of the path on which the pressure roller 28 runs on it, two trapezoidal cutouts 52 to reduce its mass, so that a small acceleration force is sufficient for the advance of the knife blade 27 and vibrations exert only the lowest possible forces on the knife blade 27.
  • the roller 3 mounted on it In the rest position of the needle head 1, the roller 3 mounted on it is located in the recess 49 of the knife blade 27 (FIGS. 1 and 3).
  • the knife blade 27 is fixed in its rest position.
  • the needle head 1 runs from its rest position 1 to the position la (FIGS. 1 and 4) and back.
  • the roller 3 runs to its position 3a and back on the first curve section 41.
  • the knife blade 27 stops.
  • the cam lever 44 is raised in the position 3a of the roller (position 44a) and returns to its rest position, while the roller 3 runs back on the curve section 41 from the position 3a to its rest position, in which it is designated by 3.
  • the needle head 1 After printing the last line, the needle head 1, after printing the last line, is moved beyond position la to position 1b (FIGS. 1 and 5), in which the roll is in position 3b.
  • position 1b FIGGS. 1 and 5
  • the needle head 1 After the paper belt has been conveyed by driving the conveyor rollers 5 to such an extent that the point to be cut is on the cutting edges 33 and 34 (FIG. 2), the needle head 1 is withdrawn from the position 1b into the rest position 1.
  • the roller runs from position 3b first on the second curve section 42, pushing the knife blade 27 downward. This can be seen from FIG. 6, which shows the needle head and the roller in the operating position 1c or 3c shortly before the end of the cutting stroke of the knife blade 27 :.
  • the roller 3 leaves the second curve section 42 and the knife blade 27 is returned to its rest position by the springs 51 and / or by the roller 3 running on the third curve section 43.
  • the springs 51 are not absolutely necessary because the third curve section 43 reliably brings the knife blade 27 back into its rest position.
  • the sliding friction of the guidance of the knife blade 27 and of the guide tab 37 is sufficient if no shocks occur in order to keep the knife blade 27 in its rest position when the needle head runs from its rest position 1 into its la position and back or into the lb position.
  • the tension of the springs 51 can be so small that it is negligible compared to the force required to overcome the resistance that occurs when cutting off. A very small tension is also sufficient for the spring 46, so that the feed force of the roller 3 required to lift the cam lever 44 into its position 44a shown in FIGS. 1 and 4 is negligible.
  • the force with which the roller 3 running on the second curve section 42 has to be displaced in order to advance the knife blade 27 is, because of the inclination of the second curve section 42, much smaller than the resistance to be overcome by the knife blade 27 for the cutting process, and this is through the angled course of the cutting edge 33 of the knife blade 27 is kept small.
  • the force which the roller 3 running on the third curve section 43 must exert to return the knife blade to its starting position is also negligible, since this curve section 43 is also inclined; it is only necessary to overcome the sliding friction of the knife blade 27 and the flap 37, and if necessary the springs 51 help.
  • the power of the motor 24 for the knife blade drive is thus optimally utilized.
  • the reaction force acting on the needle head 1 during the cutting process does not increase its guide resistance because it is taken up by the guide rollers 12.
  • a drive motor 24 which is dimensioned in the usual way only for displacing the needle head 1 — as has been shown — is sufficient for the additional drive of the cutting device described. It should be borne in mind that in a fast-working needle printer this motor 24 must also be dimensioned to overcome the inertia of the needle head at the beginning of its advancing and retracting movement, and that the roller 3 only after the beginning of the retracting movement of the needle head 1 on the inclined second one Curve section 42 runs, the motor 24 no longer having to accelerate the needle head and thus has reserve power to move the roller 3 during the cutting process.
  • the present dot matrix printer also does not require a special control device for the advancement and retraction of the knife blade 27.
  • this motor can be achieved the last line feed of the needle head 1 rotates a few steps further, whereupon the knife blade 27 is easily advanced and also withdrawn when the needle head 1 is subsequently withdrawn.

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  • Handling Of Sheets (AREA)
EP80101205A 1979-04-02 1980-03-10 Imprimante à aiguilles avec dispositif de coupe Expired EP0017014B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3043/79 1979-04-02
CH304379 1979-04-02

Publications (2)

Publication Number Publication Date
EP0017014A1 true EP0017014A1 (fr) 1980-10-15
EP0017014B1 EP0017014B1 (fr) 1983-07-27

Family

ID=4247337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101205A Expired EP0017014B1 (fr) 1979-04-02 1980-03-10 Imprimante à aiguilles avec dispositif de coupe

Country Status (4)

Country Link
US (1) US4302119A (fr)
EP (1) EP0017014B1 (fr)
JP (1) JPS588997B2 (fr)
DE (1) DE3064355D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320613A1 (de) * 1983-06-08 1984-12-13 F & O Electronic Systems GmbH & Co, 6901 Neckarsteinach Verfahren zum abschneiden einer aufzeichnungen tragenden bahn, wie sie in druckern oder bueromaschinen verwendung findet und vorrichtung zur durchfuehrung des verfahrens
FR2565526A1 (fr) * 1984-06-11 1985-12-13 Eaton Corp Appareil d'impression et mecanisme de coupe
EP0579416A3 (en) * 1992-07-14 1994-06-22 Hewlett Packard Co Cutter driver for a computer driven printer/plotter
US5613788A (en) * 1993-05-10 1997-03-25 Siemens Nixdorf Informationssysteme Aktiengesellschaft Cutting device for cutting a print carrier in a printer

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917514A (en) * 1988-02-01 1990-04-17 Kroy Inc. Thermal printing device and tape supply cartridge embodying a tape cut-off mechanism
US4815874A (en) * 1988-02-01 1989-03-28 Kroy Inc. Thermal printer and tape-ribbon cartridge with cut-off mechanism
US5133615A (en) * 1989-09-07 1992-07-28 Tokyo Electric Co., Ltd. Ticket issuing machine
US5833380A (en) * 1995-11-21 1998-11-10 Seiko Epson Corporation Printer having cutting apparatus and protective device for use in a printer
US5971639A (en) * 1996-11-11 1999-10-26 Samsung Electro-Mechanics Co., Ltd. Paper cutting apparatus in a small-sized printer
US6113293A (en) * 1998-05-28 2000-09-05 Brady Worldwide, Inc. Label printer having lever actuated cutter
US6732619B2 (en) * 2001-11-01 2004-05-11 Brady Worldwide, Inc. Cutter mechanism
US7930958B2 (en) 2005-07-14 2011-04-26 Provo Craft And Novelty, Inc. Blade housing for electronic cutting apparatus
US20100269664A1 (en) * 2009-04-22 2010-10-28 Mike Majchrowski Servo pouch knife assembly
CA2772083C (fr) 2009-08-26 2017-05-09 Provo Craft And Novelty, Inc. Appareil de fabrication comprenant un ensemble de derivation de trajet de delivrance de piece a travailler et analyseur de trajet de delivrance de piece a travailler
US20110280999A1 (en) 2009-12-23 2011-11-17 Provo Craft And Novelty, Inc. Foodstuff Crafting Apparatus, Components, Assembly, and Method for Utilizing the Same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420841A1 (de) * 1974-04-30 1976-04-08 Walther Bueromasch Gmbh Schneidvorrichtung fuer aufzeichnungstraeger o.dgl.
US3951252A (en) * 1973-08-30 1976-04-20 Nixdorf Computer Ag Electromechanical writing device
FR2373397A1 (fr) * 1976-12-07 1978-07-07 Mannesmann Ag Dispositif pour la coupe de bandes de papier en troncons, notamment pour machine imprimante

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393459A (en) * 1965-07-01 1968-07-23 Bendix Corp Probe and probe holding device for a coordinate measuring machine
US3799022A (en) * 1971-07-31 1974-03-26 Agfa Gevaert Ag Apparatus for severing paper sheets or the like
JPS50115727A (fr) * 1974-02-20 1975-09-10
JPS52121404A (en) * 1976-04-05 1977-10-12 Ricoh Kk Carriage feeding mechanism for printer
JPS563172Y2 (fr) * 1977-05-21 1981-01-23
US4211498A (en) * 1978-01-20 1980-07-08 Copal Company Limited Paper cutting and perforated line forming device of printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951252A (en) * 1973-08-30 1976-04-20 Nixdorf Computer Ag Electromechanical writing device
DE2420841A1 (de) * 1974-04-30 1976-04-08 Walther Bueromasch Gmbh Schneidvorrichtung fuer aufzeichnungstraeger o.dgl.
FR2373397A1 (fr) * 1976-12-07 1978-07-07 Mannesmann Ag Dispositif pour la coupe de bandes de papier en troncons, notamment pour machine imprimante

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320613A1 (de) * 1983-06-08 1984-12-13 F & O Electronic Systems GmbH & Co, 6901 Neckarsteinach Verfahren zum abschneiden einer aufzeichnungen tragenden bahn, wie sie in druckern oder bueromaschinen verwendung findet und vorrichtung zur durchfuehrung des verfahrens
FR2565526A1 (fr) * 1984-06-11 1985-12-13 Eaton Corp Appareil d'impression et mecanisme de coupe
EP0579416A3 (en) * 1992-07-14 1994-06-22 Hewlett Packard Co Cutter driver for a computer driven printer/plotter
US5613788A (en) * 1993-05-10 1997-03-25 Siemens Nixdorf Informationssysteme Aktiengesellschaft Cutting device for cutting a print carrier in a printer

Also Published As

Publication number Publication date
US4302119A (en) 1981-11-24
DE3064355D1 (en) 1983-09-01
JPS55132289A (en) 1980-10-14
EP0017014B1 (fr) 1983-07-27
JPS588997B2 (ja) 1983-02-18

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