EP1219454A2 - Gerät zur schrittweisen Zufuhr eines Papierstreifens von einer Rolle - Google Patents
Gerät zur schrittweisen Zufuhr eines Papierstreifens von einer Rolle Download PDFInfo
- Publication number
- EP1219454A2 EP1219454A2 EP01130057A EP01130057A EP1219454A2 EP 1219454 A2 EP1219454 A2 EP 1219454A2 EP 01130057 A EP01130057 A EP 01130057A EP 01130057 A EP01130057 A EP 01130057A EP 1219454 A2 EP1219454 A2 EP 1219454A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- roll
- buffer
- paper
- feeding
- 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
Links
Images
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
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
-
- 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
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/005—Forming loops or sags in webs, e.g. for slackening a web or for compensating variations of the amount of conveyed web material (by arranging a "dancing roller" in a sag of the web material)
-
- 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
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/16—Means for tensioning or winding the web
- B41J15/165—Means for tensioning or winding the web for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides
Definitions
- This invention relates to a device for the intermittent feeding of a strip of paper from a roll.
- the invention relates to a device for the intermittent feeding of a strip of paper from a roll comprising at least one feeding roller engaging with the strip and interposition means for forming a buffer of paper between roll and roller according to the introductory part of claim 1.
- Such devices are used for instance in printing units, for example for Point-Of-Sale terminals (POS), wherein an ink jet head moves at constant speed in the two printing directions.
- POS Point-Of-Sale terminals
- the strip remains motionless during printing and is fed forward intermittently during the accelerations and braking associated with the inversion of motion.
- the intermittent movement with very steep ramps can be applied to the feeding roller but cannot be applied to the roll on account of its inertia.
- sharp accelerations may cause the paper to tear and sharp braking causes the coils of the roll to slacken.
- the interposition means comprise a spring tensioner which forms a loop on the section of strip before the feeding roller.
- the tension exerted by the roller reduces the loop against the action of the spring and dampens jerking movements.
- the feeding roller stops the strip continues to unwind through inertia from the roll but is taken back by the tensioner, thus opposing the slackening of the coils and reforming the buffer.
- the mode of operation of the spring-based interposition means is conditioned by the amount of paper in the roll, by the friction of the roll in its supports and by the resilience of the spring.
- the effectiveness of these means is furthermore limited to intermittent feeds of the strip of about 1/6", typical of the serial printing of a single line of print.
- POS with "high” heads have been brought out, i.e. POS having a large number of nozzles, for performing simultaneous printing of various lines.
- the amount of information that can be printed per unit of time is thus dramatically increased.
- amplitude of the intermittent motion of the strip is of the order of 1 ⁇ 2" and 1" and the known interposition means cannot manage to work properly during the acceleration and braking ramps of the heads. Accordingly, the times to be allotted for feeding of the strip must be extended beyond those allowed for the inversion of motion, which reduces the printing speeds theoretically achievable.
- One object of this invention is to produce a device for intermittently feeding a strip of paper from a roll, without any jerking and slackening of the coils during the inversion of motion of a printhead, including the case of simultaneous printing of various lines.
- the object of the invention is to produce a device for the intermittent feeding of a strip of paper from a roll, which can work at high speed without jerking and without slackening of the coils of the roll.
- the interposition means comprise control means servodriven in relation to the motion conditions of the feeding roller, according to the characteristic part of claim 1.
- a printing unit for instance for a point of sale terminal (POS), comprising a printhead 21 suitable for writing on a strip of paper 22 and a feeding device 23 for the strip 22.
- POS point of sale terminal
- the head 21 is of the ink jet type, designed to be displaced in the two directions transversally to the strip 22 in front of a printing zone 24 and with inversion of motion in correspondence with the edges of the strip.
- the head 21 is moved by a motor 26 at relatively high and constant speed through the zone 24 in order to type a line of print in every pass, and with rapid acceleration and braking at the extremities of the zone 24 where the inversion of motion takes place.
- the strip of paper 22 is wound in coils on a roll 27 housed in a cradle 28 and the device 23 is adapted for extracting the strip 22 from the roll 27 and feeding it in front of the zone 24.
- Printing takes place during movement of the head 21 at constant speed and while the strip 22 is motionless.
- the device 23 acts intermittently, moving the strip only during the acceleration and braking steps of the head 21.
- the feeding device 23 comprises a feeding roller 29, a pressure roller 31, a step motor 32 connected to the roller 29 and interposition means between roll and roller.
- the two rollers 29 and 31 are in engagement with the strip 22 and the motor 32 turns the feeding roller 29 so as to ensure the intermittent motion of the strip.
- the interposition means are arranged for forming a buffer of paper between the roll 27 and the roller 29 so as to reduce the jerks on the strip when the roller 29 starts and to prevent slackening of the coils on the roll when the roller stops.
- the interposition means comprise a tensioning element 36 controlled by a spring 37 and which forms a loop 38 on a section of the strip 22 before the roller 29.
- the force exerted by the roller 29 on the strip reduces the loop 38 by flexing the spring 37 and is afterwards transferred on to the outermost coil of the roll 27 causing the roll to unwind in the cradle 26. Extraction of the strip may then continue under the flexing conditions reached by the spring.
- the roller stops, through inertia the roll 27 continues to unwind and the strip yielded is taken back by the element 36 which releases the spring 37 and reforms the buffer.
- the mode of operation of the tensioning element 36 is conditioned by the static and dynamic forces acting on the various components, in particular those in relation to the inertia of the roll 27, to the friction of the outermost coil on the cradle 28 and to the resilience of the spring 37, depending on the conditions of use and in particular on the amount of paper wound in the roll 27.
- a printing unit for POS having components equal to those of the unit 19 in figure 1, designated with the same numeral but with a "high" printhead 42, i.e. one in which there are more nozzles than those of the head 21.
- Printing takes place during movement of the head 42 at constant speed and while the strip is motionless but, in this case, many lines may be typed at the same time in the printing zone 24.
- the device 23 acts intermittently, moving the strip only during the acceleration and braking steps of the head 42 in which no printing takes place, but over a relatively great length, for example 1 ⁇ 2" or 1", depending on the number of lines typed in each pass.
- a sensor 43 for detecting the idle or over-travel position of the head 42 and a sensor 44 for detecting the absence of paper, for example when the roll 27 is finished, are also provided.
- the printing unit 41 is connected to an electronic control unit 46 (Fig. 3), comprising the central unit of the POS not depicted in the figures, an interface circuit 47 and a driving circuit 48 (Fig. 3) for the motors 26 and 32 and in operating connection with the sensors 43 and 44.
- an electronic control unit 46 Fig. 3
- a driving circuit 48 Fig. 3
- the interposition means include a tensioning element 51 (Fig. 2) for forming a loop 52 on the strip of paper 22 between roll and feeding roller, having a storage or buffer function.
- the element 51 has for example a roller, engaging with the strip 22 over its entire width, borne by a frame 53 in turn fulcrum-mounted on a pin 54.
- the interposition means comprise control means which are servodriven in relation to the motion conditions of the feeding roller 29 to cause, in a controlled manner, the transfer to the roller 29 of a portion of strip of the buffer formed by the loop 52 and the withdrawal from the roll 27 of that portion for reformation of the buffer.
- the control means include a motor 56 for the rotation of the frame 53, some sections of the central unit of the POS, the circuit 47 and circuitry means 57 for the motor 56.
- the motor 56 is suitable for rotating the frame 53 counter-clockwise, reducing the loop 52, and clockwise, thereby increasing it.
- the motor 56 is a step motor and has a motor pinion meshing with toothing made on an arm of the frame 53.
- An end of travel sensor 58 is suitable for detecting a reference position of the arm with the toothing, corresponding to a loop 52 of predefined maximum dimensions.
- the electronic control unit 46 sets acceleration ramps (Ad, As) and braking ramps (Fd, Fs) on the motor 26 in the two directions for the positions of the head 42 adjacent to the zones of inversion, and constant velocity pulses (Vd, Vs) for the printing zone, as indicated in the graph (a).
- the motor 32 is driven to move the roller 29 with acceleration and braking ramps (Ar, Fr) and constant velocity stretches (Vr) depending on the number of line feeds, as indicated in the graph (b), upon each inversion of motion of the head 42.
- the circuitry means 57 are pre-arranged for driving the motor 56 in a relation of dependency on the conditions and/or the law of motion set on the motor 32.
- the motor 56 is powered so as to turn the frame 53 counter-clockwise with a first acceleration ramp and a first braking ramp (Atr, Ftr), graph (c) in Fig. 4, from the working position "I” to the position "II", depending on the acceleration ramp and/or the constant speed commands on the motor 32 (Ar, Vr), graph (b).
- the loop 52 decreases and the roller 29 can accelerate the paper without jerking with the roll substantially motionless, with commands for the motor 56 suitable for maintaining the roller of the frame 53 (Fig. 2) in adherence with the strip 22.
- the roller 29 can start extracting the strip from the roll 27, putting it gradually into rotation and continuing the extraction with the loop constant in the event of a large number of line feeds or a jump.
- the step of extracting the strip from the roll 27 by the frame 53 and of reforming the buffer may take place at low speed, clearly overlapping with the printing step, as depicted in Fig. 5.
- the circuitry means 57 drive the motor 56 in substantially the same way on each inversion of motion of the head 42.
- the circuitry means 57 are easily programmable at design or maintenance time to extract from the roll 27 a portion of strip according to a law of motion such as to minimize its tensions in the acceleration steps and the slackening of the coils of the roll in the braking steps even under limit conditions, by modifying the ramps.
- this could be associated with the sequences in which the sensor 44 detects the absence of paper condition due to the roll being finished and which is followed by the annulling of the paper-out condition due to substitution of the roll. Recognition of these sequences could trigger off a programme of ramps for the, motor 56, different from the normal ones.
- the ramps for a full roll are illustrated, for instance, in the graph (b) of Fig. 7, in relation to the graph (a) of the motor 32 and substantially identical to that of graph (a) in Fig. 5.
- the place of the motor 56 could be taken by other linear actuators, such as suitably programmed electromagnets.
- the motor could also be of the direct-current and impulse-control type and having control of one or more reference positions.
- the over-travel sensor 58 could be removed and control of the position "R" be entrusted instead to a fixed abutment on the frame 53, to be reached slowly in the initialization step, according to a known technique.
- the device has been applied to a printing unit, it could also be used to advantage in other sectors wherein a strip of paper is unwound from a roll and subjected to an intermittent feeding.
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Replacement Of Web Rolls (AREA)
- Advancing Webs (AREA)
- Unwinding Webs (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
- Coating With Molten Metal (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2000TO001192A IT1321127B1 (it) | 2000-12-20 | 2000-12-20 | Dispositivo per l'avanzamento intermittente di una striscia di cartada un rotolo. |
ITTO001192 | 2000-12-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1219454A2 true EP1219454A2 (de) | 2002-07-03 |
EP1219454A3 EP1219454A3 (de) | 2003-07-23 |
EP1219454B1 EP1219454B1 (de) | 2009-09-16 |
Family
ID=11458312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01130057A Expired - Lifetime EP1219454B1 (de) | 2000-12-20 | 2001-12-18 | Gerät zur schrittweisen Zufuhr eines Papierstreifens von einer Rolle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1219454B1 (de) |
AT (1) | ATE442960T1 (de) |
DE (1) | DE60139918D1 (de) |
IT (1) | IT1321127B1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004041542A1 (fr) * | 2002-11-04 | 2004-05-21 | Denis Montagutelli | Dispositif de delivrance d'un coupon imprime destine a equiper un mecanisme d'impression thermique notamment. |
EP1508451A2 (de) * | 2003-08-19 | 2005-02-23 | Taeil System Co., Ltd. | Digitale Textildruckmaschine |
FR2870782A1 (fr) * | 2004-05-25 | 2005-12-02 | Dubuit Internat | Machine d'impression d'une bande |
NL1027001C2 (nl) * | 2004-09-09 | 2006-03-13 | Oce Tech Bv | Inkjet printer. |
NL1027002C2 (nl) * | 2004-09-09 | 2006-03-13 | Oce Tech Bv | Werkwijze voor het bedrukken van een substraat met een inkjet printer, en een inkjet printer geschikt om deze werkwijze toe te passen. |
CN102387974A (zh) * | 2009-04-02 | 2012-03-21 | Aps制造单人私人有限责任公司 | 力矩检测设备、打印机和运行方法 |
JP2018187809A (ja) * | 2017-04-28 | 2018-11-29 | 株式会社ミマキエンジニアリング | 印刷装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435216A2 (de) * | 1989-12-25 | 1991-07-03 | Dainippon Screen Mfg. Co., Ltd. | Vorrichtung und Verfahren zur Bildaufzeichnung |
GB2250273A (en) * | 1990-11-29 | 1992-06-03 | Molins Plc | Web tension control system |
JPH06127773A (ja) * | 1992-10-13 | 1994-05-10 | Hitachi Seiko Ltd | 輪転印刷機における張力制御装置 |
US5468080A (en) * | 1993-03-25 | 1995-11-21 | Jones; William B. | Poly bag printer for packaging machine |
US5717836A (en) * | 1995-03-09 | 1998-02-10 | Matsushita Electric Industrial Co., Ltd. | Printing apparatus having a retractable curl removal member and reversible roller |
US5791541A (en) * | 1996-12-24 | 1998-08-11 | Tokyo Kikai Seisakusho, Ltd. | Tension controller for controlling tension of running paper web |
-
2000
- 2000-12-20 IT IT2000TO001192A patent/IT1321127B1/it active
-
2001
- 2001-12-18 AT AT01130057T patent/ATE442960T1/de not_active IP Right Cessation
- 2001-12-18 DE DE60139918T patent/DE60139918D1/de not_active Expired - Lifetime
- 2001-12-18 EP EP01130057A patent/EP1219454B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435216A2 (de) * | 1989-12-25 | 1991-07-03 | Dainippon Screen Mfg. Co., Ltd. | Vorrichtung und Verfahren zur Bildaufzeichnung |
GB2250273A (en) * | 1990-11-29 | 1992-06-03 | Molins Plc | Web tension control system |
JPH06127773A (ja) * | 1992-10-13 | 1994-05-10 | Hitachi Seiko Ltd | 輪転印刷機における張力制御装置 |
US5468080A (en) * | 1993-03-25 | 1995-11-21 | Jones; William B. | Poly bag printer for packaging machine |
US5717836A (en) * | 1995-03-09 | 1998-02-10 | Matsushita Electric Industrial Co., Ltd. | Printing apparatus having a retractable curl removal member and reversible roller |
US5791541A (en) * | 1996-12-24 | 1998-08-11 | Tokyo Kikai Seisakusho, Ltd. | Tension controller for controlling tension of running paper web |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 431 (M-1653), 11 August 1994 (1994-08-11) & JP 06 127773 A (HITACHI SEIKO LTD), 10 May 1994 (1994-05-10) * |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100446987C (zh) * | 2002-11-04 | 2008-12-31 | Aps工程公司 | 特别适于配备热打印机构的用于供给打印凭单的设备 |
WO2004041542A1 (fr) * | 2002-11-04 | 2004-05-21 | Denis Montagutelli | Dispositif de delivrance d'un coupon imprime destine a equiper un mecanisme d'impression thermique notamment. |
EP1508451A2 (de) * | 2003-08-19 | 2005-02-23 | Taeil System Co., Ltd. | Digitale Textildruckmaschine |
EP1508451A3 (de) * | 2003-08-19 | 2005-03-02 | Taeil System Co., Ltd. | Digitale Textildruckmaschine |
CN100453314C (zh) * | 2003-08-19 | 2009-01-21 | 株式会社泰一系统 | 数字织物印刷机 |
FR2870782A1 (fr) * | 2004-05-25 | 2005-12-02 | Dubuit Internat | Machine d'impression d'une bande |
NL1027001C2 (nl) * | 2004-09-09 | 2006-03-13 | Oce Tech Bv | Inkjet printer. |
EP1634716A1 (de) * | 2004-09-09 | 2006-03-15 | Océ-Technologies B.V. | Tintenstrahldrucker |
EP1634714A1 (de) * | 2004-09-09 | 2006-03-15 | Océ-Technologies B.V. | Verfahren zum Bedrucken eines Substrates und ein Tintenstrahldrucker geeignet dafür |
NL1027002C2 (nl) * | 2004-09-09 | 2006-03-13 | Oce Tech Bv | Werkwijze voor het bedrukken van een substraat met een inkjet printer, en een inkjet printer geschikt om deze werkwijze toe te passen. |
US7673983B2 (en) | 2004-09-09 | 2010-03-09 | Oće-Technologies B.V. | Inkjet printer |
CN1746037B (zh) * | 2004-09-09 | 2010-05-26 | 奥西-技术有限公司 | 喷墨打印机 |
US7794078B2 (en) | 2004-09-09 | 2010-09-14 | Oce-Technologies B.V. | Method of printing a substrate with an inkjet printer, and an inkjet printer suitable for performing this method |
CN1746035B (zh) * | 2004-09-09 | 2011-07-06 | 奥西-技术有限公司 | 通过喷墨打印机打印基材的方法以及实施该方法的喷墨打印机 |
CN102387974A (zh) * | 2009-04-02 | 2012-03-21 | Aps制造单人私人有限责任公司 | 力矩检测设备、打印机和运行方法 |
JP2018187809A (ja) * | 2017-04-28 | 2018-11-29 | 株式会社ミマキエンジニアリング | 印刷装置 |
JP2022088510A (ja) * | 2017-04-28 | 2022-06-14 | 株式会社ミマキエンジニアリング | 印刷装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1219454B1 (de) | 2009-09-16 |
ITTO20001192A1 (it) | 2002-06-20 |
ITTO20001192A0 (it) | 2000-12-20 |
IT1321127B1 (it) | 2003-12-30 |
ATE442960T1 (de) | 2009-10-15 |
DE60139918D1 (de) | 2009-10-29 |
EP1219454A3 (de) | 2003-07-23 |
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