EP0102022A2 - Dispositif pour tendre une bande de papier d'impression dans une imprimante - Google Patents

Dispositif pour tendre une bande de papier d'impression dans une imprimante Download PDF

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Publication number
EP0102022A2
EP0102022A2 EP83108042A EP83108042A EP0102022A2 EP 0102022 A2 EP0102022 A2 EP 0102022A2 EP 83108042 A EP83108042 A EP 83108042A EP 83108042 A EP83108042 A EP 83108042A EP 0102022 A2 EP0102022 A2 EP 0102022A2
Authority
EP
European Patent Office
Prior art keywords
printing
printing form
platen
printer
stretching
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.)
Withdrawn
Application number
EP83108042A
Other languages
German (de)
English (en)
Other versions
EP0102022A3 (fr
Inventor
Vittorio Pagliaro
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.)
Bull HN Information Systems Italia SpA
Original Assignee
Honeywell Bull Italia SpA
Honeywell Information Systems Italia SpA
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 Honeywell Bull Italia SpA, Honeywell Information Systems Italia SpA filed Critical Honeywell Bull Italia SpA
Publication of EP0102022A2 publication Critical patent/EP0102022A2/fr
Publication of EP0102022A3 publication Critical patent/EP0102022A3/fr
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a printing form stretching device in a printer.
  • the prin ting form has to be suitably stretched and steadly positioned in order to obtain a high printing quality.
  • the printing is generally obtained by means of printing elements moving as to the printing form, as for instance type-bearing drums or belts in case of so-called parallel printers and printing heads movable along the printing line in case of so-called serial prin ters.
  • the movement of the printing element as to the printing form causes some form displacements which may be avoided only by a suitable stret ching of the printing form.
  • the printing form stretching is only provided along the form feed direction(that is the direction transversal to the prin ting line) by means of feeding devices such as pin tractors, pin wheels, friction feeding rollers.
  • the device object of the present invention overcomes such inconvenient and secures a suitable stretching of the printing form along the longi tudinal direction.
  • the device of the present invention achieves the longitudinal stretching of the form by means of elastical pressure rollers mounted on one or more supporting bars.
  • One or more pressure rollers arranged next to the central zone of the printing form and of conventional cylindrical shape, press the form against the printer platen.
  • One or more pressure rollers arranged next to each of the printing form edges and of conical shape, besides pressing the form against the platen, apply on the form edges some longitudinal forces which stretch the form so assuring both a suitable longitudinal stretching along the printing line and a perfect contact with the platen.
  • perspective Figure 1 shows schematically a simplified view of a printer provided with the printing form stretching device of the invention.
  • FIG 1 only shows the printer elementsessential for the invention understanding.
  • the printer comprises a frame, a printing mechanism and a paper feeding mechanism.
  • the frame is for instance constituted by a base 1 and two sides 2, 3.
  • the printing mechanism is constituted by two guiding bars 4, 5 mounted between the sides and on which a printing carriage 6 slides.
  • a printing head 7 is mounted on a printing carriage 6.
  • Head 7 may be for instance of needle type; in such case the printing of the several characters is obtained with dot composition through the selective excitation of the several head needles and the transversal movement of the head and of the carriage.
  • the printing is performed on printing form 9 which partially winds round platen 8.
  • Platen 8 is mounted on a shaft 10 constrained to sides 2, 3.
  • Platen 8 may act as feeding element of the printing form.
  • the printer may be provided with a form feed mechanism constituted by pin tractors operated by a suitable motor.
  • the paper feeding device of the invention comprises some pressure ele. ments 11, 12, 13 mounted on a bar 14 on which they may rotate.
  • Such elements are resilient (preferably of rubber with high friction coefficient) and press printing form 9 against platen 8.
  • Bar 14 parallel to printing platen 8, is arranged next to the printing line (preferably, but not necessarily, downstream such line). Bar 14 is substained, at its ends, by two control levers 15, 16 which may rotate on a lever anchor bar 17 pivoted on sides 2, 3.
  • Such arms owing to the rotation of bar 17, allow to move elements 11, 12, 13 away from platen 8.
  • the pressure and stretching resi lient elements 11, 12, 13 are suitably shaped.
  • element 11 is cylindrical and is arranged next to the central part of bar 14; on the contrary elements 12, 13 are truncated cone-shaped and are arranged next to the ends of bar 14 with their tapers turned towards element 11.
  • Figure 2 shows the cross section of pressure element 12.
  • Pressure element 13 is identical.
  • Element 12 is constituted by a coupling 25, engaged on bar 14 and pro vided with a cylindrical shoulder 2 6 , and by a cylindrical bushing 27 on which a resilient roller 28, preferably of rubber and with cone-shaped external surface, is engaged.
  • Cylindrical shoulder 26 has a radial threaded opening where a locking screw 29, provided with knurled head, is screwed.
  • Bushing 27 is engaged on coupling 25 on which it is free to rotate.
  • the axial movements of bushing 27 (and therefore of conical roller .28) along the coupling are prevented on a side by shoulder 26 and on the other side by a ring or collar 30 housed into a coupling groove.
  • Coupling 25 may be locked on bar 14 in a preestablished axial position by means of locking screw 29.
  • the pressure rollers may be axially moved so as to be arranged next to the printing form edges whatever the printing support width is.
  • Component F tangential to the platen surface, pulls printing form 9 towards its direction.
  • bar 14 instead to be steadly fixed to arms 15, 16, will be pivoted on these ones and will be coupled to suitable driving geara
  • the axial restraint of elements 11, 12, 13 will be preferably obtained with means different from the locking screw, for instance with collect chucks coaxial to bar 14 and provided with locking knurled collar.
  • the lever mechanism which allows to move bar 14 and elements 11, 12, 13 away from the platen is merely explanatory and may be substituted with any spring or cam bistable mechanism or with levers of different type.
  • the printer is designed to print on fixed width forms, the free axial positioning of the cone-shaped elements on bar 14 is not necessary.

Landscapes

  • Handling Of Sheets (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Advancing Webs (AREA)
EP83108042A 1982-08-30 1983-08-13 Dispositif pour tendre une bande de papier d'impression dans une imprimante Withdrawn EP0102022A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2302482 1982-08-30
IT23024/82A IT1153720B (it) 1982-08-30 1982-08-30 Dispositivo di tensionamento del modulo di stampa in una stampante

Publications (2)

Publication Number Publication Date
EP0102022A2 true EP0102022A2 (fr) 1984-03-07
EP0102022A3 EP0102022A3 (fr) 1985-07-03

Family

ID=11203008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108042A Withdrawn EP0102022A3 (fr) 1982-08-30 1983-08-13 Dispositif pour tendre une bande de papier d'impression dans une imprimante

Country Status (4)

Country Link
EP (1) EP0102022A3 (fr)
AU (1) AU1845183A (fr)
BR (1) BR8304647A (fr)
IT (1) IT1153720B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184263A1 (fr) * 1984-12-07 1986-06-11 Koninklijke Philips Electronics N.V. Dispositif pour le transport d'une bande souple

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116155059B (zh) * 2022-12-22 2023-11-17 浙江宝纺印染有限公司 一种仿蜡染印花用摩擦磁电微能源收集装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929327A (en) * 1974-04-01 1975-12-30 Addressograph Multigraph Document transport and registration apparatus
DE2847577A1 (de) * 1978-11-02 1980-05-08 Olympia Werke Ag Tintenschreib-, druck-, kopierwerk mit andruckrollen auf drehbar gelagerter antriebswelle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184263A1 (fr) * 1984-12-07 1986-06-11 Koninklijke Philips Electronics N.V. Dispositif pour le transport d'une bande souple
US4629177A (en) * 1984-12-07 1986-12-16 U.S. Philips Corporation Pressure roller arrangement for a paper transport device

Also Published As

Publication number Publication date
IT8223024A1 (it) 1984-03-01
AU1845183A (en) 1984-03-08
EP0102022A3 (fr) 1985-07-03
IT8223024A0 (it) 1982-08-30
IT1153720B (it) 1987-01-14
BR8304647A (pt) 1984-04-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860303

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Inventor name: PAGLIARO, VITTORIO